Develop Reference

How to get utility function from helper file on node.js server?

I have a node/express server and I'm trying to get a function from a helper file to my app.js for use. Here is the function in the helper file:
CC.CURRENT.unpack = function(value)
{
var valuesArray = value.split("~");
var valuesArrayLenght = valuesArray.length;
var mask = valuesArray[valuesArrayLenght-1];
var maskInt = parseInt(mask,16);
var unpackedCurrent = {};
var currentField = 0;
for(var property in this.FIELDS)
{
if(this.FIELDS[property] === 0)
{
unpackedCurrent[property] = valuesArray[currentField];
currentField++;
}
else if(maskInt&this.FIELDS[property])
{
//i know this is a hack, for cccagg, future code please don't hate me:(, i did this to avoid
//subscribing to trades as well in order to show the last market
if(property === 'LASTMARKET'){
unpackedCurrent[property] = valuesArray[currentField];
}else{
unpackedCurrent[property] = parseFloat(valuesArray[currentField]);
}
currentField++;
}
}
return unpackedCurrent;
};
At the bottom of that helper file I did a module.export (The helper file is 400 lines long and I don't want to export every function in it):
module.exports = {
unpackMessage: function(value) {
CCC.CURRENT.unpack(value);
}
}
Then in my app.js I called
var helperUtil = require('./helpers/ccc-streamer-utilities.js');
and finally, I called that function in app.js and console.log it:
res = helperUtil.unpackMessage(message);
console.log(res);
The problem is that the console.log gives off an undefined every time, but in this example: https://github.com/cryptoqween/cryptoqween.github.io/tree/master/streamer/current (which is not node.js) it works perfectly. So I think I am importing wrong. All I want to do is use that utility function in my app.js

The unPackMessage(val) call doesn't return anything:
module.exports = {
unpackMessage: function(value) {
CCC.CURRENT.unpack(value);
}
}
you need to return CCC.CURRENT.UNPACK(value);
module.exports = {
unpackMessage: function(value) {
return CCC.CURRENT.unpack(value);
}
}

Matching text in element with Protractor

I have an element on page. And there could be different text. I am trying to do like (code is below), and it is not printed to console.
this.checkStatus = function () {
var element = $('.message')
browser.wait(EC.visibilityOf(element), 5000).then(function () {
browser.wait(EC.textToBePresentInElement(conStatus, 'TEXT1'), 500).then(function () {
console.log('TEXT1');
})
browser.wait(EC.textToBePresentInElement(element, 'TEXT2'), 500).then(function () {
console.log('TEXT2');
})
browser.wait(EC.textToBePresentInElement(element, 'TEXT3'), 500).then(function () {
console.log('TEXT3');
})
browser.wait(EC.textToBePresentInElement(element, 'TEXT4'), 500).then(function () {
console.log('TEXT4');
})
})
return this;
}
thanks

I see two problems. first, not sure what 'constatus' is? you need to correct that. second, browser.wait will be throwing error/exceptions when it is not able to find matching condition and timeout expires, So, if your first condition doesn't meet, it will throw timeout exception and will never go to second one. Instead, try something like below
var section = "";
this.checkStatus = function () {
var element = $('.message')
browser.wait(EC.visibilityOf(element), 5000).then(function () {
browser.wait(()=>{
if(EC.textToBePresentInElement(element, 'TEXT1')){
section = "Text1";
}
else if(EC.textToBePresentInElement(element, 'TEXT2')) {
section = "Text2";
}
else if(EC.textToBePresentInElement(element, 'TEXT3')) {
section = "Text3";
}
else if(EC.textToBePresentInElement(element, 'TEXT4')) {
section = "Text4";
}
if(section !== "")
return true;
}, 5000).then(()=>{
<here you can do anything based on 'section'>
}
Note - I haven't verified compilation errors.. so check for that.

Not sure what are you up to, but you can join multiple expected conditions with "or":
var conStatus = $('.message');
var containsText1 = EC.textToBePresentInElement(conStatus, 'TEXT1');
var containsText2 = EC.textToBePresentInElement(conStatus, 'TEXT2');
var containsText3 = EC.textToBePresentInElement(conStatus, 'TEXT3');
var containsText4 = EC.textToBePresentInElement(conStatus, 'TEXT4');
browser.wait(EC.or(containsText1, containsText2, containsText3, containsText4), 5000);

Return a promise with a model and a service

I have an error with a promise.
I try to use angular-tree-dnd , but I have a problem with a promise.
from my controller :
project.getAll().then(function(results) {
var projects = results;
$scope.results = [];
angular.forEach(projects, function(result) {
$scope.results.push(project.build(result));
});
return $scope.results;
});
$scope.tree_data = $TreeDnDConvert.line2tree($scope.results, 'id', 'ParentId');
my model :
var Project = function(properties) {
// Model
this.description = null;
this.file = null;
this.name = null;
this.ParentId = null;
this.path = null;
angular.extend(this, properties);
};
Project.prototype.setModel = function(obj) {
angular.extend(this, obj);
};
Project.prototype.getAll = function() {
return ProjectService.getAll();
};
Project.prototype.build = function(data) {
var project = new Project(data);
return project;
};
my service (with $webSql) :
this.getAll = function(params) {
var projects = [];
return db.selectAll('projects').then(function(results) {
for (var i = 0; i < results.rows.length; i++) {
projects.push(results.rows.item(i));
}
return projects;
});
};
I have no error but my home is empty.
I tried this :
project.getAll().then(function(results) {
var projects = results;
$scope.results = [];
angular.forEach(projects, function(result) {
$scope.results.push(project.build(result));
});
return $scope.results;
}).then(function(array) {
$scope.tree_data = $TreeDnDConvert.line2tree(array, 'id', 'ParentId');
});
But I have this error :
angular.min.js:13550 TypeError: Cannot read property '__children__' of undefined
at Object._$initConvert.line2tree (ng-tree-dnd.js:1456)
I think that my array is empty

I suspect that this is the root of your problem:
"ParentId":"null"
Both of the items on your tree have a ParentId with the string value "null". This probably means that the dnd library is looking for a node with an ID of "null", finding nothing, and trying to access the __children__ property on that undefined value.
The solution: fix the data in your DB so that the parent IDs are actually null values and not the value "null".

Good evening)
Please set a breakpoint, or use debugger, alert, console.log with JSON.stringify(array), before your last operation:
$scope.tree_data = $TreeDnDConvert.line2tree(array, 'id', 'ParentId')
(last version with then and error).
I think you got correct array and trouble not in promises, but in line2tree syntax.

Global helper works when called in HTML, not in JS

I have the following global helper:
Template.registerHelper('results',function(){
var valuationId = this._id;
var valuation = Valuations.findOne({_id: valuationId});
var targetId = this.targetId;
var targetTicker = Companies.findOne({_id:targetId}).ticker;
var targetData = CompaniesData.findOne({ticker: targetTicker});
return {
peFy1: targetData.epsFy1 * valuation.PriceEarningsFy1,
peFy2: targetData.epsFy2 * valuation.priceEarningsFy2
}
});
When I call this helper through HTML, like so, it works fine:
<div>
{{results.peFy1}}
</div>
I am not able to display the value when calling the helper through Javascript, per this answer.
<div>
{{peFy1}}
</div>
Template.ValuationResults.helpers({
peFy1: function() {
return UI._globalHelpers.results().peFy1;
}
});
I've tried writing this in a couple other ways but none work:
return UI._globalHelpers['results']().peFy1;
return Template._globalHelpers.results().peFy1;
For what it's worth, UI._globalHelpers gives an error in Webstorm as being unresolved variables.
I thought the problem might be that I am not passing any parameters to the function, but it works fine through HTML so shouldn't be necessary. Also, adding console.log(this._id) and console.log(this.targetId) within the test helper both return correct results, so those are valid.
CORRECT CODE USING ANSWER BELOW:
getResults = function(valuationId,targetId){
var valuation = Valuations.findOne({_id: valuationId});
var targetTicker = Companies.findOne({_id:targetId}).ticker;
var targetData = CompaniesData.findOne({ticker: targetTicker});
return {
peFy1: targetData.epsFy1 * valuation.priceEarningsFy1,
peFy2: targetData.epsFy2 * valuation.priceEarningsFy2
}
};
Template.registerHelper('results',function(){
return getResults();
});
Template.Valuation.helpers({
peFy1: function() {
var valuationId = this._id;
var targetId = this.targetId;
return getResults(valuationId,targetId).peFy1;
},
peFy1: function() {
var valuationId = this._id;
var targetId = this.targetId;
return getResults(valuationId,targetId).peFy1;
}
});

Your use of UI._globalHelpers.results().peFy1 looks correct syntactically.
However as an alternative option that sidesteps the Meteor (UI._globalHelpers) api, create a standard JavaScript function like this:
getResults = function(){
var valuationId = this._id;
var valuation = Valuations.findOne({_id: valuationId});
var targetId = this.targetId;
var targetTicker = Companies.findOne({_id:targetId}).ticker;
console.log('targetId: ' + targetId);
console.log(Companies.findOne({_id:targetId})),
var targetData = CompaniesData.findOne({ticker: targetTicker});
return {
peFy1: targetData.epsFy1 * valuation.PriceEarningsFy1,
peFy2: targetData.epsFy2 * valuation.priceEarningsFy2
}
};
Template.registerHelper('results',function(){
return getResults();
});
Use results helper in templates and getResults function in JavaScript.

Javascript--Breeze Manager Not Detecting Changes

I'm using the EntityManager from Breeze for the API portion of data-binding. However, the EntityManager fails to track the changes. It will execute the code like it's supposed to but it never recognizes the changes. What's the issue? Please, refrain from saying anything that is not constructive or any personal attacks. We're here as professionals and scientists(i know i am). Here is my code:
Service:
(function () {
var serviceId = 'UWRLService';
angular.module('myApp')
.factory(serviceId, ['$q', 'breeze', 'logger', 'appSettings', UWRLService]);
// console.log('Initialized UWRL Service.js');
function UWRLService($q, breeze, logger, appSettings) {
// console.log('inside datacontext -- UWRLService');
// configure logging for this service
logger = logger.forSource(serviceId);
var logError = logger.logError;
var logSuccess = logger.logSuccess;
var logWarning = logger.logWarning;
//Setup variables with common Breeze query classes
var entityQuery = breeze.EntityQuery;
// setup breeze entity manager
var serviceName = appSettings.apiUrl + '/breeze/Uwrl/';//Where the entire service is pointing to
var manager = new breeze.EntityManager(serviceName);
var entityStateChangeAction = breeze.EntityAction.EntityStateChange;
// expose methods
var service = {
getChangesCount: getChangesCount,
saveChanges: saveChanges,
rejectChanges: rejectChanges,
getDivisions: getDivisions,
getPools: getPools,
getRandomCust: getRandomCust
//createChangeFactorEntity: createChangeFactorEntity,
};
return service;
// FUNCTION DECLARATIONS
//Attaches a new entity to the Breeze repository
//Passes the name and an array of values to seed the entity with
//function createChangeFactorEntity(entityName, initialValues) {
// var newFactor = manager.createEntity(entityName, initialValues);
// return newFactor;
//}
function getRandomCust()
{
var query = breeze.EntityQuery.from('alpha')
.where('customerNumber', '==', 1);
return executeQuery(query, 'Alpha found!');
}
function getDivisions()
{
var query = breeze.EntityQuery
.from('Divisions');
//executeQuery([query name], [query title])
return executeQuery(query, 'Divisions Found');
}
function getPools()
{
var query = breeze.EntityQuery
.from('Pools');
return executeQuery(query, 'Pools Found');
}
//Saves changes and logs exceptions
function saveChanges() {
var hasChanges = manager.hasChanges();
console.log(hasChanges);
console.log(manager.getChanges());
return manager.saveChanges()
.then(saveSucceeded)
.catch(saveFailed);
function saveSucceeded(saveResult) {
logSuccess("# of items saved = " + saveResult.entities.length, null, true);
logger.log(saveResult);
}
function saveFailed(error) {
var reason = error.message;
var detail = error.detail;
if (error.entityErrors) {
//Do nothing
} else if (detail && detail.ExceptionType &&
detail.ExceptionType.indexOf('OptimisticConcurrencyException') !== -1) {
// Concurrency error
reason =
"Another user, perhaps the server, " +
"may have deleted one or all of the todos." +
" You may have to restart the app.";
} else {
reason = "Failed to save changes: " + reason +
" You may have to restart the app.";
}
logError(reason, error, true);
throw error; //Downstream: users know it has failed
}
}
//Discards changes in Breeze Manager
function rejectChanges() {
if (manager.hasChanges()) {
count = getChangesCount();
manager.rejectChanges();
logWarning('Discarded ' + count + ' pending changes(s)', null, true);
}
}
//Returns (Nth-1) index of Breeze manager getChanges array
function getChangesCount() {
var ents = manager.getEntities();
var changes = manager.getChanges();
if (changes.length > 0)
{
alert("Changes made: " + manager.getChanges().length);
}
return manager.getChanges().length;
}
//Query Execution w/ toasters(logger)
function executeQuery(query, entityType) {
var promise = manager.executeQuery(query).then(querySucceeded, queryFailed);
return promise;
function querySucceeded(response) {
logSuccess(entityType + " query was successful", null, true);
return response.results;
}
function queryFailed(response) {
var message = response.message || entityType + " query failed";
logError(message, response, true);
throw error;
}
}
};
})()
Controller (javascript):
(function () {
'use strict';
var controllerId = 'UWRLController';
// console.log('Initialized UWRLController');
//Last item in passed array is the Controller (specific)
angular.module('myApp').controller(controllerId,
['$scope', 'UWRLService', 'logger',
'$routeParams', 'allStatesService', UWRLController]);
function UWRLController($scope, UWRLService, logger, $routeParams, allStatesService) {
// console.log('inside UWRLController');
//Loggin Initialization
logger = logger.forSource(controllerId);
var logError = logger.logError;
var logSuccess = logger.logSuccess;
var logWarning = logger.logWarning;
var uwrl = {};
$scope.uwrl = uwrl;
//Parameters we pass from Renewal Group Maintenance screen
//uwrl.PlanCode = $routeParams.PlanCode;
//uwrl.Contract = $routeParams.ContractNumber;
//uwrl.Mch = $routeParams.Mch;
//Functions in Javascript Controller
//[scope].[property] = [function name]
uwrl.saveChanges = save;
uwrl.discardChanges = discardChanges;
uwrl.changesCount = changesCount();
//uwrl.select = select;
init();//Initialize all customer related data for page
function init()
{
gettingDivisions();//Initialze getting data from Division's table through UWRL-service.js
getAllFiftyStates();
gettingPools();
gettingRandom();
}
function gettingRandom()
{
UWRLService.getRandomCust()
.then(function(alpha)
{
uwrl.alpha = alpha;
uwrl.beta = uwrl.alpha[0].customerName;
});
}
function gettingDivisions()
{
UWRLService.getDivisions()
.then(function (divisionNumber) {
uwrl.divisionNumber = divisionNumber;
});
}
function getAllFiftyStates()
{
allStatesService.getStates()
.then(function (allStates)
{
uwrl.allStates = allStates;
});
}
function gettingPools()
{
UWRLService.getPools()
.then(function (poolNumber)
{
uwrl.poolNumber = poolNumber;
});
}
//Clicking the Drop-down Button
//function select(change) {
// this.MchMcpPlanDesignId = change.MchMcpPlanDesign.MchMcpPlanDesignId;
// change.expanded = !change.expanded; //toggle back and forth
//}
////.then = [if] success
////.fail = failure
////.finally = always executed despite evaluated conditionals
//function getPlans() {//returns a promise
// uwrl.loadingPlans = true;
// UWRLService.getChangeFactors(uwrl.Mch, uwrl.Contract, uwrl.PlanCode)
// .then(function (deltaChangeFactor) {
// uwrl.deltaChangeFactor = deltaChangeFactor;
// }).finally(function () { uwrl.loadingPlans = false; });
//}
////Returns all data in ChangeFactorType table
//function getChangeFactorTypes() {
// UWRLService.getTypes().then(function (changeFactorTypes) {
// uwrl.changeFactorTypes = changeFactorTypes;
// });
//}
//Clicking on Save Button
function save() {
console.log('Save Button Clicked!');
//Validation -- checks for empty values
//if (uwrl.changeFactorType != null && uwrl.effectiveDate != null &&
// uwrl.changeFactorAmount != null) {
// //Adds a new Breeze Entity for ChangeFactor table in SQL database
// UWRLService.createChangeFactorEntity('ChangeFactor',
// {
// MchMcpPlanDesignId: this.MchMcpPlanDesignId,
// ChangeFactorType: uwrl.changeFactorType,
// EffectiveDate: uwrl.effectiveDate,
// ChangeFactorAmount: uwrl.changeFactorAmount
// });
//}
//Saves to Breeze Manager
//Must hit Art's ESB service -- to be researched
UWRLService.saveChanges();
}
//Gets rid of changes and logs it
function discardChanges() {
console.log('Discard Button Clicked!');
UWRLService.rejectChanges();
}
//Notifies user(s) of changes made that are
//either: savable, discardable
function changesCount() {
// console.log("Changes Made: " + UWRLService.getChangesCount)//for debugging purposes
return UWRLService.getChangesCount;
}
};
})();

The answer is to make sure to effect the model. For example: uwrl.alpha[0].customerName instead of urwl.beta