Make sure no errors raised if source is nil or unknown

app/helpers/trips_helper.rb

@@ -21,6 +21,8 @@ module TripsHelper
       immich_search_url(settings['immich_url'], start_date, end_date)
     when 'photoprism'
       photoprism_search_url(settings['photoprism_url'], start_date, end_date)
+    else
+      nil # return nil for nil or unknown source
     end
   end
 

app/serializers/api/photo_serializer.rb

@@ -68,6 +68,8 @@ class Api::PhotoSerializer
       photo.dig('exifInfo', 'orientation') == '6' ? 'portrait' : 'landscape'
     when 'photoprism'
       photo['Portrait'] ? 'portrait' : 'landscape'
+    else
+      'landscape' # default orientation for nil or unknown source
     end
   end
 end

app/services/imports/create.rb

@@ -49,6 +49,8 @@ class Imports::Create
   private
 
   def importer(source)
+    return raise ArgumentError, 'Import source cannot be nil' if source.nil?
+
     case source.to_s
     when 'google_semantic_history'      then GoogleMaps::SemanticHistoryImporter
     when 'google_phone_takeout'         then GoogleMaps::PhoneTakeoutImporter

app/services/imports/watcher.rb

@@ -70,12 +70,14 @@ class Imports::Watcher
   end
 
   def mime_type(source)
-    case source.to_sym
+    case source&.to_sym
     when :gpx then 'application/xml'
     when :json, :geojson, :google_phone_takeout, :google_records, :google_semantic_history
       'application/json'
     when :owntracks
       'application/octet-stream'
+    when nil
+      'application/octet-stream' # fallback MIME type for nil source
     else
       raise UnsupportedSourceError, "Unsupported source: #{source}"
     end

app/services/photos/thumbnail.rb

@@ -10,6 +10,7 @@ class Photos::Thumbnail
   end
 
   def call
+    raise ArgumentError, 'Photo source cannot be nil' if source.nil?
     raise unsupported_source_error unless SUPPORTED_SOURCES.include?(source)
 
     HTTParty.get(request_url, headers: headers)