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PlatformContent/pc/scripts/ui/Modules/GameJoin.lua

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+--[[
+			// GameJoin.lua
+
+			// Handles game join logic
+]]
+local CoreGui = Game:GetService("CoreGui")
+local GuiRoot = CoreGui:FindFirstChild("RobloxGui")
+local Modules = GuiRoot:FindFirstChild("Modules")
+local PlatformService = nil
+pcall(function() PlatformService = game:GetService('PlatformService') end)
+
+local Errors = require(Modules:FindFirstChild('Errors'))
+local ErrorOverlayModule = require(Modules:FindFirstChild('ErrorOverlay'))
+local ScreenManager = require(Modules:FindFirstChild('ScreenManager'))
+local UserData = require(Modules:FindFirstChild('UserData'))
+
+local GameJoin = {}
+
+GameJoin.JoinType = {
+	Normal = 0;			-- use placeId
+	GameInstance = 1;	-- use game instance id
+	Follow = 2;			-- use userId or user you are following
+	PMPCreator = 3;		-- use placeId, used when a player joins their own place
+}
+
+-- joinType - GameJoin.JoinType
+-- joinId - can be a userId or placeId, see JoinType for which one to use
+function GameJoin:StartGame(joinType, joinId, creatorUserId)
+	if UserSettings().GameSettings:InStudioMode() then
+		ScreenManager:OpenScreen(ErrorOverlayModule(Errors.Test.CannotJoinGame), false)
+	else
+		local success, result = pcall(function()
+			-- check if we are the creator for normal joins
+			if joinType == self.JoinType.Normal and creatorUserId == UserData:GetRbxUserId() then
+				joinType = self.JoinType.PMPCreator
+			end
+
+			return PlatformService:BeginStartGame3(joinType, joinId)
+		end)
+		-- catch pcall error, something went wrong with call into API
+		-- all other game join errors are caught in AppHome.lua
+		if not success then
+			ScreenManager:OpenScreen(ErrorOverlayModule(Errors.GameJoin[#Errors.GameJoin]), false)
+		end
+	end
+end
+
+return GameJoin