<?php

/**
 * @file
 * Install, update and uninstall functions for the css_injector module.
 *
 */

/**
 * Implements hook_install().
 */
function css_injector_install() {
}

/**
 * Implements hook_schema().
 */
function css_injector_schema() {
  $schema['css_injector_rule'] = array(
    'fields' => array(
      'crid' => array(
        'description' => 'The primary identifier for the CSS injection rule',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE),
      'title' => array(
        'description' => 'The descriptive title of the CSS injection rule',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE),
      'rule_type' => array(
        'description' => 'The type of rule to use when determining if the CSS should be injected',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0),
      'rule_conditions' => array(
        'description' => 'The data to evaluate when determining if the CSS should be injected',
        'type' => 'text',
        'not null' => TRUE),
      'rule_themes' => array(
        'description' => 'Themes that CSS rule will be applied to',
        'type' => 'text',
        'not null' => TRUE),
      'media' => array(
        'description' => 'The media type of the CSS file (screen, print, etc.)',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE),
      'preprocess' => array(
        'description' => 'Whether the CSS file should be included by the CSS preprocessor',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0),
      'enabled' => array(
        'description' => 'Whether the rules should be enabled',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 1),
    ),
    'primary key' => array('crid'),
  );
  return $schema;
}

/**
 * Adds enabled rule and themes list.
 */
function css_injector_update_7002() {
  $enabled = array(
    'description' => 'Whether the rules should be enabled',
    'type' => 'int',
    'unsigned' => TRUE,
    'not null' => TRUE,
    'default' => 1,
  );
  $themes = array(
    'description' => 'Themes that CSS rule will be applied to',
    'type' => 'text',
  );
  if (!db_field_exists('css_injector_rule', 'enabled')) {
    db_add_field( 'css_injector_rule', 'enabled', $enabled);
  }
  if (!db_field_exists('css_injector_rule', 'rule_themes')) {
    db_add_field( 'css_injector_rule', 'rule_themes', $themes);
  } else {
    db_change_field('css_injector_rule', 'rule_themes', 'rule_themes', array('type' => 'text', 'not null' => FALSE));
  }
}

/**
 * Implements hook_uninstall().
 */
function css_injector_uninstall() {
  cache_clear_all('css_injector:*', 'cache', TRUE);
  $rules = db_query("SELECT * FROM {css_injector_rule}", array(), array('fetch' => PDO::FETCH_ASSOC))->fetchAllAssoc('crid');
  module_load_include('module', 'css_injector');
  foreach($rules as $crid => $rule) {
    file_unmanaged_delete(_css_injector_rule_uri($crid));
  }
  db_drop_table('css_injector_rule');
}

/**
 * Implements hook_requirements().
 * We'll use this to prevent installation of the module if the file directory
 * is not available and writable.
 */
function css_injector_requirements($phase) {
  $status = REQUIREMENT_OK;
  $dir = 'public://css_injector';
  if (!file_prepare_directory($dir, FILE_MODIFY_PERMISSIONS)) {
    if (!file_prepare_directory($dir, FILE_CREATE_DIRECTORY)) {
      $status = REQUIREMENT_ERROR;
    }
  }
  $requirements = array(
    'css_injector' => array(
      'title' => t('CSS Injector directory writable'),
      'description' => $status == REQUIREMENT_OK ? t('CSS Injector Directory %dir is writable', array('%dir' => $dir)) : t('Directory %dir is not writable', array('%dir' => $dir)),
      'severity' => $status,
      'value' => $status == REQUIREMENT_OK ? t('Writable') : t('Not writable'),
    ),
  );
  return $requirements;
}