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<?php
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// $Id$
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/**
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* @file
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* Converts @usernames to themed usernames and #hashtags to themed taxonomy terms on Facebook-style Statuses.
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*/
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/**
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* In this file:
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* - "Tag" means a reference, like @username or #hashtag.
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* - "Term" means a taxonomy term.
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*/
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//=============
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//DRUPAL HOOKS.
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//=============
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/**
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* Implementation of hook_help().
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*/
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function facebook_status_tags_help($path, $arg) {
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if ($path == 'admin/help#facebook_status_tags') {
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return t('Modifies Facebook-style Statuses on display to replace @username references with the themed username and #hashtags with taxonomy terms. ') .
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t('Please see the <a href="http://drupal.org/project/facebook_status" rel="nofollow">Facebook-style Statuses project page</a> for more information.');
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}
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}
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/**
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* Implementation of hook_form_FORM_ID_alter().
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*/
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function facebook_status_tags_form_facebook_status_admin_advanced_alter(&$form, &$form_state) {
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if (module_exists('taxonomy')) {
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$options = array('-1' => t('None'));
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$vocabularies = taxonomy_get_vocabularies();
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foreach ($vocabularies as $vocabulary) {
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$options[$vocabulary->vid] = check_plain($vocabulary->name);
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}
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$form['facebook_status_tags_vid'] = array(
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'#type' => 'select',
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'#title' => t('Vocabulary for #hashtags'),
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'#default_value' => variable_get('facebook_status_tags_vid', -1),
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'#options' => $options,
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'#weight' => -1,
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);
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$form['facebook_status_tags_url'] = array(
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'#type' => 'textfield',
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'#title' => t('Location of status-term pages'),
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'#description' => t('Can be an absolute or relative URL. Use the tokens [term-id] and [term-name]. Use Views to build the listing (a default one is provided).'),
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'#default_value' => variable_get('facebook_status_tags_url', 'statuses/term/[term-id]'),
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'#weight' => -1,
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);
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return $form;
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}
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}
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//====
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//API.
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//====
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/**
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* Gets statuses that have a given tag by tag name.
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*
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* @param $tag
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* The taxonomy term or username which retrieved statuses must contain.
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* @param $type
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* The type of tag: 'user' or 'term.'
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* @param $count
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* The number of statuses to retrieve, starting with the most recent one. If
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* zero, all relevant statuses are returned.
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* @param $uid
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* If zero, has no effect. If a positive integer, restricts results to
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* statuses by the user with that UID. If an array of positive integers,
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* restricts results to statuses by users with a UID in the array.
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* @return
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* An array of status objects.
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*/
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function facebook_status_tags_get_statuses_by_tag($tag, $type = 'term', $count = 1, $uid = 0) {
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$params = array($tag, $type);
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if ($uid == 0) {
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if ($type == 'term') {
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$sql = "SELECT fbst.sid FROM {facebook_status_tags} fbst INNER JOIN {term_data} td ON fbst.rid = td.tid WHERE td.name = '%s' AND fbst.type = '%s'";
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}
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else if ($type == 'user') {
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$sql = "SELECT fbst.sid FROM {facebook_status_tags} fbst INNER JOIN {users} u ON fbst.rid = u.uid WHERE u.name = '%s' AND fbst.type = '%s'";
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}
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}
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else {
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if (is_numeric($uid)) {
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$uid = array($uid);
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}
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$params = array_merge($params, $uid);
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if ($type == 'term') {
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$sql = "SELECT fbst.sid FROM {facebook_status_tags} fbst INNER JOIN {term_data} td ON fbst.rid = td.tid INNER JOIN {facebook_status} fb ON fbst.sid = fb.sid
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WHERE td.name = '%s' AND fbst.type = '%s' AND (";
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}
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else if ($type == 'user') {
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$sql = "SELECT fbst.sid FROM {facebook_status_tags} fbst INNER JOIN {users} u ON fbst.rid = u.uid INNER JOIN {facebook_status} fb ON fbst.sid = fb.sid
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WHERE u.name = '%s' AND fbst.type = '%s' AND (";
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}
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$sql .= implode(' OR ', array_fill(0, count($uid), 'fb.uid = %d'));
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$sql .= ')';
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}
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if ($count) {
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$result = db_query_range($sql, $params, 0, $count);
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}
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else {
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$result = db_query($sql, $params);
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}
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$statuses = array();
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while ($sid = db_fetch_object($result)) {
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$statuses[] = facebook_status_load($sid->sid);
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}
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return $statuses;
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}
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/**
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* Gets statuses that have a given tag by Term ID or User ID.
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*
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* @param $rid
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* The Term ID of tags or the User ID of users which retrieved statuses must
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* reference.
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* @param $type
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* The type of reference: 'user' or 'term.'
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* @param $count
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* The number of statuses to retrieve, starting with the most recent one. If
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* zero, all relevant statuses are returned.
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* @param $uid
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* If zero, has no effect. If a positive integer, restricts results to
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* statuses by the user with that UID. If an array of positive integers,
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* restricts results to statuses by users with a UID in the array.
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* @return
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* An array of status objects.
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*/
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function facebook_status_tags_get_statuses($rid, $type = 'term', $count = 1, $uid = 0) {
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$params = array($rid, $type);
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if ($uid == 0) {
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$sql = "SELECT sid FROM {facebook_status_tags} WHERE rid = %d AND type = '%s'";
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}
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else {
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if (is_numeric($uid)) {
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$uid = array($uid);
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}
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$params = array_merge($params, $uid);
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$sql = "SELECT fbst.sid FROM {facebook_status_tags} fbst INNER JOIN {facebook_status} fb ON fbst.sid = fb.sid WHERE fbst.rid = %d AND fbst.type = '%s' AND (";
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$sql .= implode(' OR ', array_fill(0, count($uid), 'fb.uid = %d'));
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$sql .= ')';
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}
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if ($count) {
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$result = db_query_range($sql, $params, 0, $count);
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}
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else {
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$result = db_query($sql, $params);
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}
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$statuses = array();
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while ($sid = db_fetch_object($result)) {
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$statuses[] = facebook_status_load($sid->sid);
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}
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return $statuses;
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}
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/**
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* Determines whether a given status has a given reference.
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*
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* @param $sid
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* The Status ID of the status being tested.
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* @param $rid
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* The Term ID or User ID of the reference being tested.
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* @param $type
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* The type of reference: 'user' or 'term.'
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* @return
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* 1 if the status has the reference or 0 if it does not.
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*/
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function facebook_status_tags_status_has_tag($sid, $rid, $type = 'term') {
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return db_result(db_query("SELECT COUNT(*) FROM {facebook_status_tags} WHERE sid = %d AND rid = %d AND type = '%s'", $sid, $rid, $type));
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}
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/**
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* Gets the tags that a given status has.
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*
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* @param $sid
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* The Status ID of the status for which to retrieve a tag.
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* @param $type
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* The type of reference: 'user' or 'term.'
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* @return
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* An array of term objects or user objects.
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*/
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function facebook_status_tags_get_status_tags($sid, $type = 'term') {
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$result = db_query("SELECT rid FROM {facebook_status_tags} WHERE sid = %d AND type = '%s'", $sid, $type);
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$rids = array();
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while ($rid = db_fetch_object($result)) {
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if ($type == 'term') {
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$rids[] = taxonomy_get_term($rid->rid);
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}
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else if ($type == 'user') {
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$rids[] = user_load(array('uid' => $rid->rid));
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}
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}
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return $rids;
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}
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//=================
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//HELPER FUNCTIONS.
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//=================
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/**
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* Replaces tags with a themed version.
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* Will not work on tags containing $op, a space, or an apostrophe.
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*
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* @param $text
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* The text in which to replace usernames.
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* @param $op
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* The character that indicates that the subsequent text could be a username.
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* Use the 'at' character (@) for usernames and the 'hash' character (#) for
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* taxonomy terms.
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* @return
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* The filtered text.
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*/
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function _facebook_status_tags_filter($text, $op = '@') {
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$pattern = '/([\s]'. $op .'.+\b)|(^'. $op .'.+\b)/U';
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preg_match_all($pattern, $text, $matches);
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$links = array();
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foreach ($matches[0] as $match) {
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if ($op == '@') {
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$account = user_load(array('name' => drupal_substr(trim($match), 1)));
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}
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else if ($op == '#' && module_exists('taxonomy') && variable_get('facebook_status_tags_vid', -1) != -1) {
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$term = _facebook_status_tags_get_term(drupal_substr(trim($match), 1));
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}
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$link = $op;
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if (drupal_substr($match, 0, 1) == ' ') {
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$link = ' '. $op;
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}
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if ($op == '@') {
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if ($account->uid) {
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$link .= theme('username', $account);
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}
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}
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else if ($op == '#') {
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if (!empty($term)) {
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$dest = _facebook_status_tags_resolve($term);
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if ($dest) {
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$link .= l($term->name, $dest);
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}
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}
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}
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if (trim($link) == $op) {
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$link = $match;
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}
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$links[] = $link;
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}
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return str_replace($matches[0], $links, $text);
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}
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/**
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* Resolves the URL to which to redirect a taxonomy term.
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*
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* @param $term
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* A taxonomy term object.
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* @return
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* The resolved URL.
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*/
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function _facebook_status_tags_resolve($term) {
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$url = variable_get('facebook_status_tags_url', 'statuses/term/[term-id]');
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if (!trim($url)) {
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return;
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}
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$phpversion = drupal_substr(phpversion(), 0, 1);
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//str_ireplace() is not defined in PHP4 so we use the case-sensitive version.
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if ($phpversion == 5) {
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return str_ireplace(array('[term-id]', '[term-name]'), array($term->tid, $term->name), $url);
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}
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else {
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return str_replace(array('[term-id]', '[term-name]'), array($term->tid, $term->name), $url);
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}
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}
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/**
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* Replaces both the username and hash tags.
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*/
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function _facebook_status_tags_replace($text) {
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$text = _facebook_status_tags_filter($text, '@');
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$text = _facebook_status_tags_filter($text, '#');
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return $text;
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}
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/**
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* Gets a taxonomy term by name.
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*/
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function _facebook_status_tags_get_term($name) {
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return db_fetch_object(db_query("SELECT tid, name FROM {term_data} WHERE LOWER(name) = LOWER('%s') AND vid = %d", $name, variable_get('facebook_status_tags_vid', -1)));
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}
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//=================
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//FBSS INTEGRATION.
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//=================
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/**
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* Implementation of hook_facebook_status_render().
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| 301 |
*/
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function facebook_status_tags_facebook_status_render($account, $status, $linked = TRUE) {
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if ($linked) {
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return array('_facebook_status_tags_replace' => array());
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}
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}
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/**
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* Implementation of hook_facebook_status_save().
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*/
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function facebook_status_tags_facebook_status_save($account, $status, $sid) {
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//Users.
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$pattern = '/([\s]@.+\b)|(^@.+\b)/U';
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preg_match_all($pattern, $status, $matches);
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$matches = $matches[0];
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$old_matches = array();
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foreach ($matches as $match) {
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$match = drupal_substr(trim($match), 1);
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$account = user_load(array('name' => $match));
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if ($account->uid) {
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if (!in_array($match, $old_matches)) {
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$array = array('sid' => $sid, 'rid' => $account->uid, 'type' => 'user');
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drupal_write_record('facebook_status_tags', $array);
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}
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$old_matches[] = $match;
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}
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}
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//Terms.
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| 330 |
if (!module_exists('taxonomy') || variable_get('facebook_status_tags_vid', -1) == -1) {
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return;
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}
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$pattern = '/([\s]#.+\b)|(^#.+\b)/U';
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preg_match_all($pattern, $status, $matches);
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| 335 |
$matches = $matches[0];
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| 336 |
$old_matches = array();
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| 337 |
foreach ($matches as $match) {
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$match = drupal_substr(trim($match), 1);
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| 339 |
//If the term does not exist, create it.
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| 340 |
$term = _facebook_status_tags_get_term($match);
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| 341 |
if (empty($term)) {
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| 342 |
$term = array(
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| 343 |
'vid' => variable_get('facebook_status_tags_vid', -1),
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| 344 |
'name' => $match,
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| 345 |
'description' => '',
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| 346 |
'weight' => 0,
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| 347 |
);
|
| 348 |
taxonomy_save_term($term);
|
| 349 |
}
|
| 350 |
if (!in_array($match, $old_matches)) {
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| 351 |
$array = array('sid' => $sid, 'rid' => $term->tid, 'type' => 'term');
|
| 352 |
drupal_write_record('facebook_status_tags', $array);
|
| 353 |
}
|
| 354 |
$old_matches[] = $match;
|
| 355 |
}
|
| 356 |
}
|
| 357 |
|
| 358 |
/**
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| 359 |
* Implementation of hook_facebook_status_delete().
|
| 360 |
*/
|
| 361 |
function facebook_status_tags_facebook_status_delete($sid) {
|
| 362 |
db_query("DELETE FROM {facebook_status_tags} WHERE sid = %d", $sid);
|
| 363 |
}
|
| 364 |
|
| 365 |
//===================
|
| 366 |
//OTHER INTEGRATIONS.
|
| 367 |
//===================
|
| 368 |
|
| 369 |
/**
|
| 370 |
* Implementation of hook_views_api().
|
| 371 |
*/
|
| 372 |
function facebook_status_tags_views_api() {
|
| 373 |
return array('api' => 2);
|
| 374 |
}
|
| 375 |
|
| 376 |
/**
|
| 377 |
* Implementation of hook_taxonomy().
|
| 378 |
*/
|
| 379 |
function facebook_status_tags_taxonomy($op, $type, $array = NULL) {
|
| 380 |
if ($op != 'delete') {
|
| 381 |
return;
|
| 382 |
}
|
| 383 |
if ($type == 'term') {
|
| 384 |
db_query("DELETE FROM {facebook_status_tags} WHERE rid = %d AND type = 'term'", $array['tid']);
|
| 385 |
}
|
| 386 |
else if ($type == 'vocabulary') {
|
| 387 |
if ($array['vid'] === variable_get('facebook_status_tags_vid', -1)) {
|
| 388 |
//If the vocabulary is deleted, all the tags will no longer exist, so the references are invalid.
|
| 389 |
db_query("DELETE FROM {facebook_status_tags} WHERE type = 'term'");
|
| 390 |
variable_set('facebook_status_tags_vid', -1);
|
| 391 |
}
|
| 392 |
}
|
| 393 |
}
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