<?php
// $Id: moderation.module,v 1.1 2009-04-21 12:19:02 sanduhrs Exp $

/**
 * @file
 * Moderation - nodes and comments queue
 *
 * @author
 * Stefan Auditor <stefan.auditor@erdfisch.de>
 */

/**
 * Implementation of hook_menu().
 */
function moderation_menu($may_cache) {
  $items = array();
  
  if ($may_cache) {
    $items[] = array(
      'path' => 'admin/content/node/moderation',
      'title' => t('Moderation'),
      'callback' => 'moderation_node_queue',
      'access' => user_access('administer nodes'),
      'type' => MENU_LOCAL_TASK,
    );
    $items[] = array(
      'path' => 'admin/content/comment/list/moderation',
      'title' => t('Moderation'),
      'callback' => 'moderation_comment_queue',
      'access' => user_access('administer comments'),
      'type' => MENU_LOCAL_TASK,
    );
  }
  else {
    $access = (arg(1) == 'node' AND user_access('administer nodes')) || (arg(1) == 'comment' AND user_access('administer comments')) ? TRUE : FALSE;
    $items[] = array(
      'path' => 'moderation',
      'callback' => 'moderation_callback_switch',
      'callback arguments' => array(arg(1), arg(2), arg(3), arg(4)),
      'access' => $access,
      'type' => MENU_CALLBACK,
    );
  }

  return $items;
}

/**
 * 
 */
function moderation_callback_switch($obj_type, $obj_id, $op, $attribute) {
  $attributes = array('status', 'promote', 'sticky', 'moderate', 'preview');
  $types      = array('node', 'comment');
  
  if (!is_numeric($obj_id) OR !in_array($obj_type, $types) OR !in_array($attribute, $attributes)) {
    return drupal_not_found();
  }
  
  if ($op == 'get') {
    if ($attribute == 'preview') {
      moderation_get_preview($obj_id, $obj_type);
    }
    else {
      moderation_get_attribute($obj_id, $obj_type, $attribute);
    }
    exit();
  }
  
  if ($op == 'set') {
    switch ($attribute) {
      case 'status':
      case 'promote':
      case 'sticky':
        moderation_switch_attribute($obj_id, $obj_type, $attribute);
        break;
      case 'moderate':
        moderation_switch_moderation($obj_id, $obj_type);
        break;
    }
  }
  
  return drupal_not_found();
}

/**
 * Implementation of hook_nodeapi
 */
function moderation_nodeapi(&$node, $op, $teaser = NULL, $page = NULL) {
  switch ($op) {
    case 'load':
      return db_fetch_array(db_query("SELECT status as moderate FROM {moderation_moderation} zm WHERE zm.obj_type = 'node' AND zm.obj_id = %d", $node->nid)); 
    case 'update' :
    case 'insert' :
      db_query("DELETE FROM {moderation_moderation} WHERE obj_id=%d AND obj_type='node'", $node->nid);
      db_query("INSERT INTO {moderation_moderation} SET obj_id=%d, obj_type='node', status=%d", $node->nid, $node->moderate);
      break;
    case 'delete':
      db_query("DELETE FROM {moderation} WHERE obj_type='node' AND obj_id=%d", $node->nid);
      db_query("DELETE FROM {moderation_moderation} WHERE obj_type='node' AND obj_id=%d", $node->nid);
      break;
  }
}

/**
 * Implementation of hook_comment().
 */
function moderation_comment(&$a1, $op) {
  switch ($op) {
    case 'insert':
    case 'update':
      db_query("DELETE FROM {moderation_moderation} WHERE obj_id=%d AND obj_type='comment'", $a1['cid']);
      db_query("INSERT INTO {moderation_moderation} SET obj_id=%d, obj_type='comment', status=%d", $a1['cid'], $a1['moderate']);
      break;
    case 'delete':
      db_query("DELETE FROM {moderation} WHERE obj_type='comment' AND obj_id=%d", $a1['cid']);
      db_query("DELETE FROM {moderation_moderation} WHERE obj_type='comment' AND obj_id=%d", $a1['cid']);
      break;
  }
}

/**
 * Implementation of hook_form_alter().
 */
function moderation_form_alter($form_id, &$form) {
  if (isset($form['type']) && $form['type']['#value'] .'_node_form' == $form_id)  {
    if (user_access('administer nodes')) {
      $form['moderate'] = array(
        '#type' => 'checkbox', 
        '#title' => t('Has been moderated'), 
        '#default_value' => $form['#node']->moderate,
        '#weight' => -10,
        '#description' => t('Check to remove from moderation queue, uncheck to add it to the queue.'),
      );
    }
  }

  if ($form_id == 'comment_form') {
    if (user_access('administer nodes')) {
      $status = db_result(db_query("SELECT status FROM {moderation_moderation} WHERE obj_id=%d AND obj_type='comment'", $form['cid']['#value']));
      $form['moderate'] = array(
        '#type' => 'checkbox',
        '#title' => 'Has been moderated',
        '#default_value' => $status,
        '#weight' => -10,
        '#description' => t('Check to remove from moderation queue, uncheck to add it to the queue.'),
      );
    }
  }
}

/**
 * Menu callback: content administration.
 */
function moderation_node_queue() {
  drupal_add_css(drupal_get_path('module', 'moderation') .'/moderation_node.css');
  drupal_add_js(drupal_get_path('module', 'moderation') .'/moderation_node.js');

  $query = "SELECT n.*, u.name, u.uid, zm.status as moderate FROM {node} n  
              INNER JOIN {users} u ON n.uid = u.uid
              LEFT JOIN {moderation_moderation} zm ON n.nid = zm.obj_id
                WHERE zm.obj_type = 'node'
                  AND (zm.status IS NULL OR zm.status=0)
                  AND n.type IN ('letter', 'post', 'poll', 'imagecontestimage') 
                ORDER BY n.created DESC";
  $result = pager_query($query, 50);
  
  $destination = drupal_get_destination();
  
  while ($node = db_fetch_object($result)) {
    $query = "SELECT z.uid, z.created, u.name FROM {moderation} z  
                LEFT JOIN {users} u ON z.uid = u.uid
                WHERE obj_id=%d
                  AND obj_type='node'
                ORDER BY z.created DESC
                LIMIT 1";
    $moderation = db_fetch_object(db_query($query, $node->nid));
    
    $item = '<div id="moderation-node-'. $node->nid .'" class="moderation-node clear-block container-inline">';
    $item .= '<div id="moderation-title-'. $node->nid .'" class="moderation-title title">';
    $item .= format_date($node->created, 'small') .' ';
    $item .= l($node->title, 'node/'. $node->nid) .' ';
    $item .= theme('mark', node_mark($node->nid, $node->changed));
    if ($moderation) {
      $item .= ' <div class="moderation-moderation" title="'. t('Last status change') .'">'. t('(!user !date)', array('!user' => theme('username', (object) array('uid' => $moderation->uid, 'name' => $moderation->name)), '!date' => format_date($moderation->created, 'small'))) .'</div>';
    }
    $item .= '</div>';
    $item .= '</div>';
    
    $item .= '<div id="moderation-info-'. $node->nid .'" class="moderation-info clear-block">';
    $item .= '  <span id="moderation-operations-'. $node->nid .'" class="moderation-attribute moderation-operations">'. l(t('edit'), 'node/'. $node->nid .'/edit', array('target' => '_blank'), $destination) .'</span>';
    $item .= '  <span id="moderation-username-'. $node->nid .'" class="moderation-attribute moderation-username">'. t('By !user', array('!user' => theme('username', $node))) .'</span>';
    $item .= '  <span id="moderation-name-'. $node->nid .'" class="moderation-attribute moderation-name">'. check_plain(node_get_types('name', $node)) .'</span>';
    $item .= '  <span id="moderation-status-'. $node->nid .'" class="moderation-attribute moderation-status">'. ($node->status   ? t('published') : t('not published')) .'</span>';
    $item .= '  <span id="moderation-promote-'. $node->nid .'" class="moderation-attribute moderation-promote">'. ($node->promote  ? t('promoted')  : t('not promoted')) .'</span>';
    $item .= '  <span id="moderation-sticky-'. $node->nid .'" class="moderation-attribute moderation-sticky">'. ($node->sticky   ? t('sticky')    : t('not sticky')) .'</span>';
    $item .= '  <span id="moderation-moderate-'. $node->nid .'" class="moderation-attribute moderation-moderate">'. ($node->moderate ? t('moderated') : t('not moderated')) .'</span>';
    $item .= '</div>';
    
    $rows[] = array('data' => 
      array(
        array(
          'data' => $item,
        ), 
      )
    );
  }
  
  if (!db_num_rows($result)) {
    $output = t('No posts available.');
  }
  
  $output .= theme('table', array(), $rows);
  $output .= theme('pager', NULL, 50);
  
  return $output;
}

/**
 * Menu callback; present an administrative comment listing.
 */
function moderation_comment_queue() {
  drupal_add_css(drupal_get_path('module', 'moderation') .'/moderation_comment.css');
  drupal_add_js(drupal_get_path('module', 'moderation') .'/moderation_comment.js');
  
  $result = pager_query("SELECT c.*, zm.status as moderate FROM {comments} c 
                           LEFT JOIN {moderation_moderation} zm ON c.cid = zm.obj_id
                           WHERE zm.obj_type = 'comment'
                             AND (zm.status IS NULL OR zm.status=0)
                           ORDER BY c.timestamp DESC", 50);
  $destination = drupal_get_destination();
  
  while ($comment = db_fetch_object($result)) {
    $query = "SELECT z.uid, z.created, u.name FROM {moderation} z  
                LEFT JOIN {users} u ON z.uid = u.uid
                WHERE z.obj_id=%d
                  AND z.obj_type='comment'
                ORDER BY z.created DESC
                LIMIT 1";
    $moderation = db_fetch_object(db_query($query, $comment->cid));
    
    $item = '<div id="moderation-comment-'. $comment->cid .'" class="moderation-comment clear-block container-inline">';
    $item .= '<div id="moderation-title-'. $comment->cid .'" class="moderation-title title">';
    $item .= format_date($comment->timestamp, 'small') .' ';
    $item .= l($comment->subject, 'node/'. $comment->nid, array(), NULL, 'comment-'. $comment->cid) .' ';
    $item .= theme('mark', node_mark($comment->cid, $comment->changed));
    if ($moderation) {
      $item .= ' <div class="moderation-moderation" title="'. t('Last status change') .'">'. t('(!user !date)', array('!user' => theme('username', (object) array('uid' => $moderation->uid, 'name' => $moderation->name)), '!date' => format_date($moderation->created, 'small'))) .'</div>';
    }
    $item .= '</div>';
    $item .= '</div>';
    
    $item .= '<div id="moderation-info-'. $comment->cid .'" class="moderation-info clear-block">';
    $item .= '  <span id="moderation-operations-'. $comment->cid .'" class="moderation-attribute moderation-operations">'. l(t('edit'), 'comment/edit/'. $comment->cid, array('target' => '_blank'), $destination) .'</span>';
    $item .= '  <span id="moderation-username-'. $comment->cid .'" class="moderation-attribute moderation-username">'. t('By !user', array('!user' => theme('username', $comment))) .'</span>';
    $item .= '  <span id="moderation-moderate-'. $comment->cid .'" class="moderation-attribute moderation-moderate">'. ($comment->moderate ? t('moderated') : t('not moderated')) .'</span>';
    $item .= '  <span id="moderation-status-'. $comment->cid .'" class="moderation-attribute moderation-status">'. ($comment->status   ? t('not published') : t('published')) .'</span>';
    $item .= '</div>';
    
    $rows[] = array('data' => 
      array(
        array(
          'data' => $item,
        ), 
      )
    );
  }
  
  if (!db_num_rows($result)) {
    $output = t('No comments available.');
  }
  
  $output .= theme('table', array(), $rows);
  $output .= theme('pager', NULL, 50);
  return $output;
}

/**
 * Switch moderation flag
 *
 * @param string $obj_type one of 'node', 'comment'
 * @param integer $obj_id
 */
function moderation_switch_moderation($obj_id, $obj_type) {
  global $user;
    
  $status = db_result(db_query("SELECT status FROM {moderation_moderation} WHERE obj_id=%d AND obj_type='%s'", $obj_id, $obj_type));
  db_query("INSERT INTO {moderation} SET obj_id=%d, obj_type='%s', uid=%d, attribute='%s', status=%d, created=%d", $obj_id, $obj_type, $user->uid, 'moderate', !$status, time());
  db_query("DELETE FROM {moderation_moderation} WHERE obj_id=%d AND obj_type='%s'", $obj_id, $obj_type);
  print drupal_to_js(array(db_query("INSERT INTO {moderation_moderation} SET obj_id=%d, obj_type='%s', status=%d", $obj_id, $obj_type, !$status), !$status, 'moderate'));
  exit();
}

/**
 * Switch an attribute
 *
 * @param integer $obj_id
 * @param string $obj_type one of 'node', 'comment'
 * @param string $attribute one of 'status', 'promote', 'sticky'
 */
function moderation_switch_attribute($obj_id, $obj_type, $attribute) {
  global $user;
  
  if ($obj_type == 'node') {
    $status_new = !db_result(db_query("SELECT %s FROM {node} WHERE nid=%d", $attribute, $obj_id));
    $success = db_query("UPDATE {node} SET %s=%d WHERE nid=%d", $attribute, $status_new, $obj_id);
  }
  else if ($obj_type == 'comment') {
    $status_new = !db_result(db_query("SELECT %s FROM {comments} WHERE cid=%d", $attribute, $obj_id));
    $success = db_query("UPDATE {comments} SET %s=%d WHERE cid=%d", $attribute, $status_new, $obj_id);
  }

  db_query("INSERT INTO {moderation} SET obj_id=%d, obj_type='%s', uid=%d, attribute='%s', status=%d, created=%d", $obj_id, $obj_type, $user->uid, $attribute, $status_new, time());  
  print drupal_to_js(array($success, $status_new, $attribute));
  exit();
}

/**
 * Get the preview markup for a node or a comment
 * 
 * @param integer $obj_id
 * @param string $obj_type
 */
function moderation_get_preview($obj_id, $obj_type) {
  if ($obj_type == 'node') { 
    if ($node = node_load($obj_id)) {
      $data = theme('moderation_node_preview', $node);
    }
  }
  else if ($obj_type == 'comment') {
    if ($comment = _comment_load($obj_id)) {
      $_GET['q'] = 'node/'. $comment->nid;
      $data = theme('comment_preview', $comment);
    }
  }
  print drupal_to_js($data);
  exit();
}

/**
 * Get an objects attribute
 *
 * @param integer $obj_id
 * @param string $obj_type
 * @param string $attribute one of 'status', 'promote', 'sticky', 'moderate'
 */
function moderation_get_attribute($obj_id, $obj_type, $attribute) {
  $table = ($obj_type == 'comment') ? 'comments' : 'node';
  $id    = ($obj_type == 'comment') ? 'cid'      : 'nid';
  
  if ($attribute == 'moderate') {
    print drupal_to_js(array(db_result(db_query("SELECT status FROM {moderation_moderation} WHERE obj_id=%d AND obj_type='%s'", $obj_id, $obj_type))));
  }
  else {
    print drupal_to_js(array(db_result(db_query("SELECT %s FROM {%s} WHERE %s=%d", $attribute , $table, $id, $obj_id))));
  }
  
  exit();
}

/**
 * Display a node preview for display during node creation and editing.
 *
 * @param $node
 *   The node object which is being previewed.
 */
function theme_moderation_node_preview($node) {
  $output = '<div class="preview">';
  if ($node->teaser && $node->teaser != $node->body) {
    $output .= '<h3>'. t('Preview trimmed version') .'</h3>';
    $output .= node_view(drupal_clone($node), 1, FALSE, 0);
    $output .= '<h3>'. t('Preview full version') .'</h3>';
    $output .= node_view($node, 0, FALSE, 0);
  }
  else {
    $output .= node_view($node, 0, FALSE, 0);
  }
  $output .= "</div>\n";

  return $output;
}