typeorm / typeorm / 19549987525

import { MixedList } from "../common/MixedList"

export class ObjectUtils {

    /**

     * Checks if given value is an object.

     * We cannot use instanceof because it has problems when running on different contexts.

     * And we don't simply use typeof because typeof null === "object".

     */

    static isObject(val: any): val is object {

        return val !== null && typeof val === "object"

    }

    /**

     * Checks if given value is an object.

     * We cannot use instanceof because it has problems when running on different contexts.

     * And we don't simply use typeof because typeof null === "object".

     */

    static isObjectWithName(val: any): val is object & { name: string } {

        return (

            val !== null && typeof val === "object" && val["name"] !== undefined

        )

    }

    /**

     * Copy the values of all of the enumerable own properties from one or more source objects to a

     * target object.

     * @param target The target object to copy to.

     * @param source The source object from which to copy properties.

     */

    static assign<T, U>(target: T, source: U): void

    /**

     * Copy the values of all of the enumerable own properties from one or more source objects to a

     * target object.

     * @param target The target object to copy to.

     * @param source1 The first source object from which to copy properties.

     * @param source2 The second source object from which to copy properties.

     */

    static assign<T, U, V>(target: T, source1: U, source2: V): void

    /**

     * Copy the values of all of the enumerable own properties from one or more source objects to a

     * target object.

     * @param target The target object to copy to.

     * @param source1 The first source object from which to copy properties.

     * @param source2 The second source object from which to copy properties.

     * @param source3 The third source object from which to copy properties.

     */

    static assign<T, U, V, W>(

        target: T,

        source1: U,

        source2: V,

        source3: W,

    ): void

    /**

     * Copy the values of all of the enumerable own properties from one or more source objects to a

     * target object.

     * @param target The target object to copy to.

     * @param sources One or more source objects from which to copy properties

     */

    static assign(target: object, ...sources: any[]): void {

        for (const source of sources) {

            for (const prop of Object.getOwnPropertyNames(source)) {

                ;(target as any)[prop] = source[prop]

            }

        }

    }

    /**

     * Converts MixedList<T> to strictly an array of its T items.

     */

    static mixedListToArray<T>(list: MixedList<T>): T[] {

        if (list !== null && typeof list === "object") {

            return Object.keys(list).map(

                (key) => (list as { [key: string]: T })[key],

            )

    }

}