theme.rb
3.39 KB
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class Theme
class << self
def system_themes
Dir.glob(RAILS_ROOT + '/public/designs/themes/*').map do |item|
File.basename(item)
end.map do |item|
new(item)
end
end
def user_themes_dir
File.join(RAILS_ROOT, 'public', 'user_themes')
end
def create(id, attributes = {})
if find(id) || system_themes.map(&:id).include?(id)
raise DuplicatedIdentifier
end
Theme.new(id, attributes).save
end
def find(the_id)
if File.directory?(File.join(user_themes_dir, the_id))
Theme.new(the_id)
else
nil
end
end
def find_by_owner(owner)
Dir.glob(File.join(user_themes_dir, '*', 'theme.yml')).select do |desc|
config = YAML.load_file(desc)
(config['owner_type'] == owner.class.base_class.name) && (config['owner_id'] == owner.id)
end.map do |desc|
Theme.find(File.basename(File.dirname(desc)))
end
end
end
class DuplicatedIdentifier < Exception; end
attr_reader :id
attr_reader :config
def initialize(id, attributes = {})
@id = id
load_config
attributes.each do |k,v|
self.send("#{k}=", v)
end
end
def name
config['name'] || id
end
def name=(value)
config['name'] = value
end
def ==(other)
other.is_a?(self.class) && (other.id == self.id)
end
def add_css(filename)
FileUtils.mkdir_p(stylesheets_directory)
FileUtils.touch(stylesheet_path(filename))
end
def update_css(filename, content)
add_css(filename)
File.open(stylesheet_path(filename), 'w') do |f|
f.write(content)
end
end
def read_css(filename)
File.read(stylesheet_path(filename))
end
def css_files
Dir.glob(File.join(stylesheets_directory, '*.css')).map { |f| File.basename(f) }
end
def add_image(filename, data)
FileUtils.mkdir_p(images_directory)
File.open(image_path(filename), 'w') do |f|
f.write(data)
end
end
def image_files
Dir.glob(image_path('*')).map {|item| File.basename(item)}
end
def stylesheet_path(filename)
suffix = ''
unless filename =~ /\.css$/
suffix = '.css'
end
File.join(stylesheets_directory, filename + suffix)
end
def stylesheets_directory
File.join(Theme.user_themes_dir, self.id, 'stylesheets')
end
def image_path(filename)
File.join(images_directory, filename)
end
def images_directory
File.join(self.class.user_themes_dir, id, 'images')
end
def save
FileUtils.mkdir_p(self.class.user_themes_dir)
FileUtils.mkdir_p(File.join(self.class.user_themes_dir, id))
%w[ common help menu article button search blocks forms login-box ].each do |item|
add_css(item)
end
write_config
self
end
def owner
return nil unless config['owner_type'] && config['owner_id']
@owner ||= config['owner_type'].constantize.find(config['owner_id'])
end
def owner=(model)
config['owner_type'] = model.class.base_class.name
config['owner_id'] = model.id
@owner = model
end
protected
def write_config
File.open(File.join(self.class.user_themes_dir, self.id, 'theme.yml'), 'w') do |f|
f.write(config.to_yaml)
end
end
def load_config
if File.exists?(File.join(self.class.user_themes_dir, self.id, 'theme.yml'))
@config = YAML.load_file(File.join(self.class.user_themes_dir, self.id, 'theme.yml'))
else
@config = {}
end
end
end