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Remote controlled frontend framework for Phoenix.
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lib/drab/drab_module.ex
defmodule DrabModule do
# TODO: docs, describe how to write own drab module
@moduledoc false
# Drab behaviour
# All Drab Modules must provide a list of prerequisite modules (except Drab.Core, which is loaded
# by defaut),
# as well as the list of the Javascripts to render
@callback prerequisites() :: list
@callback js_templates() :: list
@callback transform_payload(payload :: map, state :: Drab.t()) :: map
@callback transform_socket(socket :: Phoenix.Socket.t(), payload :: map, state :: Drab.t()) ::
map
defmacro __using__(_opts) do
quote do
@behaviour DrabModule
@impl true
def prerequisites(), do: []
@impl true
def js_templates(), do: []
@impl true
def transform_payload(payload, _state), do: payload
@impl true
def transform_socket(socket, _payload, _state), do: socket
defoverridable prerequisites: 0, js_templates: 0, transform_payload: 2, transform_socket: 3
end
end
@doc false
@spec all_modules_for(list) :: list
def all_modules_for(modules) do
modules = modules |> prereqs_for() |> List.flatten() |> Enum.reverse()
Enum.uniq(modules ++ [Drab.Core])
end
@doc false
@spec all_templates_for(list) :: list
def all_templates_for(modules) do
modules
|> all_modules_for()
|> Enum.map(fn mod -> mod.js_templates end)
|> List.flatten()
|> Enum.uniq()
end
@spec prereqs_for(atom | list) :: list
defp prereqs_for(module) when is_atom(module) do
[module | prereqs_for(module.prerequisites())]
end
defp prereqs_for(modules) when is_list(modules) do
Enum.map(modules, &prereqs_for/1)
end
end