[Feature]: Custom validation for dashboard builder

[olehholovko-stripe]

Why is this needed?

Hi!

I was looking into the Go version of the SDK and noticed that DashboardBuilder.internal property is private. I was thinking about adding custom validations for the resulting dashboard. The easiest solution was to leverage SDK's structs but then implement a custom function to accept DashboardBuilder and run the validation, something along the lines of:

func ValidateDashboard(d *dashboard.DashboardBuilder) error {
    if d.Internal().Title == "" {
           return fmt.Errorf("empty title")
    }
}

I noticed that in TypeScript the internal property of the DashboardBuilder is protected readonly which allows users to extend the class and access internal field for any custom validation:

class ValidatedDashboardBuilder extends dashboard.DashboardBuilder {
    constructor(title: string) {
        super(title);
    }

    validate(): boolean {
        if (!this.internal.title) {
            console.error("Dashboard title is required.");
            return false;
        }
        return true;
    }
}

What would you like to be added?

Is it possible to generate a getter for the internal field of the dashboard.DashboardBuilder in Go please? Alternatively, a user can provide an additional custom validation function that the Build can run.

[K-Phoen]

Hey there!

Haven't given too much thought to this (yet), but why not running the validation directly on the models instead of the builders?

func ValidateDashboard(d *dashboard.Dashboard) error {
  if d.Title == "" {
    return fmt.Errorf("empty title")
  }

  return nil
}