"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 = require("@babel/types");
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const {
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blockStatement,
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cloneNode,
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emptyStatement,
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expressionStatement,
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identifier,
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isStatement,
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isStringLiteral,
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stringLiteral,
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validate
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} = _t;
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function populatePlaceholders(metadata, replacements) {
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const ast = 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 => cloneNode(node));
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} else if (typeof replacement === "object") {
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replacement = 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 = stringLiteral(replacement);
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}
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if (!replacement || !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 = emptyStatement();
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} else if (Array.isArray(replacement)) {
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replacement = blockStatement(replacement);
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} else if (typeof replacement === "string") {
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replacement = expressionStatement(identifier(replacement));
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} else if (!isStatement(replacement)) {
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replacement = 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 = identifier(replacement);
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}
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if (!isStatement(replacement)) {
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replacement = 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 = 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 = 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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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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validate(parent, key, items);
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parent[key] = items;
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}
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}
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//# sourceMappingURL=populate.js.map
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