I have the following problem.
In a function I have a promise as a return type. This function is in the class Hierarchy.
updateNodeValues(entity: String, data: {}): Promise<any>{
let jsonBody = JSON.stringify(data);
let url = environment.endpointCore + '/api/' + entity + '/' + data['id'];
return this.http.put(url, jsonBody, this.options)
.toPromise()
.then(response => {
return response;
})
.catch(this.handleError);
}
This function is in class node.
onSubmit(): void{
var currentForm = this.form.value;
var entityName = this.inflection.classify(this.node.type).toLowerCase();
var requiredData = {};
for(var i = 0; i < this.formItems.length; i++){
this.formItems[i].value = currentForm[Object.keys(currentForm)[i]];
}
for(var i=0; i<this.formItems.length; i++){
requiredData[this.globalService.camelize(this.formItems[i].label)] = this.formItems[i].value
}
Promise.resolve(this.hierarchyService.updateNodeValues(entityName, requiredData)).then(response => {
alert(response.ok);
if(response.ok){
this.globalService.showSuccessMessage('Values updated');
this.refreshGui(requiredData);
}
});
this.editMode = false;
}
The problem is that when i try to resolve promise and invoke this.refreshGui(requireddata) nothing is happening. I have read about how the fat arrow is preserving the 'context' of this, and I do not understand why invoking this method is not doing anything, while invoking successMessage produces expected outcome.
The method that I am invoking looks like this, and it is also in the class node.
private refreshGui(data: {}){
this._node.data = data;
this.objectProperties = new Array();
this.nodeChildren = new Array();
for (var property in data) {
var propertyValue = data[property];
if (propertyValue instanceof Array) {
this.nodeChildren.push({label: property, value: "total: ".concat(propertyValue.length.toString())});
} else {
this.objectProperties.push({label: property, value: propertyValue});
}
}
}
The solution that I found to be working was to implement custom event. The problem was that within the async callback resolution, the context of what this is would "get lost". The fat arrow enabled me to invoke class method with this, but the properties within the would be "lost". Because of this reason I have took the logic from the method, and put it in the callback part and set expected and needed results in some variable. This variable was passed to my custom event and set to class variable in the custom event handler appropriately.
Related
I'm making a plugin for Aurelia and need a class decorator that
adds attributes to the new object instance, and
calls an external function with the new object as an argument.
I've looked through examples, and so far I've put together ("pseudo-ish" code)
return function addAndCall(target: any): any {
var original = target;
var newConstructor = function (...args) {
original.apply(this, args);
this.newAttribute = "object instance value";
ExternalModule.externalFunction(this);
};
newConstructor.prototype = Object.create(original.prototype);
newConstructor.prototype.constructor = original;
return <any>newConstructor;
}
but
I'm not entirely clear on the details here (or what is actually needed), and
it might not work properly since I'm getting Aurelia errors when using objects instantiated from classes with this decorator (and I suspect it's my decorator rather than the Aurelia framework that's buggy).
Any help and explanation would be greatly appreciated!
Why not just assign those properties to the prototype, and subsequently assign to the instance on first invocation
// decorator
function addAndCall(cb: Function, newField: string) {
// cb is now available in the decorator
return function(ctor: Function): void {
Object.defineProperty(ctor.prototype, newField, {
value: function(...args: any[]) {
return Object.defineProperty(this, newField, {
value: function(...args: any[]) {
console.log(newField, ...args);
}
})[newField](...args);
}
});
cb(ctor);
}
}
let callMe = (decoratedCtor) => console.log(decoratedCtor);
#addAndCall(callMe, 'propertyName')
class AddToMe {}
let addToMe = new AddToMe();
(<any>addToMe).propertyName(1, 2);
Here's a working version:
function addAndCall(target: any) {
var original = target;
function construct(constructor, args) {
var c: any = function () {
this.newAttribute = "object instance value";
ExternalModule.externalFunction(this);
return constructor.apply(this, args);;
}
c.prototype = constructor.prototype;
return new c();
}
var f: any = function (...args) {
return construct(original, args);
}
f.prototype = original.prototype;
return f;
}
(code in playground)
I have a fn that inherit an existing fn ( take Angular1 $q for example )
//$q original behavior
var defer = $q.defer();
defer.promise.then(function(result){})
//or
$q( (resolve, reject) => {
//promise execution here
}).then(function(result){});
If I want to decorate it, I would do :
var Qdecorator = function($delegate) {
var Q = function(resolver:any): any {
//do some extra stuff here
return $delegate.apply($delegate, arguments);
}
//Assign the static methods here:
Q.defer = function() {
//do some stuff
return $delegate.defer.apply($delegate, []);
}
//same goes for race, when, resole reject and so on
return Q;
}
Problem is that typescript complains about
Property defer, race, when, resolve, etc... does not exist on type '(resolver: any) => any'
I tried to use the IQService, and IPromise with no luck, btu I'd like to raise a more global question :
How do I define late static methods on function() that return an object without using new
I am copying pasting the answer to my question from this link:
https://www.typescriptlang.org/docs/handbook/interfaces.html
interface Counter {
(start: number): string;
interval: number;
reset(): void;
}
function getCounter(): Counter {
let counter = <Counter>function (start: number) { };
counter.interval = 123;
counter.reset = function () { };
return counter;
}
let c = getCounter();
c(10);
c.reset();
c.interval = 5.0;
I have created a taskpane addin for word that runs a search and displays information about the results as a list to the user.
When the user clicks on an item in the list I want to select the range in word to show the user the location of the item.
The addin will then allow the user to perform additional tasks on the range, for example change the font colour.
I am able to run the search and get ranges for display using the function below:
function runSearch(textToFind) {
var items = [];
return Word.run(function(context) {
var options = Word.SearchOptions.newObject(context);
options.matchWildCards = false;
var rangesFind = context.document.body.search(textToFind, options);
context.load(rangesFind, 'text, font, style');
return context.sync().then(function() {
for (var i = 0; i < rangesFind.items.length; i++) {
items.push(rangesFind.items[i]);
context.trackedObjects.add(rangesFind.items[i]);
}
return context.sync();
});
})
.then(function() {
return items;
});
};
However I am having difficulty selecting the range on user click.
I have tried using the ranges context:
function selectRange(range){
range.select();
return range.context.sync();
}
Or using the range in a new Word.run context:
function selectRange(range){
return Word.run(function(context) {
context.load(range);
return context.sync().then(function(){
range.select();
return context.sync();
});
});
}
I have come across a potential method that involves creating a content control for each search result and then reloading all the content controls in the selectRangefunction in the new context and finding the matching control, but that seems very inefficient when I have the range already.
What is the best method for reusing a range across different Word.run contexts?
You cannot use an object across Word.run invocations. Word.run creates a new context every time that it's invoked, whereas the original object is tied to its own context, creating a mismatch.
That being said, you absolutely can, from within a Word.run, add the objects you desire to context.trackedObjects.add(obj), and they will remain as working objects even after Word.run finishes executing. By "working objects" I mean that their path will not get invalidated (think something similar to garbage collection, but for remote objects).
Once you have such object (and it looks above like you do), you should be able to call
range.select();
range.context.sync().catch(...);
If it's not working for you, can you provide an example of the error you're getting?
For completeness sake, I should note that once you add objects to the trackedObjects collection, you're effectively taking memory management of those objects into your own hands. This means that if you don't properly release the memory, you will be slowing down Word by bogging down its memory / range-adjustment chain. So once you're done using the tracked object(s), you should call obj.context.trackedObjects.remove(obj), followed by obj.context.sync(). Don't forget the last part - if you don't do a sync, your request to remove the tracked objects will not be dispatched, and you'll continue to use up the memory.
======= Update 1 =======
Tom, thanks for providing the error message. It looks like this might be a bug in the Word implementation of the APIs -- I'll follow up on that, and someone might reach out to you if there's more questions.
From a conceptual standpoint, you are absolutely on the right path -- and the following does work in Excel, for example:
var range;
Excel.run(function (ctx) {
var sheet = ctx.workbook.worksheets.getActiveWorksheet();
range = sheet.getRange("A5");
range.values = [[5]];
ctx.trackedObjects.add(range);
return ctx.sync();
})
.then(function(){
setTimeout(function() {
range.select();
range.context.trackedObjects.remove(range);
range.context.sync();
}, 2000);
})
.catch(function (error) {
showMessage("Error: " + error);
});
======= Update 2 =======
It turns out there is indeed a bug in the product. However, the good news is that it's easy to fix with a JavaScript-only fix, and in fact we'll do so in the next couple of weeks, updating the CDN.
With the fix, the following code works:
var paragraph;
Word.run(function (ctx) {
var p = ctx.document.body.paragraphs.first;
paragraph = p.next;
ctx.trackedObjects.add(paragraph);
return ctx.sync();
})
.then(function(){
setTimeout(function() {
paragraph.select();
paragraph.context.trackedObjects.remove(paragraph);
paragraph.context.sync()
.then(function() {
console.log("Done");
})
.catch(handleError);
}, 2000);
})
.catch(handleError);
function handleError (error) {
console.log('Error: ' + JSON.stringify(error));
if (error instanceof OfficeExtension.Error) {
console.log('Debug info: ' + JSON.stringify(error.debugInfo));
}
}
Want even better news? Until the CDN is updated, you can use the code below to "patch" the JavaScript library and make the code above run. You should run this code some time after Office.js has already loaded (i.e., within your Office.initialize function), and before you do a Word.run.
var TrackedObjects = (function () {
function TrackedObjects(context) {
this._autoCleanupList = {};
this.m_context = context;
}
TrackedObjects.prototype.add = function (param) {
var _this = this;
if (Array.isArray(param)) {
param.forEach(function (item) { return _this._addCommon(item, true); });
}
else {
this._addCommon(param, true);
}
};
TrackedObjects.prototype._autoAdd = function (object) {
this._addCommon(object, false);
this._autoCleanupList[object._objectPath.objectPathInfo.Id] = object;
};
TrackedObjects.prototype._addCommon = function (object, isExplicitlyAdded) {
if (object[OfficeExtension.Constants.isTracked]) {
if (isExplicitlyAdded && this.m_context._autoCleanup) {
delete this._autoCleanupList[object._objectPath.objectPathInfo.Id];
}
return;
}
var referenceId = object[OfficeExtension.Constants.referenceId];
if (OfficeExtension.Utility.isNullOrEmptyString(referenceId) && object._KeepReference) {
object._KeepReference();
OfficeExtension.ActionFactory.createInstantiateAction(this.m_context, object);
if (isExplicitlyAdded && this.m_context._autoCleanup) {
delete this._autoCleanupList[object._objectPath.objectPathInfo.Id];
}
object[OfficeExtension.Constants.isTracked] = true;
}
};
TrackedObjects.prototype.remove = function (param) {
var _this = this;
if (Array.isArray(param)) {
param.forEach(function (item) { return _this._removeCommon(item); });
}
else {
this._removeCommon(param);
}
};
TrackedObjects.prototype._removeCommon = function (object) {
var referenceId = object[OfficeExtension.Constants.referenceId];
if (!OfficeExtension.Utility.isNullOrEmptyString(referenceId)) {
var rootObject = this.m_context._rootObject;
if (rootObject._RemoveReference) {
rootObject._RemoveReference(referenceId);
}
delete object[OfficeExtension.Constants.isTracked];
}
};
TrackedObjects.prototype._retrieveAndClearAutoCleanupList = function () {
var list = this._autoCleanupList;
this._autoCleanupList = {};
return list;
};
return TrackedObjects;
}());
OfficeExtension.TrackedObjects = TrackedObjects;
Hope this helps!
~ Michael Zlatkovsky, developer on Office Extensibility team, MSFT
In addition to the TrackedObjects fix the runSearch method needed updating to get the range of the searchResult rather than using the searchResult directly.
function runSearch(textToFind) {
var items = [];
return Word.run(function(context) {
var options = Word.SearchOptions.newObject(context);
options.matchWildCards = false;
var rangesFind = context.document.body.search(textToFind, options);
context.load(rangesFind);
return context.sync().then(function() {
for (var i = 0; i < rangesFind.items.length; i++) {
var range = rangesFind.items[i].getRange();
context.load(range, 'text');
items.push(range);
context.trackedObjects.add(items[items.length-1]);
}
return context.sync();
});
})
.then(function() {
return items;
});
};
Hi I'm trying to filter an observable array of data fetched via a HTTP request on keypress of the SearchBar.
I managed to get the SearchBar property change to work but I can't seem to figure out what I'm doing wrong in the filtering logic.
Ideally I want to update the list as I type in the search term in the SearchBar. I've searched the API on the Telerik site, there wasn't really any examples I could find.
XML
<Page loaded="pageLoaded">
<ActivityIndicator busy="{{ isLoading }}" />
<ActionBar title="People">
</ActionBar>
<GridLayout>
<StackLayout>
<SearchBar id="searchBar" hint="Search for someone"></SearchBar>
<ListView items="{{ peopleList }}" itemTap="showDetail">
<ListView.itemTemplate>
<StackLayout>
<Label text="{{ fullName }}" horiztonalAlignment="left" verticalAlignment="center"></Label>
<Label text="{{ company }}" class="info"></Label>
</StackLayout>
</ListView.itemTemplate>
</ListView>
</StackLayout>
</GridLayout>
</Page>
JS
var frames = require("ui/frame");
var Observable = require("data/observable").Observable;
var PeopleListViewModel = require("../../shared/people-viewModel");
var activityIndicatorModule = require("ui/activity-indicator");
var page;
var userkey;
var peopleList = new PeopleListViewModel([]);
var pageData = new Observable({ peopleList: peopleList });
exports.pageLoaded = function(args) {
page = args.object;
page.bindingContext = pageData;
userkey = userkey || page.navigationContext.userkey;
peopleList.load(userkey); // fetch data from the backend
var searchBar = page.getViewById("searchBar");
searchBar.on("propertyChange", function (args) {
var searchText = args.object.text;
if (searchText === "") {
// NOT SURE WHAT TO DO HERE.
} else {
peopleList.filter(function (element, index, array) {
// DOESN"T WORK PROPERLY
console.log("element: ", JSON.stringify(element));
return element.fullName == searchText;
});
console.log("Text types: ", searchText);
}
});
};
exports.showDetail = function(args) {
var person = peopleList.getItem(args.index);
var navigateEntry = {
moduleName: "views/people/people-detail",
context: { person: person },
animated: false
};
frames.topmost().navigate(navigateEntry);
};
PeopleListViewModel.js
var config = require("./config");
var fetchModule = require("fetch");
var ObservableArray = require("data/observable-array").ObservableArray;
function PeopleListViewModel(people) {
var viewModel = new ObservableArray(people);
viewModel.load = function (userKey) {
return fetchModule.fetch(config.baseUrl + "/api/people/all/" + userKey)
.then(function (response) {
return response.json();
})
.then(function (data) {
data.forEach(function (person) {
viewModel.push(person);
});
}, function (error) {
console.log("Error: ", error);
});
};
viewModel.empty = function () {
while (viewModel.length) {
viewModel.pop();
}
};
return viewModel;
}
function handleErrors(response) {
if (!response.ok) {
console.log("Error occurred");
}
}
module.exports = PeopleListViewModel;
Updated people-list
var frames = require("ui/frame");
var Observable = require("data/observable").Observable;
var ObservableArray = require("data/observable-array").ObservableArray;
var PeopleListViewModel = require("../../shared/people-viewModel");
var activityIndicatorModule = require("ui/activity-indicator");
var page;
var userkey;
var peopleList = new PeopleListViewModel([]);
var pageData = new Observable({ peopleList: peopleList });
var resultList = new ObservableArray([]);
exports.pageLoaded = function(args) {
page = args.object;
page.bindingContext = pageData;
userkey = userkey || page.navigationContext.userkey;
peopleList.load(userkey);
var searchBar = page.getViewById("searchBar");
searchBar.on("propertyChange", function (args) {
var searchText = args.object.text;
if (searchText === "") {
} else {
while (resultList.length > 0) {
resultList.pop();
}
peopleList.forEach(function (element) {
if (element.fullName === searchText) {
resultList.push(element);
}
});
}
});
};
I had the same issue. If you want to filter your data after every character has changed in search-bar you can try my solution.
Definitions
My playerList is your peopleList. This is the data from view-model.
resultList is an array where the data will be pushed.
var observableArrayModule = require("data/observable-array").ObservableArray;
var playerList = new PlayerListViewModel([]);
var resultList = new observableArrayModule([]);
var pageData = new observableModule.Observable({
resultList: resultList,
player: ""
});
Inside expors.loaded()
page = args.object;
searchBar = page.getViewById("search-bar");
page.bindingContext = pageData;
Load Initial Data - inside expors.loaded()
We are loading initial data when user navigates to the screen for the first time. We are also pushing the same data to resultList since we are using {{resultList}} in xml. You can add loadingIndicator while the list is populated.
playerList
.load()
.then(function() {
setTimeout(function() {
playerList.forEach(function (element) {
pageData.resultList.push(element);
});
}, 1000);
})
.catch(function(error) {
dialogsModule.alert({
message: "An error occurred while loading players.",
okButtonText: "OK"
});
});
Clear autofocus - inside expors.loaded()
This is to prevent keyboard from opening on initial screen navigation.
if (searchBar.ios) {
searchBar.ios.endEditing(true);
} else if (searchBar.android) {
searchBar.android.clearFocus();
}
Search data when character has changed - inside expors.loaded()
I am calling filter functionality. Lodash _.debounce function is used to delay looping through resultList array. Without it, the app would loop every time letter is typed. Now we are waiting for user to stop typing to start looping.
searchBar.on('propertyChange', _.debounce(searchList, 500));
searchList Function
This is the actual loop. You can change element.name for your needs.
function searchList(args) {
var searchText = args.object.text;
while(resultList.length > 0) {
resultList.pop();
}
playerList.forEach(function (element) {
if (element.name.toLowerCase().indexOf(searchText) >= 0) {
resultList.push(element);
}
});
}
Hide keyboard if search-bar is cleared - inside exports.loaded()
And finally we want to hide the keyboard if user clears the search-bar.
searchBar.on(searchBarModule.SearchBar.clearEvent, function (args) {
setTimeout(function() {
searchBar.dismissSoftInput();
}, 10);
});
PS
You probably solved your issue, but this could help someone else in the future.
Okay so your problem is a Javascript problem than a NativeScript problem. For the sake of this problem, think of observable arrays as just your ordinary arrays.
In your JS you're creating a new PeopleListViewModel which you're then attaching to the bindingContext via the pageData object. So far so good. Then you're calling the load method on the PeopleListViewModel (It returns a promise which you're not really doing anything with but for this specific problem it doesn't matter).
However, when text is inputed you're not really doing anything. This is your code:
peopleList.filter(function (element, index, array) {
// DOESN"T WORK PROPERLY
console.log("element: ", JSON.stringify(element));
return element.fullName == searchText;
});
peopleList is an instance of PeopleListViewModel which returns an ObservableArray. The ObservableArray does indeed have a method called filter (which works just like filter of a regular array. Check out the NativeScript documentation and Javascript documentation of filter).
What you need to understand here is that filter returns a new array with the filtered results. Doing peopleList.filter() will send that new array into empty space. You want to var yourNewFilteredArray = peopleList.filter(). But you don't really want to redefine the array bound to the binding context, you want to modify the content of it.
Here's an example of how you could do that:
/*
* Attach a new obsersable array to the binding context.
* you can prepopulate it with the data from the
* PeopleListViewModel if you want to
*/
var resultList = new ObservableArray([]);
var pageData = new Observable({ resultList: resultList });
/*
* Then on search/filter you want to modify this new
* array. Here I first remove every item in it and then
* push matching items to it.
*/
searchBar.on("propertyChange", function (args) {
var searchText = args.object.text;
// ...
while(resultList.length > 0) {
resultList.pop();
}
peopleList.forEach(function (element) {
if (element.fullName === searchText) {
resultList.push(element);
}
});
});
I'm trying to get type fields for each attribute of my entities. Quering Orion and getting entities is not the problem (I do this through NGSI Source widget) but the way getting these parameters.
From NGSI Source (usual suscription to Orion instance):
var doInitialSubscription = function doInitialSubscription() {
this.subscriptionId = null;
this.ngsi_server = MashupPlatform.prefs.get('ngsi_server');
this.ngsi_proxy = MashupPlatform.prefs.get('ngsi_proxy');
this.connection = new NGSI.Connection(this.ngsi_server, {
ngsi_proxy_url: this.ngsi_proxy
});
var types = MashupPlatform.prefs.get('ngsi_entities').split(new RegExp(',\\s*'));
var entityIdList = [];
var entityId;
for (var i = 0; i < types.length; i++) {
entityId = {
id: '.*',
type: types[i],
isPattern: true
};
entityIdList.push(entityId);
}
var attributeList = null;
var duration = 'PT3H';
var throttling = null;
var notifyConditions = [{
'type': 'ONCHANGE',
'condValues': MashupPlatform.prefs.get('ngsi_update_attributes').split(new RegExp(',\\s*'))
}];
var options = {
flat: true,
onNotify: handlerReceiveEntity.bind(this),
onSuccess: function (data) {
this.subscriptionId = data.subscriptionId;
this.refresh_interval = setInterval(refreshNGSISubscription.bind(this), 1000 * 60 * 60 * 2); // each 2 hours
window.addEventListener("beforeunload", function () {
this.connection.cancelSubscription(this.subscriptionId);
}.bind(this));
}.bind(this)
};
this.connection.createSubscription(entityIdList, attributeList, duration, throttling, notifyConditions, options);
};
var handlerReceiveEntity = function handlerReceiveEntity(data) {
for (var entityId in data.elements) {
MashupPlatform.wiring.pushEvent("entityOutput", JSON.stringify(data.elements[entityId]));
}
};
To MyWidget:
MashupPlatform.wiring.registerCallback("entityInput", function (entityString) {
var entity;
entity = JSON.parse(entityString);
id = entity.id;
type = entity.type;
for(var attr in entity){
attribute = entity[attr];
}
I'm trying to code something similar to obtain the value of type fields. How can I do that? (I'm sure it's quite easy...)
You cannot make use of the current NGSI source operator implementation (at least v3.0.2) if you want to get the type metadata of attributes as the NGSI source makes use of the flat option (discarding that info).
We are studying updating this operator to allow creating subscriptions without using the flat option. The main problem here is that other components expect the data provided by this operator being provided in the format returned when using the flat option. I will update this answer after analysing deeper the issue.