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<?php
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// $Id: og_audience.module,v 1.6 2008/06/28 07:18:31 davidlesieur Exp $
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/**
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* Implementation of hook_perm().
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*/
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function og_audience_perm() {
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return array('change audience');
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}
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/**
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* Implementation of hook_menu().
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*/
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function og_audience_menu() {
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$items['admin/og/og-audience'] = array(
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'title' => 'OG Audience',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('og_audience_settings'),
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'access arguments' => array('administer site configuration'),
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);
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$items['node/%node/audience'] = array(
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'title' => 'Audience',
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'type' => MENU_LOCAL_TASK,
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'access callback' => 'og_audience_tab_access',
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'access arguments' => array(1),
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'page callback' => 'og_audience_page',
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'page arguments' => array(1),
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);
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return $items;
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}
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/**
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* Implementation of hook_block().
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*/
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function og_audience_block($op = 'list', $delta = 0) {
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switch ($op) {
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case 'list':
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$blocks = array();
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$blocks[0]['info'] = t('Organic group audience');
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$blocks[0]['cache'] = BLOCK_NO_CACHE;
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return $blocks;
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case 'view':
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if (user_access('change audience')) {
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global $user;
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if (arg(0) == 'node' && is_numeric(arg(1)) && !arg(2)) {
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$node = node_load(arg(1));
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if ($node &&
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og_is_group_post_type($node->type) &&
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count($user->og_groups) &&
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(count($node->og_groups) || variable_get('og_audience_allow_add', 1))) {
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$block['subject'] = t('Audience');
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$block['content'] = drupal_get_form('og_audience_build_form', $node);
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return $block;
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}
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}
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}
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break;
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}
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}
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/**
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* Menu callback function for settings form
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*/
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function og_audience_settings() {
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$form['og_audience_tab_enable'] = array(
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'#title' => t('Provide a tab'),
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'#type' => 'checkbox',
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'#default_value' => variable_get('og_audience_tab_enable', 1),
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'#description' => t('If this is enabled, an additional tab will appear on posts for users with the <em>change audience</em> permission. You may wish to disable this if you have enabled the block interface.'),
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);
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$form['og_audience_allow_add'] = array(
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'#title' => t('Posts with no audience may be added to a group'),
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'#type' => 'checkbox',
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'#default_value' => variable_get('og_audience_allow_add', 1),
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'#description' => t('If this is enabled, a user may add to a group a post that initially had no audience. Note that the user may also be able to determine whether the post will remain public.'),
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);
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return system_settings_form($form);
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}
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/**
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* Determine whether a user may access the audience page to perform audience
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* changes.
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*
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* @param $account
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* The user whose access needs to be verified. If empty, the current user is
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* checked.
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*/
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function og_audience_tab_access($node, $account = NULL) {
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global $user;
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if (empty($account)) {
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$account = $user;
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}
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return (
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variable_get('og_audience_tab_enable', 1) &&
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$node &&
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user_access('change audience') &&
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og_is_group_post_type($node->type) &&
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count($account->og_groups) &&
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(count($node->og_groups) || variable_get('og_audience_allow_add', 1))
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);
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}
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/**
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* Provide the audience management page.
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*/
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function og_audience_page($node) {
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drupal_set_title(t('Audience for %title', array('%title' => $node->title)));
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return drupal_get_form('og_audience_build_form', $node);
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}
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/**
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* Return the audience form for the given node and user.
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*/
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function og_audience_build_form(&$form_state, $node) {
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global $user;
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$type = node_get_types('name', $node);
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if (empty($node->og_groups)) {
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$node->og_groups = array();
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}
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$form['target_node'] = array(
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'#type' => 'value',
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'#value' => $node,
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);
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// Find groups the node could be added to.
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$add_to_options = _og_audience_add_to_options($node, $user);
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$form['og_audience_add'] = array(
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'#type' => 'fieldset',
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'#title' => t('Add'),
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);
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if ($count = count($add_to_options)) {
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$form['og_audience_add']['add_to'] = array(
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'#type' => $count >= 10 ? 'select' : 'checkboxes',
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'#title' => t('Add this %type to', array('%type' => $type)),
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'#options' => $add_to_options,
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'#multiple' => TRUE,
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);
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$submit = TRUE;
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// Only show the "Public" checkbox when the node is not in any group.
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if (empty($node->og_groups) && module_exists('og_access')) {
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og_access_alter_nongroup_form($form, $node);
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// Only an author/editor should be offered the visibility override.
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if (isset($form['og_nodeapi']['visible']['og_public']) && !node_access('update', $node) && !user_access('administer organic groups')) {
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// Not allowed to set visibility. Ensure that the post remains public,
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// because it was public in the first place by not belonging to any
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// group.
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unset($form['og_nodeapi']['visible']['og_public']);
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$form['og_nodeapi']['og_public'] = array('#type' => 'value', '#value' => 1);
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}
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}
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}
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else {
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$form['og_audience_add']['add_to'] = array(
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'#type' => 'value',
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'#value' => array(),
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);
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$form['og_audience_add']['add_to_message'] = array(
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'#type' => 'markup',
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'#value' => '<p>'. t('There are no groups you can add this %type to.', array('%type' => $type)) .'</p>',
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);
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}
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// Find groups the node could be removed from.
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$remove_from_options = _og_audience_remove_from_options($node, $user);
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$form['og_audience_remove'] = array(
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'#type' => 'fieldset',
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'#title' => t('Remove'),
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);
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if ($count = count($remove_from_options)) {
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$form['og_audience_remove']['remove_from'] = array(
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'#type' => $count >= 10 ? 'select' : 'checkboxes',
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'#title' => t('Remove this %type from', array('%type' => $type)),
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'#options' => $remove_from_options,
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'#multiple' => TRUE,
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);
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$submit = TRUE;
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}
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else {
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$form['og_audience_remove']['remove_from'] = array(
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'#type' => 'value',
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'#value' => array(),
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);
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$form['og_audience_remove']['remove_from_message'] = array(
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'#type' => 'markup',
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'#value' => '<p>'. t('There are no groups you can remove this %type from.', array('%type' => $type)) .'</p>',
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);
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}
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if ($submit) {
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$form['submit'] = array(
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'#type' => 'submit',
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'#value' => t('Submit'),
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);
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}
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return $form;
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}
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/**
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* Form submit handler.
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*/
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function og_audience_build_form_submit($form, &$form_state) {
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global $user;
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$changed = FALSE;
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$node = $form_state['values']['target_node'];
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// Add array_filter in case we're using checkboxes
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$add_to = array_keys(array_filter($form_state['values']['add_to']));
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$remove_from = array_keys(array_filter($form_state['values']['remove_from']));
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$type = node_get_types('name', $node);
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if (count($add_to)) {
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foreach ($add_to as $gid) {
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$node->og_groups[] = $gid;
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drupal_set_message(t('The %type has been added to %group.', array('%type' => $type, '%group' => $user->og_groups[$gid]['title'])));
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}
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// This should only be set if the node was part of no groups previously.
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if (isset($form_state['values']['og_public'])) {
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$node->og_public = $form_state['values']['og_public'];
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}
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$changed = TRUE;
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}
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if (count($remove_from)) {
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$node->og_groups = array_diff($node->og_groups, $form_state['values']['remove_from']);
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$required = variable_get('og_audience_required', 0) && !user_access('administer nodes');
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if (empty($node->og_groups) && $required) {
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form_set_error('remove_form', t('You must leave at least one group selected for the %type.', array('%type' => $type)));
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}
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else {
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foreach ($remove_from as $gid) {
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drupal_set_message(t('The %type has been removed from %group.', array('%type' => $type, '%group' => $user->og_groups[$gid]['title'])));
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}
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$changed = TRUE;
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}
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}
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if ($changed) {
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og_save_ancestry($node);
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node_access_acquire_grants($node);
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cache_clear_all();
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}
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}
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/**
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* Find groups a node could be added to by the given user (assuming that the
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* user has the permission for doing so).
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*
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* @return
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* Array of options.
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*/
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function _og_audience_add_to_options($node, $user) {
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$options = array();
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$groups = array_diff(array_keys($user->og_groups), $node->og_groups);
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if (count($groups)) {
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foreach ($groups as $gid) {
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$options[$gid] = $user->og_groups[$gid]['title'];
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}
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}
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return $options;
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}
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/**
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* Find groups a node could be removed from by the given user.
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*
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* Only group administrators and the node's author are allowed to remove content
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* from a group.
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*
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* @return
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* Array of options.
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*/
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function _og_audience_remove_from_options($node, $user) {
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$options = array();
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$groups = array_intersect($node->og_groups, array_keys($user->og_groups));
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if (count($groups)) {
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foreach ($groups as $gid) {
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if ($user->og_groups[$gid]['is_admin'] || node_access('update', $node)) {
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$options[$gid] = $user->og_groups[$gid]['title'];
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}
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}
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}
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return $options;
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}
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