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Redux.ex (elixir)
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| defmodule Redux do | |
| @moduledoc """ | |
| Like redux.js, but more elixir-like | |
| store = create_store fn state, action -> ... end | |
| store |> get_state() | |
| store |> dispatch(%{ type: "publish" }) | |
| """ | |
| defstruct reducer: nil, state: nil | |
| @doc """ | |
| Creates a store | |
| """ | |
| def create_store(reducer, initial_state \\ nil) do | |
| %Redux{reducer: reducer, state: initial_state} | |
| |> dispatch(%{ type: :"@@redux/INIT" }) | |
| end | |
| @doc """ | |
| Returns the current state | |
| """ | |
| def get_state(store) do | |
| store.state | |
| end | |
| @doc """ | |
| Dispatches an action | |
| """ | |
| def dispatch(store, action) do | |
| store | |
| |> Map.put(:state, store.reducer.(get_state(store), action)) | |
| end | |
| end |
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| defmodule Example do | |
| import Redux | |
| def reducer(state, action) do | |
| case action.type do | |
| "set" -> | |
| action.value | |
| "add" -> | |
| state + action.value | |
| _ -> | |
| state | |
| end | |
| end | |
| def run do | |
| store = create_store(&reducer/2) | |
| store = store |> dispatch(%{ type: "set", value: 2 }) | |
| IO.puts(store |> get_state()) #=> 2 | |
| store = dispatch(store, %{ type: "add", value: 10 }) | |
| IO.puts(store |> get_state()) #=> 12 | |
| end | |
| end | |
| Example.run |
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