Oops, fix list caching when removing items via Impress 2020

I realized this months ago when adding `updated_at` changes to the
other actions around here, and I just forgot this one, and I've had a
sticky on my desk about it since then! Finally done!

Before this change, clicking "I own this" or "I want this" on the item
page, while you own/want the item and it's in a specific list, would
remove the item from the list but *not* update the list's `updated_at`
timestamp. Now, it does!

This affects caching on main DTI, which relies on the list's
`updated_at` to decide when to render new HTML.

src/server/types/Item.js

@@ -1018,12 +1018,45 @@ const resolvers = {
         return null;
       }
 
-      await db.query(
+      const connection = await db.getConnection();
+      try {
+        // Get the relevant lists this is currently in.
+        await connection.beginTransaction();
+        const [rows] = await connection.query(
+          `SELECT DISTINCT list_id FROM closet_hangers
+           WHERE item_id = ? AND user_id = ? AND owned = ? AND
+                 list_id IS NOT NULL`,
+          [itemId, currentUserId, true],
+        );
+
+        // Mark all these lists as updated.
+        const listIds = rows.map((row) => row.list_id);
+        const qs = listIds.map((_) => "?");
+        const now = new Date();
+        await connection.query(
+          `UPDATE closet_lists SET updated_at = ? WHERE id IN (${qs})`,
+          [now, ...listIds],
+        );
+
+        // Delete all these hangers. (NOTE: This includes ones not in a list!)
+        await connection.query(
           `DELETE FROM closet_hangers
            WHERE item_id = ? AND user_id = ? AND owned = ?;`,
           [itemId, currentUserId, true],
         );
 
+        await connection.commit();
+      } catch (error) {
+        try {
+          await connection.rollback();
+        } catch (error2) {
+          console.warn(`Error rolling back transaction`, error2);
+        }
+        throw error;
+      } finally {
+        await connection.release();
+      }
+
       return { id: itemId };
     },
     addToItemsCurrentUserWants: async (
@@ -1083,12 +1116,45 @@ const resolvers = {
         return null;
       }
 
-      await db.query(
+      const connection = await db.getConnection();
+      try {
+        // Get the relevant lists this is currently in.
+        await connection.beginTransaction();
+        const [rows] = await connection.query(
+          `SELECT DISTINCT list_id FROM closet_hangers
+           WHERE item_id = ? AND user_id = ? AND owned = ? AND
+                 list_id IS NOT NULL`,
+          [itemId, currentUserId, false],
+        );
+
+        // Mark all these lists as updated.
+        const listIds = rows.map((row) => row.list_id);
+        const qs = listIds.map((_) => "?");
+        const now = new Date();
+        await connection.query(
+          `UPDATE closet_lists SET updated_at = ? WHERE id IN (${qs})`,
+          [now, ...listIds],
+        );
+
+        // Delete all these hangers. (NOTE: This includes ones not in a list!)
+        await connection.query(
           `DELETE FROM closet_hangers
            WHERE item_id = ? AND user_id = ? AND owned = ?;`,
           [itemId, currentUserId, false],
         );
 
+        await connection.commit();
+      } catch (error) {
+        try {
+          await connection.rollback();
+        } catch (error2) {
+          console.warn(`Error rolling back transaction`, error2);
+        }
+        throw error;
+      } finally {
+        await connection.release();
+      }
+
       return { id: itemId };
     },
     addItemToClosetList: async (