personae/app/mutations/characters/useUpdateCharacter.js

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

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

  const { mutate, ...mutation } = useMutation({
    onMutate: ({ id, updates }) => {
      const optionsCache = useOptionsCache()
      const tx = transaction()
      tx.set("character", id, updates)
      optionsCache.update()

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

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

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

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

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

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