Implement thumbnail fetching for photoprism

app/controllers/api/v1/photos_controller.rb

@@ -20,16 +20,7 @@ class Api::V1::PhotosController < ApiController
 
   def fetch_cached_thumbnail(source)
     Rails.cache.fetch("photo_thumbnail_#{params[:id]}", expires_in: 1.day) do
-      source_url = current_api_user.settings["#{source}_url"]
-      source_api_key = current_api_user.settings["#{source}_api_key"]
-
-      HTTParty.get(
-        "#{source_url}/api/assets/#{params[:id]}/thumbnail?size=preview",
-        headers: {
-          'x-api-key' => source_api_key,
-          'accept' => 'application/octet-stream'
-        }
-      )
+      Photos::Thumbnail.new(current_api_user, source, params[:id]).call
     end
   end
 

app/serializers/api/photo_serializer.rb

@@ -26,7 +26,7 @@ class Api::PhotoSerializer
   attr_reader :photo, :source
 
   def id
-    photo['id'] || photo['ID']
+    photo['id'] || photo['Hash']
   end
 
   def latitude

app/services/photoprism/cache_preview_token.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class Photoprism::CachePreviewToken
+  attr_reader :user, :preview_token
+
+  TOKEN_CACHE_KEY = 'dawarich/photoprism_preview_token'
+
+  def initialize(user, preview_token)
+    @user = user
+    @preview_token = preview_token
+  end
+
+  def call
+    Rails.cache.write("#{TOKEN_CACHE_KEY}_#{user.id}", preview_token)
+  end
+end

app/services/photoprism/request_photos.rb

@@ -53,6 +53,8 @@ class Photoprism::RequestPhotos
       Rails.logger.debug "Photoprism API request params: #{request_params(offset).inspect}"
     end
 
+    cache_preview_token(response.headers)
+
     JSON.parse(response.body)
   end
 
@@ -86,4 +88,10 @@ class Photoprism::RequestPhotos
       taken_at.between?(start_date.to_datetime, end_date.to_datetime)
     end
   end
+
+  def cache_preview_token(headers)
+    preview_token = headers['X-Preview-Token']
+
+    Photoprism::CachePreviewToken.new(user, preview_token).call
+  end
 end

app/services/photos/thumbnail.rb

@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+
+class Photos::Thumbnail
+  def initialize(user, source, id)
+    @user = user
+    @source = source
+    @id = id
+  end
+
+  def call
+    fetch_thumbnail_from_source
+  end
+
+  private
+
+  attr_reader :user, :source, :id
+
+  def source_url
+    user.settings["#{source}_url"]
+  end
+
+  def source_api_key
+    user.settings["#{source}_api_key"]
+  end
+
+  def source_path
+    case source
+    when 'immich'
+      "/api/assets/#{id}/thumbnail?size=preview"
+    when 'photoprism'
+      preview_token = Rails.cache.read("#{Photoprism::CachePreviewToken::TOKEN_CACHE_KEY}_#{user.id}")
+      "/api/v1/t/#{id}/#{preview_token}/tile_500"
+    else
+      raise "Unsupported source: #{source}"
+    end
+  end
+
+  def headers
+    request_headers = {
+      'accept' => 'application/octet-stream'
+    }
+
+    request_headers['X-Api-Key'] = source_api_key if source == 'immich'
+
+    request_headers
+  end
+
+  def fetch_thumbnail_from_source
+    url = "#{source_url}#{source_path}"
+    a = HTTParty.get(url, headers: headers)
+    pp url
+    a
+  end
+end