source: trip-planner-front/node_modules/@babel/template/lib/populate.js@ 571e0df

Last change on this file since 571e0df was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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Line 
1"use strict";
2
3Object.defineProperty(exports, "__esModule", {
4 value: true
5});
6exports.default = populatePlaceholders;
7
8var t = require("@babel/types");
9
10function populatePlaceholders(metadata, replacements) {
11 const ast = t.cloneNode(metadata.ast);
12
13 if (replacements) {
14 metadata.placeholders.forEach(placeholder => {
15 if (!Object.prototype.hasOwnProperty.call(replacements, placeholder.name)) {
16 const placeholderName = placeholder.name;
17 throw new Error(`Error: No substitution given for "${placeholderName}". If this is not meant to be a
18 placeholder you may want to consider passing one of the following options to @babel/template:
19 - { placeholderPattern: false, placeholderWhitelist: new Set(['${placeholderName}'])}
20 - { placeholderPattern: /^${placeholderName}$/ }`);
21 }
22 });
23 Object.keys(replacements).forEach(key => {
24 if (!metadata.placeholderNames.has(key)) {
25 throw new Error(`Unknown substitution "${key}" given`);
26 }
27 });
28 }
29
30 metadata.placeholders.slice().reverse().forEach(placeholder => {
31 try {
32 applyReplacement(placeholder, ast, replacements && replacements[placeholder.name] || null);
33 } catch (e) {
34 e.message = `@babel/template placeholder "${placeholder.name}": ${e.message}`;
35 throw e;
36 }
37 });
38 return ast;
39}
40
41function applyReplacement(placeholder, ast, replacement) {
42 if (placeholder.isDuplicate) {
43 if (Array.isArray(replacement)) {
44 replacement = replacement.map(node => t.cloneNode(node));
45 } else if (typeof replacement === "object") {
46 replacement = t.cloneNode(replacement);
47 }
48 }
49
50 const {
51 parent,
52 key,
53 index
54 } = placeholder.resolve(ast);
55
56 if (placeholder.type === "string") {
57 if (typeof replacement === "string") {
58 replacement = t.stringLiteral(replacement);
59 }
60
61 if (!replacement || !t.isStringLiteral(replacement)) {
62 throw new Error("Expected string substitution");
63 }
64 } else if (placeholder.type === "statement") {
65 if (index === undefined) {
66 if (!replacement) {
67 replacement = t.emptyStatement();
68 } else if (Array.isArray(replacement)) {
69 replacement = t.blockStatement(replacement);
70 } else if (typeof replacement === "string") {
71 replacement = t.expressionStatement(t.identifier(replacement));
72 } else if (!t.isStatement(replacement)) {
73 replacement = t.expressionStatement(replacement);
74 }
75 } else {
76 if (replacement && !Array.isArray(replacement)) {
77 if (typeof replacement === "string") {
78 replacement = t.identifier(replacement);
79 }
80
81 if (!t.isStatement(replacement)) {
82 replacement = t.expressionStatement(replacement);
83 }
84 }
85 }
86 } else if (placeholder.type === "param") {
87 if (typeof replacement === "string") {
88 replacement = t.identifier(replacement);
89 }
90
91 if (index === undefined) throw new Error("Assertion failure.");
92 } else {
93 if (typeof replacement === "string") {
94 replacement = t.identifier(replacement);
95 }
96
97 if (Array.isArray(replacement)) {
98 throw new Error("Cannot replace single expression with an array.");
99 }
100 }
101
102 if (index === undefined) {
103 t.validate(parent, key, replacement);
104 parent[key] = replacement;
105 } else {
106 const items = parent[key].slice();
107
108 if (placeholder.type === "statement" || placeholder.type === "param") {
109 if (replacement == null) {
110 items.splice(index, 1);
111 } else if (Array.isArray(replacement)) {
112 items.splice(index, 1, ...replacement);
113 } else {
114 items[index] = replacement;
115 }
116 } else {
117 items[index] = replacement;
118 }
119
120 t.validate(parent, key, items);
121 parent[key] = items;
122 }
123}
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