can we wait for the resolution of a promise within switch case statement, using the keyword await? in my angular component I have the following code which crashes my application.
switch (this.status) {
case 'opened':
break;
case 'payed':
this.getIntervalStatusSubscription.unsubscribe();
this.localStorageService.storePaymentIsMade(true);
await this.dbService.addOrderPaymentResult(ProcessResult.done, this.printerVMService.getSessionId()).toPromise();
this.router.navigate(['welcome/paying/paying_accepted']);
break;
case 'closed':
this.getIntervalStatusSubscription.unsubscribe();
this.paymentSessionIsClosed = true;
await this.dbService.addOrderPaymentResult(ProcessResult.error, this.printerVMService.getSessionId()).toPromise();
this.router.navigate(['welcome']);
break;
case 'used':
this.getIntervalStatusSubscription.unsubscribe();
this.router.navigate(['welcome']);
break;
default:
console.error('status don\'t exist');
this.utils.displayAlertError(this.device.getIntervalStatus);
this.router.navigate(['welcome']);
}
After several tests, the error seems to me to come from lines starting with await.
Can you tell me what's wrong please. I would like this.dbService.addOrderPaymentResult(ProcessResult.done, this.printerVMService.getSessionId()) which returns an observable is executed synchronously before going to
this.router.navigate(['welcome/paying/paying_accepted']); that's why i chose to use toPromise() and await
Yes, you can:
async function trySwitch(status) {
switch(status) {
case 'opened':
console.log('1');
break;
case 'closed':
console.log('2');
await new Promise(r => setTimeout(r, 1000));
console.log('3');
break;
}
}
trySwitch('opened');
trySwitch('closed');