public codepeerRunInfo(): Observable<boolean> {
        let dialogRef: MdDialogRef<CodepeerRunInfoDialog>;

        dialogRef = this.dialog.open(CodepeerRunInfoDialog);

        return dialogRef.afterClosed();
    }

    public confirm(
      title: string,
      message: string,
      btnOkText: string = 'Продовжити',
      btnCancelText: string = 'Відмінити',
      viewContainerRef?: ViewContainerRef): Observable<boolean> {

        // Docs: https://material.angular.io/components/component/dialog
        // http://www.madhur.co.in/blog/2017/03/26/angular-confirmation-dialog.html

        let dialogRef: MdDialogRef<DialogComponent>;
        const dialogConfig = new MdDialogConfig();
        // FIXME dialogConfig.viewContainerRef = viewContainerRef;

        dialogRef = this.dialog.open(DialogComponent, dialogConfig);

        dialogRef.componentInstance.title = title;
        dialogRef.componentInstance.message = message;
        dialogRef.componentInstance.btnOkText = btnOkText;
        dialogRef.componentInstance.btnCancelText = btnCancelText;

        const result = dialogRef.afterClosed();

        return result;
    }

    public reviewHistory(): Observable<boolean> {
        let dialogRef: MdDialogRef<ReviewHistoryDialog>;

        dialogRef = this.dialog.open(ReviewHistoryDialog);

        return dialogRef.afterClosed();
    }

    public confirm(title: string, message: string): Observable<boolean> {

        let dialogRef: MdDialogRef<SimpleDialogComponent>;

        dialogRef = this.dialog.open(SimpleDialogComponent);
        dialogRef.componentInstance.title = title;
        dialogRef.componentInstance.message = message;

        return dialogRef.afterClosed();
    }

    confirm(viewContainerRef: ViewContainerRef, options?: Object) {
        let dialogRef: MdDialogRef<DialogConfirmComponent>;

        let config = new MdDialogConfig();
        config.viewContainerRef = viewContainerRef;

        dialogRef = this.dialog.open(DialogConfirmComponent, config);

        Object.assign(dialogRef.componentInstance, options);

        return dialogRef.afterClosed();
    }

  deleteProduct(product: any) {
    let dialogRef = this.dialog.open(DeleteDialogComponent);
    dialogRef.afterClosed().subscribe(result => {
      this.selectedOption = result;
      if (this.selectedOption === 'delete') {
        this.db.object('/products/' + product.key).remove();
        if (product.category) {
          this.db.object('/categories/' + product.payload.val().category + '/products/' + product.key).remove();
        }

        // if (product.thumbnail) {
        //   let storage = firebase.storage();
        //   let imageRef = storage.refFromURL(product.thumbnail);
        //   let me = this;
        //   imageRef.delete().then(function() {
        //     let snackBarRef = me.snackBar.open('Product deleted', 'OK!', {
        //       duration: 3000
        //     });
        //   }).catch(function(error) {
        //     console.log('error', error);
        //   });
        // } else {
          let snackBarRef = this.snackBar.open('Product deleted', 'OK!', {
            duration: 3000
          });
        // }
      }
    });
  }

 closeModal() {
   const data = {
     ambulance: {},
     valid: false
   };
   this.dialogRef.close(data);
 }

 update() {
   const data = {
     ambulance: {},
     error: {},
     valid: false
   };
   debugger
   if (this.formAmbulance.valid) {
     const ambulance = {
       _id: this.data._id, 
       car: this.formAmbulance.get('car').value,
       car_plate: this.formAmbulance.get('car_plate').value,
       type_ambulance: this.formAmbulance.get('type_ambulance').value,
       available: this.formAmbulance.get('available').value
     };
     this.formAmbulance.reset({
       car: '',
       car_plate: '',
       type_ambulance: '',
       available: ''
     });
     data.ambulance = ambulance;
     data.valid = true;
     this.dialogRef.close(data);
   }else {
     this.errorMessage = 'Los campos marcados con * son obligatorios';
   }
 }

 update() {
   const data = {
     emergency: {},
     error: {},
     valid: false
   };
   if (this.formEmergency.valid) {
     const emergency = {
       _id: this.data._id,
       date: this.formEmergency.get('date').value,
       type_emergency: this.formEmergency.get('category').value,
       driver: this.driverSelected,
       ambulance: this.ambulanceSelected,
       paramedic: this.paramedicsSelected,
       patient: this.patients,
       location: this.data.location
     };
     this.formEmergency.reset({
       driver: '',
       ambulance: '',
       paramedics: ''
     });
     data.emergency = emergency;
     data.valid = true;
     this.dialogRef.close(data);
   }else {
     this.errorMessage = 'Los campos marcados con * son obligatorios';
   }
 }

 closeModal() {
   const data = {
     paramedic: {},
     valid: false
   };
   this.dialogRef.close(data);
 }