Allow adjusting avatar sizes (local and remote) via config

.env.production.catcatnya

@@ -40,4 +40,5 @@ MAX_DISPLAY_NAME_CHARS=50
 MAX_POLL_OPTIONS=20
 MAX_SEARCH_RESULTS=1000
 MAX_REMOTE_EMOJI_SIZE=1048576
+# MAX_REMOTE_AVATAR_SIZE=4194304
 IP_RETENTION_PERIOD=86400

.env.production.sample

@@ -286,6 +286,13 @@ MAX_POLL_OPTION_CHARS=100
 # MAX_EMOJI_SIZE=262144
 # MAX_REMOTE_EMOJI_SIZE=262144
 
+# Maximum avatar (upload) sizes
+# If undefined or smaller than MAX_AVATAR_SIZE, the value
+# of MAX_AVATAR_SIZE will be used for MAX_REMOTE_AVATAR_SIZE
+# Units are in bytes
+# MAX_AVATAR_SIZE=2097152
+# MAX_REMOTE_AVATAR_SIZE=2097152
+
 # Optional hCaptcha support
 # HCAPTCHA_SECRET_KEY=
 # HCAPTCHA_SITE_KEY=

app/models/concerns/account_avatar.rb

@@ -4,7 +4,8 @@ module AccountAvatar
   extend ActiveSupport::Concern
 
   IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'].freeze
-  LIMIT = 2.megabytes
+  LOCAL_LIMIT = (ENV['MAX_AVATAR_SIZE'] || 2.megabytes).to_i
+  LIMIT       = [LOCAL_LIMIT, (ENV['MAX_REMOTE_AVATAR_SIZE'] || 2.megabytes).to_i].max
 
   class_methods do
     def avatar_styles(file)
@@ -20,7 +21,8 @@ module AccountAvatar
     # Avatar upload
     has_attached_file :avatar, styles: ->(f) { avatar_styles(f) }, convert_options: { all: '-strip' }, processors: [:lazy_thumbnail]
     validates_attachment_content_type :avatar, content_type: IMAGE_MIME_TYPES
-    validates_attachment_size :avatar, less_than: LIMIT
+    validates_attachment_size :avatar, less_than: LIMIT, unless: :local?
+    validates_attachment_size :avatar, less_than: LOCAL_LIMIT, if: :local?
     remotable_attachment :avatar, LIMIT, suppress_errors: false
   end