periodically fetch new stargazer count

lib/algora/application.ex

@@ -52,8 +52,8 @@ defmodule Algora.Application do
       %{
         id: Membrane.RTMP.Source.TcpServer,
         start: {Membrane.RTMP.Source.TcpServer, :start_link, [tcp_server_options]}
-      }
-
+      },
+      Algora.Stargazer
       # Start a worker by calling: Algora.Worker.start_link(arg)
       # {Algora.Worker, arg}
     ]

lib/algora/stargazer.ex

@@ -0,0 +1,48 @@
+defmodule Algora.Stargazer do
+  require Logger
+  use GenServer
+
+  @url "https://api.github.com/repos/algora-io/tv"
+  @poll_interval :timer.minutes(10)
+
+  def start_link(cmd) do
+    GenServer.start_link(__MODULE__, cmd, name: __MODULE__)
+  end
+
+  @impl true
+  def init(cmd) do
+    {:ok, schedule_fetch(%{count: nil}, cmd, 0)}
+  end
+
+  @impl true
+  def handle_info(cmd, state) do
+    count = fetch_count() || state.count
+    {:noreply, schedule_fetch(%{state | count: count}, cmd)}
+  end
+
+  defp schedule_fetch(state, cmd, after_ms \\ @poll_interval) do
+    Process.send_after(self(), cmd, after_ms)
+    state
+  end
+
+  defp fetch_count() do
+    with {:ok, %Finch.Response{status: 200, body: body}} <-
+           :get
+           |> Finch.build(@url)
+           |> Finch.request(Algora.Finch),
+         {:ok, %{"stargazers_count" => count}} <- Jason.decode(body) do
+      count
+    else
+      _ -> nil
+    end
+  end
+
+  def count() do
+    GenServer.call(__MODULE__, :get_count)
+  end
+
+  @impl true
+  def handle_call(:get_count, _from, state) do
+    {:reply, state.count, state}
+  end
+end

lib/algora_web/components/layouts/root.html.heex

@@ -137,6 +137,7 @@
             </div>
           </a>
           <a
+            :if={Algora.Stargazer.count()}
             class="group outline-none w-fit"
             target="_blank"
             rel="noopener noreferrer"
@@ -166,7 +167,7 @@
                   </defs>
                 </svg>
                 <span class="hidden xl:block">Star</span>
-                <span class="font-semibold text-gray-300">22</span>
+                <span class="font-semibold text-gray-300"><%= Algora.Stargazer.count() %></span>
               </div>
             </div>
           </a>