diff --git a/models/Movie.php b/models/Movie.php
index 323c3bb..b25f5ee 100644
--- a/models/Movie.php
+++ b/models/Movie.php
@@ -10,10 +10,31 @@ class Movie {
     }
 
     public function add($userId, $tmdbId, $title, $poster, $type) {
+        // 1. On insère le film
         $stmt = $this->db->prepare("INSERT INTO movies (user_id, tmdb_id, title, poster_path, media_type, is_common) VALUES (?, ?, ?, ?, ?, 0)");
-        return $stmt->execute([$userId, $tmdbId, $title, $poster, $type]);
+        $stmt->execute([$userId, $tmdbId, $title, $poster, $type]);
+        
+        // 2. On récupère l'ID du partenaire (supposons que tu as une table 'users' avec un champ 'partner_id')
+        $stmt = $this->db->prepare("SELECT partner_id FROM users WHERE id = ?");
+        $stmt->execute([$userId]);
+        $partnerId = $stmt->fetchColumn();
+
+        // 3. Si un partenaire existe, on cherche s'il a déjà ce film
+        if ($partnerId) {
+            $stmt = $this->db->prepare("SELECT id FROM movies WHERE user_id = ? AND tmdb_id = ? AND is_common = 0");
+            $stmt->execute([$partnerId, $tmdbId]);
+            $partnerMovie = $stmt->fetch();
+
+            // 4. Si le partenaire a le film, on bascule les DEUX en "common"
+            if ($partnerMovie) {
+                $stmt = $this->db->prepare("UPDATE movies SET is_common = 1 WHERE tmdb_id = ? AND (user_id = ? OR user_id = ?)");
+                $stmt->execute([$tmdbId, $userId, $partnerId]);
+            }
     }
 
+    return true;
+}
+
     public function share($movieId, $userId) {
         $stmt = $this->db->prepare("UPDATE movies SET is_common = 1 WHERE id = ? AND user_id = ?");
         return $stmt->execute([$movieId, $userId]);