Initial working version

node_modules/engine.io-parser/build/cjs/decodePacket.js

@@ -0,0 +1,49 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const commons_js_1 = require("./commons.js");
+const decodePacket = (encodedPacket, binaryType) => {
+    if (typeof encodedPacket !== "string") {
+        return {
+            type: "message",
+            data: mapBinary(encodedPacket, binaryType)
+        };
+    }
+    const type = encodedPacket.charAt(0);
+    if (type === "b") {
+        const buffer = Buffer.from(encodedPacket.substring(1), "base64");
+        return {
+            type: "message",
+            data: mapBinary(buffer, binaryType)
+        };
+    }
+    if (!commons_js_1.PACKET_TYPES_REVERSE[type]) {
+        return commons_js_1.ERROR_PACKET;
+    }
+    return encodedPacket.length > 1
+        ? {
+            type: commons_js_1.PACKET_TYPES_REVERSE[type],
+            data: encodedPacket.substring(1)
+        }
+        : {
+            type: commons_js_1.PACKET_TYPES_REVERSE[type]
+        };
+};
+const mapBinary = (data, binaryType) => {
+    const isBuffer = Buffer.isBuffer(data);
+    switch (binaryType) {
+        case "arraybuffer":
+            return isBuffer ? toArrayBuffer(data) : data;
+        case "nodebuffer":
+        default:
+            return data; // assuming the data is already a Buffer
+    }
+};
+const toArrayBuffer = buffer => {
+    const arrayBuffer = new ArrayBuffer(buffer.length);
+    const view = new Uint8Array(arrayBuffer);
+    for (let i = 0; i < buffer.length; i++) {
+        view[i] = buffer[i];
+    }
+    return arrayBuffer;
+};
+exports.default = decodePacket;