/
collate.go
196 lines (188 loc) · 7.95 KB
/
collate.go
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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
package collate
import (
"sort"
"strings"
"github.com/tidwall/gjson"
"golang.org/x/text/collate"
"golang.org/x/text/language"
)
// SupportedLangs returns all of the languages that Index() supports.
func SupportedLangs() []string {
var langs []string
for _, tag := range langMap {
langs = append(langs, tag.name)
}
sort.Strings(langs)
return langs
}
// IndexString returns a Less function that can be used to compare if
// string "a" is less than string "b".
// The "name" parameter should be a valid collate definition.
//
// Examples of collation names
// --------------------------------------------------------------------
// ENGLISH, EN -- English
// AMERICANENGLISH, EN-US -- English US
// FRENCH, FR -- French
// CHINESE, ZH -- Chinese
// SIMPLIFIEDCHINESE, ZH-HANS -- Simplified Chinese
// ...
//
// Case insensitive: add the CI tag to the name
// --------------------------------------------------------------------
// ENGLISH_CI
// FR_CI
// ZH-HANS_CI
// ...
//
// Case sensitive: add the CS tag to the name
// --------------------------------------------------------------------
// ENGLISH_CS
// FR_CS
// ZH-HANS_CS
// ...
//
// For numerics: add the NUM tag to the name
// Specifies that numbers should sort numerically ("2" < "12")
// --------------------------------------------------------------------
// DUTCH_NUM
// JAPANESE_NUM
// ...
//
// For loosness: add the LOOSE tag to the name
// Ignores diacritics, case and weight
// --------------------------------------------------------------------
// JA_LOOSE
// CHINESE_LOOSE
// ...
//
func IndexString(name string) (less func(a, b string) bool) {
t, opts := parseCollation(name)
c := collate.New(t, opts...)
return func(a, b string) bool {
return c.CompareString(a, b) == -1
}
}
// IndexJSON is like IndexString expect for json.
// The "name" parameter should be a valid collate definition.
// The "path" parameter should be a valid gjson path.
func IndexJSON(name, path string) (less func(a, b string) bool) {
t, opts := parseCollation(name)
c := collate.New(t, opts...)
return func(a, b string) bool {
ra := gjson.Get(a, path)
rb := gjson.Get(b, path)
if ra.Type == gjson.String || rb.Type == gjson.String {
return c.CompareString(ra.String(), rb.String()) < 0
}
return ra.Less(rb, false)
}
}
func parseCollation(s string) (tag language.Tag, opts []collate.Option) {
parts := strings.Split(s, "_")
if lt, ok := langMap[strings.ToLower(parts[0])]; ok {
tag = lt.tag
} else {
tag = language.Make(parts[0])
}
if tag == language.Und {
tag = language.English
}
opts = append(opts, collate.OptionsFromTag(tag))
for i := 1; i < len(parts); i++ {
switch strings.ToLower(parts[i]) {
case "ci":
opts = append(opts, collate.IgnoreCase)
case "num":
opts = append(opts, collate.Numeric)
case "loose":
opts = append(opts, collate.Loose)
}
}
return tag, opts
}
type tlang struct {
name string
tag language.Tag
}
var langMap = map[string]tlang{
"afrikaans": tlang{"Afrikaans", language.Afrikaans},
"amharic": tlang{"Amharic", language.Amharic},
"arabic": tlang{"Arabic", language.Arabic},
"modernstandardarabic": tlang{"ModernStandardArabic", language.ModernStandardArabic},
"azerbaijani": tlang{"Azerbaijani", language.Azerbaijani},
"bulgarian": tlang{"Bulgarian", language.Bulgarian},
"bengali": tlang{"Bengali", language.Bengali},
"catalan": tlang{"Catalan", language.Catalan},
"czech": tlang{"Czech", language.Czech},
"danish": tlang{"Danish", language.Danish},
"german": tlang{"German", language.German},
"greek": tlang{"Greek", language.Greek},
"english": tlang{"English", language.English},
"americanenglish": tlang{"AmericanEnglish", language.AmericanEnglish},
"britishenglish": tlang{"BritishEnglish", language.BritishEnglish},
"spanish": tlang{"Spanish", language.Spanish},
"europeanspanish": tlang{"EuropeanSpanish", language.EuropeanSpanish},
"latinamericanspanish": tlang{"LatinAmericanSpanish", language.LatinAmericanSpanish},
"estonian": tlang{"Estonian", language.Estonian},
"persian": tlang{"Persian", language.Persian},
"finnish": tlang{"Finnish", language.Finnish},
"filipino": tlang{"Filipino", language.Filipino},
"french": tlang{"French", language.French},
"canadianfrench": tlang{"CanadianFrench", language.CanadianFrench},
"gujarati": tlang{"Gujarati", language.Gujarati},
"hebrew": tlang{"Hebrew", language.Hebrew},
"hindi": tlang{"Hindi", language.Hindi},
"croatian": tlang{"Croatian", language.Croatian},
"hungarian": tlang{"Hungarian", language.Hungarian},
"armenian": tlang{"Armenian", language.Armenian},
"indonesian": tlang{"Indonesian", language.Indonesian},
"icelandic": tlang{"Icelandic", language.Icelandic},
"italian": tlang{"Italian", language.Italian},
"japanese": tlang{"Japanese", language.Japanese},
"georgian": tlang{"Georgian", language.Georgian},
"kazakh": tlang{"Kazakh", language.Kazakh},
"khmer": tlang{"Khmer", language.Khmer},
"kannada": tlang{"Kannada", language.Kannada},
"korean": tlang{"Korean", language.Korean},
"kirghiz": tlang{"Kirghiz", language.Kirghiz},
"lao": tlang{"Lao", language.Lao},
"lithuanian": tlang{"Lithuanian", language.Lithuanian},
"latvian": tlang{"Latvian", language.Latvian},
"macedonian": tlang{"Macedonian", language.Macedonian},
"malayalam": tlang{"Malayalam", language.Malayalam},
"mongolian": tlang{"Mongolian", language.Mongolian},
"marathi": tlang{"Marathi", language.Marathi},
"malay": tlang{"Malay", language.Malay},
"burmese": tlang{"Burmese", language.Burmese},
"nepali": tlang{"Nepali", language.Nepali},
"dutch": tlang{"Dutch", language.Dutch},
"norwegian": tlang{"Norwegian", language.Norwegian},
"punjabi": tlang{"Punjabi", language.Punjabi},
"polish": tlang{"Polish", language.Polish},
"portuguese": tlang{"Portuguese", language.Portuguese},
"brazilianportuguese": tlang{"BrazilianPortuguese", language.BrazilianPortuguese},
"europeanportuguese": tlang{"EuropeanPortuguese", language.EuropeanPortuguese},
"romanian": tlang{"Romanian", language.Romanian},
"russian": tlang{"Russian", language.Russian},
"sinhala": tlang{"Sinhala", language.Sinhala},
"slovak": tlang{"Slovak", language.Slovak},
"slovenian": tlang{"Slovenian", language.Slovenian},
"albanian": tlang{"Albanian", language.Albanian},
"serbian": tlang{"Serbian", language.Serbian},
"serbianlatin": tlang{"SerbianLatin", language.SerbianLatin},
"swedish": tlang{"Swedish", language.Swedish},
"swahili": tlang{"Swahili", language.Swahili},
"tamil": tlang{"Tamil", language.Tamil},
"telugu": tlang{"Telugu", language.Telugu},
"thai": tlang{"Thai", language.Thai},
"turkish": tlang{"Turkish", language.Turkish},
"ukrainian": tlang{"Ukrainian", language.Ukrainian},
"urdu": tlang{"Urdu", language.Urdu},
"uzbek": tlang{"Uzbek", language.Uzbek},
"vietnamese": tlang{"Vietnamese", language.Vietnamese},
"chinese": tlang{"Chinese", language.Chinese},
"simplifiedchinese": tlang{"SimplifiedChinese", language.SimplifiedChinese},
"traditionalchinese": tlang{"TraditionalChinese", language.TraditionalChinese},
"zulu": tlang{"Zulu", language.Zulu},
}