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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
require 'active_support/core_ext/array/prepend_and_append'
module ActiveSupport
module Inflector
# A singleton instance of this class is yielded by Inflector.inflections, which can then be used to specify additional
# inflection rules. Examples:
#
# ActiveSupport::Inflector.inflections do |inflect|
# inflect.plural /^(ox)$/i, '\1\2en'
# inflect.singular /^(ox)en/i, '\1'
#
# inflect.irregular 'octopus', 'octopi'
#
# inflect.uncountable "equipment"
# end
#
# New rules are added at the top. So in the example above, the irregular rule for octopus will now be the first of the
# pluralization and singularization rules that is runs. This guarantees that your rules run before any of the rules that may
# already have been loaded.
class Inflections
def self.instance
@__instance__ ||= new
end
attr_reader :plurals, :singulars, :uncountables, :humans, :acronyms, :acronym_regex
def initialize
@plurals, @singulars, @uncountables, @humans, @acronyms, @acronym_regex = [], [], [], [], {}, /(?=a)b/
end
# Specifies a new acronym. An acronym must be specified as it will appear in a camelized string. An underscore
# string that contains the acronym will retain the acronym when passed to `camelize`, `humanize`, or `titleize`.
# A camelized string that contains the acronym will maintain the acronym when titleized or humanized, and will
# convert the acronym into a non-delimited single lowercase word when passed to +underscore+.
#
# Examples:
# acronym 'HTML'
# titleize 'html' #=> 'HTML'
# camelize 'html' #=> 'HTML'
# underscore 'MyHTML' #=> 'my_html'
#
# The acronym, however, must occur as a delimited unit and not be part of another word for conversions to recognize it:
#
# acronym 'HTTP'
# camelize 'my_http_delimited' #=> 'MyHTTPDelimited'
# camelize 'https' #=> 'Https', not 'HTTPs'
# underscore 'HTTPS' #=> 'http_s', not 'https'
#
# acronym 'HTTPS'
# camelize 'https' #=> 'HTTPS'
# underscore 'HTTPS' #=> 'https'
#
# Note: Acronyms that are passed to `pluralize` will no longer be recognized, since the acronym will not occur as
# a delimited unit in the pluralized result. To work around this, you must specify the pluralized form as an
# acronym as well:
#
# acronym 'API'
# camelize(pluralize('api')) #=> 'Apis'
#
# acronym 'APIs'
# camelize(pluralize('api')) #=> 'APIs'
#
# `acronym` may be used to specify any word that contains an acronym or otherwise needs to maintain a non-standard
# capitalization. The only restriction is that the word must begin with a capital letter.
#
# Examples:
# acronym 'RESTful'
# underscore 'RESTful' #=> 'restful'
# underscore 'RESTfulController' #=> 'restful_controller'
# titleize 'RESTfulController' #=> 'RESTful Controller'
# camelize 'restful' #=> 'RESTful'
# camelize 'restful_controller' #=> 'RESTfulController'
#
# acronym 'McDonald'
# underscore 'McDonald' #=> 'mcdonald'
# camelize 'mcdonald' #=> 'McDonald'
def acronym(word)
@acronyms[word.downcase] = word
@acronym_regex = /#{@acronyms.values.join("|")}/
end
# Specifies a new pluralization rule and its replacement. The rule can either be a string or a regular expression.
# The replacement should always be a string that may include references to the matched data from the rule.
def plural(rule, replacement)
@uncountables.delete(rule) if rule.is_a?(String)
@uncountables.delete(replacement)
@plurals.prepend([rule, replacement])
end
# Specifies a new singularization rule and its replacement. The rule can either be a string or a regular expression.
# The replacement should always be a string that may include references to the matched data from the rule.
def singular(rule, replacement)
@uncountables.delete(rule) if rule.is_a?(String)
@uncountables.delete(replacement)
@singulars.prepend([rule, replacement])
end
# Specifies a new irregular that applies to both pluralization and singularization at the same time. This can only be used
# for strings, not regular expressions. You simply pass the irregular in singular and plural form.
#
# Examples:
# irregular 'octopus', 'octopi'
# irregular 'person', 'people'
def irregular(singular, plural)
@uncountables.delete(singular)
@uncountables.delete(plural)
if singular[0,1].upcase == plural[0,1].upcase
plural(Regexp.new("(#{singular[0,1]})#{singular[1..-1]}$", "i"), '\1' + plural[1..-1])
plural(Regexp.new("(#{plural[0,1]})#{plural[1..-1]}$", "i"), '\1' + plural[1..-1])
singular(Regexp.new("(#{plural[0,1]})#{plural[1..-1]}$", "i"), '\1' + singular[1..-1])
else
plural(Regexp.new("#{singular[0,1].upcase}(?i)#{singular[1..-1]}$"), plural[0,1].upcase + plural[1..-1])
plural(Regexp.new("#{singular[0,1].downcase}(?i)#{singular[1..-1]}$"), plural[0,1].downcase + plural[1..-1])
plural(Regexp.new("#{plural[0,1].upcase}(?i)#{plural[1..-1]}$"), plural[0,1].upcase + plural[1..-1])
plural(Regexp.new("#{plural[0,1].downcase}(?i)#{plural[1..-1]}$"), plural[0,1].downcase + plural[1..-1])
singular(Regexp.new("#{plural[0,1].upcase}(?i)#{plural[1..-1]}$"), singular[0,1].upcase + singular[1..-1])
singular(Regexp.new("#{plural[0,1].downcase}(?i)#{plural[1..-1]}$"), singular[0,1].downcase + singular[1..-1])
end
end
# Add uncountable words that shouldn't be attempted inflected.
#
# Examples:
# uncountable "money"
# uncountable "money", "information"
# uncountable %w( money information rice )
def uncountable(*words)
(@uncountables << words).flatten!
end
# Specifies a humanized form of a string by a regular expression rule or by a string mapping.
# When using a regular expression based replacement, the normal humanize formatting is called after the replacement.
# When a string is used, the human form should be specified as desired (example: 'The name', not 'the_name')
#
# Examples:
# human /_cnt$/i, '\1_count'
# human "legacy_col_person_name", "Name"
def human(rule, replacement)
@humans.prepend([rule, replacement])
end
# Clears the loaded inflections within a given scope (default is <tt>:all</tt>).
# Give the scope as a symbol of the inflection type, the options are: <tt>:plurals</tt>,
# <tt>:singulars</tt>, <tt>:uncountables</tt>, <tt>:humans</tt>.
#
# Examples:
# clear :all
# clear :plurals
def clear(scope = :all)
case scope
when :all
@plurals, @singulars, @uncountables, @humans = [], [], [], []
else
instance_variable_set "@#{scope}", []
end
end
end
# Yields a singleton instance of Inflector::Inflections so you can specify additional
# inflector rules.
#
# Example:
# ActiveSupport::Inflector.inflections do |inflect|
# inflect.uncountable "rails"
# end
def inflections
if block_given?
yield Inflections.instance
else
Inflections.instance
end
end
end
end
|