How can I DRY up my service in Angular 2 - service

Question

I'm working on a Angular 2 service and I'm trying to DRY up my code. My service returns data from an RESTful API (GET request). For the moment i only send one param (auth_token) but how can i deal with a call to my service with extra params ?
Here my basic call to my service:
this._dashboardService.getData('users')
.subscribe(usersData=> {
if (usersData.ok) {
this.users= usersData.json();
});
Here is my service :
getData(data) {
let authToken = localStorage.getItem('auth_token');
let params = new URLSearchParams();
params.set('auth_token', authToken);
return this._http
.get(this._url+data,{ search: params })
.map(data=> {
if (data.status===200) {
return data;
}
});
}
I want to make this code work :
this._dashboardService.getData('users',oneParameter)
.subscribe(usersData=> {
if (usersData.ok) {
this.users= usersData.json();
});
I'm not sure how to proceed to make this (is it even possible ?)
Any ideas ?

Answer 1

You can pass your new object param and assign to another object that contains the auth_token.
getData(data, anotherParams) {
let params = new URLSearchParams();
let authToken = localStorage.getItem('auth_token');
var myObject = Object.assign({'auth_token':authToken}, anotherParams);
for (var name in myObject) {
params.set(name, myObject[name]);
}
return this._http
.get(this._url+data,{ search: params })
.map(data=> {
if (data.status===200) {
return data;
}
});
}