Migrate to Vue 3 and Vite

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

lib/service/pictures/unsplash.ex

@@ -0,0 +1,65 @@
+defmodule Mobilizon.Service.Pictures.Unsplash do
+  @moduledoc """
+  [Unsplash](https://unsplash.com) backend.
+  """
+
+  alias Mobilizon.Service.Pictures.{Information, Provider}
+  alias Mobilizon.Service.HTTP.GenericJSONClient
+  require Logger
+
+  @unsplash_api "/search/photos"
+  @unsplash_name "Unsplash"
+
+  @behaviour Provider
+
+  @impl Provider
+  @doc """
+  Unsplash implementation for `c:Mobilizon.Service.Geospatial.Provider.geocode/3`.
+  """
+  @spec search(String.t(), keyword()) :: list(Information.t())
+  def search(location, _options \\ []) do
+    url = "#{unsplash_endpoint()}#{@unsplash_api}?query=#{location}&orientation=landscape"
+
+    client =
+      GenericJSONClient.client(headers: [{:Authorization, "Client-ID #{unsplash_access_key()}"}])
+
+    with {:ok, %{status: 200, body: body}} <- GenericJSONClient.get(client, url),
+         selectedPicture <- Enum.random(body["results"]) do
+      %Information{
+        url: selectedPicture["urls"]["small"],
+        author: %{
+          name: selectedPicture["user"]["name"],
+          url: "#{selectedPicture["user"]["links"]["html"]}#{unsplash_utm_source()}"
+        },
+        source: %{
+          name: @unsplash_name,
+          url: unsplash_url()
+        }
+      }
+    else
+      _ ->
+        nil
+    end
+  end
+
+  defp unsplash_app_name do
+    Application.get_env(:mobilizon, __MODULE__) |> get_in([:app_name])
+  end
+
+  defp unsplash_utm_source do
+    "?utm_source=#{unsplash_app_name()}&utm_medium=referral"
+  end
+
+  defp unsplash_url do
+    "https://unsplash.com/#{unsplash_utm_source()}"
+  end
+
+  defp unsplash_endpoint do
+    Application.get_env(:mobilizon, __MODULE__) |> get_in([:endpoint]) ||
+      "https://api.unsplash.com"
+  end
+
+  defp unsplash_access_key do
+    Application.get_env(:mobilizon, __MODULE__) |> get_in([:access_key])
+  end
+end