Store avatars as binary instead of base64

app/models/user.rb

@@ -159,6 +159,15 @@ class User < ApplicationRecord
     @display_name ||= ldap_entry[:display_name]
   end
 
+  def avatar
+    @avatar ||= LdapManager::FetchAvatar.call(cn: cn)
+  end
+
+  def avatar_base64
+    return nil if avatar.nil?
+    @avatar_base64 ||= Base64.strict_encode64(avatar)
+  end
+
   def nostr_pubkey
     @nostr_pubkey ||= ldap_entry[:nostr_key]
   end
@@ -186,10 +195,6 @@ class User < ApplicationRecord
     ZBase32.encode(Digest::SHA1.digest(cn))
   end
 
-  def avatar
-    @avatar_base64 ||= LdapManager::FetchAvatar.call(cn: cn)
-  end
-
   def services_enabled
     ldap_entry[:services_enabled] || []
   end

app/services/ldap_manager/fetch_avatar.rb

@@ -5,12 +5,12 @@ module LdapManager
     end
 
     def call
-      treebase   = ldap_config["base"]
+      treebase = ldap_config["base"]
       attributes = %w{ jpegPhoto }
-      filter     = Net::LDAP::Filter.eq("cn", @cn)
+      filter = Net::LDAP::Filter.eq("cn", @cn)
 
       entry = client.search(base: treebase, filter: filter, attributes: attributes).first
-      entry.try(:jpegPhoto) ? entry.jpegPhoto.first : nil
+      entry&.jpegPhoto ? entry.jpegPhoto.first : nil
     end
   end
 end

app/services/ldap_manager/update_avatar.rb

@@ -8,20 +8,20 @@ module LdapManager
     end
 
     def call
-      replace_attribute @dn, :jpegPhoto, @img_data
+      result = replace_attribute @dn, :jpegPhoto, @img_data
+      result
     end
 
     private
 
     def process(file)
       processed = ImageProcessing::Vips
-        .resize_to_fill(512, 512)
+        .resize_to_fill(256, 256)
         .source(file)
         .convert("jpeg")
         .saver(strip: true)
         .call
-
+      processed.read
-      Base64.strict_encode64 processed.read
     end
   end
 end

app/views/settings/_profile.html.erb

@@ -20,7 +20,7 @@
       </button>
     </p>
     <p class="text-sm text-gray-500">
-      Your user address for Chat and Lightning Network.
+      Your account's address on the Internet
     </p>
   </div>
   <%= form_for(@user, url: setting_path(:profile), html: { :method => :put }) do |f| %>
@@ -40,9 +40,10 @@
         Default profile picture
       </p>
       <div class="flex items-center gap-6">
-        <% if current_user.avatar.present? %>
+        <% unless current_user.avatar.nil? %>
         <p class="flex-none">
-          <%= image_tag "data:image/jpeg;base64,#{current_user.avatar}", class: "h-24 w-24 rounded-lg" %>
+          <%= image_tag "data:image/jpeg;base64,#{current_user.avatar_base64}",
+                class: "h-24 w-24 rounded-lg" %>
         </p>
         <% end %>
         <div class="grow">

spec/features/settings/profile_spec.rb

@@ -2,18 +2,22 @@ require 'rails_helper'
 
 RSpec.describe 'Profile settings', type: :feature do
   let(:user) { create :user, cn: "mwahlberg" }
-  let(:avatar_base64) { File.read("#{Rails.root}/spec/fixtures/files/avatar-base64.txt") }
+  let(:avatar_jpeg) { File.binread("#{Rails.root}/spec/fixtures/files/taipei.jpg") }
 
   before do
+    Flipper.enable "avatar_upload"
+
     login_as user, :scope => :user
     allow(user).to receive(:display_name).and_return("Mark")
-    allow_any_instance_of(User).to receive(:dn).and_return("cn=mwahlberg,ou=kosmos.org,cn=users,dc=kosmos,dc=org")
-    allow_any_instance_of(User).to receive(:ldap_entry).and_return({
-      uid: user.cn, ou: user.ou, display_name: "Mark", pgp_key: nil
-    })
-    allow_any_instance_of(User).to receive(:avatar).and_return(avatar_base64)
 
-    Flipper.enable "avatar_upload"
+    allow_any_instance_of(User).to receive(:dn)
+      .and_return("cn=mwahlberg,ou=kosmos.org,cn=users,dc=kosmos,dc=org")
+    allow_any_instance_of(User).to receive(:ldap_entry)
+      .and_return({
+        uid: user.cn, ou: user.ou, display_name: "Mark", pgp_key: nil
+      })
+    allow_any_instance_of(User).to receive(:avatar)
+      .and_return(avatar_jpeg)
   end
 
   feature "Update display name" do
@@ -70,8 +74,8 @@ RSpec.describe 'Profile settings', type: :feature do
     scenario 'works with valid JPG file' do
       file_path = "#{Rails.root}/spec/fixtures/files/taipei.jpg"
 
-      expect_any_instance_of(LdapManager::UpdateAvatar).to receive(:replace_attribute)
+      expect_any_instance_of(LdapManager::UpdateAvatar)
-        .with(user.dn, :jpegPhoto, avatar_base64).and_return(true)
+        .to receive(:replace_attribute).and_return(true)
 
       visit setting_path(:profile)
       attach_file "Avatar", file_path
@@ -86,7 +90,8 @@ RSpec.describe 'Profile settings', type: :feature do
     scenario 'works with valid PNG file' do
       file_path = "#{Rails.root}/spec/fixtures/files/bender.png"
 
-      expect(LdapManager::UpdateAvatar).to receive(:call).and_return(true)
+      expect_any_instance_of(LdapManager::UpdateAvatar)
+        .to receive(:replace_attribute).and_return(true)
 
       visit setting_path(:profile)
       attach_file "Avatar", file_path