Class: Glimmer::ImagePathsController

Inherits:
ApplicationController show all
Defined in:
app/controllers/glimmer/image_paths_controller.rb

Instance Method Summary collapse

Instance Method Details

#index ⇒ Object 



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# File 'app/controllers/glimmer/image_paths_controller.rb', line 5

def index
  # TODO apply caching in the future to avoid recopying files on every request
  Gem.loaded_specs.map(&:last).select {|s| s.name == 'glimmer-dsl-opal' || s.dependencies.detect {|dep| dep.name == 'glimmer-dsl-opal'} }
  full_gem_specs = Gem.loaded_specs.map(&:last).select do |s|
    s.name == 'glimmer-dsl-opal' ||
      Glimmer::Config.gems_having_image_paths.to_a.include?(s.name) || # consider turning into a Glimmer::Config server-side option
      s.dependencies.detect {|dep| dep.name == 'glimmer-dsl-swt'}
  end
  full_gem_paths = full_gem_specs.map {|gem_spec| gem_spec.full_gem_path}
  full_gem_names = full_gem_paths.map {|path| File.basename(path)}
  full_gem_image_path_collections = full_gem_paths.map do |gem_path|
    Dir[File.join(gem_path, '**', '*')].to_a.select {|f| !!f.match(/(png|jpg|jpeg|gif)$/) }
  end
  download_gem_image_path_collections = full_gem_names.size.times.map do |n|
    full_gem_name = full_gem_names[n]
    full_gem_image_paths = full_gem_image_path_collections[n]
    full_gem_image_paths.map do |image_path|
      File.join(full_gem_name, image_path.split(full_gem_name).last)
    end
  end
  download_gem_image_paths = download_gem_image_path_collections.flatten
  download_gem_image_dir_names = download_gem_image_paths.map {|p| File.dirname(p)}.uniq
  download_gem_image_dir_names.each do |image_dir_name|
    FileUtils.mkdir_p(Rails.root.join('app', 'assets', 'images', image_dir_name))
  end
  full_gem_names.size.times.each do |n|
    full_image_paths = full_gem_image_path_collections[n]
    download_image_paths = download_gem_image_path_collections[n]
    full_image_paths.each_with_index do |image_path, i|
      download_image_path = download_image_paths[i]
      image_dir_name = File.dirname(image_path)
      FileUtils.cp_r(image_path, Rails.root.join('app', 'assets', 'images', download_image_path)) # TODO check first if files match and avoid copying if so to save time
    end
  end
  download_gem_image_paths = download_gem_image_paths.map {|p| "/assets/#{p}"}
  # TODO apply a security white list
  render json: download_gem_image_paths
end