<?php
// $Id: cmis.module,v 1.2 2009-02-27 13:36:55 cbalan Exp $

/**
 * Utility function that returns all known vendors
 * 
 * @return array
 */
function cmis_get_vendors() {
  $vendors = array();
  $info_array = module_invoke_all('cmis_info');
  foreach ($info_array as $type => $info) {
    $info['type'] = $type;
    $vendors[$type] = $info;
  }
  return $vendors;
}

/**
 * Utility function used to call a CMIS method, 
 * using the CMIS vendor selected in config.  
 *
 * @return mixed
 */
function cmis_vendor_invoke() {
  $vendor = variable_get('cmis_vendor', null);
  if (is_null($vendor)) {
    watchdog('cmis_vendor_invoke', "cmis module not configured", null, WATCHDOG_ERROR);
    return;
  }

  $args = func_get_args();
  $cmis_method = $args[0];

  $vendors = cmis_get_vendors();
  if (array_key_exists($vendor, $vendors)) {
    unset($args[0]);
    $function = $vendor . '_cmisapi_' . $cmis_method;
    if (function_exists($function)) {
      return call_user_func_array($function, $args);
    }
    watchdog('cmis_vendor_invoke', "$function not implemented", null, WATCHDOG_ERROR);
    return;
  }
  watchdog('cmis_vendor_invoke', "Unknown vendor: $vendor", null, WATCHDOG_ERROR);
  return;
}

/**
 * Implementation of hook_menu() for CMIS module.
 */
function cmis_menu() {
  $items = array();
  $items['admin/settings/cmis'] = array(
    'title' => 'CMIS Settings',
    'description' => 'Connection settings to CMIS repositories',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('cmis_admin_settings'),
    'access callback' => 'user_access',
    'access arguments' => array('administer cmis'),
    
  );

  $items['cmis/autocomplete'] = array(
    'title' => t('cmis path autocomplete'), 
    'page callback' => 'cmis_path_autocomplete', 
    'access callback' => 'user_access', 
    'access arguments' => array('access cmis'), 
    'type' => MENU_CALLBACK,
  );

  return $items;
}

/**
 * Prepare and generate entry form for CMIS settings.
 */
function cmis_admin_settings() {
  $vendors = array('None');
  foreach (cmis_get_vendors() as $key => $vendor) {
    $vendors[$key] = $vendor['name'];
  }

  $form['cmis_settings'] = array(
    '#type' => 'fieldset',
    '#title' => t('CMIS Settings'), 
    '#description' => t('Settings for cmis repositories'), 
    '#collapsible' => FALSE, 
    '#collapsed' => FALSE,
  );

  $form['cmis_settings']['cmis_vendor'] = array(
    '#type' => 'select',
    '#title' => t('Vendors'), 
    '#default_value' => variable_get('cmis_vendor', null), 
    '#options' => $vendors, '#description' => t('Select the CMIS vendor'),
  );

  return system_settings_form($form);
}

/**
 * Validate Setting inputs for CMIS
 */
function cmis_admin_settings_validate($form, & $form_state) {
  // vendor is required
  $endpoint = $form_state['values']['cmis_vendor'];
  if ($endpoint == '') {
    form_set_error('cmis_vendor', t('You must specify the CMIS vendor.'));
  }
}

/**
 * Return permissions for the CMIS module.
 */
function cmis_perm() {
  $perms = array(
    'administer cmis',
    'access cmis',
  );
  return $perms;
}

/**
 * Utitily function for supporting CMIS repository path auto-complete.
 */
function cmis_path_autocomplete() {
  module_load_include('api.inc', 'cmis');

  $args = func_get_args();
  $path = '/' . implode('/', array_slice($args, 0, sizeof($args) - 1));
  $key = end($args);

  $matches = array();
  $repository = cmisapi_getRepositoryInfo();

  if ($path == '/') {
    $folderId_parts = explode('/', $repository->rootFolderId);
    $path = '/' . end($folderId_parts);

    $matches[$path] = $path;
    print drupal_to_js($matches);
    return;
  }

  $folderObject = cmisapi_getProperties($repository->repositoryId, drupal_urlencode($path));

  foreach (array('folder', 'document') as $cmis_base_type) {
    $cmis_objects = cmisapi_query($repository->repositoryId, "SELECT * FROM $cmis_base_type WHERE ".($key!='*'?"Name like '%$key%' AND":"")." IN_FOLDER('$folderObject->id')");
    foreach ($cmis_objects as $cmis_object) {
      $matches[$path . '/' . $cmis_object->title . ($cmis_base_type == 'folder' ? '/' : '')] = $cmis_object->title;
    }
  }

  print drupal_to_js($matches);
}