/
index.js
154 lines (134 loc) · 5.61 KB
/
index.js
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
import { makePromise } from './utils.js'
import request from './request.js'
const getDefaults = () => {
return {
loadPath: '/locales/{{lng}}/{{ns}}.json',
addPath: '/locales/add/{{lng}}/{{ns}}',
parse: data => JSON.parse(data),
stringify: JSON.stringify,
parsePayload: (namespace, key, fallbackValue) => ({ [key]: fallbackValue || '' }),
parseLoadPayload: (languages, namespaces) => undefined,
request,
reloadInterval: typeof window !== 'undefined' ? false : 60 * 60 * 1000,
customHeaders: {},
queryStringParams: {},
crossDomain: false, // used for XmlHttpRequest
withCredentials: false, // used for XmlHttpRequest
overrideMimeType: false, // used for XmlHttpRequest
requestOptions: { // used for fetch
mode: 'cors',
credentials: 'same-origin',
cache: 'default'
}
}
}
class Backend {
constructor (services, options = {}, allOptions = {}) {
this.services = services
this.options = options
this.allOptions = allOptions
this.type = 'backend'
this.init(services, options, allOptions)
}
init (services, options = {}, allOptions = {}) {
this.services = services
this.options = { ...getDefaults(), ...(this.options || {}), ...options }
this.allOptions = allOptions
if (this.services && this.options.reloadInterval) {
const timer = setInterval(() => this.reload(), this.options.reloadInterval)
if (typeof timer === 'object' && typeof timer.unref === 'function') timer.unref()
}
}
readMulti (languages, namespaces, callback) {
this._readAny(languages, languages, namespaces, namespaces, callback)
}
read (language, namespace, callback) {
this._readAny([language], language, [namespace], namespace, callback)
}
_readAny (languages, loadUrlLanguages, namespaces, loadUrlNamespaces, callback) {
let loadPath = this.options.loadPath
if (typeof this.options.loadPath === 'function') {
loadPath = this.options.loadPath(languages, namespaces)
}
loadPath = makePromise(loadPath)
loadPath.then(resolvedLoadPath => {
if (!resolvedLoadPath) return callback(null, {})
const url = this.services.interpolator.interpolate(resolvedLoadPath, { lng: languages.join('+'), ns: namespaces.join('+') })
this.loadUrl(url, callback, loadUrlLanguages, loadUrlNamespaces)
})
}
loadUrl (url, callback, languages, namespaces) {
const lng = (typeof languages === 'string') ? [languages] : languages
const ns = (typeof namespaces === 'string') ? [namespaces] : namespaces
// parseLoadPayload — default undefined
const payload = this.options.parseLoadPayload(lng, ns)
this.options.request(this.options, url, payload, (err, res) => {
if (res && ((res.status >= 500 && res.status < 600) || !res.status)) return callback('failed loading ' + url + '; status code: ' + res.status, true /* retry */)
if (res && res.status >= 400 && res.status < 500) return callback('failed loading ' + url + '; status code: ' + res.status, false /* no retry */)
if (!res && err && err.message && err.message.indexOf('Failed to fetch') > -1) return callback('failed loading ' + url + ': ' + err.message, true /* retry */)
if (err) return callback(err, false)
let ret, parseErr
try {
if (typeof res.data === 'string') {
ret = this.options.parse(res.data, languages, namespaces)
} else { // fallback, which omits calling the parse function
ret = res.data
}
} catch (e) {
parseErr = 'failed parsing ' + url + ' to json'
}
if (parseErr) return callback(parseErr, false)
callback(null, ret)
})
}
create (languages, namespace, key, fallbackValue, callback) {
// If there is a falsey addPath, then abort -- this has been disabled.
if (!this.options.addPath) return
if (typeof languages === 'string') languages = [languages]
const payload = this.options.parsePayload(namespace, key, fallbackValue)
let finished = 0
const dataArray = []
const resArray = []
languages.forEach(lng => {
let addPath = this.options.addPath
if (typeof this.options.addPath === 'function') {
addPath = this.options.addPath(lng, namespace)
}
const url = this.services.interpolator.interpolate(addPath, { lng, ns: namespace })
this.options.request(this.options, url, payload, (data, res) => {
// TODO: if res.status === 4xx do log
finished += 1
dataArray.push(data)
resArray.push(res)
if (finished === languages.length) {
if (typeof callback === 'function') callback(dataArray, resArray)
}
})
})
}
reload () {
const { backendConnector, languageUtils, logger } = this.services
const currentLanguage = backendConnector.language
if (currentLanguage && currentLanguage.toLowerCase() === 'cimode') return // avoid loading resources for cimode
const toLoad = []
const append = (lng) => {
const lngs = languageUtils.toResolveHierarchy(lng)
lngs.forEach(l => {
if (toLoad.indexOf(l) < 0) toLoad.push(l)
})
}
append(currentLanguage)
if (this.allOptions.preload) this.allOptions.preload.forEach((l) => append(l))
toLoad.forEach(lng => {
this.allOptions.ns.forEach(ns => {
backendConnector.read(lng, ns, 'read', null, null, (err, data) => {
if (err) logger.warn(`loading namespace ${ns} for language ${lng} failed`, err)
if (!err && data) logger.log(`loaded namespace ${ns} for language ${lng}`, data)
backendConnector.loaded(`${lng}|${ns}`, err, data)
})
})
})
}
}
Backend.type = 'backend'
export default Backend