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- <?php
- /**
- * @file
- * Provides node access permissions based on workflow states.
- */
- /**
- * Implements hook_workflow().
- *
- * Update grants when a node changes workflow state.
- * This is already called when node_save is called.
- */
- function workflow_access_workflow($op, $id, $new_sid, $entity, $force, $entity_type = '', $field_name = '', $transition = NULL) {
- // ALERT:
- // This is a tricky spot when called on node_insert as part of the transition from create to state1.
- // node_save invokes this function as a hook before calling node_access_acquire_grants.
- // But when it calls node_access_acquire_grants later, it does so without deleting the access
- // set when calling workflow_node_insert because it is an insert and no prior grants are expected.
- // This leads to a SQL error of duplicate grants which causes a rollback of all changes.
- // Unfortunately, setting access rights isn't the only thing we're doing on node_insert so we
- // can't skip the whole thing. So we need to fix it further downstream in order to get this to work.
- // Here we don't want to run this in the case of (and ONLY in the case of) a brand new node.
- // Node access grants will be run as part of node_save's own granting after this.
- //
- // NOTE: Any module that sets node access rights on insert will hit this situation.
- //
- switch ($op) {
- case 'transition post':
- // This is only used for Workflow Node.
- // In some other location, we make sure that 'transition post' is only
- // called for Workflow Node, never for Workflow Field. We do not need
- // that hook, since you can use the core event 'node_presave' and 'node_save'.
- // Node_access functions are only for nodes with a state change and a valid new state.
- if ($entity_type == 'node' && !isset($entity->is_new)) {
- node_access_acquire_grants($entity);
- }
- break;
- }
- }
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