Ignore repo syncs for projects without project id.

Resolves #1221.

Author: asummers

lib/code_corps_web/controllers/github_event_controller.ex

@@ -1,9 +1,11 @@
 defmodule CodeCorpsWeb.GithubEventController do
   @moduledoc false
   use CodeCorpsWeb, :controller
+  import Ecto.Query, only: [from: 2]
 
   alias CodeCorps.{
     GithubEvent,
+    GithubRepo,
     GitHub.Webhook.Handler,
     GitHub.Webhook.EventSupport,
     Helpers.Query,
@@ -43,14 +45,29 @@ defmodule CodeCorpsWeb.GithubEventController do
 
   @spec create(Conn.t, map) :: Conn.t
   def create(%Conn{} = conn, %{} = payload) do
-    type = conn |> get_event_type
-    delivery_id = conn |> get_delivery_id()
+    type = conn |> event_type()
+    delivery_id = conn |> delivery_id()
     action = payload |> Map.get("action", "")
-    event_support = type |> EventSupport.status(action)
-    event_support |> process_event(type, delivery_id, payload)
+    event_support =
+      if should_process?(payload) do
+        process_status = type |> EventSupport.status(action)
+        process_status |> process_event(type, delivery_id, payload)
+        process_status
+      else
+        :ignored
+      end
     conn |> respond_to_webhook(event_support)
   end
 
+  @spec should_process?(map) :: boolean
+  defp should_process?(%{"repository" => %{"id" => repository_id}}) do
+    query = from repo in GithubRepo,
+      where: repo.github_id == ^repository_id,
+      where: not(is_nil(repo.project_id))
+    Repo.one(query) != nil
+  end
+  defp should_process?(_), do: true
+
   @spec update(Conn.t, map) :: Conn.t
   def update(%Conn{} = conn, %{"id" => id} = params) do
     with %GithubEvent{} = github_event <- GithubEvent |> Repo.get(id),
@@ -63,13 +80,13 @@ defmodule CodeCorpsWeb.GithubEventController do
     end
   end
 
-  @spec get_event_type(Conn.t) :: String.t
-  defp get_event_type(%Conn{} = conn) do
+  @spec event_type(Conn.t) :: String.t
+  defp event_type(%Conn{} = conn) do
     conn |> get_req_header("x-github-event") |> List.first
   end
 
-  @spec get_delivery_id(Conn.t) :: String.t
-  defp get_delivery_id(%Conn{} = conn) do
+  @spec delivery_id(Conn.t) :: String.t
+  defp delivery_id(%Conn{} = conn) do
     conn |> get_req_header("x-github-delivery") |> List.first
   end
 

test/lib/code_corps_web/controllers/github_event_controller_test.exs

@@ -101,11 +101,22 @@ defmodule CodeCorpsWeb.GithubEventControllerTest do
     test "responds with 200 for an unsupported event", %{conn: conn} do
       path = conn |> github_events_path(:create)
       payload = load_event_fixture("pull_request_synchronize")
+      insert(:github_repo, github_id: payload["repository"]["id"])
       assert conn |> for_event("pull_request", "foo") |> post(path, payload) |> response(200)
 
       assert Repo.get_by(GithubEvent, github_delivery_id: "foo")
     end
 
+    @tag :github_webhook
+    test "responds with 202 for a supported event but no project_id", %{conn: conn} do
+      path = conn |> github_events_path(:create)
+      payload = load_event_fixture("pull_request_synchronize")
+      insert(:github_repo, github_id: payload["repository"]["id"], project: nil)
+      assert conn |> for_event("pull_request", "foo") |> post(path, payload) |> response(202)
+
+      refute Repo.get_by(GithubEvent, github_delivery_id: "foo")
+    end
+
     @tag :github_webhook
     test "responds with 202 for an unknown event", %{conn: conn} do
       path = conn |> github_events_path(:create)