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MDL-61363 tag: add get_items_tags function

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Ryan Wyllie 2018-02-23 10:52:38 +08:00
parent 064f6b5a81
commit 694710d0f2
1 changed files with 59 additions and 34 deletions
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93
tag/classes/tag.php
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@ -637,6 +637,62 @@ class core_tag_tag {
$DB->update_record('tag_instance', $data);
}
/**
* Get the array of core_tag_tag objects associated with a list of items.
*
* Use {@link core_tag_tag::get_item_tags_array()} if you wish to get the same data as simple array.
*
* @param string $component component responsible for tagging. For BC it can be empty but in this case the
* query will be slow because DB index will not be used.
* @param string $itemtype type of the tagged item
* @param int[] $itemids
* @param int $standardonly wether to return only standard tags or any
* @param int $tiuserid tag instance user id, only needed for tag areas with user tagging
* @return core_tag_tag[] each object contains additional fields taginstanceid, taginstancecontextid and ordering
*/
public static function get_items_tags($component, $itemtype, $itemids, $standardonly = self::BOTH_STANDARD_AND_NOT,
$tiuserid = 0) {
global $DB;
if (static::is_enabled($component, $itemtype) === false) {
// Tagging area is properly defined but not enabled - return empty array.
return array();
}
if (empty($itemids)) {
return array();
}
$standardonly = (int)$standardonly; // In case somebody passed bool.
list($idsql, $params) = $DB->get_in_or_equal($itemids, SQL_PARAMS_NAMED);
// Note: if the fields in this query are changed, you need to do the same changes in core_tag_tag::get_correlated_tags().
$sql = "SELECT ti.id AS taginstanceid, tg.id, tg.isstandard, tg.name, tg.rawname, tg.flag,
tg.tagcollid, ti.ordering, ti.contextid AS taginstancecontextid, ti.itemid
FROM {tag_instance} ti
JOIN {tag} tg ON tg.id = ti.tagid
WHERE ti.itemtype = :itemtype AND ti.itemid $idsql ".
($component ? "AND ti.component = :component " : "").
($tiuserid ? "AND ti.tiuserid = :tiuserid " : "").
(($standardonly == self::STANDARD_ONLY) ? "AND tg.isstandard = 1 " : "").
(($standardonly == self::NOT_STANDARD_ONLY) ? "AND tg.isstandard = 0 " : "").
"ORDER BY ti.ordering ASC, ti.id";
$params['itemtype'] = $itemtype;
$params['component'] = $component;
$params['tiuserid'] = $tiuserid;
$records = $DB->get_records_sql($sql, $params);
$result = array();
foreach ($itemids as $itemid) {
$result[$itemid] = [];
}
foreach ($records as $id => $record) {
$result[$record->itemid][$id] = new static($record);
}
return $result;
}
/**
* Get the array of core_tag_tag objects associated with an item (instances).
*
@ -652,39 +708,8 @@ class core_tag_tag {
*/
public static function get_item_tags($component, $itemtype, $itemid, $standardonly = self::BOTH_STANDARD_AND_NOT,
$tiuserid = 0) {
global $DB;
if (static::is_enabled($component, $itemtype) === false) {
// Tagging area is properly defined but not enabled - return empty array.
return array();
}
$standardonly = (int)$standardonly; // In case somebody passed bool.
// Note: if the fields in this query are changed, you need to do the same changes in core_tag_tag::get_correlated_tags().
$sql = "SELECT ti.id AS taginstanceid, tg.id, tg.isstandard, tg.name, tg.rawname, tg.flag,
tg.tagcollid, ti.ordering, ti.contextid AS taginstancecontextid
FROM {tag_instance} ti
JOIN {tag} tg ON tg.id = ti.tagid
WHERE ti.itemtype = :itemtype AND ti.itemid = :itemid ".
($component ? "AND ti.component = :component " : "").
($tiuserid ? "AND ti.tiuserid = :tiuserid " : "").
(($standardonly == self::STANDARD_ONLY) ? "AND tg.isstandard = 1 " : "").
(($standardonly == self::NOT_STANDARD_ONLY) ? "AND tg.isstandard = 0 " : "").
"ORDER BY ti.ordering ASC, ti.id";
$params = array();
$params['itemtype'] = $itemtype;
$params['itemid'] = $itemid;
$params['component'] = $component;
$params['tiuserid'] = $tiuserid;
$records = $DB->get_records_sql($sql, $params);
$result = array();
foreach ($records as $id => $record) {
$result[$id] = new static($record);
}
return $result;
$tagobjects = static::get_items_tags($component, $itemtype, [$itemid], $standardonly, $tiuserid);
return empty($tagobjects) ? [] : $tagobjects[$itemid];
}
/**
@ -1158,7 +1183,7 @@ class core_tag_tag {
// This is (and has to) return the same fields as the query in core_tag_tag::get_item_tags().
$sql = "SELECT ti.id AS taginstanceid, tg.id, tg.isstandard, tg.name, tg.rawname, tg.flag,
tg.tagcollid, ti.ordering, ti.contextid AS taginstancecontextid
tg.tagcollid, ti.ordering, ti.contextid AS taginstancecontextid, ti.itemid
FROM {tag} tg
INNER JOIN {tag_instance} ti ON tg.id = ti.tagid
WHERE tg.id $query AND tg.id <> ? AND tg.tagcollid = ?