// ==UserScript==
// @name         Remove Economist Paywall 2023
// @namespace    SomeCheapGuy
// @version      0.1
// @description  Get rid of the paywall for economist.com, copied from chrome extension here: https://github.com/vivek9patel/economist.com-unlocked/blob/master/main.js
// @author       SomeCheapGuy
// @license MIT
// @match        https://www.economist.com/*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    let loadCustomPage = () => {
        var xhr = new XMLHttpRequest();

        xhr.open("GET", window.location.href, true);

        xhr.onerror = function () {
            document.documentElement.innerHTML = "Error getting Page!";
        };

        xhr.send()

        xhr.onreadystatechange = function() {
            if (this.readyState == 4 && this.status == 200) {
                document.documentElement.innerHTML = "Removing the Subscription..."
                removeSubscription(this.responseText);
            }
            else if(this.readyState == 0){
                document.documentElement.innerHTML = "Initiating the Request..."
            }
            else if(this.readyState == 1){
                document.documentElement.innerHTML = "Establishing the Server..."
            }
            else if(this.readyState == 2){
                document.documentElement.innerHTML = "Request Recieved..."
            }
            else if(this.readyState == 3){
                document.documentElement.innerHTML = "Processing the Request..."
            }
            else{
                document.documentElement.innerHTML = "Error Finding the Page!"
            }
        };
    }

    let removeSubscription = (htmlContentStr)=>{
        let wrapper = document.createElement("DIV");
        wrapper.innerHTML = htmlContentStr;

        let paywalls = wrapper.querySelectorAll(".paywall");
        let subscriptions = wrapper.querySelectorAll(".subscription-benefits");

        paywalls.forEach((paywall) => {
            paywall.remove()
        })
        subscriptions.forEach((subscription) => {
            subscription.remove()
        })

        document.documentElement.innerHTML = "Removing the Ads..."
        removeAds(wrapper.innerHTML)
    }

    let removeAds = (htmlContentStr) => {
        let wrapper = document.createElement("DIV");
        wrapper.innerHTML = htmlContentStr;

        let adverts = wrapper.querySelectorAll(".advert");
        adverts.forEach((advert) => {
            advert.remove()
        })

        wrapper = addExtenCard(wrapper);

        putNewPage(wrapper)
    }

    let addExtenCard = (content)=>{
        let card = document.createElement("A");
        let desc = document.createElement("DIV");
        let author = document.createElement("DIV");
        let name = document.createElement("SPAN");

        card.classList.add("exten-card");
        desc.classList.add("exten-desc");
        author.classList.add("exten-auth");
        name.classList.add("exten-name");

        desc.innerHTML = window.location.href == "https://www.economist.com/" ? "Ads are Removed !!!" : "Page is Unlocked!!!";
        author.innerHTML = "By ";
        name.innerHTML = "vivek9patel";

        card.href = "https://www.linkedin.com/in/vivek9patel/";
        card.setAttribute("target", "_blank");

        author.appendChild(name);
        card.appendChild(desc);
        card.appendChild(author);

        content.appendChild(card);
        return content;
    }

    let putNewPage = (pageHtml) => document.documentElement.innerHTML = pageHtml.innerHTML;

    window.stop();
    loadCustomPage();
})();