elixir-in-action/chapter7/todo_cache/lib/todo/server.ex

48 lines
1 KiB
Elixir

defmodule Todo.Server do
use GenServer
def start do
GenServer.start(__MODULE__, nil)
end
def add_entry(pid, entry) do
GenServer.cast(pid, {:add_entry, entry})
end
def delete_entry(pid, entry_id) do
GenServer.cast(pid, {:delete_entry, entry_id})
end
def update_entry(pid, entry_id, updater_fun) do
GenServer.cast(pid, {:update_entry, entry_id, updater_fun})
end
def entries(pid, date) do
GenServer.call(pid, {:entries, date})
end
@impl true
def init(_) do
{:ok, Todo.List.new()}
end
@impl true
def handle_cast({:add_entry, entry}, state) do
{:noreply, Todo.List.add_entry(state, entry)}
end
@impl true
def handle_cast({:delete_entry, entry_id}, state) do
{:noreply, Todo.List.delete_entry(state, entry_id)}
end
@impl true
def handle_cast({:update_entry, entry_id, updater_fun}, state) do
{:noreply, Todo.List.update_entry(state, entry_id, updater_fun)}
end
@impl true
def handle_call({:entries, date}, _, state) do
{:reply, Todo.List.entries(state, date), state}
end
end