switch to vuepress

1 files changed, 79 insertions, 0 deletions

diff --git a/node_modules/workbox-build/src/lib/modify-url-prefix-transform.js b/node_modules/workbox-build/src/lib/modify-url-prefix-transform.js
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+++ b/node_modules/workbox-build/src/lib/modify-url-prefix-transform.js
@@ -0,0 +1,79 @@
+/*
+  Copyright 2017 Google Inc.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+      https://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+const errors = require('./errors');
+
+/**
+ * Escaping user input to be treated as a literal string within a regular
+ * expression can be accomplished by simple replacement.
+ *
+ * From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
+ *
+ * @private
+ * @param  {string} string The string to be used as part of a regular
+ *                         expression
+ * @return {string}        A string that is safe to use in a regular
+ *                         expression.
+ *
+ * @private
+ */
+const escapeRegExp = (string) => {
+  return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+};
+
+module.exports = (modifyUrlPrefix) => {
+  if (!modifyUrlPrefix ||
+      typeof modifyUrlPrefix !== 'object' ||
+      Array.isArray(modifyUrlPrefix)) {
+    throw new Error(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 (entry) => entry;
+  }
+
+  Object.keys(modifyUrlPrefix).forEach((key) => {
+    if (typeof modifyUrlPrefix[key] !== 'string') {
+      throw new Error(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(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['manifest-entry-bad-url']);
+      }
+
+      entry.url = entry.url.replace(modifyRegex, (match) => {
+        return modifyUrlPrefix[match];
+      });
+
+      return entry;
+    });
+
+    return {manifest};
+  };
+};