@tangany/waas
Version:
node.js SDK for Tangany Wallet as a Service API
191 lines • 10.5 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 };
}
};
var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }
var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var g = generator.apply(thisArg, _arguments || []), i, q = [];
return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i;
function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
};
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ResourceIterable = void 0;
/**
* Base class to provide the results of API search requests as an asynchronous iterable that returns a single object per iteration rather than the complete results page.
* Nevertheless, each search result page is not fetched for each iteration, but only once.
* As soon as all items of the result list of the currently stored page have been returned, the next result page is fetched automatically.
* This way, the iterable hides the API-side pagination from the user such that it looks like an ordinary list of single objects that are actually located across pages.
* @template TApiResponse - Type of an entire search result page returned by the API
* @template TIteratorValue - Type of the item returned per iteration, usually created by converting single API search result items
*/
var ResourceIterable = /** @class */ (function () {
function ResourceIterable(waas, initialRequest) {
this.waas = waas;
this.initialRequest = initialRequest;
}
Object.defineProperty(ResourceIterable.prototype, "hits", {
/**
* Returns statistics on how many resources met the search criteria.
* This getter returns a Promise because the initial API search request is performed if that has not yet been done and the first page is therefore not in memory.
* If the first search result page is already stored, e.g. because the iterator has been used, the value is read from memory without any further HTTP request.
*/
get: function () {
return this.getFirstPage().then(function (x) { return x.hits; });
},
enumerable: false,
configurable: true
});
/**
* Returns the asynchronous iterator to traverse the list of items.
*/
ResourceIterable.prototype[Symbol.asyncIterator] = function () {
return __asyncGenerator(this, arguments, function _a() {
var currentPage, allItemsYielded, _b, _c, item, e_1_1, nextPageUrl;
var e_1, _d;
return __generator(this, function (_e) {
switch (_e.label) {
case 0: return [4 /*yield*/, __await(this.getFirstPage())];
case 1:
currentPage = _e.sent();
allItemsYielded = false;
_e.label = 2;
case 2:
if (!!allItemsYielded) return [3 /*break*/, 15];
_e.label = 3;
case 3:
_e.trys.push([3, 9, 10, 11]);
_b = (e_1 = void 0, __values(currentPage.list)), _c = _b.next();
_e.label = 4;
case 4:
if (!!_c.done) return [3 /*break*/, 8];
item = _c.value;
return [4 /*yield*/, __await(this.convertResponseItem(item))];
case 5: return [4 /*yield*/, _e.sent()];
case 6:
_e.sent();
_e.label = 7;
case 7:
_c = _b.next();
return [3 /*break*/, 4];
case 8: return [3 /*break*/, 11];
case 9:
e_1_1 = _e.sent();
e_1 = { error: e_1_1 };
return [3 /*break*/, 11];
case 10:
try {
if (_c && !_c.done && (_d = _b.return)) _d.call(_b);
}
finally { if (e_1) throw e_1.error; }
return [7 /*endfinally*/];
case 11:
nextPageUrl = currentPage.links.next;
if (!nextPageUrl) return [3 /*break*/, 13];
return [4 /*yield*/, __await(this.fetchPage(nextPageUrl))];
case 12:
// Do not use the query params as the first call is already done and the pagination links contain all the query params
currentPage = _e.sent();
return [3 /*break*/, 14];
case 13:
allItemsYielded = true;
_e.label = 14;
case 14: return [3 /*break*/, 2];
case 15: return [2 /*return*/];
}
});
});
};
/**
* Reads the first search result page from memory if it has previously been fetched, or performs the initial HTTP request otherwise.
* Note that in the latter case the result is stored in the corresponding private property.
*/
ResourceIterable.prototype.getFirstPage = function () {
return __awaiter(this, void 0, void 0, function () {
var _a, url, params, _b;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
if (!!this.firstPage) return [3 /*break*/, 2];
_a = this.initialRequest, url = _a.url, params = _a.params;
_b = this;
return [4 /*yield*/, this.fetchPage(url, params)];
case 1:
_b.firstPage = _c.sent();
_c.label = 2;
case 2: return [2 /*return*/, this.firstPage];
}
});
});
};
/**
* Queries another search results page based on the passed arguments.
* @param url - URL to be used for the HTTP GET request
* @param [params] - Query parameters to set the search criteria (usually only necessary to fetch the first page)
*/
ResourceIterable.prototype.fetchPage = function (url, params) {
return __awaiter(this, void 0, void 0, function () {
var config;
var _this = this;
return __generator(this, function (_a) {
config = {};
if (params) {
config.params = params;
}
return [2 /*return*/, this.waas.wrap(function () { return _this.waas.instance.get(url, config); })];
});
});
};
return ResourceIterable;
}());
exports.ResourceIterable = ResourceIterable;
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