hexo/node_modules/workbox-build/build/lib/modify-url-prefix-transform.js

52 lines
2.1 KiB
JavaScript

"use strict";
/*
Copyright 2018 Google LLC
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.modifyURLPrefixTransform = void 0;
const errors_1 = require("./errors");
const escape_regexp_1 = require("./escape-regexp");
function modifyURLPrefixTransform(modifyURLPrefix) {
if (!modifyURLPrefix ||
typeof modifyURLPrefix !== 'object' ||
Array.isArray(modifyURLPrefix)) {
throw new Error(errors_1.errors['modify-url-prefix-bad-prefixes']);
}
// If there are no entries in modifyURLPrefix, just return an identity
// function as a shortcut.
if (Object.keys(modifyURLPrefix).length === 0) {
return (manifest) => {
return { manifest };
};
}
for (const key of Object.keys(modifyURLPrefix)) {
if (typeof modifyURLPrefix[key] !== 'string') {
throw new Error(errors_1.errors['modify-url-prefix-bad-prefixes']);
}
}
// Escape the user input so it's safe to use in a regex.
const safeModifyURLPrefixes = Object.keys(modifyURLPrefix).map(escape_regexp_1.escapeRegExp);
// Join all the `modifyURLPrefix` keys so a single regex can be used.
const prefixMatchesStrings = safeModifyURLPrefixes.join('|');
// Add `^` to the front the prefix matches so it only matches the start of
// a string.
const modifyRegex = new RegExp(`^(${prefixMatchesStrings})`);
return (originalManifest) => {
const manifest = originalManifest.map((entry) => {
if (typeof entry.url !== 'string') {
throw new Error(errors_1.errors['manifest-entry-bad-url']);
}
entry.url = entry.url.replace(modifyRegex, (match) => {
return modifyURLPrefix[match];
});
return entry;
});
return { manifest };
};
}
exports.modifyURLPrefixTransform = modifyURLPrefixTransform;