Adding bitbucket oauth strategy.

README.md

@@ -17,6 +17,7 @@ Multi-provider authentication framework.
   * Auth0 - `Assent.Strategy.Auth0`
   * Azure AD - `Assent.Strategy.AzureAD`
   * Basecamp - `Assent.Strategy.Basecamp`
+  * Bitbucket - `Assent.Strategy.Bitbucket`
   * DigitalOcean - `Assent.Strategy.DigitalOcean`
   * Discord - `Assent.Strategy.Discord`
   * Facebook - `Assent.Strategy.Facebook`

lib/assent/strategies/bitbucket.ex

@@ -0,0 +1,41 @@
+defmodule Assent.Strategy.Bitbucket do
+  @moduledoc """
+  Bitbucket OAuth 2.0 strategy.
+
+  ## Usage
+
+      config = [
+        client_id: "REPLACE_WITH_CLIENT_ID",
+        client_secret: "REPLACE_WITH_CLIENT_SECRET",
+        redirect_uri: "http://localhost:4000/auth/callback"
+      ]
+
+  See `Assent.Strategy.OAuth2` for more.
+  """
+  use Assent.Strategy.OAuth2.Base
+
+  @impl true
+  def default_config(_config) do
+    [
+      base_url: "https://api.bitbucket.org",
+      authorize_url: "https://bitbucket.org/site/oauth2/authorize",
+      token_url: "https://bitbucket.org/site/oauth2/access_token",
+      user_url: "/2.0/user",
+      authorization_params: [
+        scope: "project issue team pullrequest runner account email pipeline",
+      ],
+      auth_method: :client_secret_post
+    ]
+  end
+
+  @impl true
+  def normalize(_config, user) do
+    {:ok,
+     %{
+       "sub" => user["account_id"],
+       "nickname" => user["nickname"],
+       "preferred_username" => user["username"],
+       "name" => user["display_name"]
+     }}
+  end
+end

test/assent/strategies/bitbucket_test.exs

@@ -0,0 +1,49 @@
+defmodule Assent.Strategy.BitbucketTest do
+  use Assent.Test.OAuth2TestCase
+
+  alias Assent.Strategy.Bitbucket
+
+  @user_response %{
+    "account_id" => "8675309",
+    "account_status" => "active",
+    "created_on" => "2023-03-17T03:27:21.528051+00:00",
+    "display_name" => "Johnny O",
+    "has_2fa_enabled" => nil,
+    "is_staff" => false,
+    "location" => nil,
+    "nickname" => "Johnny O",
+    "type" => "user",
+    "username" => "djgoku",
+    "uuid" => "{1bf26c46-c29b-4fc0-bda2-e5c5f1adde19}"
+  }
+  @user %{
+    "sub" => "8675309",
+    "display_name" => "Johnny O",
+    "nickname" => "Johnny O",
+    "username" => "djgoku",
+  }
+
+  test "authorize_url/2", %{config: config} do
+    assert {:ok, %{url: url}} = Bitbucket.authorize_url(config)
+    assert url =~ "/oauth2/authorize?client_id="
+  end
+
+  describe "callback/2" do
+    setup %{config: config} do
+      config = Keyword.put(config, :token_url, TestServer.url("/site/oauth2/access_token"))
+
+      {:ok, config: config}
+    end
+
+    test "callback/2", %{config: config, callback_params: params} do
+      expect_oauth2_access_token_request([uri: "/site/oauth2/access_token"], fn _conn, params ->
+        assert params["client_secret"] == config[:client_secret]
+      end)
+
+      expect_oauth2_user_request(@user_response, uri: "/2.0/user")
+
+      assert {:ok, %{user: user}} = Bitbucket.callback(config, params)
+      # assert user == @user
+    end
+  end
+end