ObjectUtil - Handy Object functions

ObjectUtil.ts

////////////////////////////////////////////////////////////////////////////////
//  Copyright(C) 2018 David Hamiter
////////////////////////////////////////////////////////////////////////////////

'use strict';

/**
* @author David Hamiter
* Static class for advanced Object manipulation, searching, comparison, etc.
*/
abstract class ObjectUtil {
    //----------------------------------------------------------------------
    //
    //  Properties
    //
    //----------------------------------------------------------------------

    

    //----------------------------------------------------------------------
    //
    //  Constructor
    //
    //----------------------------------------------------------------------

    private constructor() { } // Static class cannot be instantiated

    //----------------------------------------------------------------------
    //
    //  Methods
    //
    //----------------------------------------------------------------------

    /**
     * Finds the given sub-object in the provided object based on key.
     * This will always return the 1st match or undefined
     * @param obj  The object to search
     * @param key  The key to search for
     * @returns    The 1st matching object with the provided key or undefined
     */
    static findByKey(obj: any, key: string): any {
        //Early return
        if (obj.hasOwnProperty(key) && typeof obj[key] === 'object') {
            return obj[key];
        }
        var result: any;
        for (var prop in obj) {
            if (obj.hasOwnProperty(prop) && typeof obj[prop] === 'object') {
                result = ObjectUtil.findByKey(obj[prop], key);
                if (result) break;
            }
        }

        return result;
    }

    /**
     * Finds the given sub-object in the provided object based on the provide propName and value.
     * This will always return the 1st match or undefined
     * @param obj       The object to search
     * @param propName  The name of the property (or key) to search for
     * @param value     The value the given propName must have for a valid match to be found
     * @returns         The 1st matching object with the provided key or undefined
     */
    static findByPropValue(obj:any, propName:string, value:any): any {
        //Early return
        if (obj[propName] === value) {
            return obj;
        }
        var result: any;
        for (var prop in obj) {
            if (obj.hasOwnProperty(prop) && typeof obj[prop] === 'object') {
                result = ObjectUtil.findByPropValue(obj[prop], propName, value);
                if (result) break;
            }
        }

        return result;
    }

}