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rOACCT/node_modules/immer/src/core/finalize.ts
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finalize.ts
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import {
ImmerScope,
DRAFT_STATE,
isDraftable,
NOTHING,
PatchPath,
each,
has,
freeze,
ImmerState,
isDraft,
SetState,
set,
ProxyType,
getPlugin,
die,
revokeScope,
isFrozen,
shallowCopy
} from "../internal"
export function processResult(result: any, scope: ImmerScope) {
scope.unfinalizedDrafts_ = scope.drafts_.length
const baseDraft = scope.drafts_![0]
const isReplaced = result !== undefined && result !== baseDraft
if (!scope.immer_.useProxies_)
getPlugin("ES5").willFinalizeES5_(scope, result, isReplaced)
if (isReplaced) {
if (baseDraft[DRAFT_STATE].modified_) {
revokeScope(scope)
die(4)
}
if (isDraftable(result)) {
// Finalize the result in case it contains (or is) a subset of the draft.
result = finalize(scope, result)
if (!scope.parent_) maybeFreeze(scope, result)
}
if (scope.patches_) {
getPlugin("Patches").generateReplacementPatches_(
baseDraft[DRAFT_STATE].base_,
result,
scope.patches_,
scope.inversePatches_!
)
}
} else {
// Finalize the base draft.
result = finalize(scope, baseDraft, [])
}
revokeScope(scope)
if (scope.patches_) {
scope.patchListener_!(scope.patches_, scope.inversePatches_!)
}
return result !== NOTHING ? result : undefined
}
function finalize(rootScope: ImmerScope, value: any, path?: PatchPath) {
// Don't recurse in tho recursive data structures
if (isFrozen(value)) return value
const state: ImmerState = value[DRAFT_STATE]
// A plain object, might need freezing, might contain drafts
if (!state) {
each(
value,
(key, childValue) =>
finalizeProperty(rootScope, state, value, key, childValue, path),
true // See #590, don't recurse into non-enumerable of non drafted objects
)
return value
}
// Never finalize drafts owned by another scope.
if (state.scope_ !== rootScope) return value
// Unmodified draft, return the (frozen) original
if (!state.modified_) {
maybeFreeze(rootScope, state.base_, true)
return state.base_
}
// Not finalized yet, let's do that now
if (!state.finalized_) {
state.finalized_ = true
state.scope_.unfinalizedDrafts_--
const result =
// For ES5, create a good copy from the draft first, with added keys and without deleted keys.
state.type_ === ProxyType.ES5Object || state.type_ === ProxyType.ES5Array
? (state.copy_ = shallowCopy(state.draft_))
: state.copy_
// Finalize all children of the copy
// For sets we clone before iterating, otherwise we can get in endless loop due to modifying during iteration, see #628
// Although the original test case doesn't seem valid anyway, so if this in the way we can turn the next line
// back to each(result, ....)
each(
state.type_ === ProxyType.Set ? new Set(result) : result,
(key, childValue) =>
finalizeProperty(rootScope, state, result, key, childValue, path)
)
// everything inside is frozen, we can freeze here
maybeFreeze(rootScope, result, false)
// first time finalizing, let's create those patches
if (path && rootScope.patches_) {
getPlugin("Patches").generatePatches_(
state,
path,
rootScope.patches_,
rootScope.inversePatches_!
)
}
}
return state.copy_
}
function finalizeProperty(
rootScope: ImmerScope,
parentState: undefined | ImmerState,
targetObject: any,
prop: string | number,
childValue: any,
rootPath?: PatchPath
) {
if (__DEV__ && childValue === targetObject) die(5)
if (isDraft(childValue)) {
const path =
rootPath &&
parentState &&
parentState!.type_ !== ProxyType.Set && // Set objects are atomic since they have no keys.
!has((parentState as Exclude<ImmerState, SetState>).assigned_!, prop) // Skip deep patches for assigned keys.
? rootPath!.concat(prop)
: undefined
// Drafts owned by `scope` are finalized here.
const res = finalize(rootScope, childValue, path)
set(targetObject, prop, res)
// Drafts from another scope must prevented to be frozen
// if we got a draft back from finalize, we're in a nested produce and shouldn't freeze
if (isDraft(res)) {
rootScope.canAutoFreeze_ = false
} else return
}
// Search new objects for unfinalized drafts. Frozen objects should never contain drafts.
if (isDraftable(childValue) && !isFrozen(childValue)) {
if (!rootScope.immer_.autoFreeze_ && rootScope.unfinalizedDrafts_ < 1) {
// optimization: if an object is not a draft, and we don't have to
// deepfreeze everything, and we are sure that no drafts are left in the remaining object
// cause we saw and finalized all drafts already; we can stop visiting the rest of the tree.
// This benefits especially adding large data tree's without further processing.
// See add-data.js perf test
return
}
finalize(rootScope, childValue)
// immer deep freezes plain objects, so if there is no parent state, we freeze as well
if (!parentState || !parentState.scope_.parent_)
maybeFreeze(rootScope, childValue)
}
}
function maybeFreeze(scope: ImmerScope, value: any, deep = false) {
if (scope.immer_.autoFreeze_ && scope.canAutoFreeze_) {
freeze(value, deep)
}
}
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