/**
 * @package ogre-obfuscation
 * @author cleverogre
 * @version 0.2.0
 * @since 0.1.0
 */

(() => {

    const reObfuscateElement = (element) => {
        element.outerHTML = unEncodeEmailChars(reObfuscateCore(element.getAttribute('data-content')));
    };

    const reObfuscate = (str, id) => {
        const el = document.getElementById(id);
        const newEl = document.createTextNode('');
        newEl.innerHTML = unEncodeEmailChars(reObfuscateCore(str));
        el.parentNode.replaceChild(newEl, el);
    };

    const reObfuscateCore = (str) => {
        let out = '';
        for (let i = 0; i < str.length; i++) {
            out = str.charAt(i) + out;
        }
        return out;
    };

    const unEncodeEmailChars = (str) => {
        let i = 0;
        let num = '';
        let out = '';

        while (i < str.length) {
            if (str.charAt (i) == '&') {
                num = '';
                i += 2;	/// skip &#

                while (str.charAt(i) != ';' && i < str.length) {
                    num += str.charAt(i);
                    i++;
                }

                if (str.charAt(i) == ";") {
                    i++;
                }

                out += String.fromCharCode(parseInt(num));
            } else {
                out += str.charAt(i);
                i++;
            }
        }

        return out;
    };

    document.addEventListener('DOMContentLoaded', () => {
        const elements = document.getElementsByClassName('obfuscate');
        for (let i = elements.length - 1; i >= 0; i--) {
            reObfuscateElement(elements[i]);
        }
    });

})();