module Purpur

# File lib/purpur.rb, line 76
def assets_dir
  File.join(root_dir, 'app', 'assets')
end

# File lib/purpur.rb, line 43
def icon_key(n)
  case n
  when Symbol, String
    n.downcase
  when Class
    n.name.to_s.downcase
  when Object
    n.class.name.to_s.downcase
  end
end

# File lib/purpur.rb, line 54
def icon_name(key)
  icon_names[icon_synonim(icon_key(key))]
end

# File lib/purpur.rb, line 88
def icon_names
  Hash[
    self.icons.map {|i|
      [File.basename(i, ICON_EXTENTION), File.basename(i, ICON_EXTENTION)]
    }
  ].tap do |h|
    h.default_proc = ->(_, i) { Rails.logger.warn("'#{i}' is wrong icon name. Use one of #{h.keys.join(', ')}"); i.to_s }
  end
end

# File lib/purpur.rb, line 33
def icon_size(size)
  ICON_SIZES[size]
end

# File lib/purpur.rb, line 37
def icon_synonim(key)
  (ICON_SYNONIMS_HASH.with_indifferent_access.tap do |h|
    h.default_proc = ->(_, i) { i.to_s }
  end)[key]
end

# File lib/purpur.rb, line 84
def icons
  Dir[File.join(self.images_dir, "*#{ICON_EXTENTION}")]
end

# File lib/purpur.rb, line 80
def images_dir
  File.join(assets_dir, 'icons')
end

# File lib/purpur.rb, line 64
def rails?
  defined?(::Rails::Engine)
end

# File lib/purpur.rb, line 58
def register!
  register_helpers
  register_engine     if rails?
  register_sprockets  if sprockets?
end

# File lib/purpur.rb, line 72
def root_dir
  File.expand_path "."
end

# File lib/purpur.rb, line 98
def sprite_file
  File.join(assets_dir, 'images', 'purpur.svg')
end

# File lib/purpur.rb, line 68
def sprockets?
  defined?(::Sprockets)
end

# File lib/purpur.rb, line 104
def register_engine
  require_relative 'purpur/engine'
end

# File lib/purpur.rb, line 112
def register_helpers
  require_relative 'purpur/helpers'
end

# File lib/purpur.rb, line 108
def register_sprockets
  Sprockets.append_path(File.join(File.expand_path('../../', __FILE__), 'assets'))
end