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
-
-      Base64.strict_encode64 processed.read
+      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">