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Wesker / Sauvegarde Messages 2s

// ==UserScript==
// @name         Sauvegarde Messages 2s
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Evitez de perdre vos messages sur 2S
// @author       Wesker
// @include      /https?://2sucres.org/*/
// @licence      MIT
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var message_input = document.getElementById('message_input')
    var mutation_number = 0

    function createCookie(cname,cvalue,exdays) {
        var d = new Date();
        d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
        var expires = "expires="+d.toUTCString();
        document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
    }

    function readCookie(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
            var c = ca[i];
            while (c.charAt(0)==' ') c = c.substring(1,c.length);
            if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
    }

    function eraseCookie(name) {
        createCookie(name,"",-1);
    }


    function clear_message(){
        if(readCookie('message_2s') != null){
            eraseCookie('message_2s')
        }
    }

    function edit_message(){

        if(readCookie('message_2s') != null){
            message_input.value = readCookie('message_2s')
        }

        message_input.addEventListener('keydown', function(){
            var a = createCookie('message_2s', message_input.value, 400);
        })
        message_input.addEventListener('keyup', function(){
            var a = createCookie('message_2s', message_input.value, 400);
        })
        message_input.addEventListener('keypress', function(){
            var a = createCookie('message_2s', message_input.value, 400);
        })
    }

    function wait_for_message_input(){

        var message_input = document.getElementById('message_input')

        var observer = new MutationObserver(function(mutation){
            mutation.forEach(function(){
                var message_input = document.getElementById('message_input')
                if(message_input != null && message_input != 'undefined'){
                    edit_message()
                    observer.disconnect()
                }
            })
        })

        var config = { attributes: true, childList: true }
        observer.observe(message_input, config)
    }


    if(message_input == null || message_input == 'undefined'){
        wait_for_message_input()
    }else{
        edit_message()
    }


    // AJAX //

    var open = window.XMLHttpRequest.prototype.open,
        send = window.XMLHttpRequest.prototype.send,
        onReadyStateChange;

    function openReplacement(method, url, async, user, password) {
        var syncMode = async !== false ? 'async' : 'sync';
        console.warn(
            'Preparing ' +
            syncMode +
            ' HTTP request : ' +
            method +
            ' ' +
            url
        );
        return open.apply(this, arguments);
    }

    function sendReplacement(data) {
        console.warn('Sending HTTP request data : ', data);
        var regex_nouveau_topic = /do=topic-create*/
        var regex_nouveau_message = /do=message-create*/

        if(data.match(regex_nouveau_topic) != null || data.match(regex_nouveau_message) != null){

            this.addEventListener('load', function(e) {
                var regex_error = /\{"error"*/
                if(this.responseText.match(regex_error) == null){
                    clear_message()
                }
                else{
                }
            })
        }
        if(this.onreadystatechange) {
            this._onreadystatechange = this.onreadystatechange;

        }
        this.onreadystatechange = onReadyStateChangeReplacement;

        return send.apply(this, arguments);
    }

    function onReadyStateChangeReplacement() {
        console.warn('HTTP request ready state changed : ' + this.readyState);
        if(this._onreadystatechange) {
            return this._onreadystatechange.apply(this, arguments);
        }
    }

window.XMLHttpRequest.prototype.open = openReplacement;
window.XMLHttpRequest.prototype.send = sendReplacement;

})();