source: trip-planner-front/node_modules/yargs/build/lib/middleware.js@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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1import { argsert } from './argsert.js';
2import { isPromise } from './utils/is-promise.js';
3export class GlobalMiddleware {
4 constructor(yargs) {
5 this.globalMiddleware = [];
6 this.frozens = [];
7 this.yargs = yargs;
8 }
9 addMiddleware(callback, applyBeforeValidation, global = true, mutates = false) {
10 argsert('<array|function> [boolean] [boolean] [boolean]', [callback, applyBeforeValidation, global], arguments.length);
11 if (Array.isArray(callback)) {
12 for (let i = 0; i < callback.length; i++) {
13 if (typeof callback[i] !== 'function') {
14 throw Error('middleware must be a function');
15 }
16 const m = callback[i];
17 m.applyBeforeValidation = applyBeforeValidation;
18 m.global = global;
19 }
20 Array.prototype.push.apply(this.globalMiddleware, callback);
21 }
22 else if (typeof callback === 'function') {
23 const m = callback;
24 m.applyBeforeValidation = applyBeforeValidation;
25 m.global = global;
26 m.mutates = mutates;
27 this.globalMiddleware.push(callback);
28 }
29 return this.yargs;
30 }
31 addCoerceMiddleware(callback, option) {
32 const aliases = this.yargs.getAliases();
33 this.globalMiddleware = this.globalMiddleware.filter(m => {
34 const toCheck = [...(aliases[option] || []), option];
35 if (!m.option)
36 return true;
37 else
38 return !toCheck.includes(m.option);
39 });
40 callback.option = option;
41 return this.addMiddleware(callback, true, true, true);
42 }
43 getMiddleware() {
44 return this.globalMiddleware;
45 }
46 freeze() {
47 this.frozens.push([...this.globalMiddleware]);
48 }
49 unfreeze() {
50 const frozen = this.frozens.pop();
51 if (frozen !== undefined)
52 this.globalMiddleware = frozen;
53 }
54 reset() {
55 this.globalMiddleware = this.globalMiddleware.filter(m => m.global);
56 }
57}
58export function commandMiddlewareFactory(commandMiddleware) {
59 if (!commandMiddleware)
60 return [];
61 return commandMiddleware.map(middleware => {
62 middleware.applyBeforeValidation = false;
63 return middleware;
64 });
65}
66export function applyMiddleware(argv, yargs, middlewares, beforeValidation) {
67 return middlewares.reduce((acc, middleware) => {
68 if (middleware.applyBeforeValidation !== beforeValidation) {
69 return acc;
70 }
71 if (middleware.mutates) {
72 if (middleware.applied)
73 return acc;
74 middleware.applied = true;
75 }
76 if (isPromise(acc)) {
77 return acc
78 .then(initialObj => Promise.all([
79 initialObj,
80 middleware(initialObj, yargs),
81 ]))
82 .then(([initialObj, middlewareObj]) => Object.assign(initialObj, middlewareObj));
83 }
84 else {
85 const result = middleware(acc, yargs);
86 return isPromise(result)
87 ? result.then(middlewareObj => Object.assign(acc, middlewareObj))
88 : Object.assign(acc, result);
89 }
90 }, argv);
91}
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