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<?php
/**
 * Main PHP class for the WordPress plugin NextGEN Gallery
 *
 * @author Alex Rabe
 */
class nggGallery {

	/**
	 * Show a error messages
	 */
	static function show_error( $message ) {
		echo '<div class="wrap"><h2></h2><div class="error" id="error"><p>' . $message . '</p></div></div>' . "\n";
	}

	/**
	 * Show a system messages
	 */
	static function show_message( $message, $message_id = null ) {
		echo '<div class="wrap"><h2></h2><div class="updated fade ' . $message_id . '" id="message"><p>' . $message . '</p></div></div>' . "\n";
	}

	/**
	 * nggGallery::get_option() - get the options and overwrite them with custom meta settings
	 *
	 * @param string $key
	 * @return array $options
	 */
	static function get_option( $key ) {
		global $post;

		// get first the options from the database
		$options = get_option( $key );

		if ( $post == null ) {
			return $options;
		}

		// Get all key/value data for the current post.
		$meta_array = get_post_custom();

		// Ensure that this is a array
		if ( !is_array( $meta_array ) ) {
			$meta_array = array( $meta_array );
		}

		// assign meta key to db setting key
		$meta_tags = array(
			'string' => array(
				'ngg_gal_ShowOrder'         => 'galShowOrder',
				'ngg_gal_Sort'              => 'galSort',
				'ngg_gal_SortDirection'     => 'galSortDir',
				'ngg_gal_ShowDescription'   => 'galShowDesc',
				'ngg_ir_Audio'              => 'irAudio',
				'ngg_ir_Overstretch'        => 'irOverstretch',
				'ngg_ir_Transition'         => 'irTransition',
				'ngg_ir_Backcolor'          => 'irBackcolor',
				'ngg_ir_Frontcolor'         => 'irFrontcolor',
				'ngg_ir_Lightcolor'         => 'irLightcolor',
				'ngg_slideshowFX'           => 'slideFx',
			),

			'int' => array(
				'ngg_gal_Images'            => 'galImages',
				'ngg_gal_Columns'           => 'galColumns',
				'ngg_paged_Galleries'       => 'galPagedGalleries',
				'ngg_ir_Width'              => 'irWidth',
				'ngg_ir_Height'             => 'irHeight',
				'ngg_ir_Rotatetime'         => 'irRotatetime',
			),

			'bool' => array(
				'ngg_gal_ShowSlide'         => 'galShowSlide',
				'ngg_gal_ImageBrowser'      => 'galImgBrowser',
				'ngg_gal_HideImages'        => 'galHiddenImg',
				'ngg_ir_Shuffle'            => 'irShuffle',
				'ngg_ir_LinkFromDisplay'    => 'irLinkfromdisplay',
				'ngg_ir_ShowNavigation'     => 'irShownavigation',
				'ngg_ir_ShowWatermark'      => 'irWatermark',
				'ngg_ir_Kenburns'           => 'irKenburns',
			),
		);

		foreach ($meta_tags as $typ => $meta_keys) {
			foreach ($meta_keys as $key => $db_value) {
				// if the kex exist overwrite it with the custom field
				if (array_key_exists( $key, $meta_array )) {
					switch ($typ) {
						case 'string':
							$options[$db_value] = (string) esc_attr( $meta_array[$key][0] );
							break;
						case 'int':
							$options[$db_value] = (int) $meta_array[$key][0];
							break;
						case 'bool':
							$options[$db_value] = (bool) $meta_array[$key][0];
							break;
					}
				}
			}
		}

		return $options;
	}

	/**
	 * Renders a section of user display code.  The code is first checked for in the current theme display directory
	 * before defaulting to the plugin
	 * Call the function :   nggGallery::render ('template_name', array ('var1' => $var1, 'var2' => $var2));
	 *
	 * @autor John Godley
	 * @param string $template_name Name of the template file (without extension)
	 * @param string $vars Array of variable name=>value that is available to the display code (optional)
	 * @param bool   $callback In case we check we didn't find template we tested it one time more (optional)
	 * @return void
	 **/
	static function render( $template_name, $vars = array(), $callback = false ) {
		$vars['template'] = $template_name;
		echo \Imagely\NGG\DisplayedGallery\Renderer::get_instance()->display_images( $vars );
	}

	/**
	 * Captures an section of user display code.
	 *
	 * @autor John Godley
	 * @param string $template_name Name of the template file (without extension)
	 * @param string $vars Array of variable name=>value that is available to the display code (optional)
	 * @deprecated Use Imagely\NGG\DisplayedGallery\Renderer class
	 * @return string
	 **/
	static function capture( $template_name, $vars = array() ) {
		$vars['template'] = $template_name;
		return \Imagely\NGG\DisplayedGallery\Renderer::get_instance()->display_images( $vars );
	}

	/**
	 * Returns the path to lib/gd.thumbnail.inc.php
	 *
	 * @return string Path to the selected library
	 */
	static function graphic_library() {
		return NGGALLERY_ABSPATH . '/lib/gd.thumbnail.inc.php';
	}

	/**
	 * Support for i18n with wpml, polyglot or qtrans
	 *
	 * @param string $in
	 * @param string $name (optional) required for wpml to determine the type of translation
	 * @return string $in localized
	 */
	static function i18n( $in, $name = null ) {

		if ( function_exists( 'langswitch_filter_langs_with_message' ) ) {
			$in = langswitch_filter_langs_with_message( $in );
		}

		if ( function_exists( 'polyglot_filter' )) {
			$in = polyglot_filter( $in );
		}

		if ( function_exists( 'qtrans_useCurrentLanguageIfNotFoundUseDefaultLanguage' )) {
			$in = qtrans_useCurrentLanguageIfNotFoundUseDefaultLanguage( $in );
		}

		if (is_string( $name ) && !empty( $name ) && function_exists( 'icl_translate' )) {
			$in = icl_translate( 'plugin_ngg', $name, $in, true );
		}

		$in = apply_filters( 'localization', $in );

		return $in;
	}

	/**
	 * Check the memory_limit and calculate a recommended memory size
	 *
	 * @since V1.2.0
	 * @return string message about recommended image size
	 */
	static function check_memory_limit() {

		if ( ( function_exists( 'memory_get_usage' ) ) && ( ini_get( 'memory_limit' ) ) ) {

			// get memory limit
			$memory_limit = ini_get( 'memory_limit' );
			if ($memory_limit != '') {
				$memory_limit = substr( $memory_limit, 0, -1 ) * 1024 * 1024;
			}

			// calculate the free memory
			$freeMemory = $memory_limit - memory_get_usage();

			// build the test sizes
			$sizes   = array();
			$sizes[] = array( 'width' => 800, 'height' => 600 );
			$sizes[] = array( 'width' => 1024, 'height' => 768 );
			$sizes[] = array( 'width' => 1280, 'height' => 960 );  // 1MP
			$sizes[] = array( 'width' => 1600, 'height' => 1200 ); // 2MP
			$sizes[] = array( 'width' => 2016, 'height' => 1512 ); // 3MP
			$sizes[] = array( 'width' => 2272, 'height' => 1704 ); // 4MP
			$sizes[] = array( 'width' => 2560, 'height' => 1920 ); // 5MP

			// test the classic sizes
			foreach ($sizes as $size) {
				// very, very rough estimation
				if ($freeMemory < round( $size['width'] * $size['height'] * 5.09 )) {
					$result = sprintf( __( 'Note : Based on your server memory limit you should not upload larger images then <strong>%d x %d</strong> pixel', 'nggallery' ), $size['width'], $size['height'] );
					return $result;
				}
			}
		}
		return '';
	}

	/**
	 * Check for extended capabilites. Must previously registers with add_ngg_capabilites()
	 *
	 * @since 1.5.0
	 * @param string $capability
	 * @return bool $result of capability check
	 */
	static function current_user_can( $capability ) {

		global $_ngg_capabilites;

		if ( is_array( $_ngg_capabilites ) ) {
			if ( in_array( $capability, $_ngg_capabilites ) ) {
				return current_user_can( $capability );
			}
		}

		return true;
	}
}