Add SimplyStored::HasAttachment — Paperclip replacement for CouchDB
- New module lib/simply_stored/has_attachment.rb Drop-in replacement using MiniMagick for thumbnail generation. Same file paths as Paperclip — zero migration of existing files. Auto-declares CouchDB properties for attachment metadata. Proxy object mimics Paperclip::Attachment API for view compat. - Wired into lib/cmtool.rb - Added TODO migration comments to Image, News, Quote models
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BenClaw
@@ -7,5 +7,11 @@ require 'cmtool/includes/pages_controller'
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require 'cmtool/menu'
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require 'email_validator'
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# Paperclip replacement — stores file metadata as CouchDB properties,
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# handles thumbnail generation via MiniMagick.
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# Replace `include Paperclip::Glue` + `has_attached_file` with
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# `include SimplyStored::HasAttachment` + `has_attachment`
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require 'simply_stored/has_attachment'
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module Cmtool
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end
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@@ -0,0 +1,225 @@
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# frozen_string_literal: true
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module SimplyStored
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# Drop-in replacement for Paperclip in SimplyStored/CouchDB models.
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#
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# Usage (replaces `include Paperclip::Glue` + `has_attached_file`):
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#
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# class Image
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# include SimplyStored::Couch
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# include SimplyStored::HasAttachment
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#
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# has_attachment :file, styles: {
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# medium: "354x1000>",
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# thumb: "160x1250>"
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# }
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#
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# # Validations (standard Rails, replaces validates_attachment)
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# validate :file_content_type_must_be_image
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#
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# private
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#
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# def file_content_type_must_be_image
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# return if file.blank?
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# unless %w[image/jpeg image/gif image/png].include?(file_content_type)
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# errors.add(:file, :invalid_content_type)
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# end
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# end
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# end
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#
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# The module auto-declares CouchDB properties for:
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# <name>_file_name, <name>_content_type, <name>_file_size, <name>_updated_at
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#
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# Files are stored on disk at:
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# public/system/<attachment>/<id>/original.<ext>
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# public/system/<attachment>/<id>/<style>.<ext>
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#
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# Uses MiniMagick (ImageMagick) for thumbnail generation.
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# Same geometry syntax as Paperclip: "300x300>", "160x1250>", etc.
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module HasAttachment
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def self.included(base)
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base.extend(ClassMethods)
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end
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# Proxy object returned by attachment getters (e.g. `image.file`).
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# Mimics the Paperclip::Attachment API that views expect.
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class Proxy
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def initialize(record, name)
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@record = record
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@name = name
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end
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def present?
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@record.send(:"#{@name}_file_name").present?
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end
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def blank?
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!present?
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end
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def url(style = nil)
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@record.send(:"#{@name}_url", style)
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end
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def original_filename
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@record.send(:"#{@name}_file_name")
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end
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def content_type
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@record.send(:"#{@name}_content_type")
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end
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def size
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@record.send(:"#{@name}_file_size")
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end
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# Delegate anything else to the record
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def method_missing(method, *args, &block)
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if @record.respond_to?(method, true)
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@record.send(method, *args, &block)
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else
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super
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end
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end
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def respond_to_missing?(method, include_private = false)
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@record.respond_to?(method, include_private) || super
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end
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end
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module ClassMethods
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def has_attachment(name, styles: {}, default_url: nil, default_style: :original)
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# Auto-declare CouchDB properties for attachment metadata
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property :"#{name}_file_name"
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property :"#{name}_content_type"
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property :"#{name}_file_size", type: Integer
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property :"#{name}_updated_at", type: Time
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# Register configuration
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attachment_registry[name] = {
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styles: styles,
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default_url: default_url,
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default_style: default_style,
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}
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# ---- Setter: model.file = uploaded_file ----
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define_method(:"#{name}=") do |uploaded|
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# Handle clearing: nil, empty string
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if uploaded.nil? || (uploaded.respond_to?(:empty?) && uploaded.empty?)
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send(:"#{name}_file_name=", nil)
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send(:"#{name}_content_type=", nil)
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send(:"#{name}_file_size=", nil)
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send(:"#{name}_updated_at=", nil)
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return
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end
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config = self.class.attachment_registry[name]
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# Extract file info
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original_filename = if uploaded.respond_to?(:original_filename)
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uploaded.original_filename
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elsif uploaded.respond_to?(:path)
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File.basename(uploaded.path)
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else
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"file"
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end
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ext = File.extname(original_filename)
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ext = ".bin" if ext.blank?
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content_type = uploaded.respond_to?(:content_type) ? uploaded.content_type : nil
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file_size = uploaded.respond_to?(:size) ? uploaded.size : nil
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# Read content (handle multiple upload types)
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content = if uploaded.respond_to?(:read)
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data = uploaded.read
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uploaded.rewind if uploaded.respond_to?(:rewind)
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data
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elsif uploaded.respond_to?(:path) && File.exist?(uploaded.path)
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File.binread(uploaded.path)
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elsif uploaded.respond_to?(:tempfile)
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uploaded.tempfile.read
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else
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uploaded.to_s
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end
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# Build storage path
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record_id = respond_to?(:id) && id.present? ? id.to_s : "tmp"
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base_dir = Rails.root.join("public", "system", name.to_s, record_id)
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FileUtils.mkdir_p(base_dir)
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begin
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# Write original file
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original_path = base_dir.join("original#{ext}")
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File.binwrite(original_path, content)
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# Generate thumbnail styles
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config[:styles].each do |style_name, geometry|
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style_path = base_dir.join("#{style_name}#{ext}")
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begin
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image = MiniMagick::Image.open(original_path.to_s)
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image.resize(geometry)
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image.write(style_path.to_s)
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rescue StandardError => e
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# If ImageMagick fails, copy original as fallback
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Rails.logger.warn(
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"[HasAttachment] Could not generate #{style_name} for #{name}: #{e.message}"
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)
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FileUtils.cp(original_path, style_path)
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end
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end
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# Store metadata as CouchDB properties
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send(:"#{name}_file_name=", original_filename)
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send(:"#{name}_content_type=", content_type)
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send(:"#{name}_file_size=", file_size || content.bytesize)
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send(:"#{name}_updated_at=", Time.current)
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rescue StandardError => e
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errors.add(name, "could not be processed: #{e.message}")
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Rails.logger.error("[HasAttachment] Error processing #{name}: #{e.message}")
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end
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end
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# ---- Getter: model.file → Proxy ----
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define_method(name) do
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Proxy.new(self, name)
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end
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# ---- URL helper: model.file_url(:thumb) ----
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define_method(:"#{name}_url") do |style_name = nil|
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config = self.class.attachment_registry[name]
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style_name ||= config[:default_style]
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fname = send(:"#{name}_file_name")
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if fname.blank?
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return config[:default_url] if config[:default_url]
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return nil
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end
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ext = File.extname(fname)
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record_id = respond_to?(:id) && id.present? ? id.to_s : "tmp"
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"/system/#{name}/#{record_id}/#{style_name}#{ext}"
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end
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# ---- Backward compat: *_path for Paperclip migrations ----
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define_method(:"#{name}_path") do |style_name = nil|
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config = self.class.attachment_registry[name]
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style_name ||= config[:default_style]
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fname = send(:"#{name}_file_name")
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return nil if fname.blank?
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ext = File.extname(fname)
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record_id = respond_to?(:id) && id.present? ? id.to_s : "tmp"
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Rails.root.join("public", "system", name.to_s, record_id, "#{style_name}#{ext}").to_s
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end
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end
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# Registry of all attachments defined on this class
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def attachment_registry
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@_has_attachment_registry ||= {}
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end
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end
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end
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end
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