/**
 * Stores a tag for a course for a user
 *
 * @uses $CFG
 * @param array $tags simple array of keywords to be stored
 * @param integer $courseid
 * @param integer $userid
 * @param string $tagtype official or default only
 * @param string $myurl optional for logging creation of course tags
 */
function coursetag_store_keywords($tags, $courseid, $userid=0, $tagtype='official', $myurl='') {

    global $CFG;

    if (is_array($tags) and !empty($tags)) {
        foreach($tags as $tag) {
            $tag = trim($tag);
            if (strlen($tag) > 0) {
                //tag_set_add('course', $courseid, $tag, $userid); //deletes official tags

                //add tag if does not exist
                if (!$tagid = tag_get_id($tag)) {
                    $tag_id_array = tag_add(array($tag), $tagtype);
                    $tagid = $tag_id_array[moodle_strtolower($tag)];
                }
                //ordering
                $ordering = 0;
                if ($current_ids = tag_get_tags_ids('course', $courseid)) {
                    end($current_ids);
                    $ordering = key($current_ids) + 1;
                }
                //set type
                tag_type_set($tagid, $tagtype);

                //tag_instance entry
                tag_assign('course', $courseid, $tagid, $ordering, $userid);

                //logging - note only for user added tags
                if ($tagtype == 'default' and $myurl != '') {
                    $url = $myurl.'?query='.urlencode($tag);
                    add_to_log($courseid, 'coursetags', 'add', $url, 'Course tagged');
                }
            }
        }
    }

}

 /**
  * Test the tag created event.
  */
 public function test_tag_created()
 {
     global $DB;
     // Trigger and capture the event for creating a tag.
     $sink = $this->redirectEvents();
     tag_add('A really awesome tag!');
     $events = $sink->get_events();
     $event = reset($events);
     // Check that the tag was created and the event data is valid.
     $this->assertEquals(1, $DB->count_records('tag'));
     $this->assertInstanceOf('\\core\\event\\tag_created', $event);
     $this->assertEquals(context_system::instance(), $event->get_context());
 }

/**
 * Set the tags assigned to a record.  This overwrites the current tags.
 * 
 * This function is meant to be fed the string coming up from the user 
 * interface, which contains all tags assigned to a record.
 *
 * @param string $record_type the type of record to tag ('post' for blogs, 
 *     'user' for users, 'tag' for tags, etc.
 * @param int $record_id the id of the record to tag
 * @param array $tags the array of tags to set on the record. If 
 *     given an empty array, all tags will be removed.
 * @return void 
 */
function tag_set($record_type, $record_id, $tags)
{
    static $in_recursion_semaphore = false;
    // this is to prevent loops when tagging a tag
    if ($record_type == 'tag' && !$in_recursion_semaphore) {
        $current_tagged_tag_name = tag_get_name($record_id);
    }
    $tags_ids = tag_get_id($tags, TAG_RETURN_ARRAY);
    // force an array, even if we only have one tag.
    $cleaned_tags = tag_normalize($tags);
    //echo 'tags-in-tag_set'; var_dump($tags); var_dump($tags_ids); var_dump($cleaned_tags);
    $current_ids = tag_get_tags_ids($record_type, $record_id);
    //var_dump($current_ids);
    // for data coherence reasons, it's better to remove deleted tags
    // before adding new data: ordering could be duplicated.
    foreach ($current_ids as $current_id) {
        if (!in_array($current_id, $tags_ids)) {
            tag_delete_instance($record_type, $record_id, $current_id);
            if ($record_type == 'tag' && !$in_recursion_semaphore) {
                // if we are removing a tag-on-a-tag (manually related tag),
                // we need to remove the opposite relationship as well.
                tag_delete_instance('tag', $current_id, $record_id);
            }
        }
    }
    foreach ($tags as $ordering => $tag) {
        $tag = trim($tag);
        if (!$tag) {
            continue;
        }
        $clean_tag = $cleaned_tags[$tag];
        $tag_current_id = $tags_ids[$clean_tag];
        if (is_null($tag_current_id)) {
            // create new tags
            //echo "call to add tag $tag\n";
            $new_tag = tag_add($tag);
            $tag_current_id = $new_tag[$clean_tag];
        }
        tag_assign($record_type, $record_id, $tag_current_id, $ordering);
        // if we are tagging a tag (adding a manually-assigned related tag), we
        // need to create the opposite relationship as well.
        if ($record_type == 'tag' && !$in_recursion_semaphore) {
            $in_recursion_semaphore = true;
            tag_set_add('tag', $tag_current_id, $current_tagged_tag_name);
            $in_recursion_semaphore = false;
        }
    }
}

            $notice .= ' -- ' . get_string('updated', 'tag');
        }
        break;
    case 'addofficialtag':
        if (!data_submitted() or !confirm_sesskey()) {
            break;
        }
        $new_otags = explode(',', optional_param('otagsadd', '', PARAM_TAG));
        $notice = '';
        foreach ($new_otags as $new_otag) {
            if ($new_otag_id = tag_get_id($new_otag)) {
                // tag exists, change the type
                tag_type_set($new_otag_id, 'official');
            } else {
                require_capability('moodle/tag:create', get_context_instance(CONTEXT_SYSTEM));
                tag_add($new_otag, 'official');
            }
            $notice .= get_string('addedotag', 'tag', $new_otag) . ' ';
        }
        break;
}
if ($err_notice) {
    echo $OUTPUT->notification($err_notice, 'red');
}
if ($notice) {
    echo $OUTPUT->notification($notice, 'green');
}
// small form to add an official tag
print '<form class="tag-management-form" method="post" action="' . $CFG->wwwroot . '/tag/manage.php">';
print '<input type="hidden" name="action" value="addofficialtag" />';
print '<div class="tag-management-form generalbox"><label class="accesshide" for="id_otagsadd">' . get_string('addotags', 'tag') . '</label>' . '<input name="otagsadd" id="id_otagsadd" type="text" />' . '<input type="hidden" name="sesskey" value="' . sesskey() . '">' . '<input name="addotags" value="' . get_string('addotags', 'tag') . '" onclick="skipClientValidation = true;" id="id_addotags" type="submit" />' . '</div>';

/**
 * Stores a tag for a course for a user
 *
 * @package  core_tag
 * @category tag
 * @param    array  $tags     simple array of keywords to be stored
 * @param    int    $courseid the id of the course we wish to store a tag for
 * @param    int    $userid   the id of the user we wish to store a tag for
 * @param    string $tagtype  official or default only
 * @param    string $myurl    (optional) for logging creation of course tags
 */
function coursetag_store_keywords($tags, $courseid, $userid = 0, $tagtype = 'official', $myurl = '')
{
    global $CFG;
    if (is_array($tags) and !empty($tags)) {
        foreach ($tags as $tag) {
            $tag = trim($tag);
            if (strlen($tag) > 0) {
                //tag_set_add('course', $courseid, $tag, $userid); //deletes official tags
                //add tag if does not exist
                if (!($tagid = tag_get_id($tag))) {
                    $tag_id_array = tag_add(array($tag), $tagtype);
                    $tagid = $tag_id_array[core_text::strtolower($tag)];
                }
                //ordering
                $ordering = 0;
                if ($current_ids = tag_get_tags_ids('course', $courseid)) {
                    end($current_ids);
                    $ordering = key($current_ids) + 1;
                }
                //set type
                tag_type_set($tagid, $tagtype);
                //tag_instance entry
                tag_assign('course', $courseid, $tagid, $ordering, $userid, 'core', context_course::instance($courseid)->id);
            }
        }
    }
}

require "foundation/aanti_refresh.php";
require "foundation/ftag.php";
//引入语言包
$a_langpackage = new albumlp();
//变量取得
$album_name = short_check(get_argp('album_name'));
$album_information = short_check(get_argp('album_information'));
$privacy = short_check(get_argp('privacy'));
$user_id = get_sess_userid();
$user_name = get_sess_username();
$tag = short_check(get_argp('tag'));
//防止重复提交
antiRePost($album_name);
if ($album_name == '') {
    action_return(1, "", -1);
    exit;
}
//数据表定义区
$t_album = $tablePreStr . "album";
$dbo = new dbex();
//读写分离定义函数
dbtarget('w', $dbServs);
$album_skin = "uploadfiles/album/logo.jpg";
$sql = "insert into {$t_album} (`album_name`,`user_id`,`user_name`,`album_info`,`add_time`,`privacy`,`album_skin`,`tag`,`update_time`) " . "values('{$album_name}',{$user_id},'{$user_name}','{$album_information}',NOW(),'{$privacy}','{$album_skin}','{$tag}',NOW()); ";
$dbo->exeUpdate($sql);
$album_id = mysql_insert_id();
//标签功能
$tag_id = tag_add($tag);
$tag_state = tag_relation(0, $tag_id, $album_id);
//回应信息
action_return(1, "", "modules.php?app=photo_upload&album_id={$album_id}");

 /**
  * Sets 'Set' tags for groups for the forum.
  * Necessary to use this rather than core tag lib as that does not deal with context
  * and as group item ids can be the same that is an issue
  * Also can only have 1 unique group/tag/user record
  * @param int $forumid forum table id
  * @param int $groupid groups table id
  * @param array $tags array of tag rawnames e.g. Fish, frog
  */
 public static function set_group_tags($forumid, $groupid, $tags)
 {
     global $DB, $CFG, $USER;
     require_once $CFG->dirroot . '/tag/lib.php';
     $forum = self::get_from_id($forumid, self::CLONE_DIRECT);
     $context = $forum->get_context(true);
     $transaction = $DB->start_delegated_transaction();
     // Get existing tags used.
     $settags = array();
     $taginstances = $DB->get_records_sql("\n                SELECT DISTINCT t.*, ti.id as instanceid\n                  FROM {tag} t\n            INNER JOIN {tag_instance} ti\n               ON t.id = ti.tagid\n                 WHERE ti.component = ? AND ti.itemtype = ? AND ti.contextid = ? AND ti.itemid = ?", array('mod_forumng', 'groups', $context->id, $groupid));
     // Delete instances any not in new tags (note tag records not deleted as cleaned in cron).
     $tistodelete = array();
     foreach ($taginstances as $tinstance) {
         if (!in_array($tinstance->rawname, $tags)) {
             $tistodelete[] = $tinstance->instanceid;
         } else {
             // Store existing tag instance used.
             $settags[$tinstance->instanceid] = $tinstance->rawname;
         }
     }
     if ($tistodelete) {
         list($delsql, $delparams) = $DB->get_in_or_equal($tistodelete);
         $DB->delete_records_select('tag_instance', "id {$delsql}", $delparams);
     }
     // Add/get new tag records.
     $existingtags = tag_get_id($tags, TAG_RETURN_ARRAY);
     // Normalize tags passed so can match to existing tags array.
     $normaltags = tag_normalize($tags);
     // Add tag instances (where needed).
     $ordering = 0;
     foreach ($normaltags as $rawname => $name) {
         if (in_array($rawname, $settags)) {
             // Pre-existing instance, skip.
             $ordering++;
             continue;
         }
         $tagid = 0;
         if (!array_key_exists($name, $existingtags) || empty($existingtags[$name])) {
             // Need to add tag.
             $newtag = tag_add($rawname);
             $tagid = array_pop($newtag);
         } else {
             $tagid = $existingtags[$name];
         }
         // Create instance (like tag_assign()).
         $tag_instance_object = new stdClass();
         $tag_instance_object->tagid = $tagid;
         $tag_instance_object->component = 'mod_forumng';
         $tag_instance_object->itemid = $groupid;
         $tag_instance_object->itemtype = 'groups';
         $tag_instance_object->contextid = $context->id;
         $tag_instance_object->ordering = $ordering;
         $tag_instance_object->timecreated = time();
         $tag_instance_object->timemodified = $tag_instance_object->timecreated;
         $tag_instance_object->tiuserid = self::get_group_taginstance_userid($groupid, $tagid);
         $DB->insert_record('tag_instance', $tag_instance_object);
         $ordering++;
     }
     $DB->commit_delegated_transaction($transaction);
 }

/**
 * Stores a tag for a course for a user
 *
 * @deprecated since 3.0
 * @package  core_tag
 * @category tag
 * @param    array  $tags     simple array of keywords to be stored
 * @param    int    $courseid the id of the course we wish to store a tag for
 * @param    int    $userid   the id of the user we wish to store a tag for
 * @param    string $tagtype  official or default only
 * @param    string $myurl    (optional) for logging creation of course tags
 */
function coursetag_store_keywords($tags, $courseid, $userid = 0, $tagtype = 'official', $myurl = '')
{
    debugging('Function coursetag_store_keywords() is deprecated. Userid is no longer used for tagging courses.', DEBUG_DEVELOPER);
    global $CFG;
    require_once $CFG->dirroot . '/tag/lib.php';
    if (is_array($tags) and !empty($tags)) {
        foreach ($tags as $tag) {
            $tag = trim($tag);
            if (strlen($tag) > 0) {
                //tag_set_add('course', $courseid, $tag, $userid); //deletes official tags
                //add tag if does not exist
                if (!($tagid = tag_get_id($tag))) {
                    $tag_id_array = tag_add(array($tag), $tagtype);
                    $tagid = $tag_id_array[core_text::strtolower($tag)];
                }
                //ordering
                $ordering = 0;
                if ($current_ids = tag_get_tags_ids('course', $courseid)) {
                    end($current_ids);
                    $ordering = key($current_ids) + 1;
                }
                //set type
                tag_type_set($tagid, $tagtype);
                //tag_instance entry
                tag_assign('course', $courseid, $tagid, $ordering, $userid, 'core', context_course::instance($courseid)->id);
            }
        }
    }
}