Oops, touch list updated_at when adding/removing items

Oh right, I forgot that 2020 has endpoints to add/remove items from
lists, so I didn't add logic that corresponds to the `touch: true` we
recently added in the Rails app to power caching!

This created a bug where adding/removing items from lists from the item
page would _not_ cause the cache to update in the Rails app when
sharing your list with others.

In this change, we add `UPDATE` queries to emulate that same logic!

src/server/types/Item.js

@@ -1138,6 +1138,14 @@ const resolvers = {
           [itemId, userId, ownsOrWantsItems === "OWNS", listId, 1, now, now],
         );
 
+        // Finally, touch the `updated_at` timestamp for the list.
+        await connection.query(
+          `
+            UPDATE closet_lists SET updated_at = ? WHERE id = ? LIMIT 1;
+          `,
+          [now, listId],
+        );
+
         await connection.commit();
       } catch (error) {
         try {
@@ -1182,6 +1190,9 @@ const resolvers = {
       const connection = await db.getConnection();
       try {
         await connection.beginTransaction();
+        const now = new Date();
+
+        // First, remove the hanger from the list.
         await connection.query(
           `
             DELETE FROM closet_hangers
@@ -1190,6 +1201,16 @@ const resolvers = {
           [...listMatcherValues, itemId],
         );
 
+        // Then, touch the `updated_at` timestamp for the list.
+        if (!closetListRef.isDefaultList) {
+          await connection.query(
+            `
+              UPDATE closet_lists SET updated_at = ? WHERE id = ? LIMIT 1;
+            `,
+            [now, closetListRef.id],
+          );
+        }
+
         if (ensureInSomeList) {
           // If requested, we check whether the item is still in *some* list of
           // the same own/want type. If not, we add it to the default list.
@@ -1202,7 +1223,6 @@ const resolvers = {
           );
 
           if (rows[0].count === 0) {
-            const now = new Date();
             await connection.query(
               `
                 INSERT INTO closet_hangers
@@ -1221,6 +1241,8 @@ const resolvers = {
         } catch (error) {
           console.warn(`Error rolling back transaction`, error);
         }
+
+        throw error;
       } finally {
         await connection.release();
       }