Add basic metadata to opengraph preview

Also refactor datetime & address utils

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

test/service/date_time/date_time.exs

@@ -0,0 +1,71 @@
+defmodule Mobilizon.Service.DateTimeTest do
+  @moduledoc """
+  Test representing datetimes in defined locale
+  """
+  use Mobilizon.DataCase
+  alias Mobilizon.Service.DateTime, as: DateTimeRenderer
+
+  @datetime "2021-06-22T15:25:29.531539Z"
+
+  describe "render a datetime to string" do
+    test "standard datetime" do
+      {:ok, datetime, _} = DateTime.from_iso8601(@datetime)
+      assert DateTimeRenderer.datetime_to_string(datetime) == "Jun 22, 2021, 3:25:29 PM"
+      assert DateTimeRenderer.datetime_to_string(datetime, "fr") == "22 juin 2021, 15:25:29"
+
+      assert DateTimeRenderer.datetime_to_string(datetime, "fr", :long) ==
+               "22 juin 2021 à 15:25:29 UTC"
+    end
+
+    test "non existing or loaded locale fallbacks to english" do
+      {:ok, datetime, _} = DateTime.from_iso8601(@datetime)
+
+      assert DateTimeRenderer.datetime_to_string(datetime, "es") == "Jun 22, 2021, 3:25:29 PM"
+    end
+  end
+
+  describe "render a time to string" do
+    test "standard time" do
+      {:ok, datetime, _} = DateTime.from_iso8601(@datetime)
+      assert DateTimeRenderer.datetime_to_time_string(datetime) == "3:25 PM"
+      assert DateTimeRenderer.datetime_to_time_string(datetime, "fr") == "15:25"
+    end
+
+    test "non existing or loaded locale fallbacks to english" do
+      {:ok, datetime, _} = DateTime.from_iso8601(@datetime)
+
+      assert DateTimeRenderer.datetime_to_time_string(datetime, "pl") == "3:25 PM"
+    end
+  end
+
+  describe "convert a datetime with a timezone" do
+    test "with an existing tz" do
+      {:ok, datetime, _} = DateTime.from_iso8601(@datetime)
+      converted_datetime = DateTimeRenderer.datetime_tz_convert(datetime, "Europe/Paris")
+
+      assert %DateTime{time_zone: "Europe/Paris", utc_offset: 3600} = converted_datetime
+      assert converted_datetime |> DateTime.to_unix() == datetime |> DateTime.to_unix()
+    end
+
+    test "with an non existing tz" do
+      {:ok, datetime, _} = DateTime.from_iso8601(@datetime)
+      converted_datetime = DateTimeRenderer.datetime_tz_convert(datetime, "Planet/Mars")
+
+      assert converted_datetime == datetime
+    end
+  end
+
+  describe "gets relative time to a datetime" do
+    test "standard time" do
+      then = DateTime.add(DateTime.utc_now(), 3600 * -5)
+      assert DateTimeRenderer.datetime_relative(then) == "5 hours ago"
+      assert DateTimeRenderer.datetime_relative(then, "fr") == "il y a 5 heures"
+    end
+
+    test "non existing or loaded locale fallbacks to english" do
+      then = DateTime.add(DateTime.utc_now(), 3600 * -4)
+
+      assert DateTimeRenderer.datetime_relative(then, "pl") == "4 hours ago"
+    end
+  end
+end