<?php
// $Id: stormknowledgebase.module,v 1.3.2.7 2008-08-03 17:51:08 robertogerola Exp $

/**
 * @file
 */

function stormknowledgebase_help($path) {
  $o = '';

  switch ($path) {
    case "admin/help#stormknowledgebase":
      $o = '<p>'. t("Provides knowledgebase support for Storm") .'</p>';
      break;
  }

  return $o;
}

function stormknowledgebase_perm() {
  return array(
                'Storm knowledgebase: access',
                'Storm knowledgebase: add',
                'Storm knowledgebase: delete all',
                'Storm knowledgebase: delete own',
                'Storm knowledgebase: edit all',
                'Storm knowledgebase: edit own',
                'Storm knowledgebase: view all',
                'Storm knowledgebase: view own',
  );
}

function stormknowledgebase_access($op, $node) {
  global $user; $account = $user;

  if ($op == 'create') {
    return user_access('Storm knowledgebase: add');
  }

  if (is_numeric($node)) $node = node_load($node);

  if ($op == 'delete') {
    if (user_access('Storm knowledgebase: delete all')) {
      return TRUE;
    }
    else if (user_access('Storm knowledgebase: delete own') && ($account->uid == $node->uid)) {
      return TRUE;
    }
  }

  if ($op == 'update') {
    if (user_access('Storm knowledgebase: edit all')) {
      return TRUE;
    }
    else if (user_access('Storm knowledgebase: edit own') && ($account->uid == $node->uid)) {
      return TRUE;
    }
  }

  if ($op == 'view') {
    if (user_access('Storm knowledgebase: view all')) {
      return TRUE;
    }
    else if (user_access('Storm knowledgebase: view own') && ($account->uid == $node->uid)) {
      return TRUE;
    }
  }
  return FALSE;
}

function stormknowledgebase_access_sql($sql, $where = array()) {
  if (user_access('Storm knowledgebase: view all')) {
    $where[] = "'storm_access'='storm_access'";
    return storm_rewrite_sql($sql, $where);
  }

  global $user;

  $cond = '';
  if (user_access('Storm knowledgebase: view own')) {
    $cond .= 'n.uid='. $user->uid;
  }
  if (empty($cond)) $cond = '0=1';
  $where[] = $cond;

  $where[] = "'storm_access'='storm_access'";
  return storm_rewrite_sql($sql, $where);
}

function stormknowledgebase_storm_rewrite_where_sql($query, $primary_table, $account) {
  static $conds = array();

  if ($conds[$account->uid]) {
    return $conds[$account->uid];
  }

  if (preg_match("/'storm_access'='storm_access'/", $query)) {
    $cond = '';
  }
  else {
    if (user_access('Storm knowledgebase: view all', $account)) {
      return '';
    }

    $cond = '';
    if (user_access('Storm knowledgebase: view own', $account)) {
      $cond .= " ${primary_table}.uid=". $account->uid;
    }
    if ($cond) {
      $cond = " WHEN 'stormknowledgebase' THEN IF($cond,1,0) ";
    }
    else {
      $cond = " WHEN 'stormknowledgebase' THEN 0 ";
    }
  }

  $conds[$account->uid] = $cond;
  return $cond;
}

function stormknowledgebase_menu($may_cache) {
  $items = array();

  if (!$may_cache) {
    if (arg(0)=='storm' && arg(1)=='knowledgebase') {
      require_once(drupal_get_path('module', 'stormknowledgebase') .'/stormknowledgebase.admin.inc');
      require_once(drupal_get_path('module', 'stormknowledgebase') .'/stormknowledgebase.theme.inc');
    }
    $items[] = array(
              'path' => 'storm/knowledgebase',
              'title' => t('Knowledge base'),
              'description' => t('Storm Knowledge base'),
              'callback' => 'stormknowledgebase_list',
              'access' => user_access('Storm knowledgebase: access'),
              'type' => MENU_NORMAL_ITEM
    );
  }

  return $items;
}

function stormknowledgebase_node_info() {
  return array(
    'stormknowledgebase' => array(
      'name' => t('Knowledge base'),
      'module' => 'stormknowledgebase',
      'description' => t("A knowledge base for Storm."),
      'has_body' => true,
    )
  );
}

function stormknowledgebase_form(&$node) {
  $type = node_get_types('type', $node);

  $form['title'] = array(
    '#type' => 'textfield',
    '#title' => check_plain($type->title_label),
    '#required' => TRUE,
    '#default_value' => $node->title,
    '#weight' => -49,
  );

  if ($type->has_body) {
    $form['body_filter']['#weight'] = -48;
    $form['body_filter']['body'] = array(
      '#type' => 'textarea',
      '#title' => check_plain($type->body_label),
      '#default_value' => $node->body,
      '#rows' => 20,
      '#required' => ($type->min_word_count > 0));
    $form['body_filter']['format'] = filter_form($node->format);
  }

  return $form;
}