import {
die,
isDraft,
shallowCopy,
each,
DRAFT_STATE,
set,
ImmerState,
isDraftable,
isFrozen
} from "../internal"
/** Takes a snapshot of the current state of a draft and finalizes it (but without freezing). This is a great utility to print the current state during debugging (no Proxies in the way). The output of current can also be safely leaked outside the producer. */
export function current<T>(value: T): T
export function current(value: any): any {
if (!isDraft(value)) die(10, value)
return currentImpl(value)
}
function currentImpl(value: any): any {
if (!isDraftable(value) || isFrozen(value)) return value
const state: ImmerState | undefined = value[DRAFT_STATE]
let copy: any
if (state) {
if (!state.modified_) return state.base_
// Optimization: avoid generating new drafts during copying
state.finalized_ = true
copy = shallowCopy(value, state.scope_.immer_.useStrictShallowCopy_)
} else {
copy = shallowCopy(value, true)
}
// recurse
each(copy, (key, childValue) => {
set(copy, key, currentImpl(childValue))
})
if (state) {
state.finalized_ = false
}
return copy
}