messages: Refactor ListAppsResponse.Wire

shared/src/main/scala/cs214/webapp/Messages.scala

@@ -49,27 +49,24 @@ val SocketResponseWire = TryWire(IdentityWire)
 /** A response to the list-apps query */
 case class ListAppsResponse(apps: Seq[AppInfo])
 
+object AppInfoWire extends WireFormat[AppInfo]:
+  def encode(t: AppInfo): ujson.Value = t match
+    case AppInfo(id, name, description, year) =>
+      Obj("id" -> id, "name" -> name, "description" -> description, "year" -> year)
+  def decode(js: ujson.Value): Try[AppInfo] = Try:
+    AppInfo(
+      id = js("id").str,
+      name = js("name").str,
+      description = js("description").str,
+      year = js("year").num.toInt
+    )
+
 object ListAppsResponse:
   object Wire extends WireFormat[ListAppsResponse]:
     def encode(t: ListAppsResponse): ujson.Value =
-      ujson.Obj("apps" -> Arr(t.apps.map {
-        case AppInfo(id, name, description, year) =>
-          Obj("id" -> id, "name" -> name, "desc" -> description, "year" -> year)
-      }*))
+      Obj("apps" -> Arr(t.apps.map(AppInfoWire.encode)*))
     def decode(js: ujson.Value): Try[ListAppsResponse] = Try:
-      ListAppsResponse(
-        js("apps").arr
-          .map(_.obj)
-          .map(js =>
-            AppInfo(
-              id = js("id").str,
-              name = js("name").str,
-              description = js("desc").str,
-              year = js("year").num.toInt
-            )
-          )
-          .to(Seq)
-      )
+      ListAppsResponse(apps = js("apps").arr.map(AppInfoWire.decode(_).get).to(Seq))
 
 /** An HTTP request sent to create a new application instance for the server */
 case class CreateInstanceRequest(appName: String, userIds: Seq[UserId])