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Create elixir_forum_discourse_rss_opml_generator.livemd
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public-apps/elixir_forum_discourse_rss_opml_generator.livemd
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| 1 |
+
<!-- livebook:{"app_settings":{"access_type":"public","output_type":"rich","show_source":true,"slug":"elixir-forum-discourse-opml-generator"}} -->
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# ElixirForum Discourse RSS OPML Generator
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```elixir
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Mix.install([
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{:kino, "~> 0.12.3"}
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])
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```
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## Section
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```elixir
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defmodule Discourse.OPML do
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defmodule Behaviour do
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@callback outline(list(String.t())) :: String.t()
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end
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def generate(usernames, forum_specific_generator) do
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outline = forum_specific_generator.outline(usernames)
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"""
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<?xml version="1.0" encoding="UTF-8"?>
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<opml version="1.0">
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<head>
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<title>RSS OPML Subscriptions</title>
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</head>
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<body>
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#{outline}
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</body>
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</opml>
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"""
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end
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defmodule ElixirForum do
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@behaviour Discourse.OPML.Behaviour
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@impl true
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def outline(usernames) do
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inner_outlines = Enum.map(usernames, &outlines_for_user/1)
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"""
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<outline title="ElixirForum" text="ElixirForum">
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#{inner_outlines}
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</outline>
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"""
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end
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defp outlines_for_user(username) do
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"""
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<outline
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text="Latest posts by @#{username}"
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title="Latest posts by @#{username}"
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type="rss"
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xmlUrl="https://elixirforum.com/users/#{username}/activity.rss"
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htmlUrl="https://elixirforum.com/u/#{username}/activity"
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/>
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<outline
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text="Latest topics by @#{username}"
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title="Latest topics by @#{username}"
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type="rss"
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xmlUrl="https://elixirforum.com/users/#{username}/activity/topics.rss"
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htmlUrl="https://elixirforum.com/u/#{username}/activity/topics"
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/>
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"""
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end
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end
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end
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```
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```elixir
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default_usernames =
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[
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"josevalim",
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"mhanberg",
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"wojtekmach",
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"nicd",
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"dorgan",
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"axelson",
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"benwilson512",
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"LostKobrakai",
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"Fl4m3Ph03n1x",
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"NobbZ",
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"hauleth",
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"astonj",
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"michalmuskala",
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"mbuhot",
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"ConnorRigby",
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"derpycoder"
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]
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|> Enum.join("\n")
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form =
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Kino.Control.form(
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[
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usernames:
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Kino.Input.textarea("Elixir forum usernames (one per line)", default: default_usernames)
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],
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submit: "Generate OPML"
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)
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```
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```elixir
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output_frame = Kino.Frame.new()
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Kino.listen(form, fn event ->
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IO.inspect(event)
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%{origin: origin, data: %{usernames: usernames}} = event
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opml =
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usernames
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|> String.split()
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|> Enum.map(&String.downcase/1)
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|> Enum.sort()
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|> Discourse.OPML.generate(Discourse.OPML.ElixirForum)
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|> Kino.Text.new()
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Kino.Frame.render(output_frame, opml, to: origin)
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end)
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output_frame
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```
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