127 lines
4.6 KiB
JavaScript
127 lines
4.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = populatePlaceholders;
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var t = _interopRequireWildcard(require("@babel/types"));
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function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
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function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
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function populatePlaceholders(metadata, replacements) {
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const ast = t.cloneNode(metadata.ast);
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if (replacements) {
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metadata.placeholders.forEach(placeholder => {
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if (!Object.prototype.hasOwnProperty.call(replacements, placeholder.name)) {
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const placeholderName = placeholder.name;
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throw new Error(`Error: No substitution given for "${placeholderName}". If this is not meant to be a
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placeholder you may want to consider passing one of the following options to @babel/template:
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- { placeholderPattern: false, placeholderWhitelist: new Set(['${placeholderName}'])}
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- { placeholderPattern: /^${placeholderName}$/ }`);
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}
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});
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Object.keys(replacements).forEach(key => {
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if (!metadata.placeholderNames.has(key)) {
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throw new Error(`Unknown substitution "${key}" given`);
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}
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});
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}
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metadata.placeholders.slice().reverse().forEach(placeholder => {
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try {
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applyReplacement(placeholder, ast, replacements && replacements[placeholder.name] || null);
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} catch (e) {
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e.message = `@babel/template placeholder "${placeholder.name}": ${e.message}`;
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throw e;
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}
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});
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return ast;
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}
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function applyReplacement(placeholder, ast, replacement) {
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if (placeholder.isDuplicate) {
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if (Array.isArray(replacement)) {
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replacement = replacement.map(node => t.cloneNode(node));
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} else if (typeof replacement === "object") {
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replacement = t.cloneNode(replacement);
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}
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}
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const {
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parent,
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key,
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index
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} = placeholder.resolve(ast);
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if (placeholder.type === "string") {
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if (typeof replacement === "string") {
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replacement = t.stringLiteral(replacement);
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}
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if (!replacement || !t.isStringLiteral(replacement)) {
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throw new Error("Expected string substitution");
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}
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} else if (placeholder.type === "statement") {
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if (index === undefined) {
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if (!replacement) {
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replacement = t.emptyStatement();
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} else if (Array.isArray(replacement)) {
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replacement = t.blockStatement(replacement);
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} else if (typeof replacement === "string") {
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replacement = t.expressionStatement(t.identifier(replacement));
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} else if (!t.isStatement(replacement)) {
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replacement = t.expressionStatement(replacement);
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}
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} else {
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if (replacement && !Array.isArray(replacement)) {
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if (typeof replacement === "string") {
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replacement = t.identifier(replacement);
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}
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if (!t.isStatement(replacement)) {
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replacement = t.expressionStatement(replacement);
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}
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}
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}
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} else if (placeholder.type === "param") {
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if (typeof replacement === "string") {
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replacement = t.identifier(replacement);
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}
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if (index === undefined) throw new Error("Assertion failure.");
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} else {
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if (typeof replacement === "string") {
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replacement = t.identifier(replacement);
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}
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if (Array.isArray(replacement)) {
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throw new Error("Cannot replace single expression with an array.");
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}
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}
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if (index === undefined) {
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t.validate(parent, key, replacement);
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parent[key] = replacement;
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} else {
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const items = parent[key].slice();
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if (placeholder.type === "statement" || placeholder.type === "param") {
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if (replacement == null) {
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items.splice(index, 1);
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} else if (Array.isArray(replacement)) {
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items.splice(index, 1, ...replacement);
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} else {
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items[index] = replacement;
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}
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} else {
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items[index] = replacement;
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}
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t.validate(parent, key, items);
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parent[key] = items;
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}
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} |