FEATURE introducing component

includes/article.php

@@ -0,0 +1,57 @@
+<?php
+
+
+function dynamiques_article_save_post($post_id)
+{
+	$current_article_ID = $post_id;
+	$post_type = get_post_type($post_id);
+	if ($current_article_ID && $post_type !== 'articles') return;
+
+	$related_revue_ID = get_field('related_revue', $current_article_ID);
+
+	dynamiques_article_remove_articles_from_all_revues($current_article_ID);
+
+	if ($related_revue_ID && is_numeric($related_revue_ID) && $related_revue_ID !== '') {
+		dynamiques_article_include_article_in_revue_articles_array($current_article_ID, $related_revue_ID);
+	}
+}
+add_action('acf/save_post', 'dynamiques_article_save_post', 20);
+
+
+function dynamiques_article_include_article_in_revue_articles_array($current_article_ID, $related_revue_ID)
+{
+	$current_article = get_post($current_article_ID);
+	$related_revues_articles = get_field('articles', $related_revue_ID);
+	if (!is_array($related_revues_articles)) {
+		$related_revues_articles = [];
+	}
+	$related_revues_articles[] = $current_article;
+
+
+	update_field('articles', $related_revues_articles, $related_revue_ID);
+}
+
+
+function dynamiques_article_remove_articles_from_all_revues($current_article_ID)
+{
+	$revues_containing_article = new WP_Query(array(
+		'post_type' => 'revues',
+		'meta_query' => array(
+			array(
+				'key' => 'articles',
+				'value' => '"' . $current_article_ID . '"',
+				'compare' => 'LIKE',
+			),
+		),
+	));
+
+	foreach ($revues_containing_article->posts as $revue) {
+		$revue_ID = $revue->ID;
+		$revue_articles = get_field('articles', $revue_ID);
+
+		$revue_articles = array_filter($revue_articles, function ($article) use ($current_article_ID) {
+			return (is_object($article) && isset($article->ID)) ? $article->ID != $current_article_ID : $article != $current_article_ID;
+		});
+		update_field('articles', $revue_articles, $revue_ID);
+	}
+}