Changeset View

Standalone View

				defmodule KolabChat.Rooms do
				use GenServer

				def get(roomId) do
				GenServer.call(__MODULE__, {:get, roomId})
				end

				def find(room) do
				GenServer.call(__MODULE__, {:find, room})
				end

				def set(roomId, room) do
				GenServer.call(__MODULE__, {:set, roomId, room})
				end

				def start_link do
				:ets.new(:rooms, [:set, :named_table, :public])
				GenServer.start_link(__MODULE__, :ok, name: __MODULE__)
				end

				def handle_call({:get, roomId}, _from, state) do
				room =
				case lookup_rooms(roomId) do
				nil -> nil
				room -> Map.put(room, :id, roomId)
				end

				{:reply, room, state}
				end

				# Finding a room by any attribute value, supported: id, name
				def handle_call({:find, room}, _from, state) do
				has_id = Map.has_key?(room, :id)
				room =
				case has_id and lookup_rooms(room.id) do
				# TODO: searching by name alias
				nil -> nil
				metadata -> Map.merge(room, metadata)
				end

				{:reply, room, state}
				end

				def handle_call({:set, roomId, metadata}, _from, state) do
				metadata = lookup_rooms(roomId, %{})
				\|> Map.merge(metadata)
				\|> Map.delete(:id)

				:ets.insert(:rooms, {roomId, metadata})
				{:reply, :ok, state}
				end

				defp lookup_rooms(roomId, default \\ nil) do
				case :ets.lookup(:rooms, roomId) do
				[{_, room}] -> room
				_ -> default
				end
				end
				end