.

qwen/nodejs/node_modules/@ungap/structured-clone/cjs/serialize.js

@@ -0,0 +1,170 @@
+'use strict';
+const {
+  VOID, PRIMITIVE, ARRAY, OBJECT, DATE, REGEXP, MAP, SET, ERROR, BIGINT
+} = require('./types.js');
+
+const EMPTY = '';
+
+const {toString} = {};
+const {keys} = Object;
+
+const typeOf = value => {
+  const type = typeof value;
+  if (type !== 'object' || !value)
+    return [PRIMITIVE, type];
+
+  const asString = toString.call(value).slice(8, -1);
+  switch (asString) {
+    case 'Array':
+      return [ARRAY, EMPTY];
+    case 'Object':
+      return [OBJECT, EMPTY];
+    case 'Date':
+      return [DATE, EMPTY];
+    case 'RegExp':
+      return [REGEXP, EMPTY];
+    case 'Map':
+      return [MAP, EMPTY];
+    case 'Set':
+      return [SET, EMPTY];
+    case 'DataView':
+      return [ARRAY, asString];
+  }
+
+  if (asString.includes('Array'))
+    return [ARRAY, asString];
+
+  if (asString.includes('Error'))
+    return [ERROR, asString];
+
+  return [OBJECT, asString];
+};
+
+const shouldSkip = ([TYPE, type]) => (
+  TYPE === PRIMITIVE &&
+  (type === 'function' || type === 'symbol')
+);
+
+const serializer = (strict, json, $, _) => {
+
+  const as = (out, value) => {
+    const index = _.push(out) - 1;
+    $.set(value, index);
+    return index;
+  };
+
+  const pair = value => {
+    if ($.has(value))
+      return $.get(value);
+
+    let [TYPE, type] = typeOf(value);
+    switch (TYPE) {
+      case PRIMITIVE: {
+        let entry = value;
+        switch (type) {
+          case 'bigint':
+            TYPE = BIGINT;
+            entry = value.toString();
+            break;
+          case 'function':
+          case 'symbol':
+            if (strict)
+              throw new TypeError('unable to serialize ' + type);
+            entry = null;
+            break;
+          case 'undefined':
+            return as([VOID], value);
+        }
+        return as([TYPE, entry], value);
+      }
+      case ARRAY: {
+        if (type) {
+          let spread = value;
+          if (type === 'DataView') {
+            spread = new Uint8Array(value.buffer);
+          }
+          else if (type === 'ArrayBuffer') {
+            spread = new Uint8Array(value);
+          }
+          return as([type, [...spread]], value);
+        }
+
+        const arr = [];
+        const index = as([TYPE, arr], value);
+        for (const entry of value)
+          arr.push(pair(entry));
+        return index;
+      }
+      case OBJECT: {
+        if (type) {
+          switch (type) {
+            case 'BigInt':
+              return as([type, value.toString()], value);
+            case 'Boolean':
+            case 'Number':
+            case 'String':
+              return as([type, value.valueOf()], value);
+          }
+        }
+
+        if (json && ('toJSON' in value))
+          return pair(value.toJSON());
+
+        const entries = [];
+        const index = as([TYPE, entries], value);
+        for (const key of keys(value)) {
+          if (strict || !shouldSkip(typeOf(value[key])))
+            entries.push([pair(key), pair(value[key])]);
+        }
+        return index;
+      }
+      case DATE:
+        return as([TYPE, value.toISOString()], value);
+      case REGEXP: {
+        const {source, flags} = value;
+        return as([TYPE, {source, flags}], value);
+      }
+      case MAP: {
+        const entries = [];
+        const index = as([TYPE, entries], value);
+        for (const [key, entry] of value) {
+          if (strict || !(shouldSkip(typeOf(key)) || shouldSkip(typeOf(entry))))
+            entries.push([pair(key), pair(entry)]);
+        }
+        return index;
+      }
+      case SET: {
+        const entries = [];
+        const index = as([TYPE, entries], value);
+        for (const entry of value) {
+          if (strict || !shouldSkip(typeOf(entry)))
+            entries.push(pair(entry));
+        }
+        return index;
+      }
+    }
+
+    const {message} = value;
+    return as([TYPE, {name: type, message}], value);
+  };
+
+  return pair;
+};
+
+/**
+ * @typedef {Array<string,any>} Record a type representation
+ */
+
+/**
+ * Returns an array of serialized Records.
+ * @param {any} value a serializable value.
+ * @param {{json?: boolean, lossy?: boolean}?} options an object with a `lossy` or `json` property that,
+ *  if `true`, will not throw errors on incompatible types, and behave more
+ *  like JSON stringify would behave. Symbol and Function will be discarded.
+ * @returns {Record[]}
+ */
+ const serialize = (value, {json, lossy} = {}) => {
+  const _ = [];
+  return serializer(!(json || lossy), !!json, new Map, _)(value), _;
+};
+exports.serialize = serialize;