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# Redmine - project management software

# Copyright (C) 2006-2014  Jean-Philippe Lang

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# of the License, or (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

require 'mime/types'

module Redmine

  module MimeType

    MIME_TYPES = {

      'text/plain' => 'txt,tpl,properties,patch,diff,ini,readme,install,upgrade',

      'text/css' => 'css',

      'text/html' => 'html,htm,xhtml',

      'text/jsp' => 'jsp',

      'text/x-c' => 'c,cpp,cc,h,hh',

      'text/x-csharp' => 'cs',

      'text/x-java' => 'java',

      'text/x-html-template' => 'rhtml',

      'text/x-perl' => 'pl,pm',

      'text/x-php' => 'php,php3,php4,php5',

      'text/x-python' => 'py',

      'text/x-ruby' => 'rb,rbw,ruby,rake,erb',

      'text/x-csh' => 'csh',

      'text/x-sh' => 'sh',

      'text/xml' => 'xml,xsd,mxml',

      'text/yaml' => 'yml,yaml',

      'text/csv' => 'csv',

      'text/x-po' => 'po',

      'image/gif' => 'gif',

      'image/jpeg' => 'jpg,jpeg,jpe',

      'image/png' => 'png',

      'image/tiff' => 'tiff,tif',

      'image/x-ms-bmp' => 'bmp',

      'application/javascript' => 'js',

      'application/pdf' => 'pdf',

    }.freeze

    EXTENSIONS = MIME_TYPES.inject({}) do |map, (type, exts)|

      exts.split(',').each {|ext| map[ext.strip] = type}

      map

    end

    # returns mime type for name or nil if unknown

    def self.of(name)

      return nil unless name.present?

      if m = name.to_s.match(/(^|\.)([^\.]+)$/)

        extension = m[2].downcase

        @known_types ||= Hash.new do |h, ext|

          type = EXTENSIONS[ext]

          type ||= MIME::Types.type_for(ext).first.to_s.presence

          h[ext] = type

        end

        @known_types[extension]

      end

    end

    # Returns the css class associated to

    # the mime type of name

    def self.css_class_of(name)

      mime = of(name)

      mime && mime.gsub('/', '-')

    end

    def self.main_mimetype_of(name)

      mimetype = of(name)

      mimetype.split('/').first if mimetype

    end

    # return true if mime-type for name is type/*

    # otherwise false

    def self.is_type?(type, name)

      main_mimetype = main_mimetype_of(name)

      type.to_s == main_mimetype

    end

  end

end