<?php
// $Id: translation_overview.module,v 1.18 2010-04-20 22:22:56 drewish Exp $

define('TRANSLATION_OVERVIEW_HIGH', 2);
define('TRANSLATION_OVERVIEW_NORMAL', 1);
define('TRANSLATION_OVERVIEW_IGNORE', 0);

/**
 * Implements hook_help().
 */
function translation_overview_help($path, $arg) {
  switch ($path) {
    case 'admin/content/translation_overview_manage':
      $args = array();
      $states = array('original', 'current', 'outofdate', 'missing');
      foreach ($states as $state) {
        $args['!' . $state] = theme('translation_overview_translation_link', array('state' => $state));
      }
      return '<p>' . t('The table uses the following symbols to indicate the translation status: !original, !current, !outofdate, !missing.', $args) . '</p>';
  }
}

/**
 * Implements hook_theme().
 */
function translation_overview_theme() {
  return array(
    'translation_overview_translation_link' => array(
      'variables' => array('state' => NULL, 'link' => array(), 'properties' => array()),
    ),
    'translation_overview_node_form' => array(
      'render element' => array('form' => array()),
      'file' => 'translation_overview.pages.inc',
    ),
  );
}


/**
 * Implements hook_permission().
 */
function translation_overview_permission() {
  $perms = array(
    'view translation overview assigments' => array(
      'title' => t('View translation overview assigments'),
      'description' => t('Allow users to view the translations assignments.'),
    )
  );
  foreach (locale_language_list() as $lang_code => $language) {
    $perms['manage ' . check_plain($lang_code) . ' translation overview priorities'] = array(
      'title' => t('Manage %language translation overview priorities', array('%language' => $language)),
    );
  }

  return $perms;
}


/**
 * Implements hook_menu().
 */
function translation_overview_menu() {
  $default_language = language_default('language');

  $items = array();

  $items['admin/content/translation_overview_manage'] = array(
    'title' => 'Translation overview',
    'type' => MENU_NORMAL_ITEM,
    'description' => "View the translation status of the site's content.",
    'page callback' => 'translation_overview_manager_page',
    'file' => 'translation_overview.pages.inc',
    'access callback' => 'translation_overview_is_manager',
  );
  $items['admin/content/translation_overview_assignments'] = array(
    'title' => 'Translator assigments',
    'description' => "View the translations assignments.",
    'type' => MENU_NORMAL_ITEM,
    'page callback' => 'translation_overview_assignment_lang_page',
    'file' => 'translation_overview.pages.inc',
    'access arguments' => array('view translation overview assigments'),
  );
  $i = 0;
  foreach (language_list() as $language) {
    if ($language->enabled) {
      $items['admin/content/translation_overview_assignments/' . $language->language] = array(
        'title' => $language->name,
        'description' => $language->name,
        'type' => MENU_NORMAL_ITEM,
        'weight' => $i++,
        'page callback' => 'translation_overview_assignment_page',
        'page arguments' => array($language->language),
        'file' => 'translation_overview.pages.inc',
        'access arguments' => array('view translation overview assigments'),
      );
    }
  }
  return $items;
}

/**
 * Implements hook_menu_alter().
 */
function translation_overview_menu_alter(&$callbacks) {
  // Replace the translation module's node tab with our own.
  $callbacks['node/%node/translate']['module'] = 'translation_overview';
  $callbacks['node/%node/translate']['page callback'] = 'translation_overview_node_page';
  $callbacks['node/%node/translate']['file'] = 'translation_overview.pages.inc';
}


/**
 * Implements hook_form_alter().
 *
 * We inject our own submit handler into the locale module's forms that add
 * or remove languages so that when they're submitted we rebuild the active
 * translation table.
 */
function translation_overview_form_alter(&$form, $form_state, $form_id) {
  switch ($form_id) {
    case 'locale_languages_delete_form':
      $form['#submit'][] = 'translation_overview_schema_remove_submit';
      break;

    case 'locale_languages_predefined_form':
    case 'locale_languages_custom_form':
      $form['#submit'][] = 'translation_overview_schema_add_submit';
      break;
  }
}

/**
 * Implements hook_node_delete.
 */
function translation_overview_node_delete($node) {
  db_query("DELETE FROM {translation_overview_priority} WHERE tnid = %d", $node->nid);
}

/**
 * Implements hook_node_insert.
 */
function translation_overview_node_insert($node) {
  // Only want to create a priority for translatable nodes that are untranslated.
  $types = translation_overview_node_types();
  if (empty($node->tnid) && !empty($types[$node->type])) {
    translation_overview_get_node_priority($node);
  }
}

/**
 * Implements hook_nodeapi().
 *
 * Track nodes to monitor their translation priority.
 */
function translation_overview_nodeapi_OLD(&$node, $op) { }

/**
 * Determine the name of the field in the {translation_overview_priority} table
 * for a language.
 *
 * @param $lang_code
 *   String with a language code.
 * @return
 *   String with a properly escaped field name.
 */
function translation_overview_field_name($lang_code) {
  return 'lang_' . db_escape_table($lang_code);
}

/**
 * Determine the priority of a node.
 *
 * If no priority has been set this module will create a record in the
 * {translation_overview_priority} table for it.
 *
 * @param $node
 * @param $reset
 *   Boolean indcating that the function's cache should be reset.
 * @return The priority:
 *   - TRANSLATION_OVERVIEW_HIGH
 *   - TRANSLATION_OVERVIEW_NORMAL
 *   - TRANSLATION_OVERVIEW_IGNORE
 */
function translation_overview_get_node_priority($node, $reset = FALSE) {
  static $cache;

  if (!isset($cache) || $reset) {
    $cache = array();
  }

  $tnid = empty($node->tnid) ? $node->nid : $node->tnid;
  if (isset($cache[$tnid])) {
    return $cache[$tnid];
  }

  $languages = array_keys(language_list('language'));
  $pri = array();
  $result = db_query('SELECT * FROM {translation_overview_priority} WHERE tnid = %d', $tnid);
  $row = db_fetch_array($result);

  // Insert a record if one isn't found.
  if (empty($row)) {
    $row = array('tnid' => empty($node->tnid) ? $node->nid : $node->tnid);
    foreach ($languages as $lang_code) {
      $row[translation_overview_field_name($lang_code)] = TRANSLATION_OVERVIEW_NORMAL;
    }
    drupal_write_record('translation_overview_priority', $row);
  }

  // We need to adjust the array's keys. The fieldnames are encoded language codes.
  foreach (array_keys(language_list('language')) as $language) {
    $pri[$language] = isset($row[translation_overview_field_name($language)]) ? $row[translation_overview_field_name($language)] : TRANSLATION_OVERVIEW_NORMAL;
  }
  return $cache[$tnid] = $pri;
}

/**
 * Determine if a user is a manager for a language (or any langauge if none is
 * specified).
 *
 * @param $language String with the language code. If no value is provided the
 *   a check will be made to see if they manage any language.
 * @param $account Drupal user object.
 * @return Boolean
 */
function translation_overview_is_manager($lang_code = NULL, $account = NULL) {
  if (empty($lang_code)) {
    foreach (locale_language_list() as $lang_code => $language) {
      if (user_access('manage ' . check_plain($lang_code) . ' translation overview priorities', $account)) {
        return TRUE;
      }
    }
    return FALSE;
  }

  return user_access('manage ' . check_plain($lang_code) . ' translation overview priorities', $account);
}

/**
 * Get a list of the node types that have translation support enabled.
 *
 * @return array of with node types as keys and their names as values.
 */
function translation_overview_node_types() {
  $types = array();
  foreach (node_type_get_names() as $type => $name) {
    if (translation_supported_type($type)) {
      $types[$type] = $name;
    }
  }
  return $types;
}

function translation_overview_trimmed_title($node, $len = 25) {
  // Shorten down the title
  $title = $node->title;
  if (drupal_strlen($title) > $len) {
    $title = drupal_substr($title, 0, $len) . '...';
  }
  return $title;
}

/**
 * Build a link to the translated node.
 *
 * @param $node Source node object
 * @param $translation_node Optional, translated node.
 * @param $language Language code.
 * @param $show_long Boolean, indicating if a longer version of the text should
 *   be displayed.
 * @return Link to the node if the user has permission or else just text.
 */
function translation_overview_translation_link($node, $translation_node = NULL, $language, $show_long = FALSE) {
  $link = array(
    'path' => 'node/' . $node->nid,
    'options' => array(),
  );
  $priorities = translation_overview_get_node_priority($node);
  $properties = array(
    'priority' => isset($priorities[$language]) ? $priorities[$language] : TRANSLATION_OVERVIEW_NORMAL,
    'published' => $node->status,
    'show_long' => $show_long,
    'has_note' => FALSE,
  );

  if ($language == $node->language) {
    $properties['has_note'] = !empty($node->field_translator_note[0]['value']);
    return theme('translation_overview_translation_link', array('state' => 'original', 'link' => $link, 'properties' => $properties));
  }
  // Determine the status of the translation.
  if (!empty($translation_node->nid)) {
    $properties['has_note'] = !empty($translation_node->field_translator_note[0]['value']);
    if (node_access('update', $translation_node)) {
      $link['path'] = "node/$translation_node->nid/edit";
      $link['options']['query'] = drupal_get_destination();
    }
    else {
      $link['path'] = 'node/' . $translation_node->nid;
    }

    if ($translation_node->translate) {
      return theme('translation_overview_translation_link', array('state' => 'outofdate', 'link' => $link, 'properties' => $properties));
    }
    return theme('translation_overview_translation_link', array('state' => 'current', 'link' => $link, 'properties' => $properties));
  }

  // Assume it's missing, see if we can create a translation.
  if (node_access('create', $node)) {
    $link['path'] = 'node/add/' . str_replace('_', '-', $node->type);
    $link['options']['query'] = array('destination' => $_GET['q'], 'translation' => $node->nid, 'language' => $language);
  }
  else {
    $link = array();
  }
  return theme('translation_overview_translation_link', array('state' => 'missing', 'link' => $link, 'properties' => $properties));
}

function theme_translation_overview_translation_link($state, $link = array(), $properties = array()) {
  // Merge in defaults.
  $properties += array(
    'priority' => TRANSLATION_OVERVIEW_NORMAL,
    'has_note' => FALSE,
    'published' => TRUE,
    'show_long' => TRUE,
  );

  $long = '&nbsp;';
  $link['options']['html'] = TRUE;

  $priorities = array(
    TRANSLATION_OVERVIEW_HIGH => array('display' => t('High priority'), 'css' => 'trov-priority-high'),
    TRANSLATION_OVERVIEW_NORMAL => array('display' => t('Normal'), 'css' => 'trov-priority-normal'),
    TRANSLATION_OVERVIEW_IGNORE => array('display' => t('Ignored'), 'css' => 'trov-priority-ignore'),
  );

  $link_title = array();
  if (!empty($priorities[$properties['priority']]['display'])) {
    $link_title[] = $priorities[$properties['priority']]['display'];
  }
  if (empty($properties['published'])) {
    $link_title[] = t('unpublished');
  }
  switch ($state) {
    case 'original':
      $long = t('Original');
      $link_title[] = t('original');
      break;
    case 'current':
      $long = t('Complete');
      $link_title[] = t('completed translation');
      break;
    case 'outofdate':
      $long = t('Out-of-date');
      $link_title[] = t('out-of-date translation');
      break;
    case 'missing':
      $long = t('Untranslated');
      $link_title[] = t('untranslated content');
      break;
  }
  if (!empty($properties['has_note'])) {
    $link_title[] = t('with a note');
  }

  if (isset($link['path'])) {
    if (preg_match('/node\/\d*\/edit/', $link['path'])) {
      $action = t('Click to edit it.');
    }
    else if (preg_match('/node\/add/', $link['path'])) {
      $action = t('Click to add it.');
    }
    else if (preg_match('/node\/\d*/', $link['path'])) {
      $action = t('Click to view it.');
    }
    $link['options']['attributes'] = array('title' => drupal_ucfirst(trim(implode(', ', $link_title))) . '. ' . $action);
  }

  $class_note = $properties['has_note'] ? 'trov-has-note' : '';
  $class_state = $properties['published'] ? "trov-$state" : "trov-$state-unpublished";
  $class_priority = $priorities[$properties['priority']]['css'];

  $output = "<span class='trov-node $class_note'><span class='$class_state $class_priority'></span>";
  $output .= "</span>";
  if ($properties['show_long']) {
    $output .= "<span class='trov-description'>$long</span>";
  }
  if (!empty($link['path'])) {
    $output = l($output, $link['path'], $link['options']);
  }
  return $output;
}

/**
 * Alter the schema when new languages are added.
 */
function translation_overview_schema_add_submit($form, &$form_state) {
  $fieldname = translation_overview_field_name($form_state['values']['langcode']);
  if (!db_field_exists('translation_overview_priority', $fieldname)) {
    $ret = array();
    $field = array(
      'type' => 'int',
      'size' => 'tiny',
      'unsigned' => TRUE,
      'not null' => TRUE,
      'default' => TRANSLATION_OVERVIEW_NORMAL,
    );
    $keys = array(
      'indexes' => array($fieldname => array($fieldname))
    );
    db_add_field('translation_overview_priority', $fieldname, $field, $keys);
    watchdog('translation_overview', 'Added a column for %langcode to the translation_overview_priority table.', array('%langcode' => $form_state['values']['langcode']));
  }
}

/**
 * Alter the schema when languages are removed.
 */
function translation_overview_schema_remove_submit($form, &$form_state) {
  $fieldname = db_escape_table($form_state['values']['langcode']);
  if (db_field_exists('translation_overview_priority', $fieldname)) {
    db_drop_index('translation_overview_priority', $fieldname);
    db_drop_field('translation_overview_priority', $fieldname);
    watchdog('translation_overview', 'Dropped the %langcode column from the translation_overview_priority table.', array('%langcode' => $form_state['values']['langcode']));
  }
}