101 lines
2.5 KiB
TypeScript
101 lines
2.5 KiB
TypeScript
// Copyright 2020 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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/* eslint-disable @typescript-eslint/no-explicit-any */
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/* eslint-disable max-classes-per-file */
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import { ByteBufferClass } from '../window.d';
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import { AttachmentType } from './SendMessage';
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type ProtobufConstructorType = {
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decode: (data: ArrayBuffer) => ProtobufType;
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};
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type ProtobufType = {
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avatar?: PackedAttachmentType;
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profileKey?: any;
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uuid?: string;
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members: Array<string>;
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};
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export type PackedAttachmentType = AttachmentType & {
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length: number;
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};
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export class ProtoParser {
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buffer: ByteBufferClass;
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protobuf: ProtobufConstructorType;
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constructor(arrayBuffer: ArrayBuffer, protobuf: ProtobufConstructorType) {
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this.protobuf = protobuf;
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this.buffer = new window.dcodeIO.ByteBuffer();
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this.buffer.append(arrayBuffer);
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this.buffer.offset = 0;
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this.buffer.limit = arrayBuffer.byteLength;
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}
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next(): ProtobufType | undefined | null {
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try {
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if (this.buffer.limit === this.buffer.offset) {
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return undefined; // eof
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}
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const len = this.buffer.readVarint32();
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const nextBuffer = this.buffer
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.slice(this.buffer.offset, this.buffer.offset + len)
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.toArrayBuffer();
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const proto = this.protobuf.decode(nextBuffer);
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this.buffer.skip(len);
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if (proto.avatar) {
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const attachmentLen = proto.avatar.length;
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proto.avatar.data = this.buffer
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.slice(this.buffer.offset, this.buffer.offset + attachmentLen)
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.toArrayBuffer();
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this.buffer.skip(attachmentLen);
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}
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if (proto.profileKey) {
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proto.profileKey = proto.profileKey.toArrayBuffer();
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}
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if (proto.uuid) {
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window.normalizeUuids(
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proto,
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['uuid'],
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'ProtoParser::next (proto.uuid)'
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);
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}
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if (proto.members) {
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window.normalizeUuids(
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proto,
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proto.members.map((_member, i) => `members.${i}.uuid`),
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'ProtoParser::next (proto.members)'
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);
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}
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return proto;
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} catch (error) {
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window.log.error(
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'ProtoParser.next error:',
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error && error.stack ? error.stack : error
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);
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}
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return null;
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}
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}
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export class GroupBuffer extends ProtoParser {
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constructor(arrayBuffer: ArrayBuffer) {
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super(arrayBuffer, window.textsecure.protobuf.GroupDetails as any);
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}
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}
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export class ContactBuffer extends ProtoParser {
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constructor(arrayBuffer: ArrayBuffer) {
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super(arrayBuffer, window.textsecure.protobuf.ContactDetails as any);
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}
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}
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