<?php
/**
 * @file
 * Contains functions only needed for drush integration.
 */

/**
 * Implementation of hook_drush_command().
 */
function zen_drush_command() {
  $items = array();

  $items['zen'] = array(
    'description' => 'Set up a Zen starter kit.',
    'arguments' => array(
      'name' => 'A name for your theme.',
    ),
    'options' => array(
      'machine-name' => '[a-z, 0-9] A machine-readable name for your theme.',
    ),
    'examples' => array(
      'drush zen "My theme name" --machine-name=my_theme',
    ),
  );

  return $items;
}

/**
 * Set up a Zen sub-theme with the starter kit.
 */
function drush_zen($name = 'My theme') {

  $machine_name = drush_get_option('machine-name');
  if (!$machine_name) {
    $machine_name = str_replace(' ', '_', strtolower($name));
    $search = array(
      '/[^a-z0-9_]/', // Remove characters not valid in function names.
      '/^[^a-z]+/',   // Functions must begin with an alpha character.
    );
    $machine_name = preg_replace($search, '', $machine_name);
  }

  $zen_path = drush_locate_root() . '/' . drupal_get_path('theme', 'zen');

  // From Zen's location, we move up one directory and construct the path where
  // our sub theme will be created.
  $subtheme_path = explode('/', $zen_path);
  array_pop($subtheme_path);
  $subtheme_path = implode('/', $subtheme_path) . '/' . str_replace('_', '-', $machine_name);

  // Make a fresh copy of the original starter kit.
  drush_op('zen_copy', $zen_path . '/STARTERKIT', $subtheme_path);

  // Rename the info file and fill in the theme name.
  drush_op('zen_file_str_replace', $subtheme_path . '/STARTERKIT.info.txt', '= Zen Sub-theme Starter Kit', '= ' . $name);
  drush_op('rename', $subtheme_path . '/STARTERKIT.info.txt', $subtheme_path . '/' . $machine_name . '.info');

  // Replace all occurences of 'STARTERKIT' with the machine name of our sub theme.
  drush_op('zen_file_str_replace', $subtheme_path . '/theme-settings.php', 'STARTERKIT', $machine_name);
  drush_op('zen_file_str_replace', $subtheme_path . '/template.php', 'STARTERKIT', $machine_name);

  // Notify user of the newly created theme.
  drush_print(dt('Starter kit for "!name" created in: !path', array(
    '!name' => $name,
    '!path' => $subtheme_path,
  )));
}

/**
 * Copy a directory recursively.
 */
function zen_copy($source_dir, $target_dir, $ignore = '/^(\.(\.)?|CVS|\.svn|\.git|\.DS_Store)$/') {
  if (!is_dir($source_dir)) {
    drush_die(dt('The directory "!directory" was not found.', array('!directory' => $source_dir)));
  }
  $dir = opendir($source_dir);
  @mkdir($target_dir);
  while($file = readdir($dir)) {
    if (!preg_match($ignore, $file)) {
      if (is_dir($source_dir . '/' . $file)) {
        zen_copy($source_dir . '/' . $file, $target_dir . '/' . $file, $ignore);
      }
      else {
        copy($source_dir . '/' . $file, $target_dir . '/' . $file);
      }
    }
  }
  closedir($dir);
}

/**
 * Replace strings in a file.
 */
function zen_file_str_replace($file_path, $find, $replace) {
  $file_contents = file_get_contents($file_path);
  $file_contents = str_replace($find, $replace, $file_contents);
  file_put_contents($file_path, $file_contents);
}