mute-structs
Version:
NodeJS module providing an implementation of the LogootSplit CRDT algorithm
59 lines (55 loc) • 2.32 kB
JavaScript
/*
This file is part of MUTE-structs.
Copyright (C) 2017 Matthieu Nicolas, Victorien Elvinger
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { isObject } from "../../data-validation";
import { Epoch } from "../../epoch/epoch";
import { IdentifierInterval } from "../../identifierinterval";
import { isInt32 } from "../../int32";
import { RenamableListOperation } from "../renamablelistoperation";
/**
* Represents a LogootSplit rename operation.
*/
export class LogootSRename extends RenamableListOperation {
/**
* @constructor
*/
constructor(replicaNumber, clock, epoch, renamedIdIntervals) {
super(epoch);
this.replicaNumber = replicaNumber;
this.clock = clock;
this.renamedIdIntervals = renamedIdIntervals;
}
static fromPlain(o) {
if (isObject(o) &&
isInt32(o.replicaNumber) && isInt32(o.clock) &&
Array.isArray(o.renamedIdIntervals) && o.renamedIdIntervals.length > 0) {
const renamedIdIntervals = o.renamedIdIntervals.map(IdentifierInterval.fromPlain)
.filter((v) => v !== null);
const epoch = Epoch.fromPlain(o.epoch);
if (epoch !== null &&
o.renamedIdIntervals.length === renamedIdIntervals.length) {
return new LogootSRename(o.replicaNumber, o.clock, epoch, renamedIdIntervals);
}
}
return null;
}
get author() {
return this.replicaNumber;
}
execute(renamableList) {
renamableList.renameRemote(this.replicaNumber, this.clock, this.epoch, this.renamedIdIntervals);
return [];
}
}
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