1 files changed, 161 insertions, 0 deletions
diff --git a/devtools/shared/storage/utils.js b/devtools/shared/storage/utils.js
new file mode 100644
index 0000000000..2c31a4ae88
--- /dev/null
+++ b/devtools/shared/storage/utils.js
@@ -0,0 +1,161 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+loader.lazyRequireGetter(
+  this,
+  "validator",
+  "resource://devtools/shared/storage/vendor/stringvalidator/validator.js"
+);
+loader.lazyRequireGetter(
+  this,
+  "JSON5",
+  "resource://devtools/shared/storage/vendor/json5.js"
+);
+
+const MATH_REGEX =
+  /(?:(?:^|[-+_*/])(?:\s*-?\d+(\.\d+)?(?:[eE][+-]?\d+)?\s*))+$/;
+
+/**
+ * Tries to parse a string into an object on the basis of key-value pairs,
+ * separated by various separators. If failed, tries to parse for single
+ * separator separated values to form an array.
+ *
+ * @param {string} value
+ *        The string to be parsed into an object or array
+ */
+function _extractKeyValPairs(value) {
+  const makeObject = (keySep, pairSep) => {
+    const object = {};
+    for (const pair of value.split(pairSep)) {
+      const [key, val] = pair.split(keySep);
+      object[key] = val;
+    }
+    return object;
+  };
+
+  // Possible separators.
+  const separators = ["=", ":", "~", "#", "&", "\\*", ",", "\\."];
+  // Testing for object
+  for (let i = 0; i < separators.length; i++) {
+    const kv = separators[i];
+    for (let j = 0; j < separators.length; j++) {
+      if (i == j) {
+        continue;
+      }
+      const p = separators[j];
+      const word = `[^${kv}${p}]*`;
+      const keyValue = `${word}${kv}${word}`;
+      const keyValueList = `${keyValue}(${p}${keyValue})*`;
+      const regex = new RegExp(`^${keyValueList}$`);
+      if (
+        value.match &&
+        value.match(regex) &&
+        value.includes(kv) &&
+        (value.includes(p) || value.split(kv).length == 2)
+      ) {
+        return makeObject(kv, p);
+      }
+    }
+  }
+  // Testing for array
+  for (const p of separators) {
+    const word = `[^${p}]*`;
+    const wordList = `(${word}${p})+${word}`;
+    const regex = new RegExp(`^${wordList}$`);
+
+    if (regex.test(value)) {
+      const pNoBackslash = p.replace(/\\*/g, "");
+      return value.split(pNoBackslash);
+    }
+  }
+  return null;
+}
+
+/**
+ * Check whether the value string represents something that should be
+ * displayed as text. If so then it shouldn't be parsed into a tree.
+ *
+ * @param  {String} value
+ *         The value to be parsed.
+ */
+function _shouldParse(value) {
+  const validators = [
+    "isBase64",
+    "isBoolean",
+    "isCurrency",
+    "isDataURI",
+    "isEmail",
+    "isFQDN",
+    "isHexColor",
+    "isIP",
+    "isISO8601",
+    "isMACAddress",
+    "isSemVer",
+    "isURL",
+  ];
+
+  // Check for minus calculations e.g. 8-3 because otherwise 5 will be displayed.
+  if (MATH_REGEX.test(value)) {
+    return false;
+  }
+
+  // Check for any other types that shouldn't be parsed.
+  for (const test of validators) {
+    if (validator[test](value)) {
+      return false;
+    }
+  }
+
+  // Seems like this is data that should be parsed.
+  return true;
+}
+
+/**
+ * Tries to parse a string value into either a json or a key-value separated
+ * object. The value can also be a key separated array.
+ *
+ * @param {string} originalValue
+ *        The string to be parsed into an object
+ */
+function parseItemValue(originalValue) {
+  // Find if value is URLEncoded ie
+  let decodedValue = "";
+  try {
+    decodedValue = decodeURIComponent(originalValue);
+  } catch (e) {
+    // Unable to decode, nothing to do
+  }
+  const value =
+    decodedValue && decodedValue !== originalValue
+      ? decodedValue
+      : originalValue;
+
+  if (!_shouldParse(value)) {
+    return value;
+  }
+
+  let obj = null;
+  try {
+    obj = JSON5.parse(value);
+  } catch (ex) {
+    obj = null;
+  }
+
+  if (!obj && value) {
+    obj = _extractKeyValPairs(value);
+  }
+
+  // return if obj is null, or same as value, or just a string.
+  if (!obj || obj === value || typeof obj === "string") {
+    return value;
+  }
+
+  // If we got this far, originalValue is an object literal or array,
+  // and we have successfully parsed it
+  return obj;
+}
+
+exports.parseItemValue = parseItemValue;