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399<?php
/**
* Shared URL-fetching logic used by both the public feed and admin page.
*
* @package Equalify_Wp_Integration
* @subpackage Equalify_Wp_Integration/includes
*/
class Equalify_Wp_Integration_URLs {
// -------------------------------------------------------------------------
// Cache helpers
// -------------------------------------------------------------------------
/**
* Returns true only when a real external object cache is active.
* The default WordPress DB-backed cache is not reliable enough to cache
* query results, so we skip it entirely on environments without one.
*/
private static function using_cache(): bool {
return (bool) wp_using_ext_object_cache();
}
/**
* Returns the current cache generation counter for this site, initialising
* it to 1 if absent. All data cache keys embed this value, so a single
* wp_cache_incr (see flush_cache) instantly invalidates every cached entry
* without needing to track individual keys.
*
* The key is scoped to the current blog ID so each subsite in a multisite
* network maintains its own independent generation.
*/
private static function cache_gen(): int {
$key = 'equalify_urls_' . get_current_blog_id();
$gen = wp_cache_get( $key, 'equalify' );
if ( false === $gen ) {
wp_cache_add( $key, 1, 'equalify' );
return 1;
}
return (int) $gen;
}
/**
* Bumps the generation counter, effectively invalidating all cached URL data
* for the current site. Called whenever posts change or the include_pdfs
* option changes.
*/
public static function flush_cache(): void {
if ( self::using_cache() ) {
wp_cache_incr( 'equalify_urls_' . get_current_blog_id(), 1, 'equalify' );
}
}
// -------------------------------------------------------------------------
// Public API
// -------------------------------------------------------------------------
/**
* Returns one page of URLs for the admin table, plus counts for the heading and pagination.
* Uses DB-level pagination to avoid loading all posts into memory.
*
* Posts and PDFs are treated as a single ordered list (HTML first, PDFs after).
* The offset math splits the page window across the two query types as needed.
*
* @param bool $include_pdfs
* @param int $per_page
* @param int $current_page 1-based, unclamped (out-of-range returns empty urls with correct totals).
* @param string $search URL substring to filter by. HTML posts match on post_name; PDFs match on guid.
* @return array { urls: array, total: int, total_all: int }
*/
public static function get_paged( $include_pdfs, $per_page, $current_page, $search = '' ) {
if ( self::using_cache() ) {
$cache_key = 'paged_' . self::cache_gen() . '_' . md5( serialize( [ $include_pdfs, $per_page, $current_page, $search ] ) );
$cached = wp_cache_get( $cache_key, 'equalify' );
if ( false !== $cached ) {
return $cached;
}
}
$post_types = self::html_post_types();
$post_total = self::count_html( $post_types, $search );
$pdf_total = $include_pdfs ? self::count_pdfs( $search ) : 0;
$total = $post_total + $pdf_total;
$total_all = ( $search !== '' )
? self::count_html( $post_types, '' ) + ( $include_pdfs ? self::count_pdfs( '' ) : 0 )
: $total;
$offset = ( $current_page - 1 ) * $per_page;
$remaining = $per_page;
$pdf_offset = 0;
$urls = [];
// Fetch from HTML posts if the window overlaps the post range.
if ( $offset < $post_total && $remaining > 0 ) {
$to_fetch = min( $remaining, $post_total - $offset );
$urls = self::fetch_html( $post_types, $offset, $to_fetch, $search );
$remaining -= count( $urls );
// $pdf_offset stays 0: we start PDFs from the beginning on this page.
} elseif ( $offset >= $post_total ) {
// Window is entirely within the PDF range.
$pdf_offset = $offset - $post_total;
}
// Fetch PDFs to fill the rest of the page.
if ( $include_pdfs && $remaining > 0 && $pdf_total > $pdf_offset ) {
$urls = array_merge( $urls, self::fetch_pdfs( $pdf_offset, $remaining, $search ) );
}
$result = compact( 'urls', 'total', 'total_all' );
if ( self::using_cache() ) {
wp_cache_set( $cache_key, $result, 'equalify', 300 );
}
return $result;
}
/**
* Iterates all URLs in chunks and calls $callback for each one.
* Keeps memory usage flat regardless of site size.
* For use in the CSV endpoint.
*
* @param bool $include_pdfs
* @param callable $callback Receives each ['url' => ..., 'type' => ...] item.
*/
public static function stream_all( $include_pdfs, callable $callback ) {
$post_types = self::html_post_types();
$chunk_size = 200;
$use_cache = self::using_cache();
$gen = $use_cache ? self::cache_gen() : 0;
// Stream HTML posts.
$page = 1;
do {
$chunk_key = 'stream_html_' . $gen . '_' . $page;
$chunk = $use_cache ? wp_cache_get( $chunk_key, 'equalify' ) : false;
if ( false === $chunk ) {
$query = new WP_Query( [
'post_type' => $post_types,
'post_status' => 'publish',
'posts_per_page' => $chunk_size,
'paged' => $page,
'no_found_rows' => true,
'orderby' => 'ID',
'order' => 'ASC',
] );
$chunk = [];
foreach ( $query->posts as $post ) {
$permalink = get_permalink( $post->ID );
if ( $permalink ) {
$chunk[] = [ 'post_id' => $post->ID, 'url' => $permalink, 'type' => 'html' ];
}
}
wp_reset_postdata();
if ( $use_cache ) {
wp_cache_set( $chunk_key, $chunk, 'equalify', 300 );
}
}
foreach ( $chunk as $item ) {
$callback( $item );
}
$page++;
} while ( count( $chunk ) === $chunk_size );
if ( ! $include_pdfs ) {
return;
}
// Stream PDF attachments.
$page = 1;
do {
$chunk_key = 'stream_pdf_' . $gen . '_' . $page;
$chunk = $use_cache ? wp_cache_get( $chunk_key, 'equalify' ) : false;
if ( false === $chunk ) {
$query = new WP_Query( [
'post_type' => 'attachment',
'post_status' => 'inherit',
'post_mime_type' => 'application/pdf',
'posts_per_page' => $chunk_size,
'paged' => $page,
'no_found_rows' => true,
'orderby' => 'ID',
'order' => 'ASC',
] );
$chunk = [];
foreach ( $query->posts as $post ) {
$file_url = wp_get_attachment_url( $post->ID );
if ( $file_url ) {
$chunk[] = [ 'post_id' => $post->ID, 'url' => $file_url, 'type' => 'pdf' ];
}
}
wp_reset_postdata();
if ( $use_cache ) {
wp_cache_set( $chunk_key, $chunk, 'equalify', 300 );
}
}
foreach ( $chunk as $item ) {
$callback( $item );
}
$page++;
} while ( count( $chunk ) === $chunk_size );
}
// -------------------------------------------------------------------------
// Private helpers
// -------------------------------------------------------------------------
private static function html_post_types() {
return array_values(
array_diff( get_post_types( [ 'public' => true ] ), [ 'attachment' ] )
);
}
/**
* Counts published HTML posts, optionally filtered by post_name LIKE search.
*/
private static function count_html( $post_types, $search ) {
$args = [
'post_type' => $post_types,
'post_status' => 'publish',
'posts_per_page' => 1,
'fields' => 'ids',
'no_found_rows' => false,
];
$filter = null;
if ( $search !== '' ) {
$args['_equalify_search'] = $search;
$filter = self::make_name_like_filter();
add_filter( 'posts_where', $filter, 10, 2 );
}
$q = new WP_Query( $args );
if ( $filter ) {
remove_filter( 'posts_where', $filter, 10 );
}
return (int) $q->found_posts;
}
/**
* Counts PDF attachments, optionally filtered by guid LIKE search.
*/
private static function count_pdfs( $search ) {
$args = [
'post_type' => 'attachment',
'post_status' => 'inherit',
'post_mime_type' => 'application/pdf',
'posts_per_page' => 1,
'fields' => 'ids',
'no_found_rows' => false,
];
$filter = null;
if ( $search !== '' ) {
$args['_equalify_search'] = $search;
$filter = self::make_guid_like_filter();
add_filter( 'posts_where', $filter, 10, 2 );
}
$q = new WP_Query( $args );
if ( $filter ) {
remove_filter( 'posts_where', $filter, 10 );
}
return (int) $q->found_posts;
}
/**
* Fetches a slice of published HTML posts by raw DB offset.
*/
private static function fetch_html( $post_types, $offset, $limit, $search ) {
$args = [
'post_type' => $post_types,
'post_status' => 'publish',
'posts_per_page' => $limit,
'offset' => $offset,
'no_found_rows' => true,
'orderby' => 'post_type',
'order' => 'ASC',
];
$filter = null;
if ( $search !== '' ) {
$args['_equalify_search'] = $search;
$filter = self::make_name_like_filter();
add_filter( 'posts_where', $filter, 10, 2 );
}
$query = new WP_Query( $args );
if ( $filter ) {
remove_filter( 'posts_where', $filter, 10 );
}
$urls = [];
foreach ( $query->posts as $post ) {
$permalink = get_permalink( $post->ID );
if ( $permalink ) {
$urls[] = [ 'post_id' => $post->ID, 'url' => $permalink, 'type' => 'html' ];
}
}
wp_reset_postdata();
return $urls;
}
/**
* Fetches a slice of PDF attachments by raw DB offset.
*/
private static function fetch_pdfs( $offset, $limit, $search ) {
$args = [
'post_type' => 'attachment',
'post_status' => 'inherit',
'post_mime_type' => 'application/pdf',
'posts_per_page' => $limit,
'offset' => $offset,
'no_found_rows' => true,
'orderby' => 'ID',
'order' => 'ASC',
];
$filter = null;
if ( $search !== '' ) {
$args['_equalify_search'] = $search;
$filter = self::make_guid_like_filter();
add_filter( 'posts_where', $filter, 10, 2 );
}
$query = new WP_Query( $args );
if ( $filter ) {
remove_filter( 'posts_where', $filter, 10 );
}
$urls = [];
foreach ( $query->posts as $post ) {
$file_url = wp_get_attachment_url( $post->ID );
if ( $file_url ) {
$urls[] = [ 'post_id' => $post->ID, 'url' => $file_url, 'type' => 'pdf' ];
}
}
wp_reset_postdata();
return $urls;
}
/**
* Returns a posts_where closure that constrains results to post_name LIKE %search%.
* Reads the search term from the '_equalify_search' WP_Query arg.
*/
private static function make_name_like_filter() {
return function ( $where, $query ) {
$s = $query->get( '_equalify_search' );
if ( $s ) {
global $wpdb;
$where .= $wpdb->prepare(
" AND {$wpdb->posts}.post_name LIKE %s",
'%' . $wpdb->esc_like( $s ) . '%'
);
}
return $where;
};
}
/**
* Returns a posts_where closure that constrains results to guid LIKE %search%.
* Reads the search term from the '_equalify_search' WP_Query arg.
*/
private static function make_guid_like_filter() {
return function ( $where, $query ) {
$s = $query->get( '_equalify_search' );
if ( $s ) {
global $wpdb;
$where .= $wpdb->prepare(
" AND {$wpdb->posts}.guid LIKE %s",
'%' . $wpdb->esc_like( $s ) . '%'
);
}
return $where;
};
}
}