Night Mode

night-mode.user.js

// ==UserScript==
// @name         Night Mode
// @namespace    https://gist.github.com/chadlavi/d57509a35bc03305b28b3938dab0594f
// @downloadURL  https://gist.github.com/chadlavi/d57509a35bc03305b28b3938dab0594f/raw/night-mode.user.js
// @updateURL    https://gist.github.com/chadlavi/d57509a35bc03305b28b3938dab0594f/raw/night-mode.user.js
// @version      2.53
// @description  turn on night mode between the night and morning times
// @author       Chad Lavimoniere
// @include      http*://6.f*.org/*
// @grant        none
// @run-at       document-body
// ==/UserScript==

(function() {
    /*jshint multistr: true */
    'use strict';
    
    /* VARIABLES */
    var night      = '21' // this one's the start time at night
    var morning    = '6' // this one's the end time in the morning
    var link       = '#017bfe' // link color
    var background = '#000000' // page background color
    var text       = '#d2b319' // text color
    
    function setCookie(cname, cvalue, exhours) {
        var d = new Date();
        d.setTime(d.getTime() + (exhours * 60 * 60 * 1000));
        var expires = "expires="+d.toUTCString();
        document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
    }

    function getCookie(cname) {
        var name = cname + "=";
        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);
            }
            if (c.indexOf(name) == 0) {
                return c.substring(name.length, c.length);
            }
        }
        return "";
    }

    function nightMode() {
        $('*').css({'color':text,'background-color':background})
        $('input, textarea').css({'border':'1px solid '+text})
        $('a').css({'color':link})
        $('#banner_image').css({'background-color':'none','filter':'invert(1)'})
        $('#banner').css({'border-bottom': '1px dotted #d2b319'})
        $('.image-hider').css({'background-color':background,'color':text})
        $('*').css({'outline':'none'})
        $('#nightmode').click(function(){ setCookie('nightmode','off',12); history.go(0); return false; });
    }

    function nightModeInsert() {
        document.body.insertAdjacentHTML('afterbegin', '<div id="nightmode" style="\
            position: fixed; \
            top: 0; \
            right: 0; \
            border: none; \
            background-color: '+background+'; \
            color: '+text+'; \
            border: 1px solid '+text+'; \
            padding: 5px 10px; \
            cursor: pointer; \
            z-index: 2;" \
            title="click to toggle for 12 hours">night mode 🌔</div>');
    }

    var currentdate = new Date()
    var hour = currentdate.getHours();
    if(hour >= night || hour < morning) {
        nightModeInsert()
        if(getCookie('nightmode') != 'off'){
            nightMode();
        } else {
            $('#nightmode').click(function(){ setCookie('nightmode','on',12); history.go(0); return false; });
        }
    }
})();