// ==UserScript==
// @name DreamWidth - hide from latest
// @author Red2, based on script by Tenno Seremel, with permission
// @license CC BY-NC-SA
// @namespace red-2
// @match https://*.dreamwidth.org/*
// @version 0.1
// @grant       GM_setValue
// @grant       GM_getValue
// @run-at document-end
// @noframes
// ==/UserScript==
'use strict';

function find_parent_by_rule(element, parent_class_rule)
{
	let result = null;
	let x = element;

	while (x && !result && (x !== document)) {
		if (x.matches(parent_class_rule)) {
			result = x;
		}
		x = x.parentNode;
	}

	return result;
}

function hide_post(ev)
{
  ev.preventDefault();
  let item = find_parent_by_rule(ev.currentTarget, '.usercontent');
  if (item) {
          item.parentNode.removeChild(item);
	}
}

function get_user_name(entry)
{
	let username = '';

	let user_el = entry.querySelector('.author > .ljuser');
	if (user_el && user_el.hasAttribute('lj:user')) {
		username = user_el.getAttribute('lj:user');
	}

	return username;
}


function block_author(ev)
{

  ev.preventDefault();
  let aUserName = '';
  let item = find_parent_by_rule(ev.currentTarget, '.usercontent');
  if (item) {
 	  aUserName = get_user_name(item);
    item.innerHTML = "Blocked posts by " + aUserName;
    if (aUserName)  {
	    add_user_name(aUserName);
	    remove_user(aUserName);
    }
  }

}

function add_user_name(aName)
{
  if (aName && (hiddenArray.indexOf(aName) < 0)){
	  hiddenArray.push(aName);
    GM_setValue('hidden', hiddenArray.join(","));
	}
}

function remove_user(aName)
{
  let entries = document.querySelectorAll('.latest-entry');
  for(let entry of entries) {
    let myAuthor = get_user_name(entry);
    if (myAuthor && (myAuthor == aName)){
      entry.parentNode.removeChild(entry);
    }
  }
}


function add_button(container, text, handler)
{
	let list_item = document.createElement('div');
	list_item.setAttribute('class', 'link');

	let button = document.createElement('button');
	button.textContent = text;
	button.setAttribute('type', 'button');
	button.setAttribute('style', 'border:none;background:transparent;color:inherit;font:inherit;padding:0;cursor:pointer');
	button.addEventListener('click', handler, false);

	list_item.appendChild(button);
	container.appendChild(list_item);
}

let actions = document.querySelectorAll('.author');
let entries = document.querySelectorAll('.latest-entry');
let hiddenArray = GM_getValue('hidden', '').split(",");
for(let entry of entries) {
  let myAuthor = get_user_name(entry);
  if (myAuthor && (hiddenArray.indexOf(myAuthor) >= 0)){
    entry.parentNode.removeChild(entry);
  }
}
for (let action of actions) {
	add_button(action, 'Скрыть пост', hide_post);
	add_button(action, 'Заблокировать', block_author);
}