Website Structure

Frontend-Learner/node_modules/devalue/src/parse.js

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+import { decode64 } from './base64.js';
+import {
+	HOLE,
+	NAN,
+	NEGATIVE_INFINITY,
+	NEGATIVE_ZERO,
+	POSITIVE_INFINITY,
+	UNDEFINED
+} from './constants.js';
+
+/**
+ * Revive a value serialized with `devalue.stringify`
+ * @param {string} serialized
+ * @param {Record<string, (value: any) => any>} [revivers]
+ */
+export function parse(serialized, revivers) {
+	return unflatten(JSON.parse(serialized), revivers);
+}
+
+/**
+ * Revive a value flattened with `devalue.stringify`
+ * @param {number | any[]} parsed
+ * @param {Record<string, (value: any) => any>} [revivers]
+ */
+export function unflatten(parsed, revivers) {
+	if (typeof parsed === 'number') return hydrate(parsed, true);
+
+	if (!Array.isArray(parsed) || parsed.length === 0) {
+		throw new Error('Invalid input');
+	}
+
+	const values = /** @type {any[]} */ (parsed);
+
+	const hydrated = Array(values.length);
+
+	/**
+	 * @param {number} index
+	 * @returns {any}
+	 */
+	function hydrate(index, standalone = false) {
+		if (index === UNDEFINED) return undefined;
+		if (index === NAN) return NaN;
+		if (index === POSITIVE_INFINITY) return Infinity;
+		if (index === NEGATIVE_INFINITY) return -Infinity;
+		if (index === NEGATIVE_ZERO) return -0;
+
+		if (standalone || typeof index !== 'number') {
+			throw new Error(`Invalid input`);
+		}
+
+		if (index in hydrated) return hydrated[index];
+
+		const value = values[index];
+
+		if (!value || typeof value !== 'object') {
+			hydrated[index] = value;
+		} else if (Array.isArray(value)) {
+			if (typeof value[0] === 'string') {
+				const type = value[0];
+
+				const reviver =
+					revivers && Object.hasOwn(revivers, type)
+						? revivers[type]
+						: undefined;
+
+				if (reviver) {
+					let i = value[1];
+					if (typeof i !== 'number') {
+						// if it's not a number, it was serialized by a builtin reviver
+						// so we need to munge it into the format expected by a custom reviver
+						i = values.push(value[1]) - 1;
+					}
+					return (hydrated[index] = reviver(hydrate(i)));
+				}
+
+				switch (type) {
+					case 'Date':
+						hydrated[index] = new Date(value[1]);
+						break;
+
+					case 'Set':
+						const set = new Set();
+						hydrated[index] = set;
+						for (let i = 1; i < value.length; i += 1) {
+							set.add(hydrate(value[i]));
+						}
+						break;
+
+					case 'Map':
+						const map = new Map();
+						hydrated[index] = map;
+						for (let i = 1; i < value.length; i += 2) {
+							map.set(hydrate(value[i]), hydrate(value[i + 1]));
+						}
+						break;
+
+					case 'RegExp':
+						hydrated[index] = new RegExp(value[1], value[2]);
+						break;
+
+					case 'Object':
+						hydrated[index] = Object(value[1]);
+						break;
+
+					case 'BigInt':
+						hydrated[index] = BigInt(value[1]);
+						break;
+
+					case 'null':
+						const obj = Object.create(null);
+						hydrated[index] = obj;
+						for (let i = 1; i < value.length; i += 2) {
+							obj[value[i]] = hydrate(value[i + 1]);
+						}
+						break;
+
+					case 'Int8Array':
+					case 'Uint8Array':
+					case 'Uint8ClampedArray':
+					case 'Int16Array':
+					case 'Uint16Array':
+					case 'Int32Array':
+					case 'Uint32Array':
+					case 'Float32Array':
+					case 'Float64Array':
+					case 'BigInt64Array':
+					case 'BigUint64Array': {
+						const TypedArrayConstructor = globalThis[type];
+						const typedArray = new TypedArrayConstructor(hydrate(value[1]));
+
+						hydrated[index] =
+							value[2] !== undefined
+								? typedArray.subarray(value[2], value[3])
+								: typedArray;
+
+						break;
+					}
+
+					case 'ArrayBuffer': {
+						const base64 = value[1];
+						const arraybuffer = decode64(base64);
+						hydrated[index] = arraybuffer;
+						break;
+					}
+
+					case 'Temporal.Duration':
+					case 'Temporal.Instant':
+					case 'Temporal.PlainDate':
+					case 'Temporal.PlainTime':
+					case 'Temporal.PlainDateTime':
+					case 'Temporal.PlainMonthDay':
+					case 'Temporal.PlainYearMonth':
+					case 'Temporal.ZonedDateTime': {
+						const temporalName = type.slice(9);
+						// @ts-expect-error TS doesn't know about Temporal yet
+						hydrated[index] = Temporal[temporalName].from(value[1]);
+						break;
+					}
+
+					case 'URL': {
+						const url = new URL(value[1]);
+						hydrated[index] = url;
+						break;
+					}
+
+					case 'URLSearchParams': {
+						const url = new URLSearchParams(value[1]);
+						hydrated[index] = url;
+						break;
+					}
+
+					default:
+						throw new Error(`Unknown type ${type}`);
+				}
+			} else {
+				const array = new Array(value.length);
+				hydrated[index] = array;
+
+				for (let i = 0; i < value.length; i += 1) {
+					const n = value[i];
+					if (n === HOLE) continue;
+
+					array[i] = hydrate(n);
+				}
+			}
+		} else {
+			/** @type {Record<string, any>} */
+			const object = {};
+			hydrated[index] = object;
+
+			for (const key in value) {
+				if (key === '__proto__') {
+					throw new Error('Cannot parse an object with a `__proto__` property');
+				}
+
+				const n = value[key];
+				object[key] = hydrate(n);
+			}
+		}
+
+		return hydrated[index];
+	}
+
+	return hydrate(0);
+}