ts-async-results
Version:
An Async implementation of the awesome github.com/vultix/ts-results.
211 lines • 9.43 kB
JavaScript
;
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
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.AsyncResult = exports.AsyncErr = exports.AsyncOk = exports.AsyncResultWrapper = void 0;
var ts_results_1 = require("ts-results");
var util_1 = require("./util");
var resolutionError = 'ResolutionError';
var AsyncResultWrapper = /** @class */ (function () {
function AsyncResultWrapper(result) {
this.isAsync = true;
this.result = Promise.resolve(typeof result === 'function' ? result() : result)
// Resolve it if it's an AsyncResult
.then(function (r) { return (AsyncResult.isAsyncResult(r) ? r.resolve() : r); })
.catch(function (e) {
console.error('AsyncResultWrapper Constructor Error', e);
throw e;
});
}
AsyncResultWrapper.prototype.resolve = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
try {
return [2 /*return*/, this.result];
}
catch (e) {
console.error('AsyncResultWrapper ResolveError', e);
throw e;
}
return [2 /*return*/];
});
});
};
AsyncResultWrapper.prototype.resolveUnwrap = function () {
return __awaiter(this, void 0, void 0, function () {
var r;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.resolve()];
case 1:
r = _a.sent();
if (r.ok) {
return [2 /*return*/, r.val];
}
throw r.val;
}
});
});
};
AsyncResultWrapper.prototype.resolveUnwrapOr = function (fallback) {
return __awaiter(this, void 0, void 0, function () {
var r, _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
_b.trys.push([0, 2, , 3]);
return [4 /*yield*/, this.resolveUnwrap()];
case 1:
r = _b.sent();
return [2 /*return*/, r];
case 2:
_a = _b.sent();
return [2 /*return*/, fallback];
case 3: return [2 /*return*/];
}
});
});
};
AsyncResultWrapper.prototype.map = function (mapper) {
var mapped = this.result.then(function (r) {
return r.ok ? new ts_results_1.Ok(mapper(r.val)) : r;
});
return new AsyncResultWrapper(util_1.traceAsyncErrors(function () { return mapped; }));
};
AsyncResultWrapper.prototype.mapErr = function (mapper) {
var mapped = this.result.then(function (r) {
return r.ok ? r : new ts_results_1.Err(mapper(r.val));
});
return new AsyncResultWrapper(util_1.traceAsyncErrors(function () { return mapped; }));
};
AsyncResultWrapper.prototype.flatMap = function (mapper) {
var mapped = this.result.then(function (r) {
if (!r.ok) {
return r;
}
var newRes = mapper(r.val);
if (AsyncResult.isAsyncResult(newRes)) {
return newRes.result;
}
return newRes;
});
return new AsyncResultWrapper(util_1.traceAsyncErrors(function () { return mapped; }));
};
AsyncResultWrapper.prototype.flatMapErr = function (mapper) {
var mapped = this.result.then(function (r) {
if (r.ok) {
return r;
}
var newRes = mapper(r.val);
if (AsyncResult.isAsyncResult(newRes)) {
return newRes.result;
}
return newRes;
});
return new AsyncResultWrapper(util_1.traceAsyncErrors(function () { return mapped; }));
};
return AsyncResultWrapper;
}());
exports.AsyncResultWrapper = AsyncResultWrapper;
var AsyncOk = /** @class */ (function (_super) {
__extends(AsyncOk, _super);
function AsyncOk(resolver) {
return _super.call(this, Promise.resolve(resolver).then(function (val) { return new ts_results_1.Ok(val); })) || this;
}
AsyncOk.EMPTY = new AsyncOk(undefined);
return AsyncOk;
}(AsyncResultWrapper));
exports.AsyncOk = AsyncOk;
var AsyncErr = /** @class */ (function (_super) {
__extends(AsyncErr, _super);
function AsyncErr(resolver) {
return _super.call(this, Promise.resolve(resolver).then(function (val) { return new ts_results_1.Err(val); })) || this;
}
AsyncErr.EMPTY = new AsyncErr(undefined);
return AsyncErr;
}(AsyncResultWrapper));
exports.AsyncErr = AsyncErr;
var AsyncResult;
(function (AsyncResult) {
/**
* Parse a set of `Result`s, returning an array of all `Ok` values.
* Short circuits with the first `Err` found, if any
*/
function all() {
var results = [];
for (var _i = 0; _i < arguments.length; _i++) {
results[_i] = arguments[_i];
}
var resolver = Promise.all(results.map(function (r) { return r.resolve(); })).then(function (results) { return ts_results_1.Result.all.apply(ts_results_1.Result, results); });
return new AsyncResultWrapper(resolver);
}
AsyncResult.all = all;
function toAsyncResult(result) {
return new AsyncResultWrapper(result);
}
AsyncResult.toAsyncResult = toAsyncResult;
function passThrough(fn) {
return function (item) {
fn(item);
return item;
};
}
AsyncResult.passThrough = passThrough;
function isObject(item) {
return typeof item === 'object' && !Array.isArray(item) && item !== null;
}
// Use this to get inherited keys as well
var keyInObject = function (obj, prop) { return prop in obj; };
function isAsyncResult(t) {
return isObject(t) && keyInObject(t, 'isAsync') && t.isAsync === true;
}
AsyncResult.isAsyncResult = isAsyncResult;
})(AsyncResult = exports.AsyncResult || (exports.AsyncResult = {}));
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