tsoid/dist/src/promises/lift.js

Typed functional library to deal with async operations.

"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());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
const either_1 = require("./either");
const id_1 = require("../utils/id");
const fail_1 = require("./fail");
function liftP(fn, pa) {
    return __awaiter(this, void 0, void 0, function* () {
        return either_1.default(fn, id_1.default, pa);
    });
}
exports.default = liftP;
/**
 * Lift a 2-arity function to the promise execution and returns a new
 * promise with the final result
 *
 * @param fn
 * @param pa
 * @param pb
 */
function liftP2(fn, pa, pb) {
    return __awaiter(this, void 0, void 0, function* () {
        try {
            const resA = yield pa();
            if (resA instanceof Error)
                return fail_1.default(resA);
            const resB = yield pb();
            if (resB instanceof Error)
                return fail_1.default(resB);
            return fn(resA, resB);
        }
        catch (err) {
            return fail_1.default(err);
        }
    });
}
exports.liftP2 = liftP2;
function liftP3(fn, pa, pb, pc) {
    return __awaiter(this, void 0, void 0, function* () {
        try {
            const resA = yield pa();
            if (resA instanceof Error)
                return fail_1.default(resA);
            const resB = yield pb();
            if (resB instanceof Error)
                return fail_1.default(resB);
            const resC = yield pc();
            if (resC instanceof Error)
                return fail_1.default(resC);
            return fn(resA, resB, resC);
        }
        catch (err) {
            return fail_1.default(err);
        }
    });
}
exports.liftP3 = liftP3;
function liftPN(fn, ...ps) {
    return __awaiter(this, void 0, void 0, function* () {
        try {
            const results = [];
            for (const p of ps) {
                const result = yield p();
                if (result instanceof Error) {
                    return fail_1.default(result);
                }
                results.push(result);
            }
            return fn(...results);
        }
        catch (err) {
            return fail_1.default(err);
        }
    });
}
exports.liftPN = liftPN;