feat: add the ability to resync props

crates/chattyness-db/src/queries/props.rs

@@ -164,6 +164,99 @@ pub async fn create_server_prop<'e>(
     Ok(prop)
 }
 
+/// Upsert a server prop (insert or update on slug conflict).
+///
+/// If a prop with the same slug already exists, it will be updated.
+/// Otherwise, a new prop will be created.
+pub async fn upsert_server_prop<'e>(
+    executor: impl PgExecutor<'e>,
+    req: &CreateServerPropRequest,
+    asset_path: &str,
+    created_by: Option<Uuid>,
+) -> Result<ServerProp, AppError> {
+    let slug = req.slug_or_generate();
+
+    // Positioning: either content layer OR emotion layer OR neither (all NULL)
+    // Database constraint enforces mutual exclusivity
+    let (default_layer, default_emotion, default_position) =
+        if req.default_layer.is_some() {
+            // Content layer prop
+            (
+                req.default_layer.map(|l| l.to_string()),
+                None,
+                Some(req.default_position.unwrap_or(4)), // Default to center position
+            )
+        } else if req.default_emotion.is_some() {
+            // Emotion layer prop
+            (
+                None,
+                req.default_emotion.map(|e| e.to_string()),
+                Some(req.default_position.unwrap_or(4)), // Default to center position
+            )
+        } else {
+            // Non-avatar prop
+            (None, None, None)
+        };
+
+    let prop = sqlx::query_as::<_, ServerProp>(
+        r#"
+        INSERT INTO server.props (
+            name, slug, description, tags, asset_path,
+            default_layer, default_emotion, default_position,
+            created_by
+        )
+        VALUES (
+            $1, $2, $3, $4, $5,
+            $6::props.avatar_layer, $7::props.emotion_state, $8,
+            $9
+        )
+        ON CONFLICT (slug) DO UPDATE SET
+            name = EXCLUDED.name,
+            description = EXCLUDED.description,
+            tags = EXCLUDED.tags,
+            asset_path = EXCLUDED.asset_path,
+            default_layer = EXCLUDED.default_layer,
+            default_emotion = EXCLUDED.default_emotion,
+            default_position = EXCLUDED.default_position,
+            updated_at = now()
+        RETURNING
+            id,
+            name,
+            slug,
+            description,
+            tags,
+            asset_path,
+            thumbnail_path,
+            default_layer,
+            default_emotion,
+            default_position,
+            is_unique,
+            is_transferable,
+            is_portable,
+            is_droppable,
+            is_active,
+            available_from,
+            available_until,
+            created_by,
+            created_at,
+            updated_at
+        "#,
+    )
+    .bind(&req.name)
+    .bind(&slug)
+    .bind(&req.description)
+    .bind(&req.tags)
+    .bind(asset_path)
+    .bind(&default_layer)
+    .bind(&default_emotion)
+    .bind(default_position)
+    .bind(created_by)
+    .fetch_one(executor)
+    .await?;
+
+    Ok(prop)
+}
+
 /// Delete a server prop.
 pub async fn delete_server_prop<'e>(
     executor: impl PgExecutor<'e>,