@aws-amplify/datastore
Version:
AppSyncLocal support for aws-amplify
74 lines • 3.55 kB
JavaScript
import { __awaiter, __generator, __read, __spread, __values } from "tslib";
import { OpType, } from '../types';
import { getIdentifierValue } from './utils';
// https://github.com/aws-amplify/amplify-js/blob/datastore-docs/packages/datastore/docs/sync-engine.md#merger
var ModelMerger = /** @class */ (function () {
function ModelMerger(outbox, ownSymbol) {
this.outbox = outbox;
this.ownSymbol = ownSymbol;
}
/**
*
* @param storage Storage adapter that contains the data.
* @param model The model from an outbox mutation.
* @returns The type of operation (INSERT/UPDATE/DELETE)
*/
ModelMerger.prototype.merge = function (storage, model, modelDefinition) {
return __awaiter(this, void 0, void 0, function () {
var result, mutationsForModel, isDelete;
var _a, _b;
return __generator(this, function (_c) {
switch (_c.label) {
case 0: return [4 /*yield*/, this.outbox.getForModel(storage, model, modelDefinition)];
case 1:
mutationsForModel = _c.sent();
isDelete = model._deleted;
if (!(mutationsForModel.length === 0)) return [3 /*break*/, 5];
if (!isDelete) return [3 /*break*/, 3];
result = OpType.DELETE;
return [4 /*yield*/, storage.delete(model, undefined, this.ownSymbol)];
case 2:
_c.sent();
return [3 /*break*/, 5];
case 3: return [4 /*yield*/, storage.save(model, undefined, this.ownSymbol)];
case 4:
_a = __read.apply(void 0, [_c.sent(), 1]), _b = __read(_a[0], 2), result = _b[1];
_c.label = 5;
case 5: return [2 /*return*/, result];
}
});
});
};
ModelMerger.prototype.mergePage = function (storage, modelConstructor, items, modelDefinition) {
return __awaiter(this, void 0, void 0, function () {
var itemsMap, items_1, items_1_1, item, modelId, page;
var e_1, _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
itemsMap = new Map();
try {
for (items_1 = __values(items), items_1_1 = items_1.next(); !items_1_1.done; items_1_1 = items_1.next()) {
item = items_1_1.value;
modelId = getIdentifierValue(modelDefinition, item);
itemsMap.set(modelId, item);
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (items_1_1 && !items_1_1.done && (_a = items_1.return)) _a.call(items_1);
}
finally { if (e_1) throw e_1.error; }
}
page = __spread(itemsMap.values());
return [4 /*yield*/, storage.batchSave(modelConstructor, page, this.ownSymbol)];
case 1: return [2 /*return*/, _b.sent()];
}
});
});
};
return ModelMerger;
}());
export { ModelMerger };
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