<?php

/**
 * @file
 * This is the file description for Module Filter module.
 *
 * In this more verbose, multi-line description, you can specify what this
 * file does exactly. Make sure to wrap your documentation in column 78 so
 * that the file can be displayed nicely in default-sized consoles.
 *
 * @author greenSkin
 */

/**
 * Implementation of hook_perm().
 */
function module_filter_permission() {
  return array(
    'administer module filter' => array(
      'title' => t('Administer Module Filter'),
      'description' => t('Configure how Module Filter performs.')
    )
  );
}

/**
 * Implementation of hook_menu().
 */
function module_filter_menu() {
  $items['admin/config/user-interface/modulefilter'] = array(
    'title' => 'Module filter',
    'description' => 'Configure settings for Module Filter.',
    'access arguments' => array('administer module filter'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('module_filter_settings'),
    'file' => 'module_filter.admin.inc'
  );
  return $items;
}

/**
 * Implementation of hook_form_FORM_ID_alter().
 */
function module_filter_form_system_modules_alter(&$form, &$form_state, $form_id) {
  // Don't alter the form when confirming.
  if (isset($form['confirm'])) {
    return;
  }

  $form['module_filter'] = array(
    '#tree' => TRUE,
    '#weight' => -1
  );
  $form['module_filter']['name'] = array(
    '#type' => 'textfield',
    '#title' => t('Filter list')
  );

  $form['module_filter']['show'] = array(
    '#type' => 'checkboxes',
    '#default_value' => array('enabled', 'disabled', 'required', 'unavailable'),
    '#options' => array('enabled' => t('Enabled'), 'disabled' => t('Disabled'), 'required' => t('Required'), 'unavailable' => t('Unavailable')),
    '#prefix' => '<div id="module-filter-show-wrapper">',
    '#suffix' => '</div>'
  );

  if (variable_get('module_filter_tabs', 1)) {
    // Remove the fieldsets for each package since we will be using tabs
    // instead. Put all modules into one array.
    $modules = array(
      '#theme' => 'module_filter_modules_table',
      '#header' => array(
        array('data' => t('Enabled'), 'class' => 'checkbox'),
        t('Name'),
        t('Version'),
        t('Description'),
        array('data' => t('Operations'), 'colspan' => 3)
      )
    );

    $all = t('All');
    $tab_counts = array($all => array('id' => 'all', 'enabled' => 0, 'total' => 0));
    $form['#packages'] = array();
    foreach (element_children($form['modules']) as $package) {
      // Add the package to $form['#packages']. Tabs are built from this.
      $form['#packages'][$package] = $package;

      if (!isset($tab_counts[$package])) {
        $tab_counts[$package] = array('enabled' => 0, 'total' => 0);
      }

      foreach (element_children($form['modules'][$package]) as $module) {
        $tab_counts[$all]['total']++;
        $tab_counts[$package]['total']++;
        if (!empty($form['modules'][$package][$module]['enable']['#default_value'])) {
          $tab_counts[$all]['enabled']++;
          $tab_counts[$package]['enabled']++;
        }

        $modules[$module] = $form['modules'][$package][$module];
        $modules[$module]['#package'] = $package;
        $modules[$module]['#parents'] = array('modules', $package, $module);
      }
    }

    // Sort the array of modules alphabetically.
    uasort($modules, 'module_filter_sort_modules_by_display_name');

    // Replace the $form['modules'] with our $modules array.
    $form['modules'] = $modules;

    // Add our $tab_counts array to the form.
    $form['#tab_counts'] = $tab_counts;
  }

  $form['#theme'] = 'module_filter_system_modules';
}

/**
 * Implementation of hook_theme().
 */
function module_filter_theme() {
  return array(
    'module_filter_system_modules' => array(
      'render element' => 'form',
      'file' => 'module_filter.theme.inc'
    ),
    'module_filter_modules_table' => array(
      'render element' => 'form',
      'file' => 'module_filter.theme.inc',
    ),
    'module_filter_system_modules_tabs' => array(
      'render element' => 'form',
      'file' => 'module_filter.theme.inc'
    )
  );
}

function module_filter_sort_modules_by_display_name($a, $b) {
  if (is_array($a) && is_array($b) && isset($a['#package'], $b['#package'])) {
    return strcasecmp($a['name']['#markup'], $b['name']['#markup']);
  }
  return 0;
}

function module_filter_get_id($text) {
  $id = strtolower($text);
  return preg_replace('/([^a-z])([\/(  )])*/', '-', $id);
}
