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<?php
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/**
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* @file
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* Menu callbacks for the Flag module.
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*/
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/**
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* Menu callback for (un)flagging a node.
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*
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* Used both for the regular callback as well as the JS version.
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*
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* @param $action
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* Either 'flag' or 'unflag'.
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*/
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function flag_page($action, $flag, $entity_id) {
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global $user;
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// Shorten up the variables that affect the behavior of this page.
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$js = isset($_REQUEST['js']);
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$token = $_REQUEST['token'];
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// Specifically $_GET to avoid getting the $_COOKIE variable by the same key.
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$has_js = isset($_GET['has_js']);
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// Check the flag token, and then javascript status.
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if (!flag_check_token($token, $entity_id)) {
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$flag->errors['token'] = t('Bad token. You seem to have followed an invalid link.');
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}
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elseif ($user->uid == 0 && !$has_js) {
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$flag->errors['javascript'] = t('You must have JavaScript and cookies enabled in your browser to flag content.');
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}
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// If no errors have been detected thus far, perform the flagging.
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// Further errors may still be detected during validation and prevent
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// the operation from succeeding.
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if (!$flag->errors) {
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$flag->flag($action, $entity_id);
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}
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// If successful, return data according to the request type.
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if ($js) {
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drupal_add_http_header('Content-Type', 'text/javascript; charset=utf-8');
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$flag->link_type = 'toggle';
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// Any errors that have been set will be output below
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// the flag link with javascript.
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print drupal_json_encode(flag_build_javascript_info($flag, $entity_id));
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drupal_exit();
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}
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else {
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$errors = $flag->get_errors();
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if ($errors) {
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// If an error was received, set a message and exit.
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foreach ($errors as $error) {
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drupal_set_message($error, 'error');
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}
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if (isset($errors['access-denied'])) {
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return MENU_ACCESS_DENIED;
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}
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else {
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drupal_goto();
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}
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}
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else {
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drupal_set_message($flag->get_label($action . '_message', $entity_id));
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drupal_goto();
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}
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}
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}
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/**
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* Form for confirming the (un)flagging of an entity.
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*
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* @param $action
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* Either 'flag' or 'unflag'.
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* @param $flag
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* A loaded flag object.
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* @param $entity_id
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* The id of the entity to operate on. The type is implicit in the flag.
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*
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* @see flag_confirm_submit()
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*/
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function flag_confirm($form, &$form_state, $action, $flag, $entity_id) {
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$form['#flag'] = $flag;
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$form['action'] = array(
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'#type' => 'value',
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'#value' => $action,
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);
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$form['entity_id'] = array(
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'#type' => 'value',
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'#value' => $entity_id,
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);
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$question = $flag->get_label($action . '_confirmation', $entity_id);
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$path = isset($_GET['destination']) ? $_GET['destination'] : '<front>';
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$yes = $flag->get_label($action . '_short', $entity_id);
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if ($action == 'flag') {
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// If the action 'flag', we're potentially about to create a new
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// flagging entity. We need an empty new entity to pass to FieldAPI.
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$flagging = $flag->new_flagging($entity_id);
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field_attach_form('flagging', $flagging, $form, $form_state);
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$form['#flagging'] = $flagging;
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}
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return confirm_form($form, $question, $path, '', $yes);
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}
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/**
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* Submit handler for the flag confirm form.
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*
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* Note that validating whether the user may perform the action is done here,
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* rather than in a form validation handler.
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*
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* @see flag_confirm()
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*/
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function flag_confirm_submit(&$form, &$form_state) {
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$flag = $form['#flag'];
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$action = $form_state['values']['action'];
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$entity_id = $form_state['values']['entity_id'];
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if ($action == 'flag') {
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// If the action 'flag', further build up the new entity from form values.
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$flagging = $form['#flagging'];
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entity_form_submit_build_entity('flagging', $flagging, $form, $form_state);
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$result = $flag->flag($action, $entity_id, NULL, FALSE, $flagging);
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}
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else {
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$result = $flag->flag($action, $entity_id, NULL, FALSE);
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}
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if (!$result) {
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if ($errors = $flag->get_errors()) {
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foreach ($errors as $error) {
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drupal_set_message($error, 'error');
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}
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}
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}
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else {
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drupal_set_message($flag->get_label($action . '_message', $entity_id));
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}
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}
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/**
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* Builds the JavaScript structure describing the flagging operation.
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*/
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function flag_build_javascript_info($flag, $entity_id) {
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$errors = $flag->get_errors();
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$info = array(
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'status' => TRUE,
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'newLink' => $flag->theme($flag->is_flagged($entity_id) ? 'unflag' : 'flag', $entity_id, array(
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'after_flagging' => TRUE,
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'errors' => $errors,
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)),
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// Further information for the benefit of custom JavaScript event handlers:
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'flagSuccess' => !$errors,
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'contentId' => $entity_id,
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'entityType' => $flag->entity_type,
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'flagName' => $flag->name,
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'flagStatus' => $flag->is_flagged($entity_id) ? 'flagged' : 'unflagged',
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);
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drupal_alter('flag_javascript_info', $info, $flag);
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return $info;
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}
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