browser/libs/angular/src/platform/services/theming/theme-builder.ts

import { ThemeType } from "@bitwarden/common/platform/enums";

import { Theme } from "./theme";

export class ThemeBuilder implements Theme {
  get effectiveTheme(): ThemeType {
    return this.configuredTheme != ThemeType.System ? this.configuredTheme : this.systemTheme;
  }

  constructor(
    readonly configuredTheme: ThemeType,
    readonly systemTheme: ThemeType,
  ) {}

  updateSystemTheme(systemTheme: ThemeType): ThemeBuilder {
    return new ThemeBuilder(this.configuredTheme, systemTheme);
  }

  updateConfiguredTheme(configuredTheme: ThemeType): ThemeBuilder {
    return new ThemeBuilder(configuredTheme, this.systemTheme);
  }
}