mirror of
https://github.com/10h30/display-featured-image-genesis.git
synced 2026-06-05 15:08:20 +09:00
Robin Cornett
263 lines
8.9 KiB
PHP
263 lines
8.9 KiB
PHP
<?php
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/**
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* Common functions for plugin
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*
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* @package DisplayFeaturedImageGenesis
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* @since 1.2.1
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*/
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class Display_Featured_Image_Genesis_Common {
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/**
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* current plugin version
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* @var string
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* @since 1.4.3
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*/
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public static $version = '2.2.0';
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protected static $post_types;
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/**
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* set and retreive variables for the featured image.
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* @return $item
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*
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* @since 1.1.0
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*/
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public static function get_image_variables() {
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self::$post_types = array();
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$item = new stdClass();
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// variables internal to this function
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$frontpage = get_option( 'show_on_front' ); // either 'posts' or 'page'
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$postspage = get_option( 'page_for_posts' );
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$displaysetting = get_option( 'displayfeaturedimagegenesis' );
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$move_excerpts = $displaysetting['move_excerpts'];
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$postspage_image = get_post_thumbnail_id( $postspage );
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$fallback = $displaysetting['default']; // url only
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$medium = absint( get_option( 'medium_size_w' ) );
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if ( is_singular() ) { // just checking for handling conditional variables set by width
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$thumb_metadata = wp_get_attachment_metadata( get_post_thumbnail_id( get_the_ID() ) ); // needed only for the next line
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$width = '';
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if ( $thumb_metadata ) {
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$width = $thumb_metadata['width'];
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}
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}
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// sitewide variables used outside this function
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$item->backstretch = '';
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$fallback_id = $fallback;
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if ( ! is_numeric( $fallback ) ) {
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$fallback_id = self::get_image_id( $fallback ); // gets image id with attached metadata
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}
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$item->fallback_id = absint( $fallback_id );
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// Set Featured Image source ID
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$image_id = ''; // blank if nothing else
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/**
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* create a filter to use the fallback image
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* @var filter
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* @since 2.0.0 (deprecated old use_fallback_image function from 1.2.2)
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*/
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$use_fallback = apply_filters( 'display_featured_image_genesis_use_default', self::$post_types );
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// set here with fallback preemptively, if it exists
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if ( ! empty( $fallback ) ) {
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$image_id = $item->fallback_id;
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}
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// outlier: if it's a home page with a static front page, and there is a featured image set on the home page
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if ( is_home() && 'page' === $frontpage && ! empty( $postspage_image ) ) {
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$image_id = $postspage_image;
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}
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$object = get_queried_object();
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// cpt
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if ( $object && is_main_query() && ! is_admin() ) {
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$post_type = '';
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if ( $object->name ) { // results in post type on cpt archive
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$post_type = $object->name;
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}
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elseif ( $object->taxonomy ) { // on a tax/term/category
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$tax_object = get_taxonomy( $object->taxonomy );
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$post_type = $tax_object->object_type[0];
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}
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elseif ( $object->post_type ) { // on singular
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$post_type = $object->post_type;
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}
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if ( ! empty( $displaysetting['post_type'][$post_type] ) ) {
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$image_id = $displaysetting['post_type'][$post_type];
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// if $image_id is using the old URL
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if ( ! is_numeric( $displaysetting['post_type'][$post_type] ) ) {
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$image_id = self::get_image_id( $displaysetting['post_type'][$post_type] );
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}
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}
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}
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// taxonomy
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if ( is_category() || is_tag() || is_tax() ) {
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$t_id = $object->term_id;
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$term_meta = get_option( "displayfeaturedimagegenesis_$t_id" );
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// if there is a term image
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if ( ! empty( $term_meta['term_image'] ) ) {
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$image_id = $term_meta['term_image'];
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// if $image_id is using the old URL
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if ( ! is_numeric( $term_meta['term_image'] ) ) {
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$image_id = self::get_image_id( $term_meta['term_image'] );
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}
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}
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}
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// any singular post/page/CPT or there is no $fallback
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elseif ( is_singular() && ! in_array( get_post_type(), $use_fallback ) ) {
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/**
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* create filter to use taxonomy image if single post doesn't have a thumbnail, but one of its terms does.
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* @var filter
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*/
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$use_tax_image = apply_filters( 'display_featured_image_genesis_use_taxonomy', self::$post_types );
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if ( has_post_thumbnail() && $width > $medium ) {
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$image_id = get_post_thumbnail_id( get_the_ID() );
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}
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elseif ( ! has_post_thumbnail() || in_array( get_post_type(), $use_tax_image ) ) {
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$term_image_id = display_featured_image_genesis_get_term_image_id();
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if ( ! empty( $term_image_id ) ) {
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$image_id = $term_image_id;
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}
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}
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}
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// make sure the image id is an integer
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$image_id = absint( $image_id );
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// turn Photon off so we can get the correct image
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$photon_removed = '';
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if ( class_exists( 'Jetpack' ) && Jetpack::is_module_active( 'photon' ) ) {
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$photon_removed = remove_filter( 'image_downsize', array( Jetpack_Photon::instance(), 'filter_image_downsize' ) );
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}
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/**
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* create a filter for user to optionally force post types to use the large image instead of backstretch
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* @var filter
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*
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* @since 2.0.0
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*/
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$use_large_image = apply_filters( 'display_featured_image_genesis_use_large_image', self::$post_types );
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$image_size = 'displayfeaturedimage_backstretch';
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if ( in_array( get_post_type(), $use_large_image ) ) {
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$image_size = 'large';
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}
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$item->backstretch = wp_get_attachment_image_src( $image_id, $image_size );
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// set a content variable so backstretch doesn't show if full size image exists in post.
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$item->content = '';
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// declare this last so that $item->backstretch is set.
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if ( ! is_admin() && is_singular() ) {
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$fullsize = wp_get_attachment_image_src( $image_id, 'original' );
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$post = get_post();
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$item->content = strpos( $post->post_content, 'src="' . $fullsize[0] );
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if ( false !== $item->content ) {
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$term_image = display_featured_image_genesis_get_term_image_id();
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// reset backstretch image source to term image if it exists and the featured image is being used in content.
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if ( ! empty( $term_image ) ) {
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$item->backstretch = wp_get_attachment_image_src( $term_image, $image_size );
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$item->content = strpos( $post->post_content, 'src="' . $item->backstretch[0] );
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}
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// else, reset backstretch image source to fallback.
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elseif ( ! empty( $item->fallback ) ) {
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$item->backstretch = wp_get_attachment_image_src( $item->fallback_id, $image_size );
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$item->content = strpos( $post->post_content, 'src="' . $item->backstretch[0] );
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}
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}
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}
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// turn Photon back on
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if ( $photon_removed ) {
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add_filter( 'image_downsize', array( Jetpack_Photon::instance(), 'filter_image_downsize' ), 10, 3 );
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}
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// Set Post/Page Title
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$title = '';
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if ( is_singular() ) {
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$title = get_the_title();
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}
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elseif ( is_home() && 'page' === $frontpage ) {
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$title = get_post( $postspage )->post_title;
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}
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elseif ( is_category() || is_tag() || is_tax() ) {
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$term = is_tax() ? get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) ) : get_queried_object();
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if ( ! $term || ! isset( $term->meta ) ) {
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return;
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}
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$title = $term->meta['headline'];
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}
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elseif ( is_author() ) {
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$title = get_the_author_meta( 'headline', (int) get_query_var( 'author' ) );
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}
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elseif ( is_post_type_archive() && genesis_has_post_type_archive_support() ) {
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$title = genesis_get_cpt_option( 'headline' );
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}
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$item->title = apply_filters( 'display_featured_image_genesis_title', $title );
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return $item;
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}
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/**
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* Get the ID of each image dynamically.
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*
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* @since 1.2.0
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*
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* @author Philip Newcomer
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* @link http://philipnewcomer.net/2012/11/get-the-attachment-id-from-an-image-url-in-wordpress/
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*/
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public static function get_image_id( $attachment_url = '' ) {
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global $wpdb;
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$attachment_id = false;
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// If there is no url, return.
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if ( '' == $attachment_url ) {
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return;
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}
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// Get the upload directory paths
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$upload_dir_paths = wp_upload_dir();
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// Make sure the upload path base directory exists in the attachment URL, to verify that we're working with a media library image
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if ( false !== strpos( $attachment_url, $upload_dir_paths['baseurl'] ) ) {
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// If this is the URL of an auto-generated thumbnail, get the URL of the original image
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$attachment_url = preg_replace( '/-\d+x\d+(?=\.(jpg|jpeg|png|gif)$)/i', '', $attachment_url );
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// Remove the upload path base directory from the attachment URL
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$attachment_url = str_replace( $upload_dir_paths['baseurl'] . '/', '', $attachment_url );
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// Finally, run a custom database query to get the attachment ID from the modified attachment URL
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$attachment_id = $wpdb->get_var( $wpdb->prepare( "SELECT wposts.ID FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta WHERE wposts.ID = wpostmeta.post_id AND wpostmeta.meta_key = '_wp_attached_file' AND wpostmeta.meta_value = '%s' AND wposts.post_type = 'attachment'", $attachment_url ) );
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}
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return $attachment_id;
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}
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/**
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* add a filter to change the minimum width required for backstretch image
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* @return integer sets the minimum width for backstretch effect
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*
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* @since 2.2.0
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*/
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public static function minimum_backstretch_width() {
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$large = apply_filters( 'display_featured_image_genesis_set_minimum_backstretch_width', get_option( 'large_size_w' ) );
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if ( ! is_numeric( $large ) ) {
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$large = get_option( 'large_size_w' );
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}
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return absint( intval( $large ) );
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}
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}
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