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perspective

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An event sourcing library based upon asynchronously generated perspectives

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perspective lib core todo todo.ex
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lib/core/todo/todo.ex 

defmodule Core.ToDo do

  use Perspective.DomainNode



  defstruct id: "", name: "", completed: false



  def apply_event(_todo, %Core.ToDoAdded{} = event) do

    %Core.ToDo{}

    |> Map.put(:id, event.id)

    |> Map.put(:name, event.name)

    |> case do

      new_todo -> {:ok, new_todo}

    end

  end



  def apply_event(todo, %Core.ToDoRenamed{} = event) do

    todo

    |> Map.put(:name, event.name)

    |> case do

      updated_todo -> {:ok, updated_todo}

    end

  end



  def apply_event(todo, %Core.ToDoCompleted{} = _event) do

    todo

    |> Map.put(:completed, true)

    |> case do

      completed_todo -> {:ok, completed_todo}

    end

  end

end