personae/app/mutations/characters/useDeleteCharacter.js

import { useOptimisticUpdate } from "pinia-colada-plugin-normalizer"

export const useDeleteCharacter = defineMutation(() => {
  const { transaction } = useOptimisticUpdate()

  const { mutate, ...mutation } = useMutation({
    onMutate({ id }) {
      const optionsCache = useOptionsCache()
      const tx = transaction()
      tx.remove("character", _toString(id))
      optionsCache.update()

      return { ...tx, rollbackOptions: optionsCache.rollback }
    },

    mutation: ({ id }) => useEmit("character:delete", id),

    onError: (error, _vars, { rollback, rollbackOptions }) => {
      rollback?.()
      rollbackOptions()

      console.error("[useDeleteCharacter] [onError]", error)
    },

    onSuccess: (_data, _vars, { commit }) => commit?.()
  })

  return {
    ...mutation,
    deleteCharacter: (id) => mutate({ id })
  }
})