require 'redmine'

require 'base64'

require 'dispatcher'

Redmine::Plugin.register :redmine_screenshot_paste do

  name 'Screenshot Paste'

  author 'Jean-Philippe Lang'

  description 'Allow pasting a screenshot from the clipboard on the issue form.'

  version '1.0.2'

end

class UploadedScreenshot

  def initialize(content, name)

    @raw = StringIO.new(Base64.decode64(content))

    @name = name.to_s.strip

    @name = "screenshot" if @name.blank?

    @name << ".png"

  end

  def size

    @raw.size

  end

  def original_filename

    @name

  end

  def content_type

    "image/png"

  end

  def read(*args)

    @raw.read(*args)

  end

end

module RedmineScreenshotPaste

  def self.included(base)

    base.send(:include, InstanceMethods)

    base.send(:alias_method_chain, :attach_files, :screenshot)

  end

  module InstanceMethods

    def attach_files_with_screenshot(obj, attachments)

      if screenshot = params[:uploaded_screenshot]

        file = UploadedScreenshot.new(screenshot['content'], screenshot['name'])

        attachments[:screenshot] = {:file => file,

                                    :description => screenshot['description']}

      end

      attach_files_without_screenshot(obj, attachments)

    end

  end

end

class RedmineScreenshotPasteHook < Redmine::Hook::ViewListener

  render_on :view_issues_form_details_bottom, :partial => 'screenshot'

end

Dispatcher.to_prepare :redmine_screenshot_paste do

  ApplicationController.send :include, RedmineScreenshotPaste

end