53 lines
1.7 KiB
JavaScript
53 lines
1.7 KiB
JavaScript
/*
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* vim: ts=4:sw=4:expandtab
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*/
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function ProtoParser(arrayBuffer, protobuf) {
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this.protobuf = protobuf;
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this.buffer = new 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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ProtoParser.prototype = {
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constructor: ProtoParser,
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next: function() {
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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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var len = this.buffer.readVarint32();
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var nextBuffer = this.buffer.slice(
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this.buffer.offset, this.buffer.offset+len
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).toArrayBuffer();
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// TODO: de-dupe ByteBuffer.js includes in libaxo/libts
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// then remove this toArrayBuffer call.
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var proto = this.protobuf.decode(nextBuffer);
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this.buffer.skip(len);
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if (proto.avatar) {
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var attachmentLen = proto.avatar.length;
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proto.avatar.data = this.buffer.slice(
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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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return proto;
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} catch(e) {
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console.log(e);
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}
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}
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};
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var GroupBuffer = function(arrayBuffer) {
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ProtoParser.call(this, arrayBuffer, textsecure.protobuf.GroupDetails);
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};
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GroupBuffer.prototype = Object.create(ProtoParser.prototype);
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GroupBuffer.prototype.constructor = GroupBuffer;
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var ContactBuffer = function(arrayBuffer) {
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ProtoParser.call(this, arrayBuffer, textsecure.protobuf.ContactDetails);
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};
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ContactBuffer.prototype = Object.create(ProtoParser.prototype);
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ContactBuffer.prototype.constructor = ContactBuffer;
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