Refactoring : sécurité (XSS), découpage en modules inc/* et js/admin/*, IDs résolus par slug, perf (caches, cron Gravatar, assets auto-hébergés), tests

inc/i18n.php

@@ -0,0 +1,120 @@
+<?php
+/**
+ * Multilingue maison (remplace Polylang).
+ *
+ * Détection de langue par préfixe /en/, champs bilingues "FR // EN",
+ * préfixage des URLs internes, traduction des noms de catégories,
+ * filtres Twig (|bilingual, |en_url, |cat_name) et sélecteur de langue.
+ */
+
+// ── Language detection (replaces Polylang) ───────────────────────
+define( 'THALIM_ORIGINAL_URI', $_SERVER['REQUEST_URI'] ?? '/' );
+
+function thalim_current_language(): string {
+    if ( isset( $GLOBALS['thalim_lang_override'] ) ) return $GLOBALS['thalim_lang_override'];
+    $uri = THALIM_ORIGINAL_URI;
+    return ( strpos( $uri, '/en/' ) === 0 || rtrim( $uri, '/' ) === '/en' ) ? 'en' : 'fr';
+}
+
+// Strip /en/ prefix before WordPress resolves the URL
+add_filter( 'do_parse_request', function ( $do_parse ) {
+    $uri = THALIM_ORIGINAL_URI;
+    if ( strpos( $uri, '/en/' ) === 0 ) {
+        $_SERVER['REQUEST_URI'] = substr( $uri, 3 );
+    } elseif ( rtrim( $uri, '/' ) === '/en' ) {
+        $_SERVER['REQUEST_URI'] = '/';
+    }
+    return $do_parse;
+}, 1 );
+
+// Prevent WP canonical redirect from overriding /en/ URLs
+add_filter( 'redirect_canonical', function ( $redirect ) {
+    if ( strpos( THALIM_ORIGINAL_URI, '/en/' ) === 0 ) return false;
+    return $redirect;
+}, 10, 2 );
+
+// Split "FR // EN" bilingual fields — returns the right part for the given lang
+function thalim_bilingual( string $value, string $lang = null ): string {
+    if ( $lang === null ) $lang = thalim_current_language();
+    if ( strpos( $value, ' // ' ) === false ) return $value;
+    $parts = explode( ' // ', $value, 2 );
+    return ( $lang === 'en' && trim( $parts[1] ?? '' ) !== '' ) ? trim( $parts[1] ) : trim( $parts[0] );
+}
+
+// Prepend /en to any internal URL when current language is EN.
+// Idempotent: safe to call multiple times on the same URL.
+function thalim_en_url( string $url ): string {
+    if ( thalim_current_language() !== 'en' ) return $url;
+    $home = rtrim( home_url(), '/' );
+    $path = substr( $url, strlen( $home ) );
+    if ( str_starts_with( $path, '/en/' ) || $path === '/en' ) return $url;
+    return $home . '/en' . $path;
+}
+
+// Auto-prefix all WP-generated internal URLs in EN mode.
+// Safe on admin: THALIM_ORIGINAL_URI starts with /wp-admin/ there,
+// so thalim_current_language() returns 'fr' and thalim_en_url() is a no-op.
+add_filter( 'term_link',      'thalim_en_url' ); // get_term_link(), get_category_link(), get_tag_link()
+add_filter( 'post_link',      'thalim_en_url' ); // get_permalink() on regular posts
+add_filter( 'page_link',      'thalim_en_url' ); // get_permalink() on pages
+add_filter( 'post_type_link', 'thalim_en_url' ); // get_permalink() on CPTs
+add_filter( 'author_link',    'thalim_en_url' ); // get_author_posts_url()
+
+// Return the translated category name if viewing in EN and titre_anglais is set.
+// Accepts a WP_Term, Timber\Term, term_id (int), or a name string + term_id.
+function thalim_cat_name( $cat, string $lang = null ): string {
+    if ( $lang === null ) $lang = thalim_current_language();
+    if ( is_object( $cat ) ) {
+        $term_id = $cat->term_id ?? ( $cat->id ?? 0 );
+        $fallback = $cat->name;
+    } elseif ( is_numeric( $cat ) ) {
+        $term_id = (int) $cat;
+        $term = get_term( $term_id, 'category' );
+        $fallback = $term && ! is_wp_error( $term ) ? $term->name : (string) $cat;
+    } else {
+        return (string) $cat;
+    }
+    if ( $lang !== 'en' ) return $fallback;
+    $en = get_term_meta( $term_id, 'titre_anglais', true );
+    return ( $en !== '' && $en !== false ) ? $en : $fallback;
+}
+
+// Register bilingual and en_url as Twig filters
+add_filter( 'timber/twig', function ( $twig ) {
+    $twig->addFilter( new \Twig\TwigFilter( 'bilingual', 'thalim_bilingual' ) );
+    $twig->addFilter( new \Twig\TwigFilter( 'en_url', 'thalim_en_url' ) );
+    $twig->addFilter( new \Twig\TwigFilter( 'cat_name', 'thalim_cat_name' ) );
+    return $twig;
+} );
+
+// Language switcher data (replaces pll_the_languages)
+// Output matches the structure header.twig expects: slug, url, current_lang
+function thalim_language_switcher(): array {
+    $uri   = THALIM_ORIGINAL_URI;
+    $path  = parse_url( $uri, PHP_URL_PATH ) ?? '/';
+    $query = ( $q = parse_url( $uri, PHP_URL_QUERY ) ) ? '?' . $q : '';
+    $is_en = thalim_current_language() === 'en';
+
+    $fr_path = $is_en ? ( substr( $path, 3 ) ?: '/' ) : $path;
+    $en_path = $is_en ? $path : '/en' . $path;
+
+    return [
+        'fr' => [ 'slug' => 'fr', 'url' => home_url( $fr_path ) . $query, 'current_lang' => ! $is_en ],
+        'en' => [ 'slug' => 'en', 'url' => home_url( $en_path ) . $query, 'current_lang' => $is_en ],
+    ];
+}
+
+// Apply bilingual split to the browser tab title + translate category names
+add_filter('document_title_parts', function ($title_parts) {
+    if (!empty($title_parts['title'])) {
+        $title_parts['title'] = thalim_bilingual($title_parts['title']);
+        // On category archives, replace the title with the translated category name
+        if ( is_category() ) {
+            $cat = get_queried_object();
+            if ( $cat ) {
+                $title_parts['title'] = thalim_cat_name( $cat );
+            }
+        }
+    }
+    return $title_parts;
+});