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<?php
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// $Id: workflow_access.module,v 1.6 2006/09/09 17:30:12 merlinofchaos Exp $
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/**
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* @file workflow_access.module
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*
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* This module is a demo of the na_arbitrator module, to create access permissions
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* that exist only for workflows.
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*
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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 workflow_access_help($section) {
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switch($section) {
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case 'admin/modules#description':
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return t('workflow access allows role-based access permissions to workflows.');
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}
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}
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/**
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* This function supplies the workflow access grants. workflow_access simply uses
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* roles as ACLs, so rids translate directly to gids.
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*/
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function workflow_access_node_grants($user, $op) {
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$grants['workflow_access'] = array_keys($user->roles);
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$grants['workflow_access_owner'] = array($user->uid);
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return $grants;
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}
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/**
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* Implementation of hook_node_access_grants
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*
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* Returns a list of grant records for the passed in node object.
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*/
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function workflow_access_node_access_grants($node) {
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$sid = db_result(db_query("SELECT sid FROM {workflow_node} WHERE nid = %d", $node->nid));
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if (is_numeric($sid)) {
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$result = db_query('SELECT * FROM {workflow_access} WHERE sid = %d', $sid);
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while ($grant = db_fetch_object($result)) {
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if ($grant->rid == -1) {
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$realm = 'workflow_access_owner';
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$gid = $node->uid;
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}
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else {
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$realm = 'workflow_access';
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$gid = $grant->rid;
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}
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$realm = $grant->rid != -1 ? 'workflow_access' : 'workflow_access_owner';
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$gid =
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$grants[] = array('realm' => $realm, 'gid' => $gid, 'grant_view' => $grant->grant_view, 'grant_update' => $grant->grant_update, 'grant_delete' => $grant->grant_delete);
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}
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}
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return $grants;
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}
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/**
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* Implementation of hook_form_alter()
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*
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* Remove inaccessible workflows from the node form.
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*/
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function workflow_access_form_alter($form_id, &$form) {
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if ($form_id == 'workflow_edit') {
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workflow_access_workflow_form($form_id, $form);
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}
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// hunmonk's module dependency check: see http://drupal.org/node/54463
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if ($form_id == 'system_modules' && !$_POST) {
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workflow_access_system_module_validate($form);
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}
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}
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/**
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* hunmonk's module dependency check: see http://drupal.org/node/54463
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*/
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function workflow_access_system_module_validate(&$form) {
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$module = 'workflow_access';
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$dependencies = array('na_arbitrator', 'workflow');
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foreach ($dependencies as $dependency) {
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if (!in_array($dependency, $form['status']['#default_value'])) {
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$missing_dependency = TRUE;
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$missing_dependency_list[] = $dependency;
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}
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}
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if (in_array($module, $form['status']['#default_value']) && isset($missing_dependency)) {
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db_query("UPDATE {system} SET status = 0 WHERE type = 'module' AND name = '%s'", $module);
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$key = array_search($module, $form['status']['#default_value']);
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unset($form['status']['#default_value'][$key]);
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drupal_set_message(t('The module %module was deactivated--it requires the following disabled/non-existent modules to function properly: %dependencies', array('%module' => $module, '%dependencies' => implode(', ', $missing_dependency_list))), 'error');
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}
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}
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/**
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* Add our items to the workflow edit form.
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*/
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function workflow_access_workflow_form($form_id, &$form) {
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$wid = $form['wid']['#value'];
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$rids = array('-1' => t('author'));
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$result = db_query("SELECT r.rid, r.name FROM {role} r ORDER BY r.name");
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while ($obj = db_fetch_object($result)) {
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$rids[$obj->rid] = $obj->name;
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}
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$states = workflow_get_states($wid);
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$form['workflow_access'] = array('#type' => 'fieldset',
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'#title' => t('Access control'),
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'#collapsible' => TRUE,
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'#tree' => TRUE,
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);
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foreach ($states as $sid => $state) {
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$view = $update = $delete = array();
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$result = db_query("SELECT * from {workflow_access} where sid=%d", $sid);
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if (db_num_rows($result) == 0) {
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$view = array(1, 2);
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}
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while ($fa = db_fetch_object($result)) {
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if ($fa->grant_view) {
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$view[] = $fa->rid;
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}
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if ($fa->grant_update) {
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$update[] = $fa->rid;
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}
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if ($fa->grant_delete) {
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$delete[] = $fa->rid;
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}
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}
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$form['workflow_access'][$sid] = array('#type' => 'fieldset',
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'#title' => $state,
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'#collapsible' => TRUE,
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'#tree' => TRUE,
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);
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$form['workflow_access'][$sid]['view'] = array('#type' => 'checkboxes',
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'#options' => $rids,
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'#default_value' => $view,
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'#title' => t('Roles who can view posts in this state'),
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'#prefix' => "<table width=100% border=0><tr><td>",
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);
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$form['workflow_access'][$sid]['update'] = array('#type' => 'checkboxes',
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'#options' => $rids,
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'#default_value' => $update,
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'#title' => t('Roles who can edit posts in this state'),
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'#prefix' => "</td><td>",
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);
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$form['workflow_access'][$sid]['delete'] = array('#type' => 'checkboxes',
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'#options' => $rids,
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'#default_value' => $delete,
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'#title' => t('Roles who can delete posts in this state'),
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'#prefix' => "</td><td>",
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'#suffix' => "</td></tr></table>",
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);
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}
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// Move some stuff down so our block goes in a nice place.
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$form['submit']['#weight'] = 10;
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$form['#submit']['workflow_access_form_submit'] = current($form['#submit']);
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$form['#submit']['workflow_access_form_submit'][0] = 'workflow_access_form_submit';
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}
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function workflow_access_form_submit($form_id, $form_values) {
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foreach($form_values['workflow_access'] as $sid => $access) {
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if (!is_numeric($sid)) {
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continue; // ignore keys that ain't us.
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}
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$grants = array();
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db_query("DELETE FROM {workflow_access} WHERE sid = %d", $sid);
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foreach($access['view'] as $rid => $checked) {
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if ($rid == -1) {
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$realm = 'workflow_access_owner';
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$gid = $node->uid;
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}
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else {
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$realm = 'workflow_access';
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$gid = $rid;
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}
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$grants[] = array(
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'realm' => $realm,
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'gid' => $gid,
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'grant_view' => (bool) $checked,
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'grant_update' => (bool) $access['update'][$rid],
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'grant_delete' => (bool) $access['delete'][$rid],
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);
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db_query("INSERT INTO {workflow_access} (sid, rid, grant_view, grant_update, grant_delete) VALUES (%d, %d, %d, %d, %d)", $sid, $rid, (bool) $checked, (bool) $access['update'][$rid], (bool) $access['delete'][$rid]);
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}
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// mass update
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$result = db_query("SELECT n.nid FROM {node} n LEFT JOIN {workflow_node} wn ON wn.nid = n.nid WHERE wn.sid = %d", $sid);
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while ($node = db_fetch_object($result)) {
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na_arbitrator_acquire_grants(node_load($node->nid), $grants, 'workflow_access');
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}
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}
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}
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/**
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* be sure to update grants when a node changes workflow; we had at one
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* point set that to call node_save, but that turned out to be the
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* wrong behavior.
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*/
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function workflow_access_workflow($op, $old_sid, $sid, $node) {
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if ($op == 'transition post' && $old_sid != $sid) {
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na_arbitrator_acquire_grants($node);
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}
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}
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