Hi everyone ,
I am working with the plugin sqlite-porter (cordova) and SQLlite to have a prepopulated DB when we are Logged on the application. I am not “relax” with Observable, so I wanted to know what do you think about this kind of implementation, if It seems good or not, and take advice anyway.
Here is my scenario :
Login Page (if not logged) => Homepage (Launch prepopulated script for db and list Item of DB).
I have so a DBProvider, with a BehaviorSubject to subscribe to Database State :
constructor(private sqlitePorter : SQLitePorter,private sqlite: SQLite, private http : HttpClient,private platform: Platform) {
this.databaseReady = new BehaviorSubject(false);
this.platform.ready().then(() => {
this.sqlite.create({
name: 'test.db',
location: 'default'
})
.then((db: SQLiteObject) => {
this.database = db;
// TODO => set db filled in storage to no filled it again
this.fillDatabase();
})
.catch(e => console.error(e));
}
fillDatabase()
{
this.http.get('assets/datas/nav.json').subscribe(json =>
{
this.sqlitePorter.importJsonToDb(this.database, json)
.then(data => {
this.databaseReady.next(true);
})
.catch(e => console.error(e));
});
}
getDatabaseState() : Observable<{}> {
return this.databaseReady.asObservable();
}
And in A component like Home, I do :
private homeSubscriptions: Subscription;
constructor(public navCtrl: NavController, public navParams: NavParams,private dbProvider : DatabaseProvider) {
}
public ngOnInit(): void
{
this.homeSubscriptions = this.dbProvider.getDatabaseState().subscribe(rdy => {
if (rdy)
this.loadCatalogs();
}
);
}
public ngOnDestroy(): void
{
if (this.homeSubscriptions) {
console.log("unsubscribe in home");
this.homeSubscriptions.unsubscribe();
}
}
Thanks in advance for any advice, look to this code… 