@dcl/ecs
Version:
Decentraland ECS
53 lines (52 loc) • 2.21 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.AppendValueOperation = void 0;
const crdtMessageProtocol_1 = require("./crdtMessageProtocol");
const types_1 = require("./types");
/**
* @public
*/
var AppendValueOperation;
(function (AppendValueOperation) {
AppendValueOperation.MESSAGE_HEADER_LENGTH = 16;
/**
* Call this function for an optimal writing data passing the ByteBuffer
* already allocated
*/
function write(entity, timestamp, componentId, data, buf) {
// reserve the beginning
const startMessageOffset = buf.incrementWriteOffset(types_1.CRDT_MESSAGE_HEADER_LENGTH + AppendValueOperation.MESSAGE_HEADER_LENGTH);
// write body
buf.writeBuffer(data, false);
const messageLength = buf.currentWriteOffset() - startMessageOffset;
// Write CrdtMessage header
buf.setUint32(startMessageOffset, messageLength);
buf.setUint32(startMessageOffset + 4, types_1.CrdtMessageType.APPEND_VALUE);
// Write ComponentOperation header
buf.setUint32(startMessageOffset + 8, entity);
buf.setUint32(startMessageOffset + 12, componentId);
buf.setUint32(startMessageOffset + 16, timestamp);
const newLocal = messageLength - AppendValueOperation.MESSAGE_HEADER_LENGTH - types_1.CRDT_MESSAGE_HEADER_LENGTH;
buf.setUint32(startMessageOffset + 20, newLocal);
}
AppendValueOperation.write = write;
function read(buf) {
const header = crdtMessageProtocol_1.CrdtMessageProtocol.readHeader(buf);
/* istanbul ignore if */
if (!header) {
return null;
}
/* istanbul ignore if */
if (header.type !== types_1.CrdtMessageType.APPEND_VALUE) {
throw new Error('AppendValueOperation tried to read another message type.');
}
return {
...header,
entityId: buf.readUint32(),
componentId: buf.readUint32(),
timestamp: buf.readUint32(),
data: buf.readBuffer()
};
}
AppendValueOperation.read = read;
})(AppendValueOperation = exports.AppendValueOperation || (exports.AppendValueOperation = {}));