oppi.li
forked from
jollywhoppers.com/witchsky.app
Bluesky app fork with some witchin' additions 馃挮
1import {type AppBskyFeedDefs, AppBskyFeedPost} from '@atproto/api'
2import * as bcp47Match from 'bcp-47-match'
3import lande from 'lande'
4
5import {hasProp} from '#/lib/type-guards'
6import {
7 AppLanguage,
8 type Language,
9 LANGUAGES_MAP_CODE2,
10 LANGUAGES_MAP_CODE3,
11} from './languages'
12
13export function code2ToCode3(lang: string): string {
14 if (lang.length === 2) {
15 return LANGUAGES_MAP_CODE2[lang]?.code3 || lang
16 }
17 return lang
18}
19
20export function code3ToCode2(lang: string): string {
21 if (lang.length === 3) {
22 return LANGUAGES_MAP_CODE3[lang]?.code2 || lang
23 }
24 return lang
25}
26
27export function code3ToCode2Strict(lang: string): string | undefined {
28 if (lang.length === 3) {
29 return LANGUAGES_MAP_CODE3[lang]?.code2
30 }
31
32 return undefined
33}
34
35function getLocalizedLanguage(
36 langCode: string,
37 appLang: string,
38): string | undefined {
39 try {
40 const allNames = new Intl.DisplayNames([appLang], {
41 type: 'language',
42 fallback: 'none',
43 languageDisplay: 'standard',
44 })
45 const translatedName = allNames.of(langCode)
46
47 if (translatedName) {
48 return translatedName
49 }
50 } catch (e) {
51 // ignore RangeError from Intl.DisplayNames APIs
52 if (!(e instanceof RangeError)) {
53 throw e
54 }
55 }
56}
57
58export function languageName(language: Language, appLang: string): string {
59 // if Intl.DisplayNames is unavailable on the target, display the English name
60 if (!(Intl as any).DisplayNames) {
61 return language.name
62 }
63
64 return getLocalizedLanguage(language.code2, appLang) || language.name
65}
66
67export function codeToLanguageName(lang2or3: string, appLang: string): string {
68 const code2 = code3ToCode2(lang2or3)
69 const knownLanguage = LANGUAGES_MAP_CODE2[code2]
70
71 return knownLanguage ? languageName(knownLanguage, appLang) : code2
72}
73
74export function getPostLanguage(
75 post: AppBskyFeedDefs.PostView,
76): string | undefined {
77 let candidates: string[] = []
78 let postText: string = ''
79 if (hasProp(post.record, 'text') && typeof post.record.text === 'string') {
80 postText = post.record.text
81 }
82
83 if (
84 AppBskyFeedPost.isRecord(post.record) &&
85 hasProp(post.record, 'langs') &&
86 Array.isArray(post.record.langs)
87 ) {
88 candidates = post.record.langs
89 }
90
91 // if there's only one declared language, use that
92 if (candidates?.length === 1) {
93 return candidates[0]
94 }
95
96 // no text? can't determine
97 if (postText.trim().length === 0) {
98 return undefined
99 }
100
101 // run the language model
102 let langsProbabilityMap = lande(postText)
103
104 // filter down using declared languages
105 if (candidates?.length) {
106 langsProbabilityMap = langsProbabilityMap.filter(
107 ([lang, _probability]: [string, number]) => {
108 return candidates.includes(code3ToCode2(lang))
109 },
110 )
111 }
112
113 if (langsProbabilityMap[0]) {
114 return code3ToCode2(langsProbabilityMap[0][0])
115 }
116}
117
118export function isPostInLanguage(
119 post: AppBskyFeedDefs.PostView,
120 targetLangs: string[],
121): boolean {
122 const lang = getPostLanguage(post)
123 if (!lang) {
124 // the post has no text, so we just say "yes" for now
125 return true
126 }
127 return bcp47Match.basicFilter(lang, targetLangs).length > 0
128}
129
130export function getTranslatorLink(text: string, lang: string): string {
131 return `https://translate.google.com/?sl=auto&tl=${lang}&text=${encodeURIComponent(
132 text,
133 )}`
134}
135
136/**
137 * Returns a valid `appLanguage` value from an arbitrary string.
138 *
139 * Context: post-refactor, we populated some user's `appLanguage` setting with
140 * `postLanguage`, which can be a comma-separated list of values. This breaks
141 * `appLanguage` handling in the app, so we introduced this util to parse out a
142 * valid `appLanguage` from the pre-populated `postLanguage` values.
143 *
144 * The `appLanguage` will continue to be incorrect until the user returns to
145 * language settings and selects a new option, at which point we'll re-save
146 * their choice, which should then be a valid option. Since we don't know when
147 * this will happen, we should leave this here until we feel it's safe to
148 * remove, or we re-migrate their storage.
149 */
150export function sanitizeAppLanguageSetting(appLanguage: string): AppLanguage {
151 const langs = appLanguage.split(',').filter(Boolean)
152
153 for (const lang of langs) {
154 switch (fixLegacyLanguageCode(lang)) {
155 case 'en':
156 return AppLanguage.en
157 case 'an':
158 return AppLanguage.an
159 case 'ast':
160 return AppLanguage.ast
161 case 'ca':
162 return AppLanguage.ca
163 case 'cy':
164 return AppLanguage.cy
165 case 'da':
166 return AppLanguage.da
167 case 'de':
168 return AppLanguage.de
169 case 'el':
170 return AppLanguage.el
171 case 'en-GB':
172 return AppLanguage.en_GB
173 case 'eo':
174 return AppLanguage.eo
175 case 'es':
176 return AppLanguage.es
177 case 'eu':
178 return AppLanguage.eu
179 case 'fi':
180 return AppLanguage.fi
181 case 'fr':
182 return AppLanguage.fr
183 case 'fy':
184 return AppLanguage.fy
185 case 'ga':
186 return AppLanguage.ga
187 case 'gd':
188 return AppLanguage.gd
189 case 'gl':
190 return AppLanguage.gl
191 case 'hi':
192 return AppLanguage.hi
193 case 'hu':
194 return AppLanguage.hu
195 case 'ia':
196 return AppLanguage.ia
197 case 'id':
198 return AppLanguage.id
199 case 'it':
200 return AppLanguage.it
201 case 'ja':
202 return AppLanguage.ja
203 case 'km':
204 return AppLanguage.km
205 case 'ko':
206 return AppLanguage.ko
207 case 'ne':
208 return AppLanguage.ne
209 case 'nl':
210 return AppLanguage.nl
211 case 'pl':
212 return AppLanguage.pl
213 case 'pt-BR':
214 return AppLanguage.pt_BR
215 case 'pt-PT':
216 return AppLanguage.pt_PT
217 case 'ro':
218 return AppLanguage.ro
219 case 'ru':
220 return AppLanguage.ru
221 case 'sv':
222 return AppLanguage.sv
223 case 'th':
224 return AppLanguage.th
225 case 'tr':
226 return AppLanguage.tr
227 case 'uk':
228 return AppLanguage.uk
229 case 'vi':
230 return AppLanguage.vi
231 case 'zh-Hans-CN':
232 return AppLanguage.zh_CN
233 case 'zh-Hant-HK':
234 return AppLanguage.zh_HK
235 case 'zh-Hant-TW':
236 return AppLanguage.zh_TW
237 default:
238 continue
239 }
240 }
241 return AppLanguage.en
242}
243
244/**
245 * Handles legacy migration for Java devices.
246 *
247 * {@link https://github.com/bluesky-social/social-app/pull/4461}
248 * {@link https://xml.coverpages.org/iso639a.html}
249 */
250export function fixLegacyLanguageCode(code: string | null): string | null {
251 if (code === 'in') {
252 // indonesian
253 return 'id'
254 }
255 if (code === 'iw') {
256 // hebrew
257 return 'he'
258 }
259 if (code === 'ji') {
260 // yiddish
261 return 'yi'
262 }
263 return code
264}
265
266/**
267 * Find the first language supported by our translation infra. Values should be
268 * in order of preference, and match the values of {@link AppLanguage}.
269 *
270 * If no match, returns `en`.
271 */
272export function findSupportedAppLanguage(languageTags: (string | undefined)[]) {
273 const supported = new Set(Object.values(AppLanguage))
274 for (const tag of languageTags) {
275 if (!tag) continue
276 if (supported.has(tag as AppLanguage)) {
277 return tag
278 }
279 }
280 return AppLanguage.en
281}