@tangany/waas
Version:
node.js SDK for Tangany Wallet as a Service API
110 lines • 6.32 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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) : adopt(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 });
exports.ResourcePageIterable = void 0;
/**
* Custom asynchronous iterable that reads WaaS resources based on the passed URL and search parameters.
* The iterator returns the entire page of the API pagination mechanism and is able to iterate through next and previous pages.
*/
var ResourcePageIterable = /** @class */ (function () {
function ResourcePageIterable(waas, initialRequest) {
this.waas = waas;
this.initialRequest = initialRequest;
this.nextPageUrl = initialRequest.url;
this.previousPageUrl = null;
this.isInitialRequestExecuted = false;
}
// It is important that the method returns the type of this class instead of AsyncIterableIterator (the base class).
// AsyncIterableIterator defines only next(), but not the custom previous() method of this class.
ResourcePageIterable.prototype[Symbol.asyncIterator] = function () {
return this;
};
ResourcePageIterable.prototype.next = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, this.iteratePage(this.nextPageUrl)];
});
});
};
ResourcePageIterable.prototype.previous = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, this.iteratePage(this.previousPageUrl)];
});
});
};
ResourcePageIterable.prototype.iteratePage = function (url) {
return __awaiter(this, void 0, void 0, function () {
var requestConfig, res, value;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
// In contrast to a normal iterable (without the previous() method), it is not quite clear when the iterator has finished (when `done` is set to true).
// Even if the last page is reached and next() returns null, the iterator could still be used to work with previous(), which in turn returns page content.
// However, this is difficult to handle and the iterator would never finish, so "for await ... of" loops probably won't work as expected.
if (!url) {
return [2 /*return*/, {
value: null,
done: true,
}];
}
requestConfig = {};
// Ignore the query parameters after the initial request has been executed, because the returned pagination links contain all used filters
if (!this.isInitialRequestExecuted) {
requestConfig.params = this.initialRequest.params;
this.isInitialRequestExecuted = true;
}
return [4 /*yield*/, this.waas.wrap(function () { return _this.waas.instance.get(url, requestConfig); })];
case 1:
res = _a.sent();
this.nextPageUrl = res.links.next;
this.previousPageUrl = res.links.previous;
value = this.convertApiResponse(res);
return [2 /*return*/, {
value: value,
done: false,
}];
}
});
});
};
return ResourcePageIterable;
}());
exports.ResourcePageIterable = ResourcePageIterable;
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