json-joy
Version:
Collection of libraries for building collaborative editing apps.
54 lines (53 loc) • 1.72 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ClockEncoder = void 0;
const clock_1 = require("../../clock");
const RelativeTimestamp_1 = require("./RelativeTimestamp");
class ClockTableEntry {
constructor(index, clock) {
this.index = index;
this.clock = clock;
}
}
class ClockEncoder {
constructor() {
this.table = new Map();
/** Start from 1, as 0 is reserved for system session ID. */
this.index = 1;
this.clock = null;
}
reset(clock) {
this.index = 1;
this.clock = clock;
const entry = new ClockTableEntry(this.index++, (0, clock_1.tick)(clock, -1));
this.table.clear();
this.table.set(clock.sid, entry);
}
append(ts) {
const time = ts.time;
const sid = ts.sid;
let entry = this.table.get(sid);
if (!entry) {
let clock = this.clock.peers.get(sid);
if (!clock)
clock = new clock_1.Timestamp(sid, this.clock.time - 1);
entry = new ClockTableEntry(this.index++, clock);
this.table.set(sid, entry);
}
const clock = entry.clock;
const timeDiff = clock.time - time;
if (timeDiff < 0)
throw new Error('TIME_TRAVEL');
return new RelativeTimestamp_1.RelativeTimestamp(entry.index, timeDiff);
}
toJson() {
const out = [];
// biome-ignore lint: using .forEach() on Map is the fastest way to iterate
this.table.forEach((entry) => {
const clock = entry.clock;
out.push(clock.sid, clock.time);
});
return out;
}
}
exports.ClockEncoder = ClockEncoder;