json-joy
Version:
Collection of libraries for building collaborative editing apps.
88 lines (87 loc) • 2.97 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.PartialEditFactory = exports.PartialEdit = void 0;
const ClockTable_1 = require("../../json-crdt-patch/codec/clock/ClockTable");
const PartialEditModel_1 = require("./PartialEditModel");
class PartialEdit {
constructor(decoder, encoder, clockTable = new ClockTable_1.ClockTable()) {
this.decoder = decoder;
this.encoder = encoder;
this.clockTable = clockTable;
/** List of fields/nodes to fetch before applying the patches. */
this.loadList = new Set();
this.doc = null;
}
populateLoadList(patch) {
const ops = patch.ops;
const length = ops.length;
const loadList = this.loadList;
for (let i = 0; i < length; i++) {
const op = ops[i];
const obj = op.obj;
if (obj) {
if (obj.sid === 0) {
loadList.add('r');
continue;
}
const entry = this.clockTable.bySid.get(obj.sid);
if (!entry)
continue;
const fieldName = `${entry.index.toString(36)}_${obj.time.toString(36)}`;
loadList.add(fieldName);
}
}
}
getFieldsToLoad() {
return this.loadList;
}
loadPartialModel(fields) {
this.doc = this.decoder.decodeFields(this.clockTable, fields, PartialEditModel_1.PartialEditModel);
return this.doc;
}
applyPatch(patch) {
this.doc.applyPatch(patch);
}
populateClockTable() {
const doc = this.doc;
const peers = doc.clock.peers;
const clockTable = this.clockTable;
peers.forEach((clock, sid) => {
if (!clockTable.bySid.has(sid)) {
clockTable.push(clock);
}
});
}
getFieldEdits() {
const doc = this.doc;
const updates = this.encoder.encode(doc, this.clockTable);
const clockTable = this.clockTable;
const deletedIds = doc.deletes;
const length = deletedIds.length;
const deletes = new Set();
for (let i = 0; i < length; i++) {
const id = deletedIds[i];
const field = `${clockTable.getBySid(id.sid).index}_${id.time.toString(36)}`;
deletes.add(field);
}
return {
updates,
deletes,
};
}
}
exports.PartialEdit = PartialEdit;
class PartialEditFactory {
constructor(decoder, encoder) {
this.decoder = decoder;
this.encoder = encoder;
}
startPartialEdit(clockBlob) {
const reader = this.decoder.dec.reader;
reader.reset(clockBlob);
const clockTable = ClockTable_1.ClockTable.decode(reader);
const partialEdit = new PartialEdit(this.decoder, this.encoder, clockTable);
return partialEdit;
}
}
exports.PartialEditFactory = PartialEditFactory;