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<?php
/**
* @author Till Glöggler <tgloeggl@uos.de>
* @author André Klaßen <klassen@elan-ev.de>
* @license GPL 2 or later
*/
namespace Studip\Activity;
class Stream implements \ArrayAccess, \Countable, \IteratorAggregate
{
private $activities;
/**
* creates a stream representing the activities for the passed contexts,
* filter by time (if any)
*
* @param array $contexts All contexts that need to be considered
* @param \Studip\Activity\Filter $filter
*
* @throws \InvalidArgumentException
*/
public function __construct($contexts, Filter $filter)
{
if (!is_array($contexts)) {
$contexts = [$contexts];
}
foreach ($contexts as $context) {
if (!$context instanceof Context) {
throw new \InvalidArgumentException();
}
}
if (!$filter instanceof Filter) {
throw new \InvalidArgumentException();
}
//fetch avaible contextes in given timespan
$available_contexts = \DBManager::get()->fetchGroupedPairs(
"SELECT DISTINCT context,context_id FROM activities WHERE mkdate BETWEEN ? AND ?",
[$filter->getStartDate(), $filter->getEndDate()]);
//fetch activities only for contextes with known activities
$activities = array_flatten(array_values(array_filter(array_map(
function ($context) use ($filter, $available_contexts) {
if (isset($available_contexts[$context->getContextType()])
&& in_array($context->getRangeId(), $available_contexts[$context->getContextType()])) {
return $context->getActivities($filter);
}
}, $contexts))
));
$new_activities = [];
foreach ($activities as $activity) {
// generate an id for the activity, considering some basic object parameters
$id = md5($activity->provider . $activity->content .
$activity->verb . $activity->object_type . $activity->mkdate);
if (isset($new_activities[$id])) {
$url = key($activity->object_url);
$name = current($activity->object_url);
next($activity->object_url);
$new_activities[$id]->addUrl($url, $name);
} else {
$new_activities[$id] = $activity;
}
}
// sort activites by their mkdate
usort($new_activities, function($a, $b) {
return $b->mkdate - $a->mkdate;
});
$this->activities = $new_activities;
}
/**
* ArrayAccess: Check whether the given offset exists.
*
* @todo Add bool return type when Stud.IP requires PHP8 minimal
*/
#[\ReturnTypeWillChange]
public function offsetExists($offset)
{
return isset($this->activities[$offset]);
}
/**
* ArrayAccess: Get the value at the given offset.
*
* @todo Add mixed return type when Stud.IP requires PHP8 minimal
*/
#[\ReturnTypeWillChange]
public function offsetGet($offset)
{
return $this->activities[$offset];
}
/**
* ArrayAccess: Set the value at the given offset.
*
* @todo Add void return type when Stud.IP requires PHP8 minimal
*/
#[\ReturnTypeWillChange]
public function offsetSet($offset, $value)
{
$this->activities[$offset] = $value;
}
/**
* ArrayAccess: unset the value at the given offset (not applicable)
*
* @todo Add void return type when Stud.IP requires PHP8 minimal
*/
#[\ReturnTypeWillChange]
public function offsetUnset($offset)
{
unset($this->activities[$offset]);
}
/**
* IteratorAggregate
*
* @todo Add \Traversable return type when Stud.IP requires PHP8 minimal
*/
#[\ReturnTypeWillChange]
public function getIterator()
{
return new \ArrayIterator($this->activities);
}
/**
* Countable
*
* @todo Add int return type when Stud.IP requires PHP8 minimal
*/
#[ReturnTypeWillChange]
public function count()
{
return count($this->activities);
}
/**
* return representation of the current stream as an array
*
* @return array
*/
public function toArray()
{
$activities = [];
foreach ($this as $key => $activity) {
$activities[$key] = $activity->toArray();
// add i18n auto generated title prefix
$title = '';
// $class = '\\Studip\\Activity\\' . ucfirst($activity->provider) . 'Provider';
$class = $activity->provider;
$object_text = $class::getLexicalField();
if (in_array($activity->actor_id, ['____%system%____', 'system']) !== false) {
$actor = _('Stud.IP');
} elseif ($activity->actor_type === 'anonymous') {
$actor = _('Anonym');
} else {
$actor = get_fullname($activity->actor_id);
}
$context_name = $activity->getContextObject()->getContextFullname();
switch ($activity->context) {
case 'course':
$title = $actor .' '
. sprintf($activity->verbToText(),
$object_text . sprintf(_(' im Kurs "%s"'), $context_name)
);
break;
case 'institute':
$title = $actor .' '
. sprintf($activity->verbToText(),
$object_text . sprintf(_(' in der Einrichtung "%s"'), $context_name)
);
break;
case 'system':
$title = $actor .' '
. sprintf($activity->verbToText(), _('allen')) .' '
. $object_text;
break;
case 'user':
$title = $actor .' '
. sprintf($activity->verbToText(), $context_name) .' '
. $object_text;
break;
}
$activities[$key]['title'] = $title;
}
return $activities;
}
}
|
