import { ProblemId, SolutionId, UserId } from './model'

// export function refToUserId(ref: string): UserId {
//     if (!ref.startsWith('user/')) {
//         throw new Error(`"${ref}" is not a reference to a User`)
//     }

//     return ref.slice('user/'.length)
// }

// export function refToProblemId(ref: string): ProblemId {
//     if (!ref.startsWith('problem/')) {
//         throw new Error(`"${ref}" is not a reference to a Problem`)
//     }

//     return ref.slice('problem/'.length)
// }

// export function refToSolutionId(ref: string): SolutionId {
//     if (!ref.startsWith('solution/')) {
//         throw new Error(`"${ref}" is not a reference to a Solution`)
//     }

//     return ref.slice('solution/'.length)
// }