Cloudflare Typed Repository with Prefixa

repository.ts

class RepositoryNamespace<Entity = string, Metadata = {}> {
  private readonly ns: string
  private readonly kv: KVNamespace

  constructor(kv: KVNamespace, namespace: string) {
    this.ns = namespace
    this.kv = kv
  }

  put(key: string, entity: Entity) {
    return this.kv.put(this.prefix(key), JSON.stringify(entity))
  }

  get(key: string) {
    return this.kv.get<Entity>(this.prefix(key), 'json')
  }

  getWithMetadata(key: string) {
    return this.kv.getWithMetadata<Metadata>(this.prefix(key), 'json')
  }

  findFirst(key: string) {
    return this.kv.list<Metadata>({ prefix: this.prefix(key), limit: 1 })
  }

  list(prefix: string, options: Omit<KVNamespaceListOptions, 'prefix'>) {
    return this.kv.list<Metadata>({
      ...options,
      prefix: this.prefix(prefix),
    })
  }

  private prefix = (key: string) => `${this.ns}/${key}`
}