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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { assert } from "../_util/assert.ts";
export function deepAssign<T, U>(target: T, source: U): T & U;
export function deepAssign<T, U, V>(
target: T,
source1: U,
source2: V,
): T & U & V;
export function deepAssign<T, U, V, W>(
target: T,
source1: U,
source2: V,
source3: W,
): T & U & V & W;
export function deepAssign(
// deno-lint-ignore no-explicit-any
target: Record<string, any>,
// deno-lint-ignore no-explicit-any
...sources: any[]
): // deno-lint-ignore ban-types
object | undefined {
for (let i = 0; i < sources.length; i++) {
const source = sources[i];
if (!source || typeof source !== `object`) {
return;
}
Object.entries(source).forEach(([key, value]): void => {
if (value instanceof Date) {
target[key] = new Date(value);
return;
}
if (!value || typeof value !== `object`) {
target[key] = value;
return;
}
if (Array.isArray(value)) {
target[key] = [];
}
// value is an Object
if (typeof target[key] !== `object` || !target[key]) {
target[key] = {};
}
assert(value);
deepAssign(target[key] as Record<string, unknown>, value);
});
}
return target;
}
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