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<?php
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/**
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* @file
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* Provides various callbacks for the whole core module integration.
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* This is a copy of Entity API's functionality for use when Entity API isn't
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* Enabled, and only works on view functions.
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*/
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/**
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* Core hack to include entity api-esque 'access callback' functions to core
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* entities without needing to rely on entity api.
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* Exception: We don't touch file entity. You must have entity API enabled to
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* view files.
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*/
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function _ctools_entity_access(&$entity_info, $entity_type) {
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// If the access callback is already set, don't change anything.
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if (isset($entity_info['access callback'])) {
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return;
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}
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switch ($entity_type) {
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case 'node':
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// Sad panda, we don't use Entity API, lets manually add access callbacks.
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$entity_info['access callback'] = 'ctools_metadata_no_hook_node_access';
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break;
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case 'user':
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$entity_info['access callback'] = 'ctools_metadata_user_access';
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break;
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case 'comment':
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if (module_exists('comment')) {
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$entity_info['access callback'] = 'ctools_metadata_comment_access';
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}
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break;
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case 'taxonomy_term':
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if (module_exists('taxonomy')) {
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$entity_info['access callback'] = 'ctools_metadata_taxonomy_access';
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}
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break;
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case 'taxonomy_vocabulary':
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if (module_exists('taxonomy')) {
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$entity_info['access callback'] = 'ctools_metadata_taxonomy_access';
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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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* Access callback for the node entity.
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*
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* This function does not implement hook_node_access(), thus it may not be
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* called ctools_metadata_node_access().
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*
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* @see entity_access()
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*
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* @param $op
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* The operation being performed. One of 'view', 'update', 'create' or
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* 'delete'.
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* @param $node
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* A node to check access for. Must be a node object. Must have nid,
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* except in the case of 'create' operations.
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* @param $account
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* The user to check for. Leave it to NULL to check for the global user.
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*
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* @throws EntityMalformedException
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*
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* @return bool
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* TRUE if access is allowed, FALSE otherwise.
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*/
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function ctools_metadata_no_hook_node_access($op, $node = NULL, $account = NULL) {
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// First deal with the case where a $node is provided.
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if (isset($node)) {
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// If a non-default revision is given, incorporate revision access.
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$default_revision = node_load($node->nid);
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if ($node->vid !== $default_revision->vid) {
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return _node_revision_access($node, $op, $account);
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}
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else {
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return node_access($op, $node, $account);
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}
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}
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// No node is provided. Check for access to all nodes.
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if (user_access('bypass node access', $account)) {
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return TRUE;
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}
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if (!user_access('access content', $account)) {
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return FALSE;
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}
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if ($op == 'view' && node_access_view_all_nodes($account)) {
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Access callback for the user entity.
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*/
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function ctools_metadata_user_access($op, $entity = NULL, $account = NULL, $entity_type) {
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$account = isset($account) ? $account : $GLOBALS['user'];
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// Grant access to the users own user account and to the anonymous one.
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if (isset($entity) && $op != 'delete' && (($entity->uid == $account->uid && $entity->uid) || (!$entity->uid && $op == 'view'))) {
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return TRUE;
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}
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if (user_access('administer users', $account) || user_access('access user profiles', $account) && $op == 'view' && $entity->status) {
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Access callback for the comment entity.
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*/
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function ctools_metadata_comment_access($op, $entity = NULL, $account = NULL) {
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// When determining access to a comment, if comment has an associated node,
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// the user must be able to view the node in order to access the comment.
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if (isset($entity->nid)) {
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if (!node_access('view', node_load($entity->nid), $account)) {
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return FALSE;
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}
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}
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// Comment administrators are allowed to perform all operations on all
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// comments.
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if (user_access('administer comments', $account)) {
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return TRUE;
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}
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// Unpublished comments can never be accessed by non-admins.
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if (isset($entity->status) && $entity->status == COMMENT_NOT_PUBLISHED) {
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return FALSE;
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}
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if (user_access('access comments', $account) && $op == 'view') {
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Access callback for the taxonomy entities.
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*/
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function ctools_metadata_taxonomy_access($op, $entity = NULL, $account = NULL, $entity_type) {
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if ($entity_type == 'taxonomy_vocabulary') {
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return user_access('administer taxonomy', $account);
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}
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if (user_access('administer taxonomy', $account) || user_access('access content', $account) && $op == 'view') {
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return TRUE;
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}
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return FALSE;
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}
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