ADD Implement dynamic article linking and unlinking for 'revues' in revue.php to manage related articles effectively.

includes/revue.php

@@ -0,0 +1,67 @@
+<?php
+
+
+
+
+function dynamiques_revue_save_post($post_id)
+{
+	$current_revue_ID = $post_id;
+	$post_type = get_post_type($post_id);
+	if ($post_type !== 'revues') return;
+
+	// DE-LINK ARTICLES NOT USED IN THE ACF CHAPTER HANDLER IN REVUE POST ('articles' field)
+	dynamiques_revue_empty_unmapped_articles($current_revue_ID);
+	dynamiques_revue_link_mapped_articles($current_revue_ID);
+}
+add_action('acf/save_post', 'dynamiques_revue_save_post', 20);
+
+
+function dynamiques_revue_empty_unmapped_articles($current_revue_ID)
+{
+	$articles = get_field('articles', $current_revue_ID);
+
+	//  GET ALL ARTICLES RELATED TO THE REVUE AND CHECK IF THEY ARE HANDLED BY THE PARENT REVUE IN THE ARTICLE FIELD
+
+	$articles_related_to_revue = new WP_Query(array(
+		'post_type' => 'articles',
+		'meta_query' => array(
+			array(
+				'key' => 'related_revue',
+				'value' => $current_revue_ID,
+				'compare' => '=',
+			),
+		),
+	));
+
+	$articles_related_to_revue_posts = $articles_related_to_revue->posts;
+
+
+	$articles_related_to_revue_ids = array_map(function ($post) {
+		return $post->ID;
+	}, $articles_related_to_revue_posts);
+
+	$articles_ids = array_map(function ($article) {
+		return $article->ID;
+	}, $articles);
+
+	//  GET THE ARTICLES THAT ARE NOT HANDLED BY THE PARENT REVUE IN THE ARTICLE FIELD
+	$unmapped_articles_ids = array_diff($articles_related_to_revue_ids, $articles_ids);
+
+
+	//  EMPTY THE ARTICLE FIELD BECAUSE NOT USED BY THE PARENT REVUE
+
+	foreach ($unmapped_articles_ids as $article_id) {
+		update_field('related_revue', null, $article_id);
+	}
+}
+
+function dynamiques_revue_link_mapped_articles($current_revue_ID)
+{
+	$articles = get_field('articles', $current_revue_ID);
+
+	foreach ($articles as $article) {
+		$article_id = $article->ID;
+		$related_revue = get_field('related_revue', $article_id);
+		update_field('related_revue', $current_revue_ID, $article_id);
+	}
+}