1 files changed, 101 insertions, 0 deletions
diff --git a/lib/classes/Feedback.php b/lib/classes/Feedback.php
new file mode 100644
index 0000000..26dbf55
--- /dev/null
+++ b/lib/classes/Feedback.php
@@ -0,0 +1,101 @@
+<?php
+
+/**
+ * @author Nils Gehrke <nils.gehrke@uni-goettingen.de>
+ */
+class Feedback
+{
+    /**
+     * Returns the html code for feedback elements for a given range, if the module is activated within a course
+     *
+     * @return string
+     */
+    public static function getHTML(string $range_id, string $range_type)
+    {
+        if (!$range_id) {
+            return null;
+        }
+        $course_id = null;
+        if (is_subclass_of($range_type, \FeedbackRange::class)) {
+            $range_object = $range_type::find($range_id);
+            if ($range_object) {
+                $course_id = $range_object->getRangeCourseId();
+            }
+        }
+        if ($course_id && Feedback::isActivated($course_id) && Feedback::hasRangeAccess($range_id, $range_type)) {
+            return '<div class="feedback-elements" for="' . $range_id . '" type="' . $range_type . '" context="' . $course_id . '"></div>';
+        } else {
+            return null;
+        }
+    }
+    /**
+     * Returns activation status of the feedback module in currently active course
+     *
+     * @param string $course_id  optional; use this course_id instead of the current context
+     *
+     * @return boolean
+     */
+    public static function isActivated(string $course_id = null): bool
+    {
+        $course_id          = $course_id ?? Context::getId();
+        $plugin_manager     = PluginManager::getInstance();
+        $feedback_module    = $plugin_manager->getPluginInfo('FeedbackModule');
+
+        return $plugin_manager->isPluginActivated($feedback_module['id'], $course_id) ?? false;
+    }
+
+    /**
+     * Returns admin permission of current user within given course
+     *
+     * @param string $course_id  the course
+     * @param string $user_id    optional; use this ID instead of $GLOBALS['user']->id
+     *
+     * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.Superglobals)
+     */
+    public static function hasAdminPerm($course_id, string $user_id = null): bool
+    {
+        $user_id = $user_id ?? $GLOBALS['user']->id;
+        $admin_perm_level =  CourseConfig::get($course_id)->FEEDBACK_ADMIN_PERM;
+        $admin_perm = $GLOBALS['perm']->have_studip_perm($admin_perm_level, $course_id, $user_id);
+
+        return $admin_perm;
+    }
+
+    /**
+     * Returns create permission of current user within given course
+     *
+     * @param string $course_id  the course
+     * @param string $user_id    optional; use this ID instead of $GLOBALS['user']->id
+     *
+     * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.Superglobals)
+     */
+    public static function hasCreatePerm($course_id, string $user_id = null): bool
+    {
+        $user_id = $user_id ?? $GLOBALS['user']->id;
+        $create_perm_level =  CourseConfig::get($course_id)->FEEDBACK_CREATE_PERM;
+        $create_perm = $GLOBALS['perm']->have_studip_perm($create_perm_level, $course_id, $user_id);
+
+        return $create_perm;
+    }
+
+    /**
+     * Returns range access permission of current user for given range
+     *
+     * @param string $range_id
+     * @param string $range_type
+     * @param string $user_id    optional; use this ID instead of $GLOBALS['user']->id
+     *
+     * @return boolean
+     */
+    public static function hasRangeAccess($range_id, $range_type, string $user_id = null): bool
+    {
+        $user_id = $user_id ?? $GLOBALS['user']->id;
+        $range = $range_type::find($range_id);
+        return $range->isRangeAccessible($user_id);
+    }
+
+}