-
Notifications
You must be signed in to change notification settings - Fork 93
/
language_codes.rb
75 lines (54 loc) · 2.16 KB
/
language_codes.rb
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
# encoding: UTF-8
# Copyright 2012 Twitter, Inc
# http://www.apache.org/licenses/LICENSE-2.0
module TwitterCldr
module Shared
module LanguageCodes
LANGUAGE_CODES_DUMP_PATH = File.join(TwitterCldr::RESOURCES_DIR, 'shared', 'language_codes_table.dump')
NAME_STANDARD = :name # fake standard, mostly for internal use
VALID_STANDARDS = [:bcp_47, :iso_639_1, :iso_639_2, :iso_639_3, NAME_STANDARD]
class << self
def languages
resource[NAME_STANDARD].keys
end
def valid_standard?(standard)
VALID_STANDARDS.include?(standard.to_sym)
end
def valid_code?(code, standard)
resource[validate_standard(standard)].has_key?(code.to_sym)
end
def convert(code, from_and_to = {})
from, to = extract_from_and_to_options(from_and_to)
resource[from].fetch(code.to_sym, {})[to]
end
def from_language(language, standard)
convert(language, :from => NAME_STANDARD, :to => standard)
end
def to_language(code, standard)
convert(code, :from => standard, :to => NAME_STANDARD).to_s
end
def standards_for(code, standard)
resource[validate_standard(standard)].fetch(code.to_sym, {}).keys - [NAME_STANDARD] # exclude fake NAME_STANDARD standard
end
def standards_for_language(language)
standards_for(language, NAME_STANDARD)
end
private
def resource
@resource ||= File.open(LANGUAGE_CODES_DUMP_PATH) { |file| Marshal.load(file.read) }
end
def extract_from_and_to_options(from_and_to)
TwitterCldr::Utils.deep_symbolize_keys(from_and_to).values_at(:from, :to).map do |standard|
raise ArgumentError, 'options :from and :to are required' if standard.nil?
validate_standard(standard)
end
end
def validate_standard(standard)
raise ArgumentError, "standard can't be nil" if standard.nil?
raise ArgumentError, "#{standard.inspect} is not a valid standard name" unless valid_standard?(standard)
standard.to_sym
end
end
end
end
end