user_relationship_node_access.module in User Relationships 5.3

File

user_relationship_node_access/user_relationship_node_access.module

<?php

// Copyright (C) 2008 Jonathan Brown
// http://openpackage.biz/

/**
 * hook_enable()
 */
function user_relationship_node_access_enable() {
  node_access_rebuild();
}

/**
 * hook_disable()
 */
function _user_relationship_node_access_disable() {
  _user_relationship_node_access_disabling(TRUE);
  node_access_rebuild();
}

/**
 * helper function to make sure we don't set up permissions if we're disabling
 */
function _user_relationship_node_access_disabling($set = NULL) {
  static $disabling = FALSE;
  if ($set !== NULL) {
    $disabling = $set;
  }
  return $disabling;
}

/**
 * hook_form_alter()
 */
function user_relationship_node_access_form_alter($form_id, &$form) {
  global $user;
  if ($form['#node'] && $form['#node']->uid != $user->uid) {
    return;
  }
  if ((is_null($form['type']) || $form['type']['#value'] . '_node_form' != $form_id) && $form_id != 'node_type_form' || !count($types = user_relationships_types_load())) {
    return;
  }

  // Node form
  if ($form_id != 'node_type_form') {
    $form['user_relationship_node_access'] = array(
      '#type' => 'fieldset',
      '#title' => t('User Relationships Node Access'),
      '#description' => t('Node access based on your relationships to other users'),
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#tree' => TRUE,
      '#theme' => 'user_relationship_node_access_form',
    );
    foreach ($types as $rtid => $type) {
      unset($types[$rtid]);
      if ($type->is_oneway) {
        $types["{$rtid}_yt"] = t('@type (you to them)', array(
          '@type' => $type->plural_name,
        ));
        $types["{$rtid}_ty"] = t('@type (them to you)', array(
          '@type' => $type->plural_name,
        ));
      }
      else {
        $types[$rtid] = $type->plural_name;
      }
    }
    asort($types);

    // reverse the optimization made after saving
    $permissions = array();
    if (is_array($form['#node']->user_relationship_node_access)) {
      foreach ($form['#node']->user_relationship_node_access as $rtid => $permission) {
        foreach ($permission as $action => $trash) {
          $permissions[$action][$rtid] = $rtid;
        }
      }
    }
    $form['user_relationship_node_access'] = array(
      '#type' => 'fieldset',
      '#title' => t('User Relationships Node Access'),
      '#description' => t('Node access based on your relationships to other users'),
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#tree' => TRUE,
    );
    foreach (array(
      'view',
      'update',
      'delete',
    ) as $action) {
      $form['user_relationship_node_access'][$action] = array(
        '#type' => 'checkboxes',
        '#multiple' => TRUE,
        '#options' => $types,
        '#title' => t(ucfirst($action)),
        '#default_value' => $permissions[$action],
        '#description' => t('If no box is ticked, then anyone can @action.', array(
          '@action' => $action,
        )),
      );
    }
  }
}

/**
 * hook_nodeapi()
 */
function user_relationship_node_access_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
  global $user;
  if ($node->uid != $user->uid) {
    return;
  }
  switch ($op) {
    case 'insert':
    case 'update':
      if (isset($node->user_relationship_node_access)) {

        // reformat the array and optimize
        $user_relationship_node_access = array();
        foreach ($node->user_relationship_node_access as $action => $permissions) {
          foreach ($permissions as $key => $permission) {
            if ($permission) {
              $user_relationship_node_access[$key][$action] = TRUE;
            }
          }
        }
        db_query("DELETE FROM {user_relationship_node_access} WHERE nid = %d", $node->nid);
        db_query("INSERT INTO {user_relationship_node_access} (nid, permissions) VALUES (%d, '%s')", $node->nid, serialize($user_relationship_node_access));
        $node->user_relationship_node_access = $user_relationship_node_access;
      }
      break;
    case 'load':
      $node->user_relationship_node_access = unserialize(db_result(db_query("SELECT permissions FROM {user_relationship_node_access} WHERE nid = %d", $node->nid)));
      break;
    case 'delete':
      db_query("DELETE FROM {user_relationship_node_access} WHERE nid = %d", $node->nid);
      break;
  }
}

/**
 * hook_node_grants()
 */
function user_relationship_node_access_node_grants($user, $op) {

  // get this user's relationships
  $relationships = user_relationships_load(array(
    'user' => $user->uid,
    'approved' => TRUE,
  ));
  foreach ($relationships as $relationship) {
    $author_uid = $relationship->requestee_id == $user->uid ? $relationship->requester_id : $relationship->requestee_id;
    if ($relationship->is_oneway) {
      $grants["user_relationship_node_access_{$relationship->rtid}_yt"][] = $relationship->requester_id;
      $grants["user_relationship_node_access_{$relationship->rtid}_ty"][] = $relationship->requestee_id;
    }
    else {
      $grants["user_relationship_node_access_{$relationship->rtid}"][] = $author_uid;
    }
  }
  $grants['user_relationship_node_access_author'] = array(
    $user->uid,
  );
  return $grants;
}

/** 
 * hook_access_records()
 */
function user_relationship_node_access_node_access_records($node) {
  if (_user_relationship_node_access_disabling()) {
    return;
  }
  if (is_array($node->user_relationship_node_access)) {
    foreach ($node->user_relationship_node_access as $rtid => $permissions) {
      $grants[] = array(
        'realm' => "user_relationship_node_access_{$rtid}",
        'gid' => $node->uid,
        'grant_view' => $permissions['view'],
        'grant_update' => $permissions['update'],
        'grant_delete' => $permissions['delete'],
      );
    }
  }
  if (count($grants)) {
    $grants[] = array(
      'realm' => 'user_relationship_node_access_author',
      'gid' => $node->uid,
      'grant_view' => TRUE,
      'grant_update' => TRUE,
      'grant_delete' => TRUE,
    );
  }
  return $grants;
}

Functions

Name	Description
user_relationship_node_access_enable	hook_enable()
user_relationship_node_access_form_alter	hook_form_alter()
user_relationship_node_access_nodeapi	hook_nodeapi()
user_relationship_node_access_node_access_records	hook_access_records()
user_relationship_node_access_node_grants	hook_node_grants()
_user_relationship_node_access_disable	hook_disable()
_user_relationship_node_access_disabling	helper function to make sure we don't set up permissions if we're disabling