<?php
// $Id: asset_embed.module,v 1.1.2.1.2.1 2008-11-21 10:59:14 wmostrey Exp $

/**
 * @file
 * Asset Embed Module
 *
 * This module allows you to use embed code form various sites as assets. Each
 * provider is specified by an .inc file in the providers folder.
 */

/**
 * Implementation of hook_theme().
 */
function asset_embed_theme() {
	return array(
		'asset_embed_thumbnail' => array(
			'arguments' => array('asset' => NULL),
			'file' => 'inc/asset_embed.themes.inc',),
		'asset_embed_fullsize' => array(
			'arguments' => array('asset' => NULL, 'attr' => NULL),
			'file' => 'inc/asset_embed.themes.inc',),
	);
}

/**
 * Invoke a provider method.
 */
function asset_embed_invoke() {
	$args = func_get_args();
	$provider = array_shift($args);
	$hook = array_shift($args);

	$function ='asset_embed_'. $provider .'_'. $hook;
	if (function_exists($function)) {
		return call_user_func_array($function, $args);
	}

	return false;
}

/**
 * return a list of available providers
 *
 * @param $all
 *   Should all providers be returned or just the enabled ones.
 * @return
 * 	 The array of availabe providers
 */
function asset_embed_list_providers($all = FALSE) {
	static $providers = array();
	if (!count($providers)) {
		$path = drupal_get_path('module', 'asset_embed') . '/providers';
		$files = drupal_system_listing('.*\.inc$', $path, 'name', 0);
		foreach ($files as $file) {
			if ($all || variable_get('asset_embed_'. $file->name .'_enabled', 1)) {
				require_once("./$file->filename");
				$info = asset_embed_invoke($file->name, 'info');
				$providers[$file->name] = $info['name'] ? $info['name'] : $file->name;
			}
		}
	}
	return $providers;
}

function asset_embed_extract_id($provider, $text) {
	return asset_embed_invoke($provider, 'extract_id', $text);
}

function asset_embed_asset_settings() {
	$providers = asset_embed_list_providers(TRUE);
	if (is_array($providers)) {
		foreach ($providers as $provider => $name) {
			$form[$provider] = array(
				'#type' => 'fieldset',
				'#collapsible' => TRUE,
				'#collapsed' => !variable_get('asset_embed_'. $provider .'_enabled', 1),
				'#title' => $name,
				'#tree' => FALSE,
			);
			$form[$provider]['asset_embed_'. $provider .'_enabled'] = array(
				'#type' => 'checkbox',
				'#title' => t('Enabled'),
				'#default_value' => variable_get('asset_embed_'. $provider .'_enabled', 1),
				'#return_value' => 1,
			);
			$form[$provider] = array_merge($form[$provider], (array)asset_embed_invoke($provider, 'settings'));
		}
	} else{
		$form[] = array('#value' => t('No Providers Available'));
	}

	return system_settings_form($form);
}

function asset_embed_asset_type($op = 'info', $delta=0, $form_values=array()) {
	switch ($op) {
		case 'info':
			return array(
				'embed' => array(
					'value' => t('Embed'),
					'title' => t('Embed content from another site.'),
					'src' => drupal_get_path('module', 'asset') . '/misc/lullacons/movie-option-add.png',
			),
			);
		case 'form':
			switch ($delta) {
				case 'embed':
					$form['provider'] = array(
						'#type' => 'select',
						'#title' => t('Provider'),
						'#options' => asset_embed_list_providers(),
						'#weight' => -2,
					);
					$form['embed'] = array(
						'#type' => 'textarea',
						'#title' => t('Embed Code'),
						'#rows' => 3,
						'#weight' => -1,
					);
					break;
			}
			return $form;
				case 'validate':
					// return a valid asset aid
					switch ($delta) {
						case 'embed':
							if ($data = asset_embed_extract_id($form_values['provider'], $form_values['embed'])) {
								$path = $form_values['parent'] .'/'. $data['id'] .'.'. $form_values['provider'];
								$asset->filepath = $path;
								$asset->type = 'embed';
								$asset->embed_data = $data;
								$asset = asset_save($asset, $form_values);
								return $asset->aid;
							} else {
								form_set_error('embed', 'Error extracting video ID.</em>');
							}
							break;
					}
					break;
						case 'submit':
							// must return a valid asset aid
							switch ($delta) {
							}
							break;
	}

}

function asset_embed_asset_formatter($op='info', $asset=null, $attr=array()) {
	$providers = asset_embed_list_providers();
	switch ($op) {
		case 'info':
			$formats['fullsize'] = array(
				'name' => 'Full-Size Embed',
				'types' => array('embed' => array('*')),
				'description' => t('Display the full-size version of the embedded content.'),
			);
			$formats['thumbnail'] = array(
				'name' => 'Thumbnail Embed',
				'types' => array('embed' => array('*')),
				'description' => t('Display a thumbnail preview image of the embedded content.'),
			);
			return $formats;
		case 'init':
			break;
		case 'options':
			switch ($attr['format']) {
				case 'thumbnail':
					$form['height'] = array(
						'#type' => 'textfield',
						'#title' => t('Height'),
						'#size' => '10',
						'#default_value' => '120',
					);
					$form['width'] = array(
						'#type' => 'textfield',
						'#title' => t('Width'),
						'#size' => '10',
						'#default_value' => '160',
					);
					break;
				case 'fullsize':
					$form['height'] = array(
						'#type' => 'textfield',
						'#title' => t('Height'),
						'#size' => '10',
						'#default_value' => '335',            
					);
					$form['width'] = array(
						'#type' => 'textfield',
						'#title' => t('Width'),
						'#size' => '10',
						'#default_value' => '425',            
					);
					break;
			}
			$form = array_merge($form, (array)asset_embed_invoke($asset->embed['provider'], 'formatter_options', $asset, $attr['format']));
			return $form;
				case 'preview':
					if (function_exists('theme_asset_embed_'. $asset->embed['provider'] .'_thumbnail')) {
						return theme('asset_embed_'. $asset->embed['provider'] .'_thumbnail', $asset);
					}
					return theme('asset_embed_thumbnail', $asset);
				case 'img':
					return asset_embed_invoke($asset->embed['provider'], 'thumbnail_src', $asset, $attr);
					break;
				case 'details':
					break;
				case 'render':
					switch ($attr['format']) {
						case 'thumbnail':
							if (function_exists('theme_asset_embed_'. $asset->embed['provider'] .'_thumbnail')) {
								return theme('asset_embed_'. $asset->embed['provider'] .'_thumbnail', $asset);
							}
							return theme('asset_embed_thumbnail', $asset);
							break;
						case 'fullsize':
						default:
							if (function_exists('theme_asset_embed_'. $asset->embed['provider'] .'_fullsize')) {
								return theme('asset_embed_'. $asset->embed['provider'] .'_fullsize', $asset, $attr);
							}
							return theme('asset_embed_fullsize', $asset, $attr);
					}
					break;
	}
}

function asset_embed_assetapi($op='list', $asset=null) {
	switch ($op) {
		case 'load':
			if ($asset->type == 'embed') {
				$fields['embed'] = unserialize(db_result(db_query('SELECT data FROM {asset_embed} WHERE aid = %d', $asset->aid)));
				$fields['embed']['provider'] = $asset->extension;
			}
			return $fields;
		case 'insert':
			if ($asset->type == 'embed') {
				db_query("INSERT INTO {asset_embed} (aid, data) VALUES (%d, '%s')", $asset->aid, serialize($asset->embed_data));
			}
			break;
	}
}
?>