angular push result to controller - angularjs

Question

(was not sure what to have as a title, so if you have a better suggestion, feel free to come up with one - I will correct)
I am working on an angular application where I have some menues and a search result list. I also have a document view area.
You can sort of say that the application behaves like an e-mail application.
I have a few controllers:
DateCtrl: creates a list of dates so the users can choose which dates they want to see posts from.
SourceCtrl: Creates a list of sources so the user can choose from which sources he/she wants to see posts from.
ListCtrl: The controller populating the list. The data comes from an elastic search index. The list is updated every 10-30 seconds (trying to find the best interval) by using the $interval service.
What I have tried
Sources: I have tried to make this a filter, but a user clicks two checkboxes the list is not sorted by date, but on which checkbox the user clicked first.
If it is possible to make this work as a filter, I'd rather continue doing that.
The current code is like this, it does not do what I want:
.filter("bureauFilter", function(filterService) {
return function(input) {
var selectedFilter = filterService.getFilters();
if (selectedFilter.length === 0) {
return input;
}
var out = [];
if (selectedFilter) {
for (var f = 0; f < selectedFilter.length; f++) {
for (var i = 0; i < input.length; i++) {
var myDate = input[i]._source.versioncreated;
var changedDate = dateFromString(myDate);
input[i]._source.sort = new Date(changedDate).getTime();
if (input[i]._source.copyrightholder === selectedFilter[f]) {
out.push(input[i]);
}
}
}
// return out;
// we need to sort the out array
var returnArray = out.sort(function(a,b) {
return new Date(b.versioncreated).getTime() - new Date(a.versioncreated).getTime();
});
return returnArray;
} else {
return input;
}
}
})
Date: I have found it in production that this cannot be used as a filter. The list of posts shows the latest 1000 posts, which is only a third of all posts arriving each day. So this has to be changed to a date-search.
I am trying something like this:
.service('elasticService', ['es', 'searchService', function (es, searchService) {
var esSearch = function (searchService) {
if (searchService.field === "versioncreated") {
// doing some code
} else {
// doing some other type of search
}
and a search service:
.service('searchService', function () {
var selectedField = "";
var selectedValue = "";
var setFieldAndValue = function (field, value) {
selectedField = field;
selectedValue = value;
};
var getFieldAndValue = function () {
return {
"field": selectedField,
"value": selectedValue
}
};
return {
setFieldAndValue: setFieldAndValue,
getFieldAndValue: getFieldAndValue
};
})
What I want to achieve is this:
When no dates or sources are clicked the whole list shall be shown.
When Source or Date are clicked it shall get the posts based on these selections.
I cannot use filter on Date as the application receives some 3000 posts a day and so I have to query elastic search to get the posts for the selected date.
Up until now I have put the elastic-search in the listController, but I am now refactoring so the es-search happens in a service. This so the listController will receive the correct post based on the selections the user has done.
Question is: What is the best pattern or method to use when trying to achieve this?

Answer 1

Where your data is coming from is pretty irrelevant, it's for you to do the hook up with your data source.
With regards to how to render a list:
The view would be:
<div ng-controller='MyController as myCtrl'>
<form>
<input name='searchText' ng-model='myCtrl.searchText'>
</form>
<ul>
<li ng-repeat='item in myCtrl.list | filter:myCtrl.searchText' ng-bind='item'></li>
</ul>
<button ng-click='myCtrl.doSomethingOnClick()'>
</div>
controller would be:
myApp.controller('MyController', ['ElasticSearchService',function(ElasticSearchService) {
var self = this;
self.searchText = '';
ElasticSearchService.getInitialList().then(function(list) {
self.list = list;
});
self.doSomethingOnClick = function() {
ElasticSearchService.updateList(self.searchText).then(function(list) {
self.list = list;
});
}
}]);
service would be:
myApp.service('ElasticSearchService', ['$q', function($q) {
var obj = {};
obj.getInitialList = function() {
var defer = $q.defer();
// do some elastic search stuff here
// on success
defer.resolve(esdata);
// on failure
defer.reject();
return defer.promise();
};
obj.updateList = function(param) {
var defer = $q.defer();
// do some elastic search stuff here
// on success
defer.resolve(esdata);
// on failure
defer.reject();
return defer.promise();
};
return obj;
}]);
This code has NOT been tested but gives you an outline of how you should approach this. $q is used because promises allow things to be dealt with asynchronously.