-
Notifications
You must be signed in to change notification settings - Fork 0
/
buddy.js
185 lines (153 loc) · 4.53 KB
/
buddy.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
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
/**
* __ __ __ __
* _________/ /___ / /_ __ ______/ /___/ /_ __
* / ___/ __ / __ \ / __ \/ / / / __ / __ / / / /
* / /__/ /_/ / / / / / /_/ / /_/ / /_/ / /_/ / /_/ /
* \___/\__,_/_/ /_/ /_.___/\__,_/\__,_/\__,_/\__, /
* /____/
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* https://opensource.org/licenses/ISC
*
* @author Felix Heidecke <[email protected]>
* @copyright Felix Heidecke 2020
*/
import 'promise-polyfill/src/polyfill';
(() => {
let _ns_status = NAMESPACE + '__STATUS'
let _ns_queue = NAMESPACE + '__QUEUE'
let _ns_baseUrl = NAMESPACE + '__BASEURL'
let _ns_paths = NAMESPACE + '__PATHS'
const init = () => {
if (!window || !document) {
console.clear()
console.error('😮 CDN-Buddy only runs in the browser!')
return
}
if (window[NAMESPACE]) {
console.warn('window.' + NAMESPACE, 'is already defined')
return
}
window[NAMESPACE] = {
setConfig,
addPath,
require
}
window[_ns_queue] = []
window[_ns_status] = {}
window[_ns_baseUrl] = ''
window[_ns_paths] = {}
}
const setConfig = config => {
if (typeof config !== 'object')
throw Error('config setter expecting object')
if (config.baseUrl)
window[_ns_baseUrl] = config.baseUrl
if (config.paths)
window[_ns_paths] = config.paths
}
const addPath = paths => {
Object.assign(window[_ns_paths], paths)
}
/**
* Creates a <link> DOM node
*
* @param {string} path full CSS file URI
* @returns {object} HTML element
*/
const _createLinkElement = path => {
let el = document.createElement('link')
el.setAttribute('rel', 'stylesheet')
el.setAttribute('data-cdn-buddy', true)
el.setAttribute('href', path)
return el
}
/**
* Creates a <script> DOM node
*
* @param {string} path full JS file URI
* @returns {object} HTML element
*/
const _createScriptElement = path => {
let el = document.createElement('script')
el.setAttribute('src', path)
el.setAttribute('data-cdn-buddy', true)
return el
}
/**
* Returns the full qualified URI for a given path
*
* @param {string} path paths key, realtive- or absolute URI
* @returns {array}
*/
const _createPath = path => {
const baseUrl = window[_ns_baseUrl]
const paths = window[_ns_paths]
// Absolute URI
if (path.search(/(http(s)?):\/\//) === 0) {
return [path]
}
if (paths[path] && Array.isArray(paths[path])) {
return paths[path].map(path => baseUrl + '/' + ((paths[path]) || path))
}
if (paths[path]) {
return [baseUrl + '/' + paths[path]]
}
return [baseUrl + '/' + path]
}
const _insert = library => {
let path = library
return new Promise((resolve, reject) => {
let el = ''
if (window[_ns_status][path] === 'done') {
resolve()
return
}
if (path.search(/\.js$/) !== -1) {
el = _createScriptElement(path)
document.body.appendChild(el);
}
else if (path.search(/\.css$/) !== -1) {
el = _createLinkElement(path)
document.head.appendChild(el);
}
else {
reject('wrong filetype for', path)
return
}
el.addEventListener('load', () => {
console.info('😎 CDN-Buddy loaded:', path)
window[_ns_status][path] = 'done'
resolve()
});
el.addEventListener('error', error => {
console.info(`😡 CDN-Buddy could not load: ${path}`)
window[_ns_status][path] = 'error'
reject(error)
})
});
}
const require = function() {
let library = (typeof arguments[0] === 'object') ? arguments[0] : [arguments[0]]
let surplus = (arguments.length > 1) ? Object.values(arguments).splice(1) : false
for (let i = 0; i < library.length; i++) {
let _l = _createPath(library[i])
for (let o = 0; o < _l.length; o++) {
let __l = _l[o]
if (!window[_ns_status][__l]) {
window[_ns_status][__l] = 'loading'
window[_ns_queue].push(_insert(__l))
}
}
}
return Promise.all(window[_ns_queue]).then( () => {
if (surplus) {
require(...surplus)
}
});
}
init()
})()