Move account header and avatar methods to a concern (#2825)

app/models/concerns/account_header.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+module AccountHeader
+  extend ActiveSupport::Concern
+  IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif'].freeze
+
+  class_methods do
+    def header_styles(file)
+      styles = { original: '700x335#' }
+      styles[:static] = { format: 'png' } if file.content_type == 'image/gif'
+      styles
+    end
+    private :header_styles
+  end
+
+  included do
+    # Header upload
+    has_attached_file :header, styles: ->(f) { header_styles(f) }, convert_options: { all: '-quality 80 -strip' }
+    validates_attachment_content_type :header, content_type: IMAGE_MIME_TYPES
+    validates_attachment_size :header, less_than: 2.megabytes
+
+    def header_original_url
+      header.url(:original)
+    end
+
+    def header_static_url
+      header_content_type == 'image/gif' ? header.url(:static) : header_original_url
+    end
+
+    def header_remote_url=(url)
+      parsed_url = Addressable::URI.parse(url).normalize
+
+      return if !%w(http https).include?(parsed_url.scheme) || parsed_url.host.empty? || self[:header_remote_url] == url
+
+      self.header              = URI.parse(parsed_url.to_s)
+      self[:header_remote_url] = url
+    rescue OpenURI::HTTPError => e
+      Rails.logger.debug "Error fetching remote header: #{e}"
+    end
+  end
+end