| 1 | import * as P from "effect/Predicate"; |
| 2 | |
| 3 | export type DeepPartial<T> = T extends readonly (infer U)[] |
| 4 | ? readonly DeepPartial<U>[] |
| 5 | : T extends object |
| 6 | ? { [K in keyof T]?: DeepPartial<T[K]> } |
| 7 | : T; |
| 8 | |
| 9 | export function deepMerge<T extends Record<string, unknown>>(current: T, patch: DeepPartial<T>): T { |
| 10 | if (!P.isObject(current) || !P.isObject(patch)) { |
| 11 | return patch as T; |
| 12 | } |
| 13 | |
| 14 | const next = { ...current } as Record<string, unknown>; |
| 15 | for (const [key, value] of Object.entries(patch)) { |
| 16 | if (value === undefined) continue; |
| 17 | |
| 18 | const existing = next[key]; |
| 19 | next[key] = P.isObject(existing) && P.isObject(value) ? deepMerge(existing, value) : value; |
| 20 | } |
| 21 | |
| 22 | return next as T; |
| 23 | } |