/lib/timber.php

<?php

/**
 * Timber Class.
 *
 * Main class called Timber for this plugin.
 *
 * Usage:
 *  $posts = Timber::get_posts();
 *  $posts = Timber::get_posts('post_type = article')
 *  $posts = Timber::get_posts(array('post_type' => 'article', 'category_name' => 'sports')); // uses wp_query format.
 *  $posts = Timber::get_posts(array(23,24,35,67), 'InkwellArticle');
 *
 *  $context = Timber::get_context(); // returns wp favorites!
 *  $context['posts'] = $posts;
 *  Timber::render('index.twig', $context);
 */
class Timber {

	public static $locations;
	public static $dirname;
	public static $twig_cache = false;
	public static $cache = false;
	public static $auto_meta = true;
	public static $autoescape = false;

	/**
	 * @codeCoverageIgnore
	 */
	public function __construct() {
		if ( !defined('ABSPATH') ) {
			return;
		}
		$this->test_compatibility();
		$this->init_constants();
		$this->init();
	}

	/**
	 * Tests whether we can use Timber
	 * @codeCoverageIgnore
	 * @return
	 */
	protected function test_compatibility() {
		if ( is_admin() || $_SERVER['PHP_SELF'] == '/wp-login.php' ) {
			return;
		}
		if ( version_compare( phpversion(), '5.3.0', '<' ) && !is_admin() ) {
			trigger_error( 'Timber requires PHP 5.3.0 or greater. You have '.phpversion(), E_USER_ERROR );
		}
		if ( !class_exists( 'Twig_Autoloader' ) ) {
			trigger_error( 'You have not run "composer install" to download required dependencies for Timber, you can read more on https://github.com/timber/timber#installation', E_USER_ERROR );
		}
	}

	function init_constants() {
		defined( "TIMBER_LOC" ) or define( "TIMBER_LOC", realpath( dirname(__DIR__) ) );
	}

	/**
	 * @codeCoverageIgnore
	 */
	protected function init() {
		TimberTwig::init();
		TimberRoutes::init( $this );
		TimberImageHelper::init();
		TimberAdmin::init();
		TimberIntegrations::init();
	}

	/* Post Retrieval Routine
	================================ */

	/**
	 * Get post.
	 *
	 * @param mixed   $query
	 * @param string  $PostClass
	 * @return array|bool|null
	 */
	public static function get_post( $query = false, $PostClass = 'TimberPost' ) {
		return TimberPostGetter::get_post( $query, $PostClass );
	}

	/**
	 * Get posts.
	 * @example
	 * ```php
	 * $posts = Timber::get_posts();
 	 *  $posts = Timber::get_posts('post_type = article')
 	 *  $posts = Timber::get_posts(array('post_type' => 'article', 'category_name' => 'sports')); // uses wp_query format.
 	 *  $posts = Timber::get_posts('post_type=any', array('portfolio' => 'MyPortfolioClass', 'alert' => 'MyAlertClass')); //use a classmap for the $PostClass
	 * ```
	 * @param mixed   $query
	 * @param string|array  $PostClass
	 * @return array|bool|null
	 */
	public static function get_posts( $query = false, $PostClass = 'TimberPost', $return_collection = false ) {
		return TimberPostGetter::get_posts( $query, $PostClass, $return_collection );
	}

	/**
	 * Query post.
	 *
	 * @param mixed   $query
	 * @param string  $PostClass
	 * @return array|bool|null
	 */
	public static function query_post( $query = false, $PostClass = 'TimberPost' ) {
		return TimberPostGetter::query_post( $query, $PostClass );
	}

	/**
	 * Query posts.
	 *
	 * @param mixed   $query
	 * @param string  $PostClass
	 * @return array|bool|null
	 */
	public static function query_posts( $query = false, $PostClass = 'TimberPost' ) {
		return TimberPostGetter::query_posts( $query, $PostClass );
	}

	/**
	 * WP_Query has posts.
	 *
	 * @return bool
	 * @deprecated since 0.20.0
	 */
	static function wp_query_has_posts() {
		return TimberPostGetter::wp_query_has_posts();
	}

	/* Term Retrieval
	================================ */

	/**
	 * Get terms.
	 *
	 * @param string|array $args
	 * @param array   $maybe_args
	 * @param string  $TermClass
	 * @return mixed
	 */
	public static function get_terms( $args = null, $maybe_args = array(), $TermClass = 'TimberTerm' ) {
		return TimberTermGetter::get_terms( $args, $maybe_args, $TermClass );
	}

	/* Site Retrieval
	================================ */

	/**
	 * Get sites.
	 *
	 * @param array|bool $blog_ids
	 * @return array
	 */
	public static function get_sites( $blog_ids = false ) {
		if ( !is_array( $blog_ids ) ) {
			global $wpdb;
			$blog_ids = $wpdb->get_col( "SELECT blog_id FROM $wpdb->blogs ORDER BY blog_id ASC" );
		}
		$return = array();
		foreach ( $blog_ids as $blog_id ) {
			$return[] = new TimberSite( $blog_id );
		}
		return $return;
	}


	/*  Template Setup and Display
	================================ */

	/**
	 * Get context.
	 *
	 * @return array
	 */
	public static function get_context() {
		$data = array();
		$data['http_host'] = 'http://' . TimberURLHelper::get_host();
		$data['wp_title'] = TimberHelper::get_wp_title();
		$data['wp_head'] = TimberHelper::function_wrapper( 'wp_head' );
		$data['wp_footer'] = TimberHelper::function_wrapper( 'wp_footer' );
		$data['body_class'] = implode( ' ', get_body_class() );

		$data['site'] = new TimberSite();
		$data['request'] = new TimberRequest();
		$user = new TimberUser();
		$data['user'] = ($user->ID) ? $user : false;
		$data['theme'] = $data['site']->theme;

		$data['posts'] = Timber::query_posts();

		$data = apply_filters( 'timber_context', $data );
		$data = apply_filters( 'timber/context', $data );
		return $data;
	}

	/**
	 * Compile function.
	 *
	 * @param array   $filenames
	 * @param array   $data
	 * @param bool    $expires
	 * @param string  $cache_mode
	 * @param bool    $via_render
	 * @return bool|string
	 */
	public static function compile( $filenames, $data = array(), $expires = false, $cache_mode = TimberLoader::CACHE_USE_DEFAULT, $via_render = false ) {
		$caller = self::get_calling_script_dir();
		$caller_file = self::get_calling_script_file();
		$caller_file = apply_filters( 'timber_calling_php_file', $caller_file );
		$loader = new TimberLoader( $caller );
		$file = $loader->choose_template( $filenames );
		$output = '';
		if ( is_null( $data ) ) {
			$data = array();
		}
		if ( strlen( $file ) ) {
			if ( $via_render ) {
				$file = apply_filters( 'timber_render_file', $file );
				$data = apply_filters( 'timber_render_data', $data );
			} else {
				$file = apply_filters( 'timber_compile_file', $file );
				$data = apply_filters( 'timber_compile_data', $data );
			}
			$output = $loader->render( $file, $data, $expires, $cache_mode );
		}
		do_action( 'timber_compile_done' );
		return $output;
	}

	/**
	 * Compile string.
	 *
	 * @param string  $string a string with twig variables.
	 * @param array   $data   an array with data in it.
	 * @return  bool|string
	 */
	public static function compile_string( $string, $data = array() ) {
		$dummy_loader = new TimberLoader();
		$twig = $dummy_loader->get_twig();
		$template = $twig->createTemplate($string);
		return $template->render( $data );
	}

	/**
	 * Fetch function.
	 *
	 * @param array   $filenames
	 * @param array   $data
	 * @param bool    $expires
	 * @param string  $cache_mode
	 * @return bool|string
	 */
	public static function fetch( $filenames, $data = array(), $expires = false, $cache_mode = TimberLoader::CACHE_USE_DEFAULT ) {
		if ( $expires === true ) {
			//if this is reading as true; the user probably is using the old $echo param
			//so we should move all vars up by a spot
			$expires = $cache_mode;
			$cache_mode = TimberLoader::CACHE_USE_DEFAULT;
		}
		$output = self::compile( $filenames, $data, $expires, $cache_mode, true );
		$output = apply_filters( 'timber_compile_result', $output );
		return $output;
	}

	/**
	 * Render function.
	 *
	 * @param array   $filenames
	 * @param array   $data
	 * @param bool    $expires
	 * @param string  $cache_mode
	 * @return bool|string
	 */
	public static function render( $filenames, $data = array(), $expires = false, $cache_mode = TimberLoader::CACHE_USE_DEFAULT ) {
		$output = static::fetch( $filenames, $data, $expires, $cache_mode );
		echo $output;
		return $output;
	}

	/**
	 * Render string.
	 *
	 * @param string  $string a string with twig variables.
	 * @param array   $data   an array with data in it.
	 * @return  bool|string
	 */
	public static function render_string( $string, $data = array() ) {
		$compiled = self::compile_string( $string, $data );
		echo $compiled;
		return $compiled;
	}


	/*  Sidebar
	================================ */

	/**
	 * Get sidebar.
	 *
	 * @param string  $sidebar
	 * @param array   $data
	 * @return bool|string
	 */
	public static function get_sidebar( $sidebar = '', $data = array() ) {
		if ( $sidebar == '' ) {
			$sidebar = 'sidebar.php';
		}
		if ( strstr( strtolower( $sidebar ), '.php' ) ) {
			return self::get_sidebar_from_php( $sidebar, $data );
		}
		return self::compile( $sidebar, $data );
	}

	/**
	 * Get sidebar from PHP
	 *
	 * @param string  $sidebar
	 * @param array   $data
	 * @return string
	 */
	public static function get_sidebar_from_php( $sidebar = '', $data ) {
		$caller = self::get_calling_script_dir();
		$loader = new TimberLoader();
		$uris = $loader->get_locations( $caller );
		ob_start();
		$found = false;
		foreach ( $uris as $uri ) {
			if ( file_exists( trailingslashit( $uri ) . $sidebar ) ) {
				include trailingslashit( $uri ) . $sidebar;
				$found = true;
				break;
			}
		}
		if ( !$found ) {
			TimberHelper::error_log( 'error loading your sidebar, check to make sure the file exists' );
		}
		$ret = ob_get_contents();
		ob_end_clean();
		return $ret;
	}

	/* Widgets
	================================ */

	/**
	 * Get widgets.
	 *
	 * @param int     $widget_id
	 * @return TimberFunctionWrapper
	 */
	public static function get_widgets( $widget_id ) {
		return trim( TimberHelper::function_wrapper( 'dynamic_sidebar', array( $widget_id ), true ) );
	}


	/*  Routes
	================================ */

	/**
	 * Add route.
	 *
	 * @param string  $route
	 * @param callable $callback
	 * @param array   $args
	 * @deprecated since 0.20.0
	 */
	public static function add_route( $route, $callback, $args = array() ) {
		Routes::map( $route, $callback, $args );
	}

	/**
	 * Load template.
	 *
	 * @deprecated since 0.20.0
	 */
	public static function load_template( $template, $query = false, $status_code = 200, $tparams = false ) {
		return Routes::load( $template, $tparams, $query, $status_code );
	}

	/**
	 * Load view.
	 *
	 * @deprecated since 0.20.2
	 */
	public static function load_view( $template, $query = false, $status_code = 200, $tparams = false ) {
		return Routes::load( $template, $tparams, $query, $status_code );
	}


	/*  Pagination
	================================ */

	/**
	 * Get pagination.
	 *
	 * @param array   $prefs
	 * @return array mixed
	 */
	public static function get_pagination( $prefs = array() ) {
		global $wp_query;
		global $paged;
		global $wp_rewrite;
		$args = array();
		$args['total'] = ceil( $wp_query->found_posts / $wp_query->query_vars['posts_per_page'] );
		if ( $wp_rewrite->using_permalinks() ) {
			$url = explode( '?', get_pagenum_link( 0 ) );
			if ( isset( $url[1] ) ) {
				parse_str( $url[1], $query );
				$args['add_args'] = $query;
			}
			$args['format'] = 'page/%#%';
			$args['base'] = trailingslashit( $url[0] ).'%_%';
		} else {
			$big = 999999999;
			$args['base'] = str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) );
		}
		$args['type'] = 'array';
		$args['current'] = max( 1, get_query_var( 'paged' ) );
		$args['mid_size'] = max( 9 - $args['current'], 3 );
		if ( is_int( $prefs ) ) {
			$args['mid_size'] = $prefs - 2;
		} else {
			$args = array_merge( $args, $prefs );
		}
		$data = array();
		$data['current'] = $args['current'];
		$data['total'] = $args['total'];
		$data['pages'] = TimberHelper::paginate_links( $args );
		$next = get_next_posts_page_link( $args['total'] );
		if ( $next ) {
			$data['next'] = array( 'link' => untrailingslashit( $next ), 'class' => 'page-numbers next' );
		}
		$prev = previous_posts( false );
		if ( $prev ) {
			$data['prev'] = array( 'link' => untrailingslashit( $prev ), 'class' => 'page-numbers prev' );
		}
		if ( $paged < 2 ) {
			$data['prev'] = '';
		}
		if ( $data['total'] === ( double ) 0 ) {
			$data['next'] = '';
		}
		return $data;
	}

	/*  Utility
	================================ */

	/**
	 * Get calling script dir.
	 *
	 * @return string
	 */
	public static function get_calling_script_dir( $offset = 0 ) {
		$caller = self::get_calling_script_file( $offset );
		if ( !is_null( $caller ) ) {
			$pathinfo = pathinfo( $caller );
			$dir = $pathinfo['dirname'];
			return $dir;
		}
	}

	/**
	 * Get calling script file.
	 *
	 * @param int     $offset
	 * @return string|null
	 * @deprecated since 0.20.0
	 */
	public static function get_calling_script_file( $offset = 0 ) {
		$caller = null;
		$backtrace = debug_backtrace();
		$i = 0;
		foreach ( $backtrace as $trace ) {
			if ( array_key_exists('file', $trace) && $trace['file'] != __FILE__ ) {
				$caller = $trace['file'];
				break;
			}
			$i++;
		}
		if ( $offset ) {
			$caller = $backtrace[$i + $offset]['file'];
		}
		return $caller;
	}


}

$timber = new Timber();
Timber::$dirname = 'views';