1 |
|
2 |
|
3 |
|
4 |
|
5 | "use strict";
|
6 |
|
7 | const DescriptionFileUtils = require("./DescriptionFileUtils");
|
8 | const getInnerRequest = require("./getInnerRequest");
|
9 |
|
10 | module.exports = class AliasFieldPlugin {
|
11 | constructor(source, field, target) {
|
12 | this.source = source;
|
13 | this.field = field;
|
14 | this.target = target;
|
15 | }
|
16 |
|
17 | apply(resolver) {
|
18 | const target = resolver.ensureHook(this.target);
|
19 | resolver.getHook(this.source).tapAsync("AliasFieldPlugin", (request, resolveContext, callback) => {
|
20 | if(!request.descriptionFileData) return callback();
|
21 | const innerRequest = getInnerRequest(resolver, request);
|
22 | if(!innerRequest) return callback();
|
23 | const fieldData = DescriptionFileUtils.getField(request.descriptionFileData, this.field);
|
24 | if(typeof fieldData !== "object") {
|
25 | if(resolveContext.log) resolveContext.log("Field '" + this.field + "' doesn't contain a valid alias configuration");
|
26 | return callback();
|
27 | }
|
28 | const data1 = fieldData[innerRequest];
|
29 | const data2 = fieldData[innerRequest.replace(/^\.\//, "")];
|
30 | const data = typeof data1 !== "undefined" ? data1 : data2;
|
31 | if(data === innerRequest) return callback();
|
32 | if(data === undefined) return callback();
|
33 | if(data === false) {
|
34 | const ignoreObj = Object.assign({}, request, {
|
35 | path: false
|
36 | });
|
37 | return callback(null, ignoreObj);
|
38 | }
|
39 | const obj = Object.assign({}, request, {
|
40 | path: request.descriptionFileRoot,
|
41 | request: data
|
42 | });
|
43 | resolver.doResolve(target, obj, "aliased from description file " + request.descriptionFilePath + " with mapping '" + innerRequest + "' to '" + data + "'", resolveContext, (err, result) => {
|
44 | if(err) return callback(err);
|
45 |
|
46 |
|
47 | if(result === undefined) return callback(null, null);
|
48 | callback(null, result);
|
49 | });
|
50 | });
|
51 | }
|
52 | };
|