e3_js.module

<?php
/**
 * @file e3_js.module
 * Creates e3_js config, loads correct version of js
 */


/**
 * Implements hook_init().
 */
function e3_js_init() {
  $env = variable_get('e3_js_prod', '0');

  // Decide whether to use the production version.
  if(!is_null($env)) {
    switch($env) {
      case 0:
        $script = 'e3_js.js';
        break;
      case 1:
        $script = 'e3_js.min.js';
        break;
    }
  } else {
    watchdog('e3_js has not been configured.', WATCHDOG_ERROR);
    // Assume we don't need debug mode
    $script = 'e3_js.min.js';
  }

  // If not configured otherwise, only load script on front-end pages
  if (variable_get('e3_js_admin') || arg(0) != 'admin') {

    $js_path = drupal_get_path('module', 'e3_js') . '/' . $script;

    drupal_add_js($js_path,
      array(
        'weight' => -50,
        'scope' => 'header',
        'preprocess' => true
      ), 'setting'
    );

    // Adds content of arg to e3 object.
    drupal_add_js(array('e3' => array('arg' => arg())),
      array('type' => 'setting'));

  }
}

/**
 *  Implements hook_menu().
 */
function e3_js_menu(){
  $items = array();

  $items['admin/config/development/e3js'] = array(
    'title' => 'e3_js',
    'description' => 'Configuration for the e3_js library.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('e3_js_admin_form'),
    'access arguments' => array('access devel information'),
  );

  return $items;
}

/**
 * Creates the admin settings form.
 * @return mixed
 */
function e3_js_admin_form() {
  $form['header'] = array(
    '#markup' => '<div style="padding:10px;border:1px solid #BEBFB9;margin-bottom:10px;"><p>This module loads the e3_js.js structure for modular javascript development into Drupal. For more information about implementation and usage, see the <a href="https://github.com/rgkimball/e3_js" target="_blank">e3_js GitHub repository</a>.</p></div>',
  );

  $form['e3_js_prod'] = array(
    '#type' => 'checkbox',
    '#title' => t('Use minified js'),
    '#description' => t('If unchecked, the unminified version will be loaded to allow debugging. It is recommended to define this in settings.php to automatically configure site environments appropriately.'),
    '#default_value' => variable_get('e3_js_prod', 0),
  );
  $form['e3_js_admin'] = array(
    '#type' => 'checkbox',
    '#title' => t('Load on admin pages.'),
    '#default_value' => variable_get('e3_js_admin', 0),
    '#description' => t('If checked, e3_js will be added to admin pages as well.')
  );

  return system_settings_form($form);
}

/**
 *  Implements hook_block_view_alter().
 *   Send block IDs to js for contextual operations.
 */
function e3_js_block_view_alter(&$data, $block) {

  drupal_add_js(array('e3' => array('blocks' => array("$block->bid"))),
    array('type' => 'setting'));

}