Include links only for supported services

apps/explorer_web/config/config.exs

@@ -20,9 +20,10 @@ config :explorer_web, ExplorerWeb.Endpoint,
 config :explorer_web, ExplorerWeb.Gettext, locales: ~w(en), default_locale: "en"
 
 config :explorer_web, ExplorerWeb.SocialMedia,
-  facebook: "https://www.facebook.com/PoaNetwork",
+  twitter: "PoaNetwork",
-  instagram: "https://www.instagram.com/PoaNetwork",
+  telegram: "oraclesnetwork",
-  twitter: "https://www.twitter.com/PoaNetwork"
+  facebook: "PoaNetwork",
+  instagram: "PoaNetwork"
 
 config :ex_cldr,
   default_locale: "en",

apps/explorer_web/lib/explorer_web/social_media.ex

@@ -3,7 +3,25 @@ defmodule ExplorerWeb.SocialMedia do
   This module provides social media links
   """
 
+  @services %{
+    facebook: "https://www.facebook.com/",
+    instagram: "https://www.instagram.com/",
+    twitter: "https://www.twitter.com/",
+    telegram: "https://t.me/"
+  }
+
   def links do
-    Application.get_env(:explorer_web, __MODULE__, [])
+    :explorer_web
+    |> Application.get_env(__MODULE__, [])
+    |> Enum.reverse()
+    |> filter_and_build_links()
+  end
+
+  # Private functions
+
+  defp filter_and_build_links(configured_services) do
+    for {name, account} <- configured_services, Map.has_key?(@services, name) do
+      {name, @services[name] <> account}
+    end
   end
 end

apps/explorer_web/test/explorer_web/features/social_media_links_test.exs

@@ -1,21 +0,0 @@
-defmodule ExplorerWeb.SocialMediaLinksTest do
-  use ExplorerWeb.FeatureCase
-
-  import Wallaby.Query
-
-  test "it shows twitter when twitter is configured", %{session: session} do
-    Application.put_env(:explorer_web, ExplorerWeb.SocialMedia, twitter: "https://twitter.com/twitter")
-
-    session
-    |> visit("/")
-    |> assert_has(css("[data-test='twitter_link']"))
-  end
-
-  test "it hides twitter when twitter is not configured", %{session: session} do
-    Application.put_env(:explorer_web, ExplorerWeb.SocialMedia, facebook: "https://facebook.com/")
-
-    session
-    |> visit("/")
-    |> refute_has(css("[data-test='twitter_link']"))
-  end
-end

apps/explorer_web/test/explorer_web/social_media_test.exs

@@ -0,0 +1,25 @@
+defmodule ExplorerWeb.SocialMediaTest do
+  use Explorer.DataCase
+
+  alias ExplorerWeb.SocialMedia
+
+  test "it filters out unsupported services" do
+    Application.put_env(
+      :explorer_web,
+      ExplorerWeb.SocialMedia,
+      twitter: "MyTwitterProfile",
+      myspace: "MyAwesomeProfile"
+    )
+
+    links = SocialMedia.links()
+    assert Keyword.has_key?(links, :twitter)
+    refute Keyword.has_key?(links, :myspace)
+  end
+
+  test "it prepends the service url" do
+    Application.put_env(:explorer_web, ExplorerWeb.SocialMedia, twitter: "MyTwitterProfile")
+
+    links = SocialMedia.links()
+    assert links[:twitter] == "https://www.twitter.com/MyTwitterProfile"
+  end
+end