feat(getCore/client): load and extend player class

imports/getCore/es_extended/client.lua

@@ -1,5 +1,40 @@
+if not lib.player then lib.player() end
+
 return function(resource)
 	local ESX = exports[resource]:getSharedObject()
-	-- Eventually add some functions here to simplify the creation of framework-agnostic resources.
+
+	RegisterNetEvent('esx:playerLoaded', function(xPlayer)
+		ESX.PlayerData = xPlayer
+	end)
+
+	RegisterNetEvent('esx:setJob', function(job)
+		ESX.PlayerData.job = job
+	end)
+
+	lib.addPlayerMethod('hasGroup', function(self, filter)
+		local type = type(filter)
+
+		if type == 'string' then
+			return ESX.PlayerData.job.name == filter
+		end
+
+		local tabletype = table.type(filter)
+
+		if tabletype == 'hash' then
+			local grade = filter[ESX.PlayerData.job.name]
+			return grade and grade <= ESX.PlayerData.job.grade
+		end
+
+		if tabletype == 'array' then
+			for i = 1, #filter do
+				if ESX.PlayerData.job.name == filter[i] then
+					return true
+				end
+			end
+
+			return false
+		end
+	end)
+
 	return ESX
 end