initial commit

.gitignore

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+/_build
+/cover
+/deps
+erl_crash.dump
+*.ez

README.md

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+# Microformats2
+
+**TODO: Add description**
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed as:
+
+  1. Add microformats2 to your list of dependencies in `mix.exs`:
+
+        def deps do
+          [{:microformats2, "~> 0.0.1"}]
+        end
+
+  2. Ensure microformats2 is started before your application:
+
+        def application do
+          [applications: [:microformats2]]
+        end
+

config/config.exs

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+# This file is responsible for configuring your application
+# and its dependencies with the aid of the Mix.Config module.
+use Mix.Config
+
+# This configuration is loaded before any dependency and is restricted
+# to this project. If another project depends on this project, this
+# file won't be loaded nor affect the parent project. For this reason,
+# if you want to provide default values for your application for
+# 3rd-party users, it should be done in your "mix.exs" file.
+
+# You can configure for your application as:
+#
+#     config :microformats2, key: :value
+#
+# And access this configuration in your application as:
+#
+#     Application.get_env(:microformats2, :key)
+#
+# Or configure a 3rd-party app:
+#
+#     config :logger, level: :info
+#
+
+# It is also possible to import configuration files, relative to this
+# directory. For example, you can emulate configuration per environment
+# by uncommenting the line below and defining dev.exs, test.exs and such.
+# Configuration from the imported file will override the ones defined
+# here (which is why it is important to import them last).
+#
+#     import_config "#{Mix.env}.exs"

lib/microformats2.ex

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+defmodule Microformats2 do
+  def parse(content) when is_bitstring(content) do
+    doc = Floki.parse(content)
+    rels = parse_rels(doc)
+
+    %{items: [], rels: rels[:rels], rel_urls: rels[:rel_urls]}
+  end
+
+  defp parse_rels(doc) do
+    link_rels = Floki.find(doc, "[rel][href]") |>
+      Enum.filter(fn(element) ->
+        rel = Floki.attribute(element, "rel") |> List.first
+        href = Floki.attribute(element, "href") |> List.first
+        String.strip(to_string(rel)) != "" and String.strip(to_string(href)) != ""
+      end) |>
+      Enum.reduce(%{rels: %{}, rel_urls: %{}}, fn(element, acc) ->
+        rel = Floki.attribute(element, "rel") |> List.first |> String.split(" ", trim: true)
+        url = Floki.attribute(element, "href") |> List.first # TODO convert to absolute URL
+
+        n_map = Enum.reduce(rel, acc, fn(rel, map) ->
+          if map[:rels][rel] == nil do
+            Map.put(map, :rels, Map.put(map[:rels], rel, [url]))
+          else
+            Map.put(map, :rels, Map.put(map[:rels], rel, Enum.uniq(map[:rels][rel] ++ [url])))
+          end
+        end)
+
+        if n_map[:rel_urls][url] == nil do
+          Map.put(n_map, :rel_urls, Map.put(n_map[:rel_urls], url, rel))
+        else
+          Map.put(n_map, :rel_urls, Map.put(n_map[:rel_urls], url, Enum.uniq(n_map[:rel_urls][url] ++ rel)))
+        end
+      end)
+
+    link_rels
+  end
+end

mix.exs

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+defmodule Microformats2.Mixfile do
+  use Mix.Project
+
+  def project do
+    [app: :microformats2,
+     version: "0.0.1",
+     elixir: "~> 1.2",
+     build_embedded: Mix.env == :prod,
+     start_permanent: Mix.env == :prod,
+     deps: deps]
+  end
+
+  # Configuration for the OTP application
+  #
+  # Type "mix help compile.app" for more information
+  def application do
+    [applications: [:logger]]
+  end
+
+  # Dependencies can be Hex packages:
+  #
+  #   {:mydep, "~> 0.3.0"}
+  #
+  # Or git/path repositories:
+  #
+  #   {:mydep, git: "https://github.com/elixir-lang/mydep.git", tag: "0.1.0"}
+  #
+  # Type "mix help deps" for more examples and options
+  defp deps do
+    [{:floki, "~> 0.7"}]
+  end
+end

mix.lock

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+%{"floki": {:hex, :floki, "0.7.1"},
+  "mochiweb": {:hex, :mochiweb, "2.12.2"}}

test/microformats2_test.exs

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+defmodule Microformats2Test do
+  use ExUnit.Case
+  doctest Microformats2
+
+  test "parse successfully parses rels" do
+    assert(Microformats2.parse("<a rel=\"me\" href=\"http://blub\">blub</a>") ==
+      %{items: [],
+        rel_urls: %{"http://blub" => ["me"]},
+        rels: %{"me" => ["http://blub"]}})
+  end
+
+  test "parse successfully parses multiple rels" do
+    assert(Microformats2.parse("""
+<a rel=\"me\" href=\"http://blub\">blub</a>
+<a rel=\"me\" href=\"http://blah\">blub</a>
+""") ==
+      %{items: [],
+        rel_urls: %{"http://blub" => ["me"],
+                    "http://blah" => ["me"]},
+        rels: %{"me" => ["http://blub", "http://blah"]}})
+  end
+
+  test "parse only saves one URL" do
+    assert(Microformats2.parse("""
+<a rel=\"me\" href=\"http://blub\">blub</a>
+<a rel=\"me\" href=\"http://blub\">blub</a>
+""") ==
+      %{items: [],
+        rel_urls: %{"http://blub" => ["me"]},
+        rels: %{"me" => ["http://blub"]}})
+  end
+
+  test "parse saves all rels" do
+    assert(Microformats2.parse("""
+<a rel=\"me\" href=\"http://blub\">blub</a>
+<a rel=\"moo\" href=\"http://blub\">blub</a>
+""") ==
+      %{items: [],
+        rel_urls: %{"http://blub" => ["me", "moo"]},
+        rels: %{"me" => ["http://blub"],
+                "moo" => ["http://blub"]}})
+  end
+
+  test "parse generates an absolute URL" do
+    assert false, "TODO"
+  end
+
+end

test/test_helper.exs

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+ExUnit.start()