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# frozen_string_literal: true
require 'sprockets/encoding_utils'
require 'sprockets/http_utils'
require 'sprockets/utils'
module Sprockets
module Mime
include HTTPUtils, Utils
# Public: Mapping of MIME type Strings to properties Hash.
#
# key - MIME Type String
# value - Hash
# extensions - Array of extnames
# charset - Default Encoding or function to detect encoding
#
# Returns Hash.
def mime_types
config[:mime_types]
end
# Internal: Mapping of MIME extension Strings to MIME type Strings.
#
# Used for internal fast lookup purposes.
#
# Examples:
#
# mime_exts['.js'] #=> 'application/javascript'
#
# key - MIME extension String
# value - MIME Type String
#
# Returns Hash.
def mime_exts
config[:mime_exts]
end
# Public: Register a new mime type.
#
# mime_type - String MIME Type
# extensions - Array of String extnames
# charset - Proc/Method that detects the charset of a file.
# See EncodingUtils.
#
# Returns nothing.
def register_mime_type(mime_type, extensions: [], charset: nil)
extnames = Array(extensions)
charset ||= :default if mime_type.start_with?('text/')
charset = EncodingUtils::CHARSET_DETECT[charset] if charset.is_a?(Symbol)
self.config = hash_reassoc(config, :mime_exts) do |mime_exts|
extnames.each do |extname|
mime_exts[extname] = mime_type
end
mime_exts
end
self.config = hash_reassoc(config, :mime_types) do |mime_types|
type = { extensions: extnames }
type[:charset] = charset if charset
mime_types.merge(mime_type => type)
end
end
# Internal: Get detecter function for MIME type.
#
# mime_type - String MIME type
#
# Returns Proc detector or nil if none is available.
def mime_type_charset_detecter(mime_type)
if type = config[:mime_types][mime_type]
if detect = type[:charset]
return detect
end
end
end
# Public: Read file on disk with MIME type specific encoding.
#
# filename - String path
# content_type - String MIME type
#
# Returns String file contents transcoded to UTF-8 or in its external
# encoding.
def read_file(filename, content_type = nil)
data = File.binread(filename)
if detect = mime_type_charset_detecter(content_type)
detect.call(data).encode(Encoding::UTF_8, universal_newline: true)
else
data
end
end
end
end
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