Resolve "StEP00358 Schnittstelle zum OER Portal Niedersachsen"

20 files changed, 2119 insertions, 1927 deletions

diff --git a/app/controllers/course/timesrooms.php b/app/controllers/course/timesrooms.php
index 486d7b0..3e11e62 100644
--- a/app/controllers/course/timesrooms.php
+++ b/app/controllers/course/timesrooms.php
@@ -1057,7 +1057,7 @@ class Course_TimesroomsController extends AuthenticatedController
             $end_semester = $this->course->semesters;
         }
 
-        $this->start_weeks = $this->course->start_semester->getStartWeeks($this->course->duration_time);
+        $this->start_weeks = $end_semester[count($end_semester) - 1]->getStartWeeks();
 
         if (!empty($end_semester)) {
             $this->end_semester_weeks = [];
diff --git a/app/controllers/oer/endpoints.php b/app/controllers/oer/endpoints.php
index f193139..552a757 100755
--- a/app/controllers/oer/endpoints.php
+++ b/app/controllers/oer/endpoints.php
@@ -131,6 +131,7 @@ class Oer_EndpointsController extends StudipController
             ];
             $data['data'] = $material->toArray();
             unset($data['data']['material_id']);
+            unset($data['data']['uri_hash']);
             $data['users'] = [];
             foreach ($material->users as $userdata) {
                 $user = $userdata['external_contact']
@@ -242,7 +243,8 @@ class Oer_EndpointsController extends StudipController
                     'player_url' => $material['player_url'],
                     'tool' => $material['tool'],
                     'structure' => ($material['structure'] ? $material['structure']->getArrayCopy() : null),
-                    'license' => $material['license']
+                    'license' => $material['license'],
+                    'uri' => $material['uri']
                 ],
                 'users' => $users,
                 'topics' => $topics,
diff --git a/app/controllers/oer/mymaterial.php b/app/controllers/oer/mymaterial.php
index bb83bca..6f6f4c3 100755
--- a/app/controllers/oer/mymaterial.php
+++ b/app/controllers/oer/mymaterial.php
@@ -8,7 +8,6 @@ class Oer_MymaterialController extends AuthenticatedController
     {
         parent::before_filter($action, $args);
         PageLayout::setTitle(_('Lernmaterialien'));
-
     }
 
     public function index_action()
@@ -36,6 +35,7 @@ class Oer_MymaterialController extends AuthenticatedController
             return;
         } elseif (Request::isPost()) {
             $was_new = $material->isNew();
+            $was_on_twillo = (bool) $material['published_id_on_twillo'];
             $material->setData(Request::getArray('data'));
             $material['host_id'] = null;
             $material['license_identifier'] = Request::get('license', 'CC-BY-SA-4.0');
@@ -131,6 +131,19 @@ class Oer_MymaterialController extends AuthenticatedController
 
             $material->pushDataToIndexServers();
 
+            if (Config::get()->OERCAMPUS_ENABLE_TWILLO && TwilloConnector::getTwilloUserID()) {
+                if (Request::bool('publish_on_twillo') || $_SESSION['NEW_OER']['publish_on_twillo']) {
+                    //upload it to twillo.de
+                    $succes_or_error = $material->uploadToTwillo($material);
+                    if (is_string($succes_or_error)) {
+                        PageLayout::postWarning(_('Konnte Material nicht zu twillo.de hochladen.'), [$succes_or_error]);
+                    }
+                } elseif ($was_on_twillo) {
+                    //remove it from twillo.de if able
+                    $material->deleteFromTwillo();
+                }
+            }
+
             unset($_SESSION['NEW_OER']);
 
             PageLayout::postSuccess(_('Lernmaterial erfolgreich gespeichert.'));
diff --git a/app/views/oer/mymaterial/edit.php b/app/views/oer/mymaterial/edit.php
index 5b20618..434414f 100755
--- a/app/views/oer/mymaterial/edit.php
+++ b/app/views/oer/mymaterial/edit.php
@@ -238,6 +238,15 @@
                        value="<?= htmlReady($template['module_id']) ?>">
             <? endif ?>
 
+            <? if (Config::get()->OERCAMPUS_ENABLE_TWILLO && TwilloConnector::getTwilloUserID()) : ?>
+                <input type="hidden" name="publish_on_twillo" value="0">
+                <label style="margin-top: 20px;">
+                    <input type="checkbox"
+                           name="publish_on_twillo"
+                           value="1"<?= $material['published_id_on_twillo'] ? " checked" : "" ?>>
+                    <?= _('Auf twillo.de veröffentlichen') ?>
+                </label>
+            <? endif ?>
         </fieldset>
 
         <? if (!Config::get()->OER_DISABLE_LICENSE) : ?>
diff --git a/cli/twillo_generate_keys.php b/cli/twillo_generate_keys.php
new file mode 100644
index 0000000..0d1f5d1
--- /dev/null
+++ b/cli/twillo_generate_keys.php
@@ -0,0 +1,36 @@
+#!/usr/bin/env php
+<?php
+require_once 'studip_cli_env.inc.php';
+
+$app_id = str_replace(" ", "-", Config::get()->UNI_NAME_CLEAN);
+
+$privatekey = @file_get_contents('../config/twillo-private.key');
+
+if (!$privatekey) {
+    $key = EduSharingHelper::generateKeyPair();
+    $success = file_put_contents(
+        '../config/twillo.properties.xml',
+        EduSharingHelper::generateEduAppXMLData($app_id, $key['publickey'])
+    );
+    if ($success !== false) {
+        file_put_contents(
+            '../config/twillo-private.key',
+            $key['privatekey']
+        );
+        Config::get()->store('OERCAMPUS_TWILLO_APPID', $app_id);
+        echo "Wrote config/twillo.properties.xml file. Next steps:
+
+- Send the file config/twillo.properties.xml to the twillo.de administrators support.twillo@tib.eu . If they ask you to change the app-ID, you can do this in the system at Admin -> System -> Configuration by editing the config value OERCAMPUS_TWILLO_APPID.
+- Leave the config/twillo-private.key file as it is in the config folder. This file is important for the API to work.
+- You need to either have or create a datafield for users which contains the DFN-AAI-ID of a person. Without this ID in the datafield a user cannot upload to twillo.de due to technical restrictions.
+- Copy the datafield_id of this datafield (you find this in the DB-table datafields). In Stud.IP go to Admin -> System -> Configuration and edit the config value OERCAMPUS_TWILLO_DFNAAIID_DATAFIELD. What you inserted, should look like 6a9ee3ca3685d2551698a3dc6f0f0eff.
+- Once the twillo.de adminstrators received your file and registered your Stud.IP, you can enable the connection to twillo: Go to Admin -> System -> Configuration and edit the config value OERCAMPUS_ENABLE_TWILLO and switch it on.
+
+There you go. From now on all your users with a given DFN-AAI-ID should be able to upload their OERs to twillo.de.
+";
+    } else {
+        echo "No permission to write into folder config. Cannot save private and public keys.\n";
+    }
+} else {
+    echo "Private key already exists. Remove it or be happy that it is there.\n";
+}
diff --git a/composer.json b/composer.json
index 50b3f8a..9412161 100644
--- a/composer.json
+++ b/composer.json
@@ -7,18 +7,21 @@
     "require-dev": {
         "adlawson/vfs": "~0.12.1",
         "camspiers/json-pretty": "~1.0.2",
+        "codeception/codeception": "4.0.2",
         "monolog/monolog": "~1.21.0",
         "php-http/curl-client": "~1.7.0",
-        "woohoolabs/yang": "2.3.2",
-        "codeception/codeception": "~4.1.21",
-        "codeception/module-asserts": "^1.3"
+        "phpunit/phpunit": "6.5.14",
+        "woohoolabs/yang": "~0.9.0",
+        "codeception/module-phpbrowser": "^1.0",
+        "codeception/module-asserts": "^1.1"
     },
     "require": {
         "php": "^7.2",
         "guzzlehttp/psr7": "~1.4.2",
-        "neomerx/json-api": "4.0.1",
+        "neomerx/json-api": "~1.0.9",
+        "slim/slim": "~3.12.3",
         "spomky-labs/otphp": "^8.3.3",
-        "tuupola/cors-middleware": "1.2.1",
+        "tuupola/cors-middleware": "~0.5.2",
         "tecnickcom/tcpdf": "^6.3",
         "scssphp/scssphp": "^1.4",
         "symfony/yaml": "^3.4",
@@ -45,6 +48,7 @@
         "opis/json-schema": "^1.0",
         "slim/psr7": "1.4",
         "slim/slim": "4.7.1",
-        "php-di/php-di": "6.3.4"
+        "php-di/php-di": "6.3.4",
+        "league/oauth2-client": "^2.6"
     }
 }
diff --git a/composer.lock b/composer.lock
index 440bb70..50c988c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "98af1effd6c2da72cc51ac552e851451",
+    "content-hash": "470f6b148b8f1f3421c22c149df783a0",
     "packages": [
         {
             "name": "algo26-matthias/idna-convert",
@@ -275,34 +275,94 @@
             "time": "2020-06-29T00:56:53+00:00"
         },
         {
-            "name": "fig/http-message-util",
-            "version": "1.1.5",
+            "name": "gossi/docblock",
+            "version": "v1.6",
             "source": {
                 "type": "git",
-                "url": "https://github.com/php-fig/http-message-util.git",
-                "reference": "9d94dc0154230ac39e5bf89398b324a86f63f765"
+                "url": "https://github.com/gossi/docblock.git",
+                "reference": "d7e2f299279f5aebbfddeef1c119e26bef4bc7e9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/http-message-util/zipball/9d94dc0154230ac39e5bf89398b324a86f63f765",
-                "reference": "9d94dc0154230ac39e5bf89398b324a86f63f765",
+                "url": "https://api.github.com/repos/gossi/docblock/zipball/d7e2f299279f5aebbfddeef1c119e26bef4bc7e9",
+                "reference": "d7e2f299279f5aebbfddeef1c119e26bef4bc7e9",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.3 || ^7.0 || ^8.0"
+                "phootwork/collection": "^1.5",
+                "php": ">=5.6"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^5.7",
+                "sami/sami": "^4|^3"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "gossi\\docblock\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Thomas Gossmann",
+                    "homepage": "http://gos.si"
+                }
+            ],
+            "description": "PHP Docblock parser and generator. An API to read and write Docblocks.",
+            "keywords": [
+                "docblock",
+                "generator",
+                "parser"
+            ],
+            "support": {
+                "issues": "https://github.com/gossi/docblock/issues",
+                "source": "https://github.com/gossi/docblock/tree/master"
+            },
+            "time": "2017-07-01T18:10:54+00:00"
+        },
+        {
+            "name": "guzzlehttp/guzzle",
+            "version": "6.3.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/guzzle.git",
+                "reference": "407b0cb880ace85c9b63c5f9551db498cb2d50ba"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/407b0cb880ace85c9b63c5f9551db498cb2d50ba",
+                "reference": "407b0cb880ace85c9b63c5f9551db498cb2d50ba",
+                "shasum": ""
+            },
+            "require": {
+                "guzzlehttp/promises": "^1.0",
+                "guzzlehttp/psr7": "^1.4",
+                "php": ">=5.5"
+            },
+            "require-dev": {
+                "ext-curl": "*",
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
+                "psr/log": "^1.0"
             },
             "suggest": {
-                "psr/http-message": "The package containing the PSR-7 interfaces"
+                "psr/log": "Required for using the Log middleware"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.1.x-dev"
+                    "dev-master": "6.3-dev"
                 }
             },
             "autoload": {
+                "files": [
+                    "src/functions_include.php"
+                ],
                 "psr-4": {
-                    "Fig\\Http\\Message\\": "src/"
+                    "GuzzleHttp\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -311,52 +371,61 @@
             ],
             "authors": [
                 {
-                    "name": "PHP-FIG",
-                    "homepage": "https://www.php-fig.org/"
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
                 }
             ],
-            "description": "Utility classes and constants for use with PSR-7 (psr/http-message)",
+            "description": "Guzzle is a PHP HTTP client library",
+            "homepage": "http://guzzlephp.org/",
             "keywords": [
+                "client",
+                "curl",
+                "framework",
                 "http",
-                "http-message",
-                "psr",
-                "psr-7",
-                "request",
-                "response"
+                "http client",
+                "rest",
+                "web service"
             ],
             "support": {
-                "issues": "https://github.com/php-fig/http-message-util/issues",
-                "source": "https://github.com/php-fig/http-message-util/tree/1.1.5"
+                "issues": "https://github.com/guzzle/guzzle/issues",
+                "source": "https://github.com/guzzle/guzzle/tree/master"
             },
-            "time": "2020-11-24T22:02:12+00:00"
+            "time": "2018-04-22T15:46:56+00:00"
         },
         {
-            "name": "gossi/docblock",
-            "version": "v1.6",
+            "name": "guzzlehttp/promises",
+            "version": "v1.3.1",
             "source": {
                 "type": "git",
-                "url": "https://github.com/gossi/docblock.git",
-                "reference": "d7e2f299279f5aebbfddeef1c119e26bef4bc7e9"
+                "url": "https://github.com/guzzle/promises.git",
+                "reference": "a59da6cf61d80060647ff4d3eb2c03a2bc694646"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/gossi/docblock/zipball/d7e2f299279f5aebbfddeef1c119e26bef4bc7e9",
-                "reference": "d7e2f299279f5aebbfddeef1c119e26bef4bc7e9",
+                "url": "https://api.github.com/repos/guzzle/promises/zipball/a59da6cf61d80060647ff4d3eb2c03a2bc694646",
+                "reference": "a59da6cf61d80060647ff4d3eb2c03a2bc694646",
                 "shasum": ""
             },
             "require": {
-                "phootwork/collection": "^1.5",
-                "php": ">=5.6"
+                "php": ">=5.5.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^5.7",
-                "sami/sami": "^4|^3"
+                "phpunit/phpunit": "^4.0"
             },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4-dev"
+                }
+            },
             "autoload": {
                 "psr-4": {
-                    "gossi\\docblock\\": "src"
-                }
+                    "GuzzleHttp\\Promise\\": "src/"
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -364,21 +433,20 @@
             ],
             "authors": [
                 {
-                    "name": "Thomas Gossmann",
-                    "homepage": "http://gos.si"
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
                 }
             ],
-            "description": "PHP Docblock parser and generator. An API to read and write Docblocks.",
+            "description": "Guzzle promises library",
             "keywords": [
-                "docblock",
-                "generator",
-                "parser"
+                "promise"
             ],
             "support": {
-                "issues": "https://github.com/gossi/docblock/issues",
-                "source": "https://github.com/gossi/docblock/tree/master"
+                "issues": "https://github.com/guzzle/promises/issues",
+                "source": "https://github.com/guzzle/promises/tree/master"
             },
-            "time": "2017-07-01T18:10:54+00:00"
+            "time": "2016-12-20T10:07:11+00:00"
         },
         {
             "name": "guzzlehttp/psr7",
@@ -596,6 +664,76 @@
             "time": "2019-10-25T12:34:43+00:00"
         },
         {
+            "name": "league/oauth2-client",
+            "version": "2.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/thephpleague/oauth2-client.git",
+                "reference": "badb01e62383430706433191b82506b6df24ad98"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/thephpleague/oauth2-client/zipball/badb01e62383430706433191b82506b6df24ad98",
+                "reference": "badb01e62383430706433191b82506b6df24ad98",
+                "shasum": ""
+            },
+            "require": {
+                "guzzlehttp/guzzle": "^6.0 || ^7.0",
+                "paragonie/random_compat": "^1 || ^2 || ^9.99",
+                "php": "^5.6 || ^7.0 || ^8.0"
+            },
+            "require-dev": {
+                "mockery/mockery": "^1.3",
+                "php-parallel-lint/php-parallel-lint": "^1.2",
+                "phpunit/phpunit": "^5.7 || ^6.0 || ^9.3",
+                "squizlabs/php_codesniffer": "^2.3 || ^3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-2.x": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "League\\OAuth2\\Client\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Alex Bilbie",
+                    "email": "hello@alexbilbie.com",
+                    "homepage": "http://www.alexbilbie.com",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Woody Gilk",
+                    "homepage": "https://github.com/shadowhand",
+                    "role": "Contributor"
+                }
+            ],
+            "description": "OAuth 2.0 Client Library",
+            "keywords": [
+                "Authentication",
+                "SSO",
+                "authorization",
+                "identity",
+                "idp",
+                "oauth",
+                "oauth2",
+                "single sign on"
+            ],
+            "support": {
+                "issues": "https://github.com/thephpleague/oauth2-client/issues",
+                "source": "https://github.com/thephpleague/oauth2-client/tree/2.6.0"
+            },
+            "time": "2020-10-28T02:03:40+00:00"
+        },
+        {
             "name": "mishal/iless",
             "version": "2.2.0",
             "source": {
@@ -713,37 +851,36 @@
         },
         {
             "name": "neomerx/json-api",
-            "version": "v4.0.1",
+            "version": "v1.0.9",
             "source": {
                 "type": "git",
                 "url": "https://github.com/neomerx/json-api.git",
-                "reference": "0e45254a4574a3118e0ed663312b43aca23b89c7"
+                "reference": "c911b7494496e79f9de72ee40d6a2b791caaf95b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/neomerx/json-api/zipball/0e45254a4574a3118e0ed663312b43aca23b89c7",
-                "reference": "0e45254a4574a3118e0ed663312b43aca23b89c7",
+                "url": "https://api.github.com/repos/neomerx/json-api/zipball/c911b7494496e79f9de72ee40d6a2b791caaf95b",
+                "reference": "c911b7494496e79f9de72ee40d6a2b791caaf95b",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.1.0"
+                "php": ">=5.5.0",
+                "psr/http-message": "^1.0",
+                "psr/log": "^1.0"
             },
             "require-dev": {
-                "friendsofphp/php-cs-fixer": "^2.14",
-                "mockery/mockery": "^1.0",
+                "mockery/mockery": "~0.9.4",
+                "monolog/monolog": "^1.18",
                 "phpmd/phpmd": "^2.6",
-                "phpunit/phpunit": "^7.0",
-                "scrutinizer/ocular": "^1.4",
-                "squizlabs/php_codesniffer": "^2.9"
+                "phpunit/phpunit": "^4.6 || ^5.0 || ^6.0",
+                "scrutinizer/ocular": "^1.3",
+                "squizlabs/php_codesniffer": "^2.5"
             },
             "type": "library",
             "autoload": {
                 "psr-4": {
                     "Neomerx\\JsonApi\\": "src/"
-                },
-                "files": [
-                    "src/I18n/format.php"
-                ]
+                }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -767,9 +904,9 @@
             ],
             "support": {
                 "issues": "https://github.com/neomerx/json-api/issues",
-                "source": "https://github.com/neomerx/json-api/tree/develop"
+                "source": "https://github.com/neomerx/json-api/tree/v1.x"
             },
-            "time": "2020-03-03T05:56:54+00:00"
+            "time": "2018-02-21T13:45:30+00:00"
         },
         {
             "name": "nikic/fast-route",
@@ -822,71 +959,6 @@
             "time": "2018-02-13T20:26:39+00:00"
         },
         {
-            "name": "opis/closure",
-            "version": "3.6.2",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/opis/closure.git",
-                "reference": "06e2ebd25f2869e54a306dda991f7db58066f7f6"
-            },
-            "dist": {
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-                "url": "https://api.github.com/repos/opis/closure/zipball/06e2ebd25f2869e54a306dda991f7db58066f7f6",
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-            "description": "Common Container Interface (PHP FIG PSR-11)",
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+            "description": "Pimple, a simple Dependency Injection Container",
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                 "container",
-                "container-interface",
-                "container-interop",
-                "psr"
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-                "source": "https://github.com/php-fig/container/tree/master"
+                "issues": "https://github.com/silexphp/Pimple/issues",
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-                "http",
-                "message",
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-                "request",
-                "response"
+                "PSR-11",
+                "container",
+                "container-interface",
+                "container-interop",
+                "psr"
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+                "issues": "https://github.com/php-fig/container/issues",
+                "source": "https://github.com/php-fig/container/tree/master"
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@@ -2164,26 +1810,10 @@
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+                "source": "https://github.com/slimphp/Slim/tree/3.x"
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@@ -2472,89 +2102,6 @@
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                 "cors",
                 "middleware",
-                "psr-15",
-                "psr-7"
+                "slim"
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-                "source": "https://github.com/tuupola/http-factory/tree/1.3.0"
+                "source": "https://github.com/tuupola/cors-middleware/tree/master"
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@@ -3025,26 +2429,25 @@
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-                "symfony/phpunit-bridge": "~3|~4|~5",
-                "symfony/yaml": "~3|~4|~5"
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@@ -3071,7 +2474,7 @@
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                 }
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+            "description": "Gherkin DSL parser for PHP 5.3",
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@@ -3083,9 +2486,9 @@
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-                "source": "https://github.com/Behat/Gherkin/tree/v4.8.0"
+                "source": "https://github.com/Behat/Gherkin/tree/master"
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-            "time": "2021-02-04T12:44:21+00:00"
+            "time": "2020-03-17T14:03:26+00:00"
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@@ -3195,28 +2598,28 @@
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+            "version": "4.0.2",
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-                "php": ">=5.6.0 <9.0",
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@@ -3224,17 +2627,17 @@
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-                "codeception/module-db": "1.*@dev",
-                "codeception/module-filesystem": "1.*@dev",
-                "codeception/module-phpbrowser": "1.*@dev",
+                "codeception/module-asserts": "*@dev",
+                "codeception/module-cli": "*@dev",
+                "codeception/module-db": "*@dev",
+                "codeception/module-filesystem": "*@dev",
+                "codeception/module-phpbrowser": "*@dev",
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                 "squizlabs/php_codesniffer": "~2.0",
                 "symfony/process": ">=2.7 <6.0",
-                "vlucas/phpdotenv": "^2.0 | ^3.0 | ^4.0 | ^5.0"
+                "vlucas/phpdotenv": "^2.0 | ^3.0 | ^4.0"
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@@ -3278,34 +2681,28 @@
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-                "source": "https://github.com/Codeception/Codeception/tree/4.1.21"
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+            },
+            "require-dev": {
+                "symfony/http-kernel": "~2.8|~3.0|~4.0"
             },
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-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Symfony\\Polyfill\\Intl\\Grapheme\\": ""
+                    "Symfony\\Component\\Debug\\": ""
                 },
-                "files": [
-                    "bootstrap.php"
+                "exclude-from-classmap": [
+                    "/Tests/"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -6070,26 +5209,18 @@
             ],
             "authors": [
                 {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
                 },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony polyfill for intl's grapheme_* functions",
+            "description": "Symfony Debug Component",
             "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "grapheme",
-                "intl",
-                "polyfill",
-                "portable",
-                "shim"
-            ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-intl-grapheme/tree/v1.23.0"
+                "source": "https://github.com/symfony/debug/tree/3.4"
             },
             "funding": [
                 {
@@ -6105,47 +5236,45 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-05-27T09:17:38+00:00"
+            "time": "2020-09-08T22:19:14+00:00"
         },
         {
-            "name": "symfony/polyfill-intl-normalizer",
-            "version": "v1.23.0",
+            "name": "symfony/dom-crawler",
+            "version": "v3.4.45",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/polyfill-intl-normalizer.git",
-                "reference": "8590a5f561694770bdcd3f9b5c69dde6945028e8"
+                "url": "https://github.com/symfony/dom-crawler.git",
+                "reference": "82fe363780d2d2089066e34495a7f8bd56f2bf84"
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-                "reference": "8590a5f561694770bdcd3f9b5c69dde6945028e8",
+                "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/82fe363780d2d2089066e34495a7f8bd56f2bf84",
+                "reference": "82fe363780d2d2089066e34495a7f8bd56f2bf84",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.1"
+                "php": "^5.5.9|>=7.0.8",
+                "symfony/polyfill-ctype": "~1.8",
+                "symfony/polyfill-mbstring": "~1.0"
+            },
+            "require-dev": {
+                "symfony/css-selector": "~2.8|~3.0|~4.0"
             },
             "suggest": {
-                "ext-intl": "For best performance"
+                "symfony/css-selector": ""
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.23-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Symfony\\Polyfill\\Intl\\Normalizer\\": ""
+                    "Symfony\\Component\\DomCrawler\\": ""
                 },
-                "files": [
-                    "bootstrap.php"
-                ],
-                "classmap": [
-                    "Resources/stubs"
+                "exclude-from-classmap": [
+                    "/Tests/"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -6154,26 +5283,18 @@
             ],
             "authors": [
                 {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
                 },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony polyfill for intl's Normalizer class and related functions",
+            "description": "Symfony DomCrawler Component",
             "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "intl",
-                "normalizer",
-                "polyfill",
-                "portable",
-                "shim"
-            ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-intl-normalizer/tree/v1.23.0"
+                "source": "https://github.com/symfony/dom-crawler/tree/3.4"
             },
             "funding": [
                 {
@@ -6189,44 +5310,52 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-02-19T12:13:01+00:00"
+            "time": "2020-09-02T16:06:40+00:00"
         },
         {
-            "name": "symfony/polyfill-php73",
-            "version": "v1.23.0",
+            "name": "symfony/event-dispatcher",
+            "version": "v3.4.45",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/polyfill-php73.git",
-                "reference": "fba8933c384d6476ab14fb7b8526e5287ca7e010"
+                "url": "https://github.com/symfony/event-dispatcher.git",
+                "reference": "0bb9ea263b39fce3a12ac9f78ef576bdd80dacb8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php73/zipball/fba8933c384d6476ab14fb7b8526e5287ca7e010",
-                "reference": "fba8933c384d6476ab14fb7b8526e5287ca7e010",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/0bb9ea263b39fce3a12ac9f78ef576bdd80dacb8",
+                "reference": "0bb9ea263b39fce3a12ac9f78ef576bdd80dacb8",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.1"
+                "php": "^5.5.9|>=7.0.8"
+            },
+            "conflict": {
+                "symfony/dependency-injection": "<3.3"
+            },
+            "require-dev": {
+                "psr/log": "~1.0",
+                "symfony/config": "~2.8|~3.0|~4.0",
+                "symfony/debug": "~3.4|~4.4",
+                "symfony/dependency-injection": "~3.3|~4.0",
+                "symfony/expression-language": "~2.8|~3.0|~4.0",
+                "symfony/stopwatch": "~2.8|~3.0|~4.0"
+            },
+            "suggest": {
+                "symfony/dependency-injection": "",
+                "symfony/http-kernel": ""
             },
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             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.23-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Symfony\\Polyfill\\Php73\\": ""
+                    "Symfony\\Component\\EventDispatcher\\": ""
                 },
-                "files": [
-                    "bootstrap.php"
-                ],
-                "classmap": [
-                    "Resources/stubs"
+                "exclude-from-classmap": [
+                    "/Tests/"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -6235,24 +5364,18 @@
             ],
             "authors": [
                 {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
                 },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony polyfill backporting some PHP 7.3+ features to lower PHP versions",
+            "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "polyfill",
-                "portable",
-                "shim"
-            ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-php73/tree/v1.23.0"
+                "source": "https://github.com/symfony/event-dispatcher/tree/v3.4.45"
             },
             "funding": [
                 {
@@ -6268,123 +5391,35 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-02-19T12:13:01+00:00"
+            "time": "2020-09-18T12:06:50+00:00"
         },
         {
-            "name": "symfony/service-contracts",
-            "version": "v2.2.0",
+            "name": "symfony/finder",
+            "version": "v3.4.45",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/service-contracts.git",
-                "reference": "d15da7ba4957ffb8f1747218be9e1a121fd298a1"
+                "url": "https://github.com/symfony/finder.git",
+                "reference": "52140652ed31cee3dabd0c481b5577201fa769b4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/d15da7ba4957ffb8f1747218be9e1a121fd298a1",
-                "reference": "d15da7ba4957ffb8f1747218be9e1a121fd298a1",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/52140652ed31cee3dabd0c481b5577201fa769b4",
+                "reference": "52140652ed31cee3dabd0c481b5577201fa769b4",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.2.5",
-                "psr/container": "^1.0"
-            },
-            "suggest": {
-                "symfony/service-implementation": ""
+                "php": "^5.5.9|>=7.0.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.2-dev"
-                },
-                "thanks": {
-                    "name": "symfony/contracts",
-                    "url": "https://github.com/symfony/contracts"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Contracts\\Service\\": ""
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Generic abstractions related to writing services",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "abstractions",
-                "contracts",
-                "decoupling",
-                "interfaces",
-                "interoperability",
-                "standards"
-            ],
-            "support": {
-                "source": "https://github.com/symfony/service-contracts/tree/master"
-            },
-            "funding": [
-                {
-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
+                    "dev-master": "3.4-dev"
                 }
-            ],
-            "time": "2020-09-07T11:33:47+00:00"
-        },
-        {
-            "name": "symfony/string",
-            "version": "v5.3.2",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/string.git",
-                "reference": "0732e97e41c0a590f77e231afc16a327375d50b0"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/string/zipball/0732e97e41c0a590f77e231afc16a327375d50b0",
-                "reference": "0732e97e41c0a590f77e231afc16a327375d50b0",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=7.2.5",
-                "symfony/polyfill-ctype": "~1.8",
-                "symfony/polyfill-intl-grapheme": "~1.0",
-                "symfony/polyfill-intl-normalizer": "~1.0",
-                "symfony/polyfill-mbstring": "~1.0",
-                "symfony/polyfill-php80": "~1.15"
-            },
-            "require-dev": {
-                "symfony/error-handler": "^4.4|^5.0",
-                "symfony/http-client": "^4.4|^5.0",
-                "symfony/translation-contracts": "^1.1|^2",
-                "symfony/var-exporter": "^4.4|^5.0"
             },
-            "type": "library",
             "autoload": {
                 "psr-4": {
-                    "Symfony\\Component\\String\\": ""
+                    "Symfony\\Component\\Finder\\": ""
                 },
-                "files": [
-                    "Resources/functions.php"
-                ],
                 "exclude-from-classmap": [
                     "/Tests/"
                 ]
@@ -6395,26 +5430,18 @@
             ],
             "authors": [
                 {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
                 },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Provides an object-oriented API to strings and deals with bytes, UTF-8 code points and grapheme clusters in a unified way",
+            "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "keywords": [
-                "grapheme",
-                "i18n",
-                "string",
-                "unicode",
-                "utf-8",
-                "utf8"
-            ],
             "support": {
-                "source": "https://github.com/symfony/string/tree/v5.3.2"
+                "source": "https://github.com/symfony/finder/tree/v3.4.45"
             },
             "funding": [
                 {
@@ -6430,27 +5457,27 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-06-06T09:51:56+00:00"
+            "time": "2020-09-02T16:06:40+00:00"
         },
         {
             "name": "theseer/tokenizer",
-            "version": "1.2.0",
+            "version": "1.1.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/theseer/tokenizer.git",
-                "reference": "75a63c33a8577608444246075ea0af0d052e452a"
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/75a63c33a8577608444246075ea0af0d052e452a",
-                "reference": "75a63c33a8577608444246075ea0af0d052e452a",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
                 "shasum": ""
             },
             "require": {
                 "ext-dom": "*",
                 "ext-tokenizer": "*",
                 "ext-xmlwriter": "*",
-                "php": "^7.2 || ^8.0"
+                "php": "^7.0"
             },
             "type": "library",
             "autoload": {
@@ -6474,45 +5501,34 @@
                 "issues": "https://github.com/theseer/tokenizer/issues",
                 "source": "https://github.com/theseer/tokenizer/tree/master"
             },
-            "funding": [
-                {
-                    "url": "https://github.com/theseer",
-                    "type": "github"
-                }
-            ],
-            "time": "2020-07-12T23:59:07+00:00"
+            "time": "2019-06-13T22:48:21+00:00"
         },
         {
             "name": "webmozart/assert",
-            "version": "1.10.0",
+            "version": "1.9.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozarts/assert.git",
-                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25"
+                "reference": "bafc69caeb4d49c39fd0779086c03a3738cbb389"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozarts/assert/zipball/6964c76c7804814a842473e0c8fd15bab0f18e25",
-                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/bafc69caeb4d49c39fd0779086c03a3738cbb389",
+                "reference": "bafc69caeb4d49c39fd0779086c03a3738cbb389",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2 || ^8.0",
+                "php": "^5.3.3 || ^7.0 || ^8.0",
                 "symfony/polyfill-ctype": "^1.8"
             },
             "conflict": {
                 "phpstan/phpstan": "<0.12.20",
-                "vimeo/psalm": "<4.6.1 || 4.6.2"
+                "vimeo/psalm": "<3.9.1"
             },
             "require-dev": {
-                "phpunit/phpunit": "^8.5.13"
+                "phpunit/phpunit": "^4.8.36 || ^7.5.13"
             },
             "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.10-dev"
-                }
-            },
             "autoload": {
                 "psr-4": {
                     "Webmozart\\Assert\\": "src/"
@@ -6536,39 +5552,33 @@
             ],
             "support": {
                 "issues": "https://github.com/webmozarts/assert/issues",
-                "source": "https://github.com/webmozarts/assert/tree/1.10.0"
+                "source": "https://github.com/webmozarts/assert/tree/1.9.1"
             },
-            "time": "2021-03-09T10:59:23+00:00"
+            "time": "2020-07-08T17:02:28+00:00"
         },
         {
             "name": "woohoolabs/yang",
-            "version": "2.3.2",
+            "version": "0.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/woohoolabs/yang.git",
-                "reference": "da65122971fa6add83751497ec76af1fb6cccf77"
+                "reference": "00dc9820d48780364cd214537604b032d751a781"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/woohoolabs/yang/zipball/da65122971fa6add83751497ec76af1fb6cccf77",
-                "reference": "da65122971fa6add83751497ec76af1fb6cccf77",
+                "url": "https://api.github.com/repos/woohoolabs/yang/zipball/00dc9820d48780364cd214537604b032d751a781",
+                "reference": "00dc9820d48780364cd214537604b032d751a781",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2.0||^8.0.0",
-                "php-http/httplug": "^1.0.0|^2.0.0",
-                "psr/http-message-implementation": "^1.0.0"
+                "php": "^5.6.0||^7.0.0",
+                "php-http/client-implementation": "^1.0.0",
+                "php-http/httplug": "^1.0.0"
             },
             "require-dev": {
-                "guzzlehttp/psr7": "^1.4.0",
-                "php-http/guzzle6-adapter": "^2.0.0",
-                "phpstan/phpstan": "^0.12.0",
-                "phpstan/phpstan-phpunit": "^0.12.0",
-                "phpstan/phpstan-strict-rules": "^0.12.0",
-                "phpunit/phpunit": "^7.0.0||^8.2.0||^9.0.0",
-                "squizlabs/php_codesniffer": "^3.5.1",
-                "woohoolabs/coding-standard": "^1.0.0",
-                "woohoolabs/releaser": "^1.1.0"
+                "php-http/guzzle6-adapter": "^1.1.0",
+                "phpunit/phpunit": "^5.4.0",
+                "squizlabs/php_codesniffer": "^2.3.1"
             },
             "suggest": {
                 "php-http/guzzle6-adapter": "Allows to use Guzzle 6 as the HTTP client implementation"
@@ -6590,18 +5600,18 @@
                 }
             ],
             "description": "Woohoo Labs. Yang",
+            "homepage": "http://yang.woohoolabs.com",
             "keywords": [
                 "Woohoo Labs.",
                 "Yang",
                 "json api",
-                "psr-18",
                 "psr-7"
             ],
             "support": {
                 "issues": "https://github.com/woohoolabs/yang/issues",
                 "source": "https://github.com/woohoolabs/yang"
             },
-            "time": "2020-11-15T08:55:55+00:00"
+            "time": "2016-12-21T20:37:46+00:00"
         }
     ],
     "aliases": [],
diff --git a/db/migrations/5.1.13_add_twillo_support.php b/db/migrations/5.1.13_add_twillo_support.php
new file mode 100644
index 0000000..0a65ddf
--- /dev/null
+++ b/db/migrations/5.1.13_add_twillo_support.php
@@ -0,0 +1,164 @@
+<?php
+
+class AddTwilloSupport extends Migration
+{
+    public function description()
+    {
+        return "Adds Twillo to OER Campus.";
+    }
+
+    public function up()
+    {
+        DBManager::get()->exec("
+            ALTER TABLE `oer_material`
+                ADD COLUMN `uri` varchar(1000) NOT NULL DEFAULT '' AFTER `license_identifier`,
+                ADD COLUMN `uri_hash` char(32) NOT NULL DEFAULT '' AFTER `uri`,
+                ADD COLUMN `published_id_on_twillo` varchar(50) DEFAULT NULL AFTER `uri_hash`,
+                ADD KEY `uri_hash` (`uri_hash`)
+        ");
+        $statement = DBManager::get()->prepare("
+            SELECT *
+            FROM `oer_material`
+            WHERE `host_id` IS NULL
+        ");
+        $statement->execute();
+        $update_uri = DBManager::get()->prepare("
+            UPDATE `oer_material`
+            SET `uri` = :uri,
+                `uri_hash` = :uri_hash
+            WHERE `material_id` = :material_id
+        ");
+        while ($material_data = $statement->fetch()) {
+            $uri = ($GLOBALS['OER_PREFERRED_URI'] ?: $GLOBALS['ABSOLUTE_URI_STUDIP'])
+                . "dispatch.php/oer/market/details/"
+                . $material_data['material_id'];
+            $update_uri->execute([
+                'uri' => $uri,
+                'uri_hash' => md5($uri),
+                'material_id' => $material_data['material_id']
+            ]);
+        }
+        DBManager::get()->exec("
+            ALTER TABLE `licenses`
+                ADD COLUMN `twillo_licensekey` varchar(16) DEFAULT NULL AFTER `description`,
+                ADD COLUMN `twillo_cclicenseversion` varchar(8) DEFAULT NULL AFTER `twillo_licensekey`
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY',
+                `twillo_cclicenseversion` = '1.0'
+            WHERE `identifier` = 'CC-BY-1.0'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY',
+                `twillo_cclicenseversion` = '2.0'
+            WHERE `identifier` = 'CC-BY-2.0'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY',
+                `twillo_cclicenseversion` = '2.5'
+            WHERE `identifier` = 'CC-BY-2.5'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY',
+                `twillo_cclicenseversion` = '3.0'
+            WHERE `identifier` = 'CC-BY-3.0'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY',
+                `twillo_cclicenseversion` = '4.0'
+            WHERE `identifier` = 'CC-BY-4.0'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY_SA',
+                `twillo_cclicenseversion` = '1.0'
+            WHERE `identifier` = 'CC-BY-SA-1.0'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY_SA',
+                `twillo_cclicenseversion` = '2.0'
+            WHERE `identifier` = 'CC-BY-SA-2.0'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY_SA',
+                `twillo_cclicenseversion` = '2.5'
+            WHERE `identifier` = 'CC-BY-SA-2.5'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY_SA',
+                `twillo_cclicenseversion` = '3.0'
+            WHERE `identifier` = 'CC-BY-SA-3.0'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_BY_SA',
+                `twillo_cclicenseversion` = '4.0'
+            WHERE `identifier` = 'CC-BY-SA-4.0'
+        ");
+        DBManager::get()->exec("
+            UPDATE `licenses`
+            SET `twillo_licensekey` = 'CC_0',
+                `twillo_cclicenseversion` = '1.0'
+            WHERE `identifier` = 'CC0-1.0'
+        ");
+
+        DBManager::get()->exec(
+            "INSERT IGNORE INTO `config`
+            (`field`, `value`, `type`, `range`,
+            `section`,
+            `mkdate`, `chdate`,
+            `description`)
+            VALUES
+            ('OERCAMPUS_ENABLE_TWILLO', '0', 'boolean', 'global',
+            'OERCampus', UNIX_TIMESTAMP(), UNIX_TIMESTAMP(),
+            'Soll der Upload zu twillo.de vom OERCampus möglich sein? Folgen Sie dazu der Installationsanleitung.')"
+        );
+        DBManager::get()->exec(
+            "INSERT IGNORE INTO `config`
+            (`field`, `value`, `type`, `range`,
+            `section`,
+            `mkdate`, `chdate`,
+            `description`)
+            VALUES
+            ('OERCAMPUS_TWILLO_APPID', '', 'string', 'global',
+            'OERCampus', UNIX_TIMESTAMP(), UNIX_TIMESTAMP(),
+            'Welche ID hat dieses Stud.IP, wenn es mit twillo.de kommuniziert?')"
+        );
+        DBManager::get()->exec(
+            "INSERT IGNORE INTO `config`
+            (`field`, `value`, `type`, `range`,
+            `section`,
+            `mkdate`, `chdate`,
+            `description`)
+            VALUES
+            ('OERCAMPUS_TWILLO_DFNAAIID_DATAFIELD', '', 'string', 'global',
+            'OERCampus', UNIX_TIMESTAMP(), UNIX_TIMESTAMP(),
+            'Welches Datenfeld eines Nutzers trägt dessen DFN-AAI-ID?')"
+        );
+
+        SimpleORMap::expireTableScheme();
+    }
+
+    public function down()
+    {
+        DBManager::get()->exec("
+            ALTER TABLE `licenses`
+                DROP COLUMN `twillo_licensekey`,
+                DROP COLUMN `twillo_cclicenseversion`
+        ");
+        DBManager::get()->exec("
+            ALTER TABLE `oer_material`
+                DROP COLUMN `uri`,
+                DROP COLUMN `uri_hash`
+        ");
+    }
+}
+
diff --git a/lib/bootstrap-autoload.php b/lib/bootstrap-autoload.php
index 994a2bd..05d424a 100644
--- a/lib/bootstrap-autoload.php
+++ b/lib/bootstrap-autoload.php
@@ -100,3 +100,21 @@ StudipAutoloader::addClassLookup(
     ['xmlrpc_server'],
     'composer/phpxmlrpc/phpxmlrpc/lib/xmlrpcs.inc'
 );
+
+//Edu-Sharing helper classes for twillo connector
+StudipAutoloader::addClassLookup(
+    'EduSharingHelper',
+    'vendor/edu-sharing-plugin/edu-sharing-helper.php'
+);
+StudipAutoloader::addClassLookup(
+    'EduSharingHelperBase',
+    'vendor/edu-sharing-plugin/edu-sharing-helper-base.php'
+);
+StudipAutoloader::addClassLookup(
+    'EduSharingAuthHelper',
+    'vendor/edu-sharing-plugin/edu-sharing-auth-helper.php'
+);
+StudipAutoloader::addClassLookup(
+    'EduSharingNodeHelper',
+    'vendor/edu-sharing-plugin/edu-sharing-node-helper.php'
+);
diff --git a/lib/classes/TwilloConnector.php b/lib/classes/TwilloConnector.php
new file mode 100644
index 0000000..e91d912
--- /dev/null
+++ b/lib/classes/TwilloConnector.php
@@ -0,0 +1,274 @@
+<?php
+
+/**
+ * Class TwilloConnector manages all transactions between Stud.IP and twillo.de.
+ */
+class TwilloConnector
+{
+    /**
+     * Caches the edusharing EDU-ticket for the same request.
+     * @var null|string
+     */
+    static protected $ticket = null;
+
+    /**
+     * Returns the DFN-AAI-ID for the given user. This ID must be the content of a datafield with the
+     * datafield_id in the global config OERCAMPUS_TWILLO_DFNAAIID_DATAFIELD. If either this config or
+     * the content of the datafield is null, this method returns false;
+     * @param null $user_id
+     * @return false|string
+     */
+    public static function getTwilloUserID($user_id = null)
+    {
+        $user_id || $user_id = User::findCurrent()->id;
+        if (Config::get()->OERCAMPUS_TWILLO_DFNAAIID_DATAFIELD) {
+            $entry = DatafieldEntryModel::findOneBySQL('`datafield_id` = :datafield_id AND `range_id` = :user_id ', [
+                'datafield_id' => Config::get()->OERCAMPUS_TWILLO_DFNAAIID_DATAFIELD,
+                'user_id' => $user_id
+            ]);
+            if ($entry) {
+                return $entry['content'] ?: false;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Transfers the material to twillo.
+     * @param OERMaterial $material : the material to transfer
+     * @param null|string $user_id : The user in whose filesystem of twillo the material should be uploaded to.
+     * @return bool|string : true on success, on failure a text-string as error-message
+     * @throws Exception
+     */
+    public static function uploadMaterial(OERMaterial $material, $user_id = null)
+    {
+        $user_id || $user_id = User::findCurrent()->id;
+        $base = new EduSharingHelperBase(
+            'https://www.twillo.de/edu-sharing',
+            file_get_contents($GLOBALS['STUDIP_BASE_PATH']."/config/twillo-private.key"),
+            Config::get()->OERCAMPUS_TWILLO_APPID // 'data-quest-Test'
+        );
+        $authHelper = new EduSharingAuthHelper($base);
+        if (!static::$ticket) {
+            static::$ticket = $authHelper->getTicketForUser(TwilloConnector::getTwilloUserID($user_id));
+        }
+
+        //the use this edu-ticket to authenticate.
+
+        if (!$material['published_id_on_twillo']) { //Anlegen des materials als Dateihülle:
+            //frage, ob es einen Ordner gibt:
+            $header = [];
+            $header[] = "Authorization: EDU-TICKET ".static::$ticket;
+            $header[] = "Content-Type: application/json";
+            $header[] = "Accept: application/json";
+
+            $cr = curl_init();
+            curl_setopt($cr, CURLOPT_URL, 'https://www.twillo.de/edu-sharing/rest/node/v1/nodes/-home-/-userhome-/children');
+            curl_setopt($cr, CURLOPT_HTTPHEADER, $header);
+            curl_setopt($cr, CURLOPT_RETURNTRANSFER, 1);
+            curl_setopt($cr, CURLOPT_SSL_VERIFYPEER, false);
+            curl_setopt($cr, CURLOPT_SSL_VERIFYHOST, false);
+            $body = curl_exec($cr);
+            $error = curl_error($cr);
+            if ($error) {
+                return $error;
+            }
+            curl_close($cr);
+            $body = json_decode($body, true);
+
+
+            $subfolder_id = null;
+
+            foreach ($body['nodes'] as $nodedata) {
+                if ($nodedata['name'] === "OERCampusPublications") {
+                    $subfolder_id = $nodedata['ref']['id'];
+                    break;
+                }
+            }
+
+            if (!$subfolder_id) {
+                //erstelle den Ordner, wenn es ihn nicht gibt:
+                $header = [];
+                $header[] = "Authorization: EDU-TICKET ".static::$ticket;
+                $header[] = "Content-Type: application/json";
+                $header[] = "Accept: application/json";
+
+                $cr = curl_init();
+                curl_setopt($cr, CURLOPT_POST, 1);
+                curl_setopt($cr, CURLOPT_URL, 'https://www.twillo.de/edu-sharing/rest/node/v1/nodes/-home-/-userhome-/children?type=cm%3Afolder&renameIfExists=false&assocType=&versionComment=');
+                curl_setopt($cr, CURLOPT_HTTPHEADER, $header);
+                curl_setopt($cr, CURLOPT_RETURNTRANSFER, 1);
+                curl_setopt($cr, CURLOPT_SSL_VERIFYPEER, false);
+                curl_setopt($cr, CURLOPT_SSL_VERIFYHOST, false);
+                $postbody = json_encode([
+                    'cm:edu_forcemetadataset' => ['true'],
+                    'cm:edu_metadataset' => ['mds'],
+                    'cm:name' => ['OERCampusPublications']
+                ]);
+                curl_setopt($cr, CURLOPT_POSTFIELDS, $postbody);
+                $body = curl_exec($cr);
+                curl_close($cr);
+                $body = json_decode($body, true);
+
+                $subfolder_id = $body['node']['ref']['id'];
+            }
+
+            //Erstelle die Datei als Link:
+            $header = [];
+            $header[] = "Authorization: EDU-TICKET ".static::$ticket;
+            $header[] = "Content-Type: application/json";
+            $header[] = "Accept: application/json";
+
+            $cr = curl_init();
+            curl_setopt($cr, CURLOPT_POST, 1);
+            curl_setopt($cr, CURLOPT_URL, 'https://www.twillo.de/edu-sharing/rest/node/v1/nodes/-home-/'.$subfolder_id.'/children?type=ccm%3Aio&renameIfExists=true');
+            curl_setopt($cr, CURLOPT_HTTPHEADER, $header);
+            curl_setopt($cr, CURLOPT_RETURNTRANSFER, 1);
+            curl_setopt($cr, CURLOPT_SSL_VERIFYPEER, false);
+            curl_setopt($cr, CURLOPT_SSL_VERIFYHOST, false);
+            $postbody = json_encode([
+                'ccm:wwwurl' => [$material->getDownloadUrl()],
+                'ccm:linktype' => ["USER_GENERATED"],
+                //'cm:name' => [$material['name']]
+            ]);
+            curl_setopt($cr, CURLOPT_POSTFIELDS, $postbody);
+            $body = curl_exec($cr);
+            curl_close($cr);
+
+            $body = json_decode($body, true);
+            $material['published_id_on_twillo'] = $body['node']['ref']['id'];
+            $material->store();
+        }
+
+
+        $header = [];
+        $header[] = "Authorization: EDU-TICKET ".static::$ticket;
+        $header[] = "Content-Type: application/json";
+        $header[] = "Accept: application/json";
+
+        $cr = curl_init();
+        curl_setopt($cr, CURLOPT_POST, 1);
+        curl_setopt($cr, CURLOPT_URL, 'https://www.twillo.de/edu-sharing/rest/node/v1/nodes/-home-/'.$material['published_id_on_twillo'].'/metadata?versionComment=METADATA_UPDATE');
+        curl_setopt($cr, CURLOPT_HTTPHEADER, $header);
+        curl_setopt($cr, CURLOPT_RETURNTRANSFER, 1);
+        curl_setopt($cr, CURLOPT_SSL_VERIFYPEER, false);
+        curl_setopt($cr, CURLOPT_SSL_VERIFYHOST, false);
+        $old_base = URLHelper::setBaseURL($GLOBALS['ABSOLUTE_URI_STUDIP']);
+        $permalink = URLHelper::getLink("dispatch.php/oer/market/details/".$material->getId());
+        URLHelper::setBaseURL($old_base);
+        $topics = array_map(function ($t) { return $t['name'];}, $material->getTopics());
+        $postbody = json_encode([
+            'ccm:original' => [""],
+            'cm:created' => [(string) $material['mkdate']],
+            'virtual:commentcount' => ["0"],
+            'ccm:metadatacontributer_creatorVCARD_ORG' => [""],
+            'cclom:version' => ["1.0"],
+            'virtual:usagecount' => ["0"],
+            'sys:node-uuid' => [$material['published_id_on_twillo']],
+            'virtual:childobjectcount' => ["0"],
+            'cclom:title' => [$material['name']],
+            'ccm:linktype' => ['USER_GENERATED'],
+            'ccm:lifecyclecontributer_authorVCARD_SURNAME' => ["Nachname"],
+            'ccm:lifecyclecontributer_authorVCARD_URL' => [""],
+            'ccm:lifecyclecontributer_authorVCARD_COUNTRY' => [''],
+            'ccm:lifecyclecontributer_author' => ['BEGIN:VCARD\nN:Nachname;Vorname\nFN:Vorname Nachname\nVERSION:3.0\nEND:VCARD'],
+            'ccm:lifecyclecontributer_authorVCARD_REGION' => [''],
+            'ccm:lifecyclecontributer_authorVCARD_ORG' => [""],
+            'ccm:lifecyclecontributer_authorVCARD_TITLE' => [""],
+            'ccm:lifecyclecontributer_authorVCARD_STREET' => [''],
+            'ccm:lifecyclecontributer_authorVCARD_PLZ' => [''],
+            'ccm:lifecyclecontributer_authorVCARD_GIVENNAME' => ['Vorname'],
+            'ccm:lifecyclecontributer_authorVCARD_CITY' => [''],
+            'ccm:lifecyclecontributer_authorFN' => ["Vorname Nachname"],
+            'ccm:lifecyclecontributer_authorVCARD_EMAIL' => [""],
+            'ccm:lifecyclecontributer_authorVCARD_TEL' => [''],
+            'ccm:metadatacontributer_creatorVCARD_CITY' => [''],
+            'ccm:metadatacontributer_creatorVCARD_URL' => [''],
+            'ccm:ccm:metadatacontributer_creatorVCARD_REGION' => [''],
+            'ccm:metadatacontributer_creatorVCARD_PLZ' => [''],
+            'ccm:metadatacontributer_creator' => ['BEGIN:VCARD\nVERSION:3.0\nN:OER-Campus, Stud.IP\nFN:Stud.IP\nORG:\nURL:\nTITLE:\nTEL;TYPE=WORK,VOICE:\nADR;TYPE=intl,postal,parcel,work:;;;;;;\nEMAIL;TYPE=PREF,INTERNET:\nEND:VCARD'],
+            'ccm:metadatacontributer_creatorVCARD_TEL' => [''],
+            'ccm:metadatacontributer_creatorVCARD_COUNTRY' => [''],
+            'ccm:metadatacontributer_creatorVCARD_EMAIL' => [''],
+            'ccm:metadatacontributer_creatorVCARD_TITLE' => [''],
+            'ccm:metadatacontributer_creatorVCARD_GIVENNAME' => ['open'],
+            'ccm:metadatacontributer_creatorVCARD_STREET' => [''],
+            'ccm:metadatacontributer_creatorVCARD_SURNAME' => ["Stud.IP"],
+            'ccm:metadatacontributer_creatorFN' => ["open cast"],
+            'sys:store-protocol' => ['workspace'],
+            'sys:store-identifier' => ['SpacesStore'],
+            'ccm:version_comment' => ['METADATA_UPDATE'],
+            'ccm:educationallearningresourcetype' => ['exercise'], //?
+            'ccm:create_version' => ['true'],
+            'cm:modifiedISO8601' => [date("/r", $material['chdate'])],
+            'ccm:author_freetext' => [''],
+            'sys:node-dbid' => ['836'],
+            'ccm:wwwurl' => [$material->getDownloadUrl()],
+            'cm:edu_metadataset' => ['mds'],
+            'cm:creator' => ['Stud.IP OER-Campus'],
+            'cm:autoVersion' => ['false'],
+            'virtual:permalink' => [$permalink],
+            'cm:versionLabel' => ['1.0'],
+            'cm:versionable' => ['false'],
+            'cm:created_LONG' => [(string) $material['mkdate']],
+            'virtual:primaryparent_nodeid' => [$subfolder_id],
+            'cm:createdISO8601' => ['2020-11-20T14:00:17.805Z'],
+            'ccm:ph_action' => ['PERMISSION_ADD'],
+            'cclom:general_description' => [$material['description']],
+            'cm:modified' => [(string) $material['chdate']],
+            'cm:edu_forcemetadataset' => ['false'],
+            'cm:modifier' => ['Stud.IP OER-Campus'],
+            'ccm:educationallearningresourcetype_DISPLAYNAME' => ['Übung'],
+            'cm:autoVersionOnUpdateProps' => ['false'],
+            "cclom:location" => ["ccrep://repo/".$material['published_id_on_twillo']],
+            'ccm:educontextname' => ["default"],
+            'cm:modified_LONG' => [(string) $material['chdate']],
+            'ccm:questionsallowed' => ["true"],
+            'cm:automaticUpdate' => ["true"],
+            'cm:name' => [$material['filename']],
+            'cm:initialVersion' => ["false"],
+            'cclom:general_keyword' => $topics,
+            'ccm:commonlicense_key' => [$material->license['twillo_licensekey']],
+            'ccm:commonlicense_cc_version' => [$material->license['twillo_cclicenseversion']],
+            'virtual:licenseicon' => [''],
+            'virtual:licenseurl' => [''],
+        ]);
+        curl_setopt($cr, CURLOPT_POSTFIELDS, $postbody);
+        curl_exec($cr);
+        $error = curl_error($cr);
+        curl_close($cr);
+        if ($error) {
+            return $error;
+        }
+        return true;
+    }
+
+    public static function deleteFromTwillo($oer_id, $user_id = null)
+    {
+        $user_id || $user_id = User::findCurrent()->id;
+
+        $base = new EduSharingHelperBase(
+            'https://www.twillo.de/edu-sharing',
+            file_get_contents($GLOBALS['STUDIP_BASE_PATH']."/config/twillo-private.key"),
+            Config::get()->OERCAMPUS_TWILLO_APPID // 'data-quest-Test'
+        );
+        $authHelper = new EduSharingAuthHelper($base);
+        if (!static::$ticket) {
+            static::$ticket = $authHelper->getTicketForUser(TwilloConnector::getTwilloUserID($user_id));
+        }
+
+        $header = [];
+        $header[] = "Authorization: EDU-TICKET " . static::$ticket;
+        $header[] = "Content-Type: application/json";
+        $header[] = "Accept: application/json";
+
+        $cr = curl_init();
+        curl_setopt($cr, CURLOPT_CUSTOMREQUEST, "DELETE");
+        curl_setopt($cr, CURLOPT_URL, 'https://www.twillo.de/edu-sharing/rest/node/v1/nodes/-home-/'.$oer_id);
+        curl_setopt($cr, CURLOPT_HTTPHEADER, $header);
+        curl_setopt($cr, CURLOPT_SSL_VERIFYPEER, false);
+        curl_setopt($cr, CURLOPT_SSL_VERIFYHOST, false);
+        curl_exec($cr);
+        curl_close($cr);
+    }
+}
diff --git a/lib/models/OERMaterial.php b/lib/models/OERMaterial.php
index 65acaa4..d718d60 100755
--- a/lib/models/OERMaterial.php
+++ b/lib/models/OERMaterial.php
@@ -23,6 +23,7 @@ class OERMaterial extends SimpleORMap
             'foreign_key' => 'license_identifier'
         ];
         $config['serialized_fields']['structure'] = 'JSONArrayObject';
+        $config['registered_callbacks']['before_store'][] = "cbHashURI";
         $config['registered_callbacks']['before_delete'][] = "cbDeleteFile";
         parent::configure($config);
     }
@@ -181,6 +182,11 @@ class OERMaterial extends SimpleORMap
         @unlink($this->getFilePath());
     }
 
+    public function cbHashURI()
+    {
+        $this['uri_hash'] = md5($this['uri']);
+    }
+
     public function getTopics()
     {
         $statement = DBManager::get()->prepare("
@@ -235,7 +241,7 @@ class OERMaterial extends SimpleORMap
         $base = URLHelper::setBaseURL($GLOBALS['ABSOLUTE_URI_STUDIP']);
         $url = $this['host_id']
             ? $this->host->url."download/".$this['foreign_material_id']
-            : URLHelper::getURL("dispatch.php/oer/market/download/".$this->getId());
+            : URLHelper::getURL("dispatch.php/oer/endpoints/download/".$this->getId());
         URLHelper::setBaseURL($base);
         return $url;
     }
@@ -373,6 +379,25 @@ class OERMaterial extends SimpleORMap
         }
     }
 
+    /**
+     * Uploads this material to twillo.de. This is not actually an upload but rather a link with metadata.
+     * @return bool|string : true on success, on failure a text-string as error-message
+     */
+    public function uploadToTwillo()
+    {
+        return TwilloConnector::uploadMaterial($this);
+    }
+
+    /**
+     * Removes this material from twillo.de if able.
+     */
+    public function deleteFromTwillo()
+    {
+        TwilloConnector::deleteFromTwillo($this['published_id_on_twillo']);
+        $this['published_id_on_twillo'] = null;
+        $this->store();
+    }
+
     public function fetchData()
     {
         if ($this['host_id']) {
diff --git a/vendor/edu-sharing-plugin/edu-sharing-auth-helper.php b/vendor/edu-sharing-plugin/edu-sharing-auth-helper.php
new file mode 100644
index 0000000..071c0c6
--- /dev/null
+++ b/vendor/edu-sharing-plugin/edu-sharing-auth-helper.php
@@ -0,0 +1,101 @@
+<?php
+require_once "edu-sharing-helper-abstract.php";
+
+class EduSharingAuthHelper extends EduSharingHelperAbstract  {
+
+    /**
+     * Gets detailed information about a ticket
+     * Will throw an exception if the given ticket is not valid anymore
+     * @param string $ticket
+     * The ticket, obtained by @getTicketForUser
+     * @return array
+     * Detailed information about the current session
+     * @throws Exception
+     * Thrown if the ticket is not valid anymore
+     */
+    public function getTicketAuthenticationInfo(string $ticket) {
+        $curl = curl_init($this->base->baseUrl . '/rest/authentication/v1/validateSession');
+        curl_setopt_array($curl, [
+            CURLOPT_HTTPHEADER => [
+                $this->getRESTAuthenticationHeader($ticket),
+                'Accept: application/json',
+                'Content-Type: application/json',
+            ],
+            CURLOPT_RETURNTRANSFER => 1,
+            CURLOPT_CONNECTTIMEOUT => 5,
+            CURLOPT_TIMEOUT => 5
+        ]);
+        $data = json_decode(curl_exec($curl), true);
+        curl_close($curl);
+        if ( is_null( $data ) ) {
+            throw new Exception( 'No answer from repository. Possibly a timeout while trying to connect' );
+        }
+        if($data['statusCode'] !== 'OK') {
+            throw new Exception('The given ticket is not valid anymore');
+        }
+        return $data;
+    }
+
+    /**
+     * Fetches the edu-sharing ticket for a given username
+     * @param string $username
+     * The username you want to generate a ticket for
+     * @return string
+     * The ticket, which you can use as an authentication header, see @getRESTAuthenticationHeader
+     * @throws Exception
+     */
+    public function getTicketForUser(string $username, $bodyparams = null) {
+        if ($bodyparams === null) {
+            $bodyparams = [
+                "primaryAffiliation" => "employee",
+                "skills" => [
+                    "string"
+                ],
+                "types" => [
+                    "string"
+                ],
+                "extendedAttributes" => [
+                    'affiliation' => ["employee"]
+                ],
+                "vcard" => "string",
+                "firstName" => User::findCurrent()->vorname,
+                "lastName" => User::findCurrent()->nachname,
+                "email" => User::findCurrent()->email,
+                "avatar" => "string",
+                "about" => "string"
+            ];
+        }
+        $curl = curl_init($this->base->baseUrl . '/rest/authentication/v1/appauth/' . rawurlencode($username));
+        curl_setopt_array($curl, [
+            CURLOPT_POST => 1,
+            CURLOPT_FAILONERROR => false,
+            CURLOPT_RETURNTRANSFER => 1,
+            CURLOPT_HTTPHEADER => $this->getSignatureHeaders($username),
+            CURLOPT_CONNECTTIMEOUT => 5,
+            CURLOPT_TIMEOUT => 5
+        ]);
+        curl_setopt(
+            $curl,
+            CURLOPT_POSTFIELDS,
+            is_array($bodyparams) ? json_encode($bodyparams) : (string) $bodyparams
+        );
+
+        $output = curl_exec($curl);
+        $data = json_decode($output, true);
+
+        $err     = curl_errno( $curl );
+        $info = curl_getinfo($curl);
+        curl_close($curl);
+        if ($err === 0 && $info["http_code"] === 200 && $data['userId'] === $username) {
+            return $data['ticket'];
+        } else {
+            if ( is_null( $data ) ) {
+                $data = ['error' => $output];
+            }
+            throw new Exception(
+                'edu-sharing ticket could not be retrieved: HTTP-Code ' .
+                $info["http_code"] . ': ' . $data['error']
+            );
+        }
+    }
+}
diff --git a/vendor/edu-sharing-plugin/edu-sharing-helper-abstract.php b/vendor/edu-sharing-plugin/edu-sharing-helper-abstract.php
new file mode 100644
index 0000000..d531eec
--- /dev/null
+++ b/vendor/edu-sharing-plugin/edu-sharing-helper-abstract.php
@@ -0,0 +1,43 @@
+<?php
+
+abstract class EduSharingHelperAbstract {
+    protected $base;
+    public function __construct(
+        EduSharingHelperBase $base
+    ) {
+        $this->base = $base;
+    }
+
+    /**
+     * Generates the header to use for a given ticket to authenticate with any edu-sharing api endpoint
+     * @param string $ticket
+     * The ticket, obtained by @getTicketForUser
+     * @return string
+     */
+    public function getRESTAuthenticationHeader(string $ticket) {
+        return 'Authorization: EDU-TICKET ' . $ticket;
+    }
+
+
+    protected function getSignatureHeaders(
+        string $signString,
+        $accept = 'application/json',
+        $contentType = 'application/json'
+    ) {
+        $ts = time() * 1000;
+        $toSign = $this->base->appId . $signString . $ts;
+        $signature = $this->sign($toSign);
+        return [
+            'Accept: ' . $accept,
+            'Content-Type: ' . $contentType,
+            'X-Edu-App-Id: ' . $this->base->appId,
+            'X-Edu-App-Signed: ' . $toSign,
+            'X-Edu-App-Sig: ' . $signature,
+            'X-Edu-App-Ts: ' . $ts,
+        ];
+    }
+
+    protected function sign(string $toSign) {
+        return $this->base->sign($toSign);
+    }
+}
\ No newline at end of file
diff --git a/vendor/edu-sharing-plugin/edu-sharing-helper-base.php b/vendor/edu-sharing-plugin/edu-sharing-helper-base.php
new file mode 100644
index 0000000..ac3e2f6
--- /dev/null
+++ b/vendor/edu-sharing-plugin/edu-sharing-helper-base.php
@@ -0,0 +1,42 @@
+<?php
+
+class EduSharingHelperBase {
+    public $baseUrl;
+    public $privateKey;
+    public $appId;
+    public $language = 'de';
+
+    /**
+     * @param string $baseUrl
+     * The base url to your repository in the format "http://<host>/edu-sharing"
+     * @param string $privateKey
+     * Your app's private key. This must match the public key registered in the repo
+     * @param string $appId
+     * Your app id name (as registered in the edu-sharing repository)
+     */
+    public function __construct(
+        string $baseUrl,
+        string $privateKey,
+        string $appId
+    ) {
+        if(!preg_match('/^([a-z]|[A-Z]|[0-9]|[-_])+$/', $appId)) {
+            throw new Exception('The given app id contains invalid characters or symbols');
+        }
+        $this->baseUrl=$baseUrl;
+        $this->privateKey=$privateKey;
+        $this->appId=$appId;
+    }
+
+    public function setLanguage(string $language) {
+        $this->language = $language;
+    }
+
+    function sign(string $toSign) {
+        $pkeyid = openssl_get_privatekey($this->privateKey);
+        openssl_sign($toSign, $signature, $pkeyid);
+        $signature = base64_encode($signature);
+        openssl_free_key($pkeyid);
+        return $signature;
+    }
+
+}
\ No newline at end of file
diff --git a/vendor/edu-sharing-plugin/edu-sharing-helper.php b/vendor/edu-sharing-plugin/edu-sharing-helper.php
new file mode 100644
index 0000000..3c9d884
--- /dev/null
+++ b/vendor/edu-sharing-plugin/edu-sharing-helper.php
@@ -0,0 +1,47 @@
+<?php
+
+class EduSharingHelper {
+    /**
+     * generate a new key pair (private + public) to be registered in the edu-sharing repository
+     * Store the data somewhere in your application, e.g. database
+     * use the public key returned to register the application in edu-sharing
+     * NOTE: This function will fail on windows-based systems!
+     * @throws Exception
+     */
+    public static function generateKeyPair(
+    )
+    {
+        $res = openssl_pkey_new();
+        if(!$res) {
+            throw new Exception("No result from openssl_pkey_new. Please check your php installation");
+        }
+        openssl_pkey_export($res, $privatekey);
+        $publickey = openssl_pkey_get_details($res);
+        $publickey = $publickey["key"];
+        return [
+            "privatekey" => $privatekey,
+            "publickey" => $publickey
+        ];
+    }
+
+    /**
+     * Generates an edu-sharing compatible xml file for registering the application
+     * This is a very basic function and is only intended for demonstration or manual use. Data is not escaped!
+     */
+    public static function generateEduAppXMLData(string $appId, string $publickey, string $type = 'LMS', string $publicIP = '*') {
+        return '<?xml version="1.0" encoding="UTF-8"?>
+                <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
+                <properties>
+                    <entry key="appid">' . $appId . '</entry>
+                    <entry key="public_key">' . $publickey . '</entry>
+                    <entry key="type">' . $type . '</entry>
+                    <entry key="domain"></entry>
+                    <!-- in case of wildcard host: Replace this, if possible, with the public ip from your service --> 
+                    <entry key ="host">' . $publicIP . '</entry>
+                    <!-- must be true -->
+                    <entry key="trustedclient">true</entry> 
+                </properties>
+                ';
+    }
+
+}
\ No newline at end of file
diff --git a/vendor/edu-sharing-plugin/edu-sharing-node-helper.php b/vendor/edu-sharing-plugin/edu-sharing-node-helper.php
new file mode 100644
index 0000000..112d7d8
--- /dev/null
+++ b/vendor/edu-sharing-plugin/edu-sharing-node-helper.php
@@ -0,0 +1,175 @@
+<?php
+require_once "edu-sharing-helper-abstract.php";
+
+class DisplayMode {
+    const Inline = 'inline';
+    const Embed = 'embed';
+    const Dynamic = 'dynamic';
+}
+class Usage {
+    public $nodeId;
+    public $nodeVersion;
+    public $containerId;
+    public $resourceId;
+    public $usageId;
+
+    public function __construct($nodeId, $nodeVersion, $containerId, $resourceId, $usageId)
+    {
+        $this->nodeId = $nodeId;
+        $this->nodeVersion = $nodeVersion;
+        $this->containerId = $containerId;
+        $this->resourceId = $resourceId;
+        $this->usageId = $usageId;
+    }
+
+}
+class EduSharingNodeHelper extends EduSharingHelperAbstract  {
+    /**
+     * creates a usage for a given node
+     * The given usage can later be used to fetch this node REGARDLESS of the actual user
+     * The usage gives permanent access to this node and acts similar to a license
+     * In order to be able to create an usage for a node, the current user (provided via the ticket)
+     * MUST have CC_PUBLISH permissions on the given node id
+     * @param string $ticket
+     * A ticket with the user session who is creating this usage
+     * @param string $containerId
+     * A unique page / course id this usage refers to inside your system (e.g. a database id of the page you include the usage)
+     * @param string $resourceId
+     * The individual resource id on the current page or course this object refers to
+     * (you may enumerate or use unique UUID's)
+     * @param string $nodeId
+     * The edu-sharing node id the usage shall be created for
+     * @param string|null $nodeVersion
+     * Optional: The fixed version this usage should refer to
+     * If you leave it empty, the usage will always refer to the latest version of the node
+     * @return Usage
+     * An usage element you can use with @getNodeByUsage
+     * Keep all data of this object stored inside your system!
+     */
+    public function createUsage(
+        string $ticket,
+        string $containerId,
+        string $resourceId,
+        string $nodeId,
+        string $nodeVersion = null
+    ) {
+        $curl = curl_init($this->base->baseUrl . '/rest/usage/v1/usages/repository/-home-');
+        $headers = $this->getSignatureHeaders($ticket);
+        $headers[] = $this->getRESTAuthenticationHeader($ticket);
+        curl_setopt_array($curl, [
+            CURLOPT_FAILONERROR => false,
+            CURLOPT_POST => 1,
+            CURLOPT_POSTFIELDS => json_encode([
+                'appId' => $this->base->appId,
+                'courseId' => $containerId,
+                'resourceId' => $resourceId,
+                'nodeId' => $nodeId,
+                'nodeVersion' => $nodeVersion,
+            ]),
+            CURLOPT_RETURNTRANSFER => 1,
+            CURLOPT_HTTPHEADER => $headers
+        ]);
+        $data = json_decode(curl_exec($curl), true);
+        $err     = curl_errno( $curl );
+        $info = curl_getinfo($curl);
+        curl_close($curl);
+        if ($err === 0 && $info["http_code"] === 200) {
+            return new Usage(
+                $data['parentNodeId'],
+                $nodeVersion,
+                $containerId,
+                $resourceId,
+                $data['nodeId']
+            );
+        } else {
+            throw new Exception('creating usage failed ' .
+                $info["http_code"] . ': ' . $data['error'] . ' ' . $data['message']);
+        }
+
+    }
+
+    /**
+     * Loads the edu-sharing node refered by a given usage
+     * @param Usage $usage
+     * The usage, as previously returned by @createUsage
+     * @param string $displayMode
+     * The displayMode
+     * This will ONLY change the content representation inside the "detailsSnippet" return value
+     * @param array $renderingParams
+     * @return mixed
+     * Returns an object containing a "detailsSnippet" repesentation
+     * as well as the full node as provided by the REST API
+     * Please refer to the edu-sharing REST documentation for more details
+     * @throws Exception
+     */
+    public function getNodeByUsage(
+        Usage $usage,
+        $displayMode = DisplayMode::Inline,
+        array $renderingParams = null
+    )
+    {
+        $url = $this->base->baseUrl . '/rest/rendering/v1/details/-home-/' . rawurlencode($usage->nodeId);
+        $url .= '?displayMode=' . rawurlencode($displayMode);
+        if($usage->nodeVersion) {
+            $url .= '&version=' . rawurlencode($usage->nodeVersion);
+        }
+        $curl = curl_init($url);
+
+        $headers = $this->getSignatureHeaders($usage->usageId);
+        $headers[] = 'X-Edu-Usage-Node-Id: ' . $usage->nodeId;
+        $headers[] = 'X-Edu-Usage-Course-Id: ' . $usage->containerId;
+        $headers[] = 'X-Edu-Usage-Resource-Id: ' . $usage->resourceId;
+
+        curl_setopt_array($curl, [
+            CURLOPT_FAILONERROR => false,
+            CURLOPT_POST => 1,
+            CURLOPT_POSTFIELDS => json_encode($renderingParams),
+            CURLOPT_RETURNTRANSFER => 1,
+            CURLOPT_HTTPHEADER => $headers
+        ]);
+        $data = json_decode(curl_exec($curl), true);
+        $err     = curl_errno( $curl );
+        $info = curl_getinfo($curl);
+        if ($err === 0 && $info["http_code"] === 200) {
+            return $data;
+        } else {
+            throw new Exception('fetching node by usage failed ' .
+                $info["http_code"] . ': ' . $data['error'] . ' ' . $data['message']);
+        }
+    }
+
+    /**
+     * Deletes the given usage
+     * We trust that you've validated if the current user in your context is allowed to do so
+     * There is no restriction in deleting usages even from foreign users, as long as they were generated by your app
+     * Thus, this endpoint does not require any user ticket
+     * @param string $nodeId
+     * The edu-sharing node id this usage belongs to
+     * @param string $usageId
+     * The usage id
+     */
+    public function deleteUsage(
+        string $nodeId,
+        string $usageId
+    ) {
+        $curl = curl_init($this->base->baseUrl . '/rest/usage/v1/usages/node/' . rawurlencode($nodeId) . '/' . rawurlencode($usageId));
+        $headers = $this->getSignatureHeaders($nodeId.$usageId);
+        curl_setopt_array($curl, [
+            CURLOPT_FAILONERROR => false,
+            CURLOPT_CUSTOMREQUEST => 'DELETE',
+            CURLOPT_RETURNTRANSFER => 1,
+            CURLOPT_HTTPHEADER => $headers
+        ]);
+        $data = json_decode(curl_exec($curl), true);
+        $err     = curl_errno( $curl );
+        $info = curl_getinfo($curl);
+        curl_close($curl);
+        if ($err === 0 && $info["http_code"] === 200) {
+
+        } else {
+            throw new Exception('deleting usage failed ' .
+                $info["http_code"] . ': ' . $data['error'] . ' ' . $data['message']);
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/vendor/edu-sharing-plugin/example/example-api.php b/vendor/edu-sharing-plugin/example/example-api.php
new file mode 100644
index 0000000..a961a7d
--- /dev/null
+++ b/vendor/edu-sharing-plugin/example/example-api.php
@@ -0,0 +1,59 @@
+<?php
+define('APP_ID', 'data-quest Test');
+define('BASE_URL', 'http://localhost:8080/edu-sharing');
+define('USERNAME', 'root@studip');
+
+
+header('Accept: application/json');
+header('Content-Type: application/json');
+
+require_once "../edu-sharing-helper.php";
+require_once "../edu-sharing-helper-base.php";
+require_once "../edu-sharing-auth-helper.php";
+require_once "../edu-sharing-node-helper.php";
+
+$privatekey = @file_get_contents('private.key');
+if(!$privatekey) {
+    die('no private key');
+} else {
+    $key["privatekey"] = $privatekey;
+}
+// init the base class instance we use for all helpers
+$base = new EduSharingHelperBase(BASE_URL, $key["privatekey"], APP_ID);
+$postData = json_decode(file_get_contents('php://input'));
+$action = $postData->action;
+$result = null;
+if ($action === 'BASE_URL') {
+    $result = BASE_URL;
+} else if ($action === 'GET_NODE') {
+    $nodeHelper = new EduSharingNodeHelper($base);
+    $result = $nodeHelper->getNodeByUsage(
+        new Usage(
+            $postData->nodeId,
+            $postData->nodeVersion,
+            $postData->containerId,
+            $postData->resourceId,
+            $postData->usageId
+        )
+    );
+} else if ($action === 'CREATE_USAGE') {
+    $nodeHelper = new EduSharingNodeHelper($base);
+    $result = $nodeHelper->createUsage(
+        $postData->ticket,
+        $postData->containerId,
+        $postData->resourceId,
+        $postData->nodeId
+    );
+} else if ($action === 'DELETE_USAGE') {
+    $nodeHelper = new EduSharingNodeHelper($base);
+    $nodeHelper->deleteUsage(
+        $postData->nodeId,
+        $postData->usageId
+    );
+} else if ($action === 'TICKET') {
+    $authHelper = new EduSharingAuthHelper($base);
+    $ticket = $authHelper->getTicketForUser(USERNAME);
+    $result = $ticket;
+}
+
+echo json_encode($result);
diff --git a/vendor/edu-sharing-plugin/example/example.php b/vendor/edu-sharing-plugin/example/example.php
new file mode 100644
index 0000000..e959d59
--- /dev/null
+++ b/vendor/edu-sharing-plugin/example/example.php
@@ -0,0 +1,49 @@
+<?php
+/**
+ * This is a sample file on how to use the edu-sharing remote library
+ * Run this script for the first time to create a private/public keypair
+ * On first run, a properties.xml file will be created
+ * Upload this file to your target edu-sharing (Admin-Tools -> Remote Systems -> Choose XML-File)
+ */
+
+define('APP_ID', 'sample-app');
+define('USERNAME', 'tester');
+require_once "../edu-sharing-helper.php";
+require_once "../edu-sharing-helper-base.php";
+require_once "../edu-sharing-auth-helper.php";
+require_once "../edu-sharing-node-helper.php";
+
+$privatekey = @file_get_contents('private.key');
+if(!$privatekey) {
+    $key = EduSharingHelper::generateKeyPair();
+    // store the $key data inside your application, e.g. your database or plugin config
+    file_put_contents(APP_ID . '.properties.xml', EduSharingHelper::generateEduAppXMLData(APP_ID, $key['publickey']));
+    file_put_contents('private.key', $key['privatekey']);
+    die('Wrote ' . APP_ID . '.properties.xml file. Upload it to edu-sharing, then run this script again');
+} else {
+    $key["privatekey"] = $privatekey;
+}
+if(count($argv) < 2) {
+    die('This script should be called as follow: "example.php http://localhost:8080/edu-sharing [<node-id>]"');
+}
+// init the base class instance we use for all helpers
+$base = new EduSharingHelperBase($argv[1], $key["privatekey"], APP_ID);
+$base->setLanguage('de');
+
+// authenticating (getting a ticket) and validating the given ticket
+$authHelper = new EduSharingAuthHelper($base);
+$ticket = $authHelper->getTicketForUser(USERNAME);
+echo "Ticket validation result:\n";
+print_r($authHelper->getTicketAuthenticationInfo($ticket));
+
+if(count($argv) !== 3) {
+    die("No node id given. Add a 3rd parameter to test create + fetching of nodes by usage");
+}
+$nodeHelper = new EduSharingNodeHelper($base);
+$usage = $nodeHelper->createUsage($ticket, '1', '1', $argv[2]);
+echo "Usage create result:\n";
+print_r($usage);
+
+$node = $nodeHelper->getNodeByUsage($usage);
+echo "Get node by usage:\n";
+print_r($node["node"]["name"]);
\ No newline at end of file
diff --git a/vendor/edu-sharing-plugin/example/index.html b/vendor/edu-sharing-plugin/example/index.html
new file mode 100644
index 0000000..9be18ce
--- /dev/null
+++ b/vendor/edu-sharing-plugin/example/index.html
@@ -0,0 +1,120 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Edu Sharing Usage Example</title>
+    <style>
+        body > div {
+            padding: 20px 10px;
+        }
+        pre {
+            border: 1px solid #eee;
+            padding: 10px;
+            margin: 10px;
+        }
+    </style>
+    <script>
+        let ticket;
+        let baseUrl = null;
+        let esWindow = null;
+        function openEduSharing() {
+            esWindow = window.open(
+                baseUrl + '/components/search?ticket=' + encodeURIComponent(ticket) +
+                '&reurl=IFRAME'
+            );
+        }
+        window.addEventListener('message', receiveMessage, false);
+        async function receiveMessage(event){
+            if(event.data.event === 'APPLY_NODE'){ // Event Name hier festlegen
+                esWindow.close();
+                console.log(event.data.data);
+                usage = await createUsage(event.data.data.nodeId);
+                // in a real application, the usage is stored in your backend system
+                localStorage.setItem('usage', JSON.stringify(usage));
+                await renderUsage();
+
+            }
+        }
+        async function renderUsage() {
+            if(localStorage.getItem('usage')) {
+                const usage = JSON.parse(localStorage.getItem('usage'));
+                document.querySelector('#usage').style.display = null;
+                document.querySelector('#delete-usage').style.display = null;
+                document.querySelector('#usage').innerHTML = JSON.stringify(usage, null, 4);
+                usage.action = 'GET_NODE';
+                const render = await fetchAPI(usage)
+                document.querySelector('#render').innerHTML = render.detailsSnippet;
+            }
+
+        }
+        async function createUsage(nodeId) {
+            return await fetchAPI({
+                action: 'CREATE_USAGE',
+                ticket,
+                nodeId,
+                containerId: 'my_sample_page_1',
+                resourceId: Math.random()
+            });
+        }
+        async function deleteUsage(nodeId) {
+            const usage = JSON.parse(localStorage.getItem('usage'));
+            await fetchAPI({
+                action: 'DELETE_USAGE',
+                nodeId: usage.nodeId,
+                usageId: usage.usageId
+            });
+            localStorage.removeItem('usage');
+            document.querySelector('#render').style.display = 'none';
+            document.querySelector('#usage').style.display = 'none';
+            document.querySelector('#delete-usage').style.display = 'none';
+        }
+        async function fetchAPI(data) {
+            return new Promise((resolve, reject) => {
+                var xhr = new XMLHttpRequest();
+                xhr.open("POST", "example-api.php", true);
+                xhr.onload = () => {
+                    if (xhr.readyState === 4) {
+                        if (xhr.status === 200) {
+                            resolve(JSON.parse(xhr.response));
+                        } else {
+                            alert(xhr.statusText);
+                            reject(xhr.statusText);
+                        }
+                    }
+                };
+                xhr.onerror = function (e) {
+                    alert(xhr.statusText);
+                };
+                xhr.send(JSON.stringify(data));
+            });
+        }
+        async function getTicket() {
+            ticket = await fetchAPI({action: 'TICKET'});
+            document.querySelector('#ticket').innerText = ticket;
+            document.querySelector('#edu-select').style.display = null;
+
+        }
+        window.addEventListener('load', async () => {
+            baseUrl = await fetchAPI({action: 'BASE_URL'});
+            await renderUsage();
+
+            await getTicket();
+        });
+    </script>
+</head>
+<body>
+<div>
+    <button onclick="getTicket()">Re-Fetch ticket</button>
+    <span id="ticket">No ticket</span>
+</div>
+<div id="edu-select" style="display:none;">
+    <button onclick="openEduSharing()">Open edu-sharing & select node</button>
+</div>
+<pre id="usage" style="display: none"></pre>
+<div id="delete-usage" style="display: none">
+    <button onclick="deleteUsage()">Delete current Usage</button>
+</div>
+<div id="render"></div>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/vendor/edu-sharing-plugin/readme.md b/vendor/edu-sharing-plugin/readme.md
new file mode 100644
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+++ b/vendor/edu-sharing-plugin/readme.md
@@ -0,0 +1 @@
+This library is a changed version of https://github.com/edu-sharing/php-auth-plugin