mirror of
https://github.com/10h30/display-featured-image-genesis.git
synced 2026-06-05 15:08:20 +09:00
Robin Cornett
317 lines
10 KiB
PHP
317 lines
10 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 $version = '2.4.0';
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/**
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* set and retreive variables for the featured image.
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* @return $item
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*
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* @since 1.1.0
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*/
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public static function get_image_variables() {
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$item = new stdClass();
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// variables internal to this function
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$displaysetting = get_option( 'displayfeaturedimagegenesis' );
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$fallback = $displaysetting['default']; // url only
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// sitewide variables used outside this function
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$item->backstretch = '';
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add_filter( 'jetpack_photon_override_image_downsize', '__return_true' ); // turn Photon off so we can get the correct image
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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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$use_large_image = apply_filters( 'display_featured_image_genesis_use_large_image', array() );
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$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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$image_id = self::set_image_id();
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$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( $image_id, 'full' );
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$post = get_post();
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$item->content = strpos( $post->post_content, 'src="' . $fullsize[0] );
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if ( false !== $item->content ) {
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$source_id = '';
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$term_image = display_featured_image_genesis_get_term_image_id();
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$default_image = display_featured_image_genesis_get_default_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( $term_image ) ) {
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$source_id = $term_image;
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} elseif ( ! empty( $fallback ) ) {
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// else, reset backstretch image source to fallback.
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$source_id = $default_image;
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}
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$item->backstretch = wp_get_attachment_image_src( $source_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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// $title is set by new title function
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$title = self::set_item_title();
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/**
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* Optional filter to change the title text
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* @since 2.2.0
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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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* retrieve image ID for output
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* @param string $image_id variable, ID of featured image
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*
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* @since 2.2.1
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*/
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public static function set_image_id( $image_id = '' ) {
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$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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$postspage_image = get_post_thumbnail_id( $postspage );
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$fallback = $displaysetting['default'];
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$medium = (int) apply_filters( 'displayfeaturedimagegenesis_set_medium_width', get_option( 'medium_size_w' ) );
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$fallback_id = displayfeaturedimagegenesis_check_image_id( $fallback );
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/**
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* create a filter to use the fallback image
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* @var filter
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* @since 2.0.0 (deprecated old use_fallback_image function from 1.2.2)
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*/
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$use_fallback = apply_filters( 'display_featured_image_genesis_use_default', array() );
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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 = $fallback_id;
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if ( in_array( get_post_type(), $use_fallback ) ) {
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return (int) $image_id;
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}
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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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// also provisionally sets featured image for posts, similar to CPT archives
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if ( is_home() && 'page' === $frontpage && ! empty( $postspage_image ) ) {
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$image_id = $postspage_image;
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}
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// if a post type image exists, it takes priority over the fallback. check that next.
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$post_type = get_post_type();
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$displaysetting['post_type']['post'] = (int) $postspage_image;
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if ( ! empty( $displaysetting['post_type'][ $post_type ] ) ) {
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$image_id = displayfeaturedimagegenesis_check_image_id( $displaysetting['post_type'][ $post_type ] );
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/**
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* use the custom post type featured image
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*
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* @since 2.2.1
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*/
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$use_cpt = apply_filters( 'displayfeaturedimagegenesis_use_post_type_image', array() );
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if ( in_array( get_post_type(), $use_cpt ) ) {
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return (int) $image_id;
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}
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}
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if ( is_author() ) {
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$image_id = get_the_author_meta( 'displayfeaturedimagegenesis', (int) get_query_var( 'author' ) );
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}
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// taxonomy
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if ( is_category() || is_tag() || is_tax() ) {
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$term_id = $object->term_id;
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$term_meta = displayfeaturedimagegenesis_get_term_image( $term_id );
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if ( $term_meta ) {
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$image_id = $term_meta;
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}
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}
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// any singular post/page/CPT
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if ( is_singular() ) {
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$term_image = display_featured_image_genesis_get_term_image_id();
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if ( ! empty( $term_image ) ) {
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$image_id = $term_image;
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/**
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* create filter to use taxonomy image if single post doesn't have a thumbnail, but one of its terms does.
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* @var filter
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*/
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$use_tax_image = apply_filters( 'display_featured_image_genesis_use_taxonomy', array() );
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if ( in_array( get_post_type(), $use_tax_image ) ) {
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return (int) $image_id;
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}
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}
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$thumb_metadata = wp_get_attachment_metadata( get_post_thumbnail_id( get_the_ID() ) ); // needed only for the next line
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$width = $thumb_metadata ? $thumb_metadata['width'] : '';
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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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}
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/**
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* filter to use a different image id
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* @var $image_id
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*
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* @since 2.2.0
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*/
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$image_id = apply_filters( 'display_featured_image_genesis_image_id', $image_id );
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// make sure the image id is an integer
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$image_id = is_numeric( $image_id ) ? (int) $image_id : '';
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return $image_id;
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}
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protected static function set_item_title( $title = '' ) {
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$frontpage = get_option( 'show_on_front' ); // either 'posts' or 'page'
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$postspage = get_option( 'page_for_posts' );
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$a11ycheck = current_theme_supports( 'genesis-accessibility', array( 'headings' ) );
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if ( is_singular() ) {
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$title = get_the_title();
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} elseif ( is_home() && 'page' === $frontpage ) {
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$title = get_post( $postspage )->post_title;
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} elseif ( is_category() || is_tag() || is_tax() ) {
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$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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if ( empty( $title ) && $a11ycheck ) {
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$title = $term->name;
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}
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} elseif ( is_author() ) {
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$title = get_the_author_meta( 'headline', (int) get_query_var( 'author' ) );
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if ( empty( $title ) && $a11ycheck ) {
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$title = get_the_author_meta( 'display_name', (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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if ( empty( $title ) && $a11ycheck ) {
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$title = post_type_archive_title( '', false );
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}
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}
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return $title;
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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( $attachment_url = '' ) {
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$attachment_id = false;
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// as of 2.2.0, if a (new) image id is passed to the function, return it as is.
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if ( is_numeric( $attachment_url ) ) {
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return $attachment_url;
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}
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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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$base_url = wp_make_link_relative( $upload_dir_paths['baseurl'] );
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$attachment_url = wp_make_link_relative( $attachment_url );
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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, $base_url ) ) {
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// Remove the upload path base directory from the attachment URL
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$attachment_url = str_replace( $base_url . '/', '', $attachment_url );
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// If this is the URL of an auto-generated thumbnail, get the URL of the original image
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$url_stripped = preg_replace( '/-\d+x\d+(?=\.(jpg|jpeg|png|gif)$)/i', '', $attachment_url );
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// Finally, run a custom database query to get the attachment ID from the modified attachment URL
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$attachment_id = self::fetch_image_id_query( $url_stripped, $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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* Fetch image ID from database
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* @param var $url_stripped image url without WP resize string (eg 150x150)
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* @param var $attachment_url image url
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* @return int (image id) image ID, or false
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*
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* @since 2.2.0
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*
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* @author hellofromtonya
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*/
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protected static function fetch_image_id_query( $url_stripped, $attachment_url ) {
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global $wpdb;
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$query_sql = $wpdb->prepare(
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"
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SELECT wposts.ID
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FROM {$wpdb->posts} wposts, {$wpdb->postmeta} wpostmeta
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WHERE wposts.ID = wpostmeta.post_id AND wpostmeta.meta_key = '_wp_attached_file' AND wpostmeta.meta_value IN ( %s, %s ) AND wposts.post_type = 'attachment'
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",
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$url_stripped, $attachment_url
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);
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$result = $wpdb->get_col( $query_sql );
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return empty( $result ) || ! is_numeric( $result[0] ) ? false : intval( $result[0] );
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}
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/**
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* add a filter to change the minimum width required for backstretch image
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* @return integer sets the minimum width for backstretch effect
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*
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* @since 2.2.0
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*/
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public function minimum_backstretch_width() {
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$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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