wp-custom-field-traits.php

<?php
/*
 * Plugin Name: WP Custom Field Traits
 * Description: A unique OO approach to custom WordPress fields
 * Author: Coby Tamayo
 * Author URI: http://tamayoweb.net
 */

define('CFT_PLUGIN_DIR', plugin_dir_path(__FILE__));

spl_autoload_register(function($className) {
  $path = preg_replace('~[\\\\_]~', '/', $className);

  $dir = CFT_PLUGIN_DIR . 'lib/';

  if( file_exists("{$dir}/{$path}.php") ) {
    require "{$dir}/{$path}.php";
  }
});



$_cft_plugin_init = function() {

  /*
   * Set up sane, overrideable defaults for dependency injection
   */
  $plugin = Cft\Plugin::getInstance();

  // encapsulate the HTTP request so that we can populate it explicitly,
  // with data from anywhere
  if( $_POST ) {
    $plugin->set('request', $_POST);
  }

  $plugin->set('validatorBuilder', new Cft\ValidatorBuilder($plugin));
  $plugin->set('fieldBuilder', new Cft\FieldBuilder($plugin));

  // where to look for view files
  $plugin->set('viewDirs', [CFT_PLUGIN_DIR . 'views/']);

  // where to cache rendered views
  $plugin->set('viewCache', CFT_PLUGIN_DIR . 'view-cache/');

  // Twig options
  $plugin->set('viewOptions', [
    'cache' => $plugin->get('viewCache'),
    'debug' => WP_DEBUG,
  ]);

  // how to render views
  $plugin->set('view', function() use($plugin) {
    $loader = new Twig_Loader_Filesystem($plugin->get('viewDirs'));

    $twig = new Twig_Environment($loader, $plugin->get('viewOptions'));

    // Twig filter for rendering assoc arrays as HTML attributes
    $twig->addFilter( new Twig_SimpleFilter('atts', function(array $atts) {
      $htmlAtts = [];
      foreach( $atts as $key => $value ) {
        // allow for specifying value-less attributes such as "disabled"
        // by passing literal true
        $htmlAtts[] = $value === true
          ? $key
          : "{$key}=\"{$value}\"";
      }

      return implode( ' ', $htmlAtts );
    }));

    return new Cft\View\TwigView( $twig );
  });

};

$_cft_plugin_init();


// Clear up the global namespace
unset($_cft_plugin_init);