Refactor ejabberd API integration

app/services/ejabberd_manager/get_avatar.rb

@@ -0,0 +1,25 @@
+module EjabberdManager
+  class GetAvatar < EjabberdManagerService
+    def initialize(user:)
+      @user = user
+    end
+
+    def call
+      res = get_vcard2 @user, "PHOTO", "BINVAL"
+
+      if res.status == 200
+        # VCARD PHOTO/BINVAL prop exists
+        img_base64 = JSON.parse(res.body)["content"]
+        ct_res = get_vcard2 @user, "PHOTO", "TYPE"
+        content_type = JSON.parse(ct_res.body)["content"]
+        { content_type:, img_base64: }
+      elsif res.status == 400
+        # VCARD or PHOTO/BINVAL prop does not exist
+        nil
+      else
+        # Unexpected error, let job fail
+        raise res.inspect
+      end
+    end
+  end
+end