<?php

/**
 * @file
 * Enables Drupal to add scripts and styles from frontend on all over the site.
 */

/**
 * Implements hook_menu().
 */
function hfs_menu() {

  $items['admin/config/development/hfs'] = array(
    'title'            => 'HFS (Header Footer Scripts)',
    'page callback'    => 'drupal_get_form',
    'page arguments'   => array('hfs_header_settings_form'),
    'access arguments' => array('administer hfs module'),
    'description'      => 'Allow to add scripts and styles from the frontend under Head section.',
    'file'             => 'hfs.admin.inc',
    'weight'           => 10,
  );

  $items['admin/config/development/hfs/header'] = array(
    'title'            => 'Header Scripts',
    'page callback'    => 'drupal_get_form',
    'page arguments'   => array('hfs_header_settings_form'),
    'access arguments' => array('administer hfs module'),
    'description'      => 'Allow to add scripts and styles from the frontend under Head section.',
    'file'             => 'hfs.admin.inc',
    'type'             => MENU_LOCAL_TASK,
    'weight'           => 20,
  );

  $items['admin/config/development/hfs/body'] = array(
    'title'            => 'Body Scripts',
    'page callback'    => 'drupal_get_form',
    'page arguments'   => array('hfs_body_settings_form'),
    'access arguments' => array('administer hfs module'),
    'description'      => 'Allow to add scripts and styles from the frontend at the start of BODY Tag.',
    'file'             => 'hfs.admin.inc',
    'type'             => MENU_LOCAL_TASK,
    'weight'           => 30,
  );

  $items['admin/config/development/hfs/footer'] = array(
    'title'            => 'Footer Scripts',
    'page callback'    => 'drupal_get_form',
    'page arguments'   => array('hfs_footer_settings_form'),
    'access arguments' => array('administer hfs module'),
    'description'      => 'Allow to add scripts and styles from the frontend just before the end of BODY Tag.',
    'file'             => 'hfs.admin.inc',
    'type'             => MENU_LOCAL_TASK,
    'weight'           => 40,
  );

  return $items;
}

/**
 * Implements hook_permission().
 */
function hfs_permission() {

  $permissions['administer hfs module'] = array(
    'title'           => t('Add Scripts all over the site'),
    'restrict access' => TRUE,
    'description'     => t('Users who have this permission can add and remove the scripts from the site.'),
  );

  return $permissions;
}

/**
 * Implements hook_process_html().
 *
 * Add scripts on overall the site which are defined on the settings page.
 */
function hfs_process_html(&$variables) {

  $header_scripts = variable_get('hfs_header_scripts');
  $body_scripts   = variable_get('hfs_body_scripts');
  $footer_scripts = variable_get('hfs_footer_scripts');

  if (isset($body_scripts) && !empty($body_scripts)) {
    if (!empty($body_scripts['styles'])) {
      $variables['page_top'] .= $body_scripts['styles'] . PHP_EOL;
    }
    if (!empty($body_scripts['scripts'])) {
      $variables['page_top'] .= $body_scripts['scripts'] . PHP_EOL;
    }
  }
  if (isset($header_scripts) && !empty($header_scripts)) {
    if (!empty($header_scripts['styles'])) {
      $variables['styles'] .= $header_scripts['styles'] . PHP_EOL;
    }
    if (!empty($header_scripts['scripts'])) {
      $variables['scripts'] .= $header_scripts['scripts'] . PHP_EOL;
    }
  }
  if (isset($footer_scripts) && !empty($footer_scripts)) {
    if (!empty($footer_scripts['styles'])) {
      $variables['page_bottom'] .= $footer_scripts['styles'] . PHP_EOL;
    }
    if (!empty($footer_scripts['scripts'])) {
      $variables['page_bottom'] .= $footer_scripts['scripts'] . PHP_EOL;
    }
  }

}