Fix branch name from Push event

- closes #30

Signed-off-by: Tallys Martins <tallysmartins@gmail.com>

lib/elixir_bench_web/controllers/github/webhooks_controller.ex

@@ -17,17 +17,22 @@ defmodule ElixirBenchWeb.Github.WebHooks do
 
   defp extract_job_attrs("push", payload) do
     slug = get_in(payload, ["repository", "full_name"])
-    branch_name = get_in(payload, ["ref"])
     commit_sha = get_in(payload, ["after"])
 
+    branch_name =
+      case get_in(payload, ["ref"]) do
+        nil -> nil
+        name -> String.replace(name, "refs/heads/", "")
+      end
+
     %{slug: slug, branch_name: branch_name, commit_sha: commit_sha}
   end
 
   defp extract_job_attrs("pull_request", payload) do
     # data is fetched from sender's repository refered as "head"
     slug = get_in(payload, ["pull_request", "head", "repo", "full_name"])
-    branch_name = get_in(payload, ["pull_request", "head", "ref"])
     commit_sha = get_in(payload, ["pull_request", "head", "sha"])
+    branch_name = get_in(payload, ["pull_request", "head", "ref"])
 
     %{slug: slug, branch_name: branch_name, commit_sha: commit_sha}
   end