<?php

/**
 * Implements hook_menu().
 */
function live_css_menu() {
  $items = array();

  $items['css/save'] = array(
    'page callback' => 'live_css_save', 
    'access arguments' => array('edit css'), 
    'type' => MENU_CALLBACK,
  );
  $items['admin/settings/live_css'] = array(
    'title' => t('Live CSS'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('live_css_admin'),
    'access arguments' => array('access administration pages'),
    'type' => MENU_NORMAL_ITEM
  );
  
  return $items;
}

/**
 * Implements hook_perm().
 */
function live_css_perm(){
  return array('edit css');
}

/**
 * Implements hook_settings()
 */
function live_css_admin(){
  $form = array();
  
  $form['live_css_less'] = array(
    '#type' => 'checkbox',
    '#title' => t('Enable LESS Support'),
    '#default_value' => variable_get('live_css_less', 1),
    '#description' => t('Allows the live editing and display of LESS files on the site, by simply embedding stylesheets with a "less" extension instead of "css". The Less is parsed on each page load, even for anonymous users. In production you may wish to disable this feature and use the LESS module instead.')
  );
  $form['live_css_hideadmin'] = array(
    '#type' => 'checkbox',
    '#title' => t('Hide Admin Menu'),
    '#default_value' => variable_get('live_css_hideadmin', 1),
    '#description' => t('Automatically hides the administration menu when editing CSS.')
  );
  $form['live_css_hidemodules'] = array(
    '#type' => 'checkbox',
    '#title' => t('Only show theme CSS'),
    '#default_value' => variable_get('live_css_hidemodules', 0),
    '#description' => t('Removes module and other styles from the CSS list.')
  );
  $form['live_css_theme'] = array(
    '#type' => 'select',
    '#title' => t('Editor Theme'),
    '#default_value' => variable_get('live_css_theme', 'twilight'),
    '#options' => live_css_list_themes()
  );
  $form['live_css_fontsize'] = array(
    '#type' => 'select',
    '#title' => t('Font Size'),
    '#default_value' => variable_get('live_css_fontsize', '12px'),
    '#options' => array(
      '8px' => '8px',
      '10px' => '10px',
      '11px' => '11px',
      '12px' => '12px',
      '14px' => '14px',
      '16px' => '16px',
      '18px' => '18px',
    )
  );
  $form['live_css_tabsize'] = array(
    '#type' => 'select',
    '#title' => t('Tab Size'),
    '#default_value' => variable_get('live_css_tabsize', 2),
    '#options' => array(
      1 => '1',
      2 => '2',
      3 => '3',
      4 => '4',
    )
  );
  $form['live_css_softtabs'] = array(
    '#type' => 'checkbox',
    '#title' => t('Soft Tabs'),
    '#default_value' => variable_get('live_css_softtabs', 1)
  );
  
  return system_settings_form($form);
}

function live_css_list_themes(){
  $result = array();
  $files = live_css_list_files(dirname(__FILE__) . '/ace/src');
  foreach($files as $file){
    if(substr($file, 0, 5) == 'theme'){
      $theme = substr($file, 6, strlen($file) - 9);
      $name = ucwords(str_replace('_', ' ', $theme));
      $result[$theme] = $name;
    }    
  }
  return $result;
}

/* get the directory listing for the theme files of ace */
function live_css_list_files($folder){
  $results = array();
  
  $handler = opendir($folder);
  while($file = readdir($handler)){
    if($file != '.' && $file != '..')
      $results[] = $file;
  }
  closedir($handler);
  return $results;
}


/**
 * Implements hook_init().
 */
function live_css_init() {
  
  $less = variable_get('live_css_less', 1);
  if ($less) {
    drupal_add_js(drupal_get_path('module', 'live_css') . '/less-display.js');
    drupal_add_js(drupal_get_path('module', 'live_css') . '/less-1.1.3.min.js');
  }
  
  //check permissions
  if (user_access('edit css')) {
    
    //set settings
    $theme = variable_get('live_css_theme', 'twilight');
    $settings = array();
    $settings['theme'] = $theme;
    $settings['autoload'] = false;
    $settings['hideadmin'] = variable_get('live_css_hideadmin', 1);
    $settings['hidemodules'] = variable_get('live_css_hidemodules', 0);
    $settings['fontsize'] = variable_get('live_css_fontsize', '12px');
    $settings['tabsize'] = (int)variable_get('live_css_tabsize', 2);
    $settings['softtabs'] = (boolean)variable_get('live_css_softtabs', 1);
    $settings['less'] = $less;
    $settings['savepath'] = url('css/save');
    drupal_add_js(array('live_css' => $settings), 'setting');
    
    drupal_add_js(drupal_get_path('module', 'live_css') . '/less-1.1.3.min.js');
    drupal_add_js(drupal_get_path('module', 'live_css') . '/ace/src/ace.js');
    drupal_add_js(drupal_get_path('module', 'live_css') . '/ace/src/mode-css.js');
    drupal_add_js(drupal_get_path('module', 'live_css') . '/ace/src/theme-' . $theme . '.js');
    
    drupal_add_js(drupal_get_path('module', 'live_css') . '/plugins.js');
    
    drupal_add_css(drupal_get_path('module', 'live_css') . '/css.css', 'module', 'all', FALSE);
    drupal_add_js(drupal_get_path('module', 'live_css') . '/css.js');
  }
}

function live_css_save(){
  if (!user_access('edit css')) return;
  $css = $_POST['css'];
  $href = $_POST['href'];
  
  //calculate the file path relative to the base drupal folder
  $parts = split('/', $href);
  $path = '';
  for($i = 3; $i < count($parts); $i++){
    $path .= $parts[$i] . '/';
  }
  if(strpos($path, '?') > 0)
    $path = substr($path, 0, strpos($path, '?'));
  else
    $path = substr($path, 0, -1);

  $path = $_SERVER['DOCUMENT_ROOT'] . '/' . $path;  

  //save file back
  $fh = fopen($path, 'w') or die("Can't open file " . $path . " at " . $href);
  fwrite($fh, $css);
  fclose($fh);
  
  echo json_encode(array(
    'result' => 'success',
    'filename' => $path
  ));
}