Make LastFm user agent configurable

config/config.exs

@@ -24,12 +24,15 @@ config :music_library, MusicLibraryWeb.Endpoint,
   pubsub_server: MusicLibrary.PubSub,
   live_view: [signing_salt: "g/qw4SNo"]
 
+user_agent = "MusicLibrary/0.1.0 ( cloud8421@gmail.com )"
+
 config :music_library, LastFm,
   user: "username",
   api: LastFm.APIImpl,
   auto_refresh: true,
   refresh_interval: System.convert_time_unit(60, :second, :millisecond),
-  api_key: "change me"
+  api_key: "change me",
+  user_agent: user_agent
 
 # Configure esbuild (the version is required)
 config :esbuild,

lib/last_fm/api_impl.ex

@@ -30,7 +30,7 @@ defmodule LastFm.APIImpl do
 
     Logger.debug("Fetching data from #{sanitize_url(url, config.api_key)}")
 
-    case json_get(url) do
+    case json_get(url, config.user_agent) do
       {:ok, response} ->
         {:ok,
          response
@@ -61,7 +61,7 @@ defmodule LastFm.APIImpl do
 
     Logger.debug("Fetching data from #{sanitize_url(url, config.api_key)}")
 
-    case json_get(url) do
+    case json_get(url, config.user_agent) do
       {:ok, response} ->
         {:ok,
          response
@@ -77,11 +77,10 @@ defmodule LastFm.APIImpl do
     end
   end
 
-  defp json_get(url) do
+  defp json_get(url, user_agent) do
     req =
       Finch.build(:get, url, [
-        # TODO: move user agent to config
-        {"User-Agent", "MusicLibrary/0.1.0 ( cloud8421@gmail.com )"}
+        {"User-Agent", user_agent}
       ])
 
     case Finch.request(req, LastFm.Finch, @request_opts) do

lib/last_fm/config.ex

@@ -4,14 +4,16 @@ defmodule LastFm.Config do
           api_key: String.t(),
           user: String.t(),
           auto_refresh: boolean(),
-          refresh_interval: pos_integer()
+          refresh_interval: pos_integer(),
+          user_agent: String.t()
         }
 
   defstruct api: LastFm.Api,
             api_key: "",
             user: "",
             auto_refresh: true,
-            refresh_interval: 60_000
+            refresh_interval: 60_000,
+            user_agent: "change me"
 
   @spec resolve(atom) :: t
   def resolve(otp_app) do

test/last_fm/config_test.exs

@@ -8,12 +8,14 @@ defmodule LastFm.ConfigTest do
                api_key: api_key,
                user: user,
                auto_refresh: false,
-               refresh_interval: refresh_interval
+               refresh_interval: refresh_interval,
+               user_agent: user_agent
              } =
                LastFm.Config.resolve(:music_library)
 
       assert is_binary(api_key)
       assert is_binary(user)
+      assert is_binary(user_agent)
       assert is_integer(refresh_interval)
     end
   end