/**
 * Parses a string for all of the numbers and
 * returns them as an integer.
 * 
 * @param num The string that should be parsed
 * @returns The number extracted from the string
 */
export function toInt(num: string): number {
    return parseInt(num.replace(/^0-9/g, ""));
}

export function hasDirectText(element: HTMLElement): boolean {
    const deep = element.cloneNode(true) as HTMLElement;
    const children = deep.children;

    // removes all children from the element node
    for (let j = children.length; j--;) {
        deep.removeChild(children[j])
    }
    // check if content contains text data
    const textContent = deep.innerText ? deep.innerText : deep.textContent;

    //Return nothing if there is no text inside activeElement excluding children
    return !(!textContent || !(textContent.trim().length));
}

// Observe DOM for changes in the HTML Dom
export const observeDOM = (obj: Node, callback: any) => {
    const validTags = ["HTML", "IFRAME"];

    // Observe for IFRAME
    const filter = (event: MutationEvent | Event) => {
        if (validTags.includes((event.target as Element).tagName)) {
            callback();
        }
    }

    obj.addEventListener('DOMNodeInserted', filter, false)
}