orlovedev/or-release

import type { IAppCtx } from '../types/app-ctx'
import { Either } from '../utils/either'

type Ctx = Pick<IAppCtx, 'newVersion' | 'preRelease' | 'allTags'>

export const addPreRelease = ({ newVersion, preRelease, allTags }: Ctx) => ({
    newVersion: preRelease
        ? Either.fromNullable(
                allTags.find((tag) => new RegExp(`${newVersion}-${preRelease}\\.\\d+`).test(tag)),
          )
                .chain(Either.fromNullable)
                .chain((tag) => Either.fromNullable(tag.split('.').slice(-1)[0]))
                .map(Number)
                .fold(
                    () => `${newVersion}-${preRelease}.1`,
                    (latestPreRelease) => `${newVersion}-${preRelease}.${latestPreRelease + 1}`,
                )
        : newVersion,
})