presscodes/maera

<?php

class Maera_Caching {

    function __construct() {

        add_action( 'customize_save_after', array( $this, 'reset_style_cache_on_customizer_save' ) );
        add_action( 'wp_enqueue_scripts', array( $this, 'custom_css_cached' ), 101 );
        add_action( 'init', array( $this, 'timber_customizations' ) );
        add_filter( 'timber/cache/location', array( $this, 'change_twig_cache_dir' ) );

    }

    /**
     * Reset the cache when saving the customizer
     */
    function reset_style_cache_on_customizer_save() {
        remove_theme_mod( 'css_cache' );
    }

    function custom_css_cached() {

        if ( Maera()->dev->dev_mode() ) {
            // Get our styles using the maera/styles filter
            $data = apply_filters( 'maera/styles', null );
        } else {
            // Get the cached CSS from the database
            $cache = get_theme_mod( 'css_cache', '' );
            // If the transient does not exist, then create it.
            if ( ! $cache || empty( $cache ) || '' == $cache ) {
                // Get our styles using the maera/styles filter
                $data = apply_filters( 'maera/styles', null );
                // Set the transient for 24 hours.
                set_theme_mod( 'css_cache', $data );
            } else {
                $data = $cache;
            }
        }

        // Add the CSS inline.
        // See http://codex.wordpress.org/Function_Reference/wp_add_inline_style#Examples
        wp_add_inline_style( 'maera', $data );

    }

    /**
     * Apply global Timber customizations
     */
    function timber_customizations() {

        // Early exit if Timber is not installed
        if ( ! class_exists( 'Timber' ) ) {
            return;
        }
        global $wp_customize;

        if ( ! Maera()->dev->dev_mode() ) {

            // Turn on Timber caching.
            // See https://github.com/jarednova/timber/wiki/Performance#cache-the-twig-file-but-not-the-data

            // This is a bit buggy right now on some hosts so we're disabling it.
            // Timber::$cache = true;
            $this->cache_mode();


        } else {

            TimberLoader::CACHE_NONE;
            Timber::$cache = false;

            $_SERVER['QUICK_CACHE_ALLOWED'] = FALSE;
            Maera_Helper::define( 'DONOTCACHEPAGE', TRUE );

        }

    }

    /**
     * Timber caching
     */
    public function cache_duration() {

        $theme_options = get_option( 'maera_admin_options', array() );

        $cache_int = isset( $theme_options['cache'] ) ? intval( $theme_options['cache'] ) : 0;

        if ( 0 == $cache_int ) {

            // No need to proceed if cache=0
            return false;

        }

        // Convert minutes to seconds
        return ( $cache_int * 60 );

    }

    /**
     * Custom implementation for get_context method.
     * Implements caching
     */
    public function get_context() {

        if ( Maera()->dev->dev_mode() ) {
            $cached = false;
        } else {
            $cache  = wp_cache_get( 'context', 'maera' );
            $cached = ( $cache ) ? true : false;
        }

        if ( $cached && $cache ) {
            return $cache;
        } else {
            $context = Maera()->timber->get_context();
            wp_cache_set( 'context', $context, 'maera' );
            return $context;
        }

    }

    public function cache_mode() {

        $options    = get_option( 'maera_admin_options', array() );
        $cache_mode = isset( $options['cache_mode'] ) ? $options['cache_mode'] : 'default';

        if ( 'none' == $cache_mode ) {
            $mode = TimberLoader::CACHE_NONE;
        } else if ( 'object' == $cache_mode ) {
            $mode = TimberLoader::CACHE_OBJECT;
        } else if ( 'transient' == $cache_mode ) {
            $mode = TimberLoader::CACHE_TRANSIENT;
        } else {
            $mode = TimberLoader::CACHE_USE_DEFAULT;
        }

        return $mode;

    }
    
    /**
     * Change Timber's cache folder.
     * We want to use wp-content/cache/timber
     */
     function change_twig_cache_dir() {
         return WP_CONTENT_DIR . '/cache/timber';
     }

}