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Reddit Secure Delete - Only Comments More Than 7 Days Old

Securely delete your reddit posts. Now with the ability to only securely delete comments more than 7 days old. Originally by https://greasyfork.org/en/users/5868-mrazavi

// ==UserScript==
// @name        Reddit Secure Delete - Only Comments More Than 7 Days Old 
// @namespace   Reddit
// @include     https://*.reddit.com/*
// @include     http://*.reddit.com/*
// @version     1.10
// @description Securely delete your reddit posts. Now with the ability to only securely delete comments more than 7 days old. Originally by https://greasyfork.org/en/users/5868-mrazavi
// ==/UserScript==

unsafeWindow.to_delete = [];
unsafeWindow.num_user_comments = 0;
unsafeWindow.deleted = 0;
unsafeWindow.span = '';
unsafeWindow.user = '';
unsafeWindow.days_to_go_back = 7;

unsafeWindow.delete_comment = function(thing_id, from_delete_all)
{
 try{
	var thing = document.querySelector("input[name='thing_id'][value='" + thing_id + "']");


	var status = thing.parentNode.querySelector("div.usertext-edit > div.bottom-area > div.usertext-buttons > span.status").innerHTML;

	var error = false;
	if ((status.indexOf("error") != -1) || (status.indexOf("submitting") != -1)){
		error = true;
	} else {
		var del_form = thing.parentNode.parentNode.querySelector("ul.buttons > li > form.del-button");
		unsafeWindow.toggle(del_form.querySelector("span.main > a"));
		del_form.querySelector("span.error > a.yes").click();
		unsafeWindow.deleted++;
	}

	if (from_delete_all){
		if (unsafeWindow.to_delete.length !== 0)
		{
			unsafeWindow.span.innerHTML = "TRYING TO DELETE COMMENT " + (unsafeWindow.deleted + 1) + " OF " + unsafeWindow.num_user_comments;
			var next_thing_id = unsafeWindow.to_delete.pop();
			unsafeWindow.setTimeout(unsafeWindow.overwrite_comment, 2000, next_thing_id, from_delete_all);
		}
		else
		{
			if (unsafeWindow.num_user_comments - unsafeWindow.deleted !== 0){
				unsafeWindow.num_user_comments = unsafeWindow.num_user_comments - unsafeWindow.deleted;
				UpdateDeleteAllSpan();
				unsafeWindow.span.innerHTML = "<span>Failed to delete " + unsafeWindow.num_user_comments + " comments</span><br>" + unsafeWindow.span.innerHTML;
			} else
				unsafeWindow.span.style.display = 'none';

		}
	} else {
		if (error)
			alert("Failed to overwrite your comment. Delete aborted.");
		else
			unsafeWindow.num_user_comments--;
		UpdateDeleteAllSpan();
	}
	return (error ? -1 : 0);
 }catch(er){
	alert(er);
	if (from_delete_all) unsafeWindow.location.reload();
	return -99;
 }
};

unsafeWindow.overwrite_comment = function(thing_id, from_delete_all)
{
 try{
	var edit_form = document.querySelector("input[name='thing_id'][value='" + thing_id + "']").parentNode;

	edit_form.querySelector("div.usertext-edit > div.bottom-area > div.usertext-buttons > button.cancel").click();


	var edit_btn = edit_form.parentNode.querySelector("ul > li > a.edit-usertext");
	if (edit_btn) edit_btn.click();
	var edit_textbox = edit_form.querySelector("div.usertext-edit > div > textarea");
	var repl_str = '';
	var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz><.-,+!@#$%^&*();:[]~";
	for(var x = 0; x < edit_textbox.value.length; x++){
		if (edit_textbox.value.substr(x,1) == '\n'){
			repl_str += '\n';
		}else{
			var rnum = Math.floor(Math.random() * chars.length);
			repl_str += chars.charAt(rnum, 1);
		}
	}
	edit_textbox.value = repl_str;
	edit_form.querySelector("div.usertext-edit > div.bottom-area > div.usertext-buttons > button.save").click();
	unsafeWindow.setTimeout(unsafeWindow.delete_comment, 2000, thing_id, from_delete_all);
	return 0;
 }catch(e){
	alert("Error interacting with overwrite form: " + e); 
	return -99;
 }
};


unsafeWindow.delete_all = function()
{
 try{
	unsafeWindow.num_user_comments = 0;
	unsafeWindow.deleted = 0;
	unsafeWindow.to_delete = [];
	var comments = document.querySelectorAll("a.author");
	for (var i = 0; i < comments.length; i++)
	{
		if (comments[i].innerHTML != unsafeWindow.user) continue;
        
        //If first word in there is "submitted" then this is a reddit submission/post, not a user comment
        var postMetaData = comments[i].parentNode.innerHTML.toLowerCase();
        var firstWord = postMetaData.substr(0, postMetaData.indexOf(" "));
        if (firstWord == "submitted") continue;
        
        //Check if it is more than X number of days ago before deleting it
        var main_parent = comments[i].parentNode.parentNode;
        var timestamp = main_parent.querySelector("time").innerHTML;
        if (timestamp.toLowerCase().indexOf("day") == -1) continue; 
        var number_of_days_ago = timestamp.substr(0, timestamp.indexOf(" "));
        if (number_of_days_ago <= unsafeWindow.days_to_go_back) continue;
        
		var thing_id = comments[i].parentNode.parentNode.querySelector("form.usertext > input[name='thing_id']").value;
		if (unsafeWindow.to_delete.indexOf(thing_id) == -1){
			unsafeWindow.to_delete.push(thing_id);
			unsafeWindow.num_user_comments++;
		}
	}
    if (unsafeWindow.num_user_comments > 0) 
    {
        unsafeWindow.span.innerHTML = "TRYING TO DELETE COMMENT 1 OF " + unsafeWindow.num_user_comments;
        var next_thing_id = unsafeWindow.to_delete.pop();
        unsafeWindow.overwrite_comment(next_thing_id, true);
    }
    else
    {
        alert("There were no comments older than " + unsafeWindow.days_to_go_back + " day(s) old.");
    }
 } catch(e){
	alert("Error trying to delete all your comments.\nError: " + e); 
	unsafeWindow.location.reload();
 }
};

function add_delete_links(ev)
{
	unsafeWindow.user = document.querySelector("span.user > a:not(.login-required)").innerHTML;
	if (!unsafeWindow.user){return;}
	var comments = document.querySelectorAll("a.author");
	unsafeWindow.num_user_comments = 0;
	for (var i = 0; i < comments.length; i++)
	{
		if (comments[i].innerHTML != unsafeWindow.user) continue;
	 try{
		var main_parent = comments[i].parentNode.parentNode;
		var thing_id = main_parent.querySelector("form > input[name='thing_id']").value;
		var list = main_parent.querySelector("ul.flat-list");
		if (list.querySelector("li.secure_delete")) continue;
		unsafeWindow.num_user_comments++;

		var addedlink = document.createElement("li");
		addedlink.setAttribute('class', 'secure_delete');
		var dlink = document.createElement("a");
		dlink.setAttribute('class','bylink secure_delete');
		dlink.setAttribute('onClick','javascript:var ret = overwrite_comment("' + thing_id + '", false);');
		dlink.setAttribute('href', 'javascript:void(0)');
		dlink.appendChild(document.createTextNode('SECURE DELETE'));
		addedlink.appendChild(dlink);
		main_parent.querySelector("ul.flat-list").appendChild(addedlink);
	 }catch(e){}
	}

	unsafeWindow.span = document.createElement("span");
	unsafeWindow.span.setAttribute('class', 'nextprev secure_delete_all');
	UpdateDeleteAllSpan();
	
}

function UpdateDeleteAllSpan()
{
	if (unsafeWindow.num_user_comments){
		unsafeWindow.span.innerHTML = "";
		var dlink = document.createElement("a");
		dlink.setAttribute('class','bylink');
		dlink.setAttribute('onClick','javascript:return delete_all()');
		dlink.setAttribute('href', 'javascript:void(0)');
		dlink.appendChild(document.createTextNode('SECURE DELETE visible comment(s) on this page that are over ' + unsafeWindow.days_to_go_back + ' day(s) old.'));
		unsafeWindow.span.appendChild(dlink);
		document.querySelector("div.content").insertBefore(unsafeWindow.span,document.querySelector("div.content").firstChild);
	} else if (unsafeWindow.span !== null) {
		unsafeWindow.span.style.display = 'none';
	}
}

unsafeWindow.addEventListener("DOMContentLoaded",add_delete_links, false);