add gs

RCCService2020/ExtraContent/LuaPackages/AppTempCommon/LuaApp/Reducers/Friends.lua

@@ -0,0 +1,43 @@
+local CorePackages = game:GetService("CorePackages")
+
+local Immutable = require(CorePackages.AppTempCommon.Common.Immutable)
+local RetrievalStatus = require(CorePackages.AppTempCommon.LuaApp.Enum.RetrievalStatus)
+
+local FetchUserFriendsStarted = require(CorePackages.AppTempCommon.LuaApp.Actions.FetchUserFriendsStarted)
+local FetchUserFriendsFailed = require(CorePackages.AppTempCommon.LuaApp.Actions.FetchUserFriendsFailed)
+local FetchUserFriendsCompleted = require(CorePackages.AppTempCommon.LuaApp.Actions.FetchUserFriendsCompleted)
+
+local function setFieldPerUser(state, fieldName, userId, value)
+	local field = state[fieldName] or {}
+	return Immutable.JoinDictionaries(state, {
+		[fieldName] = Immutable.JoinDictionaries(field, {
+			[userId] = value
+		})
+	})
+end
+
+local function setRetrievalStatus(state, userId, status)
+	return setFieldPerUser(state, "retrievalStatus", userId, status)
+end
+
+local function setRetrievalFailureResponse(state, userId, response)
+	return setFieldPerUser(state, "retrievalFailureResponse", userId, response)
+end
+
+return function(state, action)
+	state = state or {
+		retrievalStatus = {},
+		retrievalFailureResponse = {},
+	}
+
+	if action.type == FetchUserFriendsStarted.name then
+		state = setRetrievalStatus(state, action.userId, RetrievalStatus.Fetching)
+	elseif action.type == FetchUserFriendsFailed.name then
+		state = setRetrievalStatus(state, action.userId, RetrievalStatus.Failed)
+		state = setRetrievalFailureResponse(state, action.userId, action.response)
+	elseif action.type == FetchUserFriendsCompleted.name then
+		state = setRetrievalStatus(state, action.userId, RetrievalStatus.Done)
+	end
+
+	return state
+end