@worldbrain/storex-sync
Version:
Offline-first syncing between multiple databases using Storex
151 lines • 7.4 kB
JavaScript
"use strict";
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
function shareLogEntries(args) {
return __awaiter(this, void 0, void 0, function () {
var entries;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, args.clientSyncLog.getUnsharedEntries()];
case 1:
entries = _a.sent();
return [4, args.sharedSyncLog.writeEntries(entries.map(function (entry) { return ({
userId: null,
deviceId: null,
createdOn: entry.createdOn,
sharedOn: args.now,
data: JSON.stringify({
operation: entry.operation,
collection: entry.collection,
pk: entry.pk,
field: entry['field'] || null,
value: entry['value'] || null,
})
}); }), { userId: args.userId, deviceId: args.deviceId })];
case 2:
_a.sent();
return [4, args.clientSyncLog.updateSharedUntil({ until: args.now, sharedOn: args.now })];
case 3:
_a.sent();
return [2];
}
});
});
}
exports.shareLogEntries = shareLogEntries;
function receiveLogEntries(args) {
return __awaiter(this, void 0, void 0, function () {
var entries;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, args.sharedSyncLog.getUnsyncedEntries({ deviceId: args.deviceId })];
case 1:
entries = _a.sent();
return [4, args.clientSyncLog.insertReceivedEntries(entries, { now: args.now })];
case 2:
_a.sent();
return [4, args.sharedSyncLog.updateSharedUntil({ until: args.now, deviceId: args.deviceId })];
case 3:
_a.sent();
return [2];
}
});
});
}
exports.receiveLogEntries = receiveLogEntries;
function writeReconcilation(args) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, args.storageManager.backend.operation('executeBatch', args.reconciliation.map(function (step) { return (__assign({}, step, { placeholder: '' })); }))];
case 1:
_a.sent();
return [2];
}
});
});
}
exports.writeReconcilation = writeReconcilation;
function doSync(_a) {
var clientSyncLog = _a.clientSyncLog, sharedSyncLog = _a.sharedSyncLog, storageManager = _a.storageManager, reconciler = _a.reconciler, now = _a.now, userId = _a.userId, deviceId = _a.deviceId;
return __awaiter(this, void 0, void 0, function () {
var entries, reconciliation;
return __generator(this, function (_b) {
switch (_b.label) {
case 0: return [4, receiveLogEntries({ clientSyncLog: clientSyncLog, sharedSyncLog: sharedSyncLog, deviceId: deviceId, now: now })];
case 1:
_b.sent();
return [4, shareLogEntries({ clientSyncLog: clientSyncLog, sharedSyncLog: sharedSyncLog, userId: userId, deviceId: deviceId, now: now })];
case 2:
_b.sent();
_b.label = 3;
case 3:
if (!true) return [3, 8];
return [4, clientSyncLog.getNextEntriesToIntgrate()];
case 4:
entries = _b.sent();
if (!entries) {
return [3, 8];
}
return [4, reconciler(entries, { storageRegistry: storageManager.registry })];
case 5:
reconciliation = _b.sent();
return [4, writeReconcilation({ storageManager: storageManager, reconciliation: reconciliation })];
case 6:
_b.sent();
return [4, clientSyncLog.markAsIntegrated(entries)];
case 7:
_b.sent();
return [3, 3];
case 8: return [2];
}
});
});
}
exports.doSync = doSync;
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