122 lines
3.1 KiB
Elixir
122 lines
3.1 KiB
Elixir
defmodule Mix.Tasks.Phx.Gen.Channel do
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@shortdoc "Generates a Phoenix channel"
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@moduledoc """
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Generates a Phoenix channel.
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$ mix phx.gen.channel Room
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Accepts the module name for the channel
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The generated files will contain:
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For a regular application:
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* a channel in `lib/my_app_web/channels`
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* a channel test in `test/my_app_web/channels`
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For an umbrella application:
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* a channel in `apps/my_app_web/lib/app_name_web/channels`
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* a channel test in `apps/my_app_web/test/my_app_web/channels`
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"""
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use Mix.Task
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alias Mix.Tasks.Phx.Gen
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@doc false
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def run(args) do
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if Mix.Project.umbrella?() do
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Mix.raise(
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"mix phx.gen.channel must be invoked from within your *_web application root directory"
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)
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end
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[channel_name] = validate_args!(args)
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context_app = Mix.Phoenix.context_app()
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web_prefix = Mix.Phoenix.web_path(context_app)
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web_test_prefix = Mix.Phoenix.web_test_path(context_app)
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binding = Mix.Phoenix.inflect(channel_name)
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binding = Keyword.put(binding, :module, "#{binding[:web_module]}.#{binding[:scoped]}")
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Mix.Phoenix.check_module_name_availability!(binding[:module] <> "Channel")
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test_path = Path.join(web_test_prefix, "channels/#{binding[:path]}_channel_test.exs")
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case_path = Path.join(Path.dirname(web_test_prefix), "support/channel_case.ex")
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maybe_case =
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if File.exists?(case_path) do
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[]
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else
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[{:eex, "channel_case.ex", case_path}]
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end
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Mix.Phoenix.copy_from(
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paths(),
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"priv/templates/phx.gen.channel",
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binding,
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[
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{:eex, "channel.ex", Path.join(web_prefix, "channels/#{binding[:path]}_channel.ex")},
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{:eex, "channel_test.exs", test_path}
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] ++ maybe_case
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)
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user_socket_path = Mix.Phoenix.web_path(context_app, "channels/user_socket.ex")
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if File.exists?(user_socket_path) do
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Mix.shell().info("""
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Add the channel to your `#{user_socket_path}` handler, for example:
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channel "#{binding[:singular]}:lobby", #{binding[:module]}Channel
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""")
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else
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Mix.shell().info("""
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The default socket handler - #{binding[:web_module]}.UserSocket - was not found.
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""")
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if Mix.shell().yes?("Do you want to create it?") do
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Gen.Socket.run(~w(User --from-channel #{channel_name}))
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else
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Mix.shell().info("""
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To create it, please run the mix task:
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mix phx.gen.socket User
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Then add the channel to the newly created file, at `#{user_socket_path}`:
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channel "#{binding[:singular]}:lobby", #{binding[:module]}Channel
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""")
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end
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end
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end
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@spec raise_with_help() :: no_return()
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defp raise_with_help do
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Mix.raise("""
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mix phx.gen.channel expects just the module name, following capitalization:
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mix phx.gen.channel Room
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""")
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end
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defp validate_args!(args) do
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unless length(args) == 1 and args |> hd() |> valid_name?() do
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raise_with_help()
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end
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args
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end
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defp valid_name?(name) do
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name =~ ~r/^[A-Z]\w*(\.[A-Z]\w*)*$/
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end
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defp paths do
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[".", :phoenix]
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end
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end
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