fake-indexeddb
Version:
Fake IndexedDB: a pure JS in-memory implementation of the IndexedDB API
58 lines (57 loc) • 1.72 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _valueToKey = _interopRequireDefault(require("./valueToKey.js"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
// http://www.w3.org/TR/2015/REC-IndexedDB-20150108/#dfn-steps-for-extracting-a-key-from-a-value-using-a-key-path
const extractKey = (keyPath, value) => {
if (Array.isArray(keyPath)) {
const result = [];
for (let item of keyPath) {
// This doesn't make sense to me based on the spec, but it is needed to pass the W3C KeyPath tests (see same
// comment in validateKeyPath)
if (item !== undefined && item !== null && typeof item !== "string" && item.toString) {
item = item.toString();
}
const key = extractKey(item, value).key;
result.push((0, _valueToKey.default)(key));
}
return {
type: "found",
key: result
};
}
if (keyPath === "") {
return {
type: "found",
key: value
};
}
let remainingKeyPath = keyPath;
let object = value;
while (remainingKeyPath !== null) {
let identifier;
const i = remainingKeyPath.indexOf(".");
if (i >= 0) {
identifier = remainingKeyPath.slice(0, i);
remainingKeyPath = remainingKeyPath.slice(i + 1);
} else {
identifier = remainingKeyPath;
remainingKeyPath = null;
}
if (object === undefined || object === null || !Object.hasOwn(object, identifier)) {
return {
type: "notFound"
};
}
object = object[identifier];
}
return {
type: "found",
key: object
};
};
var _default = exports.default = extractKey;
module.exports = exports.default;