Bjorno
Bjorno
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Aarktype
Created by Bjorno on 8/27/2024 in #questions
Extending types similar to an interface
How would one go about extending types similar to how one would extend an interface in TypeScript? It's really the only thing I feel like is missing for ArkType to be a viable alternative. A minimal example of what I want for ArkType, but written in TypeScript: 
interface BaseTitle {
  kind: 'series' | 'episode' | 'movie';
  name: string;
  seasonNumber?: string;
  episodeNumber?: string;
  seasonCount?: number;
  episodeCount?: number; 
}

interface SeriesTitle extends BaseTitle {
  kind: 'series';
  seasonCount: number;
  episodeCount: number;
  seasonNumber?: never;
  episodeNumber?: never;
}

interface EpisodeTitle extends BaseTitle {
  kind: 'episode';
  seasonNumber: string;
  episodeNumber: string;
  seasonCount?: never;
  episodeCount?: never; 
}

interface MovieTitle extends BaseTitle {
  kind: 'movie';
  seasonNumber?: never;
  episodeNumber?: never;
  seasonCount?: never;
  episodeCount?: never; 
}

type Title = SeriesTitle | EpisodeTitle | MovieTitle;
interface BaseTitle {
  kind: 'series' | 'episode' | 'movie';
  name: string;
  seasonNumber?: string;
  episodeNumber?: string;
  seasonCount?: number;
  episodeCount?: number; 
}

interface SeriesTitle extends BaseTitle {
  kind: 'series';
  seasonCount: number;
  episodeCount: number;
  seasonNumber?: never;
  episodeNumber?: never;
}

interface EpisodeTitle extends BaseTitle {
  kind: 'episode';
  seasonNumber: string;
  episodeNumber: string;
  seasonCount?: never;
  episodeCount?: never; 
}

interface MovieTitle extends BaseTitle {
  kind: 'movie';
  seasonNumber?: never;
  episodeNumber?: never;
  seasonCount?: never;
  episodeCount?: never; 
}

type Title = SeriesTitle | EpisodeTitle | MovieTitle;
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