@dcl/ecs
Version:
Decentraland ECS
72 lines (71 loc) • 2.18 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CrdtMessageProtocol = void 0;
const types_1 = require("./types");
/**
* @public
*/
var CrdtMessageProtocol;
(function (CrdtMessageProtocol) {
/**
* Validate if the message incoming is completed
* @param buf - ByteBuffer
*/
function validate(buf) {
const rem = buf.remainingBytes();
if (rem < types_1.CRDT_MESSAGE_HEADER_LENGTH) {
return false;
}
const messageLength = buf.getUint32(buf.currentReadOffset());
if (rem < messageLength) {
return false;
}
return true;
}
CrdtMessageProtocol.validate = validate;
/**
* Get the current header, consuming the bytes involved.
* @param buf - ByteBuffer
* @returns header or null if there is no validated message
*/
function readHeader(buf) {
if (!validate(buf)) {
return null;
}
return {
length: buf.readUint32(),
type: buf.readUint32()
};
}
CrdtMessageProtocol.readHeader = readHeader;
/**
* Get the current header, without consuming the bytes involved.
* @param buf - ByteBuffer
* @returns header or null if there is no validated message
*/
function getHeader(buf) {
if (!validate(buf)) {
return null;
}
const currentOffset = buf.currentReadOffset();
return {
length: buf.getUint32(currentOffset),
type: buf.getUint32(currentOffset + 4)
};
}
CrdtMessageProtocol.getHeader = getHeader;
/**
* Consume the incoming message without processing it.
* @param buf - ByteBuffer
* @returns true in case of success or false if there is no valid message.
*/
function consumeMessage(buf) {
const header = getHeader(buf);
if (!header) {
return false;
}
buf.incrementReadOffset(header.length);
return true;
}
CrdtMessageProtocol.consumeMessage = consumeMessage;
})(CrdtMessageProtocol = exports.CrdtMessageProtocol || (exports.CrdtMessageProtocol = {}));