@artlife/micro/build/utils.js

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    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) : new P(function (resolve) { resolve(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 });
var chai_1 = require("chai");
//
// Various utility functions.
//
//
// Verify that a query parameter to a request is set.
//
function verifyQueryParam(name, req) {
    if (req.query[name] === undefined) {
        throw new Error("Missing query parameter " + name);
    }
    return req.query[name];
}
exports.verifyQueryParam = verifyQueryParam;
//
// Verify that a body parameter to a request is set.
//
function verifyBodyParam(name, req) {
    if (req.body[name] === undefined) {
        throw new Error("Missing body parameter " + name);
    }
    return req.body[name];
}
exports.verifyBodyParam = verifyBodyParam;
//
// Sleep for the specified amount of time.
//
function sleep(timeMS) {
    return __awaiter(this, void 0, void 0, function () {
        return __generator(this, function (_a) {
            return [2 /*return*/, new Promise(function (resolve, reject) {
                    setTimeout(function () {
                        resolve();
                    }, timeMS);
                })];
        });
    });
}
exports.sleep = sleep;
//
// A function that adapts an async handler to work with react.
//
function asyncHandler(self, handlerName, handler) {
    return function () {
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        return handler.apply(self, args)
            .catch(function (err) {
            console.error("Error in handler: " + handlerName); //TODO: Handle logging.
            console.error(err && err.stack || err);
        });
    };
}
exports.asyncHandler = asyncHandler;
//
// Retry a failing operation a number of times.
//
function retry(operation, maxAttempts, waitTimeMS) {
    return __awaiter(this, void 0, void 0, function () {
        var lastError, result, err_1;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    if (!(maxAttempts-- > 0)) return [3 /*break*/, 6];
                    _a.label = 1;
                case 1:
                    _a.trys.push([1, 3, , 5]);
                    return [4 /*yield*/, operation()];
                case 2:
                    result = _a.sent();
                    return [2 /*return*/, result];
                case 3:
                    err_1 = _a.sent();
                    if (maxAttempts >= 1) {
                        //console.error("Operation failed, will retry.");
                        //console.error("Error:");
                        //console.error(err && err.stack || err);
                    }
                    else {
                        console.error("Operation failed, no more retries allowed.");
                    }
                    lastError = err_1;
                    return [4 /*yield*/, sleep(waitTimeMS)];
                case 4:
                    _a.sent();
                    return [3 /*break*/, 5];
                case 5: return [3 /*break*/, 0];
                case 6:
                    chai_1.assert(lastError, "Expected there to be an error!");
                    throw lastError;
            }
        });
    });
}
exports.retry = retry;
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