Userscripts.org

// Copyright 2007 Istvan Karaszi <iwiw@spam.raszi.hu>.
// All rights Reserved.

// ==UserScript==
// @name          iWiW messageboard userblock
// @namespace     http://persistent.info/greasemonkey
// @description	  Do you have a too talkative friend? You can block his/her messages from message board.
// @include       http://*wiw.hu/*
// @include       https://*wiw.hu/*
// ==/UserScript==

const COOKIENAME = "iwiw-blocked-users";
const SPLITCHAR = ":";
const CSSRULES = [
	"div.blocked { min-height: 0 !important; } ",
	"div.blocked p { display: none; } ",
	"div.blocked a.user_image { display: none; } ",
	"div.blocked a { color: #a8b8de !important; }"
];

var users = _getBlockedUsers();
_appendCSSRules();
_addBlockButtons();
_formatMessageBoard();

function _appendCSSRules() {
	for (var i = 0; i < CSSRULES.length; i++) {
		GM_addStyle(CSSRULES[i])
	}
}

function _getItems() {
	var items = _XPath("//xhtml:div[contains(@class, 'messageboard')]//xhtml:div[contains(@class, 'item')]");
	return items;
}
function _addBlockButtons() {
	var items = _getItems();
	for(var i = 0; i < items.snapshotLength; i++) {
		var item = items.snapshotItem(i);

		var uid = _getUserID(item);
		if (!uid) continue;

		_addBlockButton(uid, item);
	}
}

function _formatMessageBoard() {
	var items = _getItems();
	for(var i = 0; i < items.snapshotLength; i++) {
		var item = items.snapshotItem(i);

		var uid = _getUserID(item);
		if (!uid) continue;

		_formatItem(uid, item);
	}
}

function _isUserBlocked( uid ) {
	for(var i = 0; i < users.length; i++) {
		if (users[i] == uid) return i;
	}

	return null;
}

function _getBlockedUsers() {
	var users = new String(GM_getValue(COOKIENAME, ""));
	return users.split(SPLITCHAR);
}

function _setBlockedUsers() {
	GM_setValue(COOKIENAME, users.join(SPLITCHAR));
}

function _addBlockedUser( uid ) {
	if (_isUserBlocked(uid) == null) {
		users.push(uid);
		_setBlockedUsers(users);
	}
}

function _removeBlockedUser( uid ) {
	var pos = _isUserBlocked(uid);
	if (pos != null) {
		users.splice(pos, 1);
		_setBlockedUsers(users);
	}
}

function _formatItem( uid, item ) {
	if (_isUserBlocked(uid) != null) {
		// user is blocked
		_addClass(item, "blocked");
	} else {
		_removeClass(item, "blocked");
	}
}

function _addBlockButton( uid, item ) {
	var h5s = _XPath(".//xhtml:h5[1]", item);
	if (h5s.snapshotLength == 0) return;

	var h5 = h5s.snapshotItem(0);
	h5.appendChild(unsafeWindow.document.createTextNode(" "));

	var blockButton = unsafeWindow.document.createElement("a");
	blockButton.href = "#";
	blockButton.className = "block";
	blockButton.appendChild(unsafeWindow.document.createTextNode("[block/unblock]"));
	blockButton.onclick = function() {
		return _handleClick(uid, item);
	}

	h5.appendChild(blockButton);
}

function _handleClick( uid, item ) {
	if (_isUserBlocked(uid) == null) {
		_addBlockedUser(uid);
	} else {
		_removeBlockedUser(uid);
	}

	_formatMessageBoard();
	return false;
}

function _addClass( item, newclass ) {
	var currentClass = new String(item.className);
	item.className = currentClass.concat(" blocked");
}

function _removeClass( item, oldclass ) {
	var currentClass = new String(item.className);
	var classes = currentClass.split(" ");
	
	var newclasses = new Array();
	for(var i = 0; i < classes.length; i++) {
		if (classes[i] == oldclass) continue;
		newclasses.push(classes[i]);
	}

	item.className = newclasses.join(" ");
}

function _getUserID( item ) {
	var results = _XPath(".//xhtml:h5/xhtml:a[contains(@href, 'userID')]", item);
	if (!results.snapshotLength) return null;

	var anchor = results.snapshotItem(0);

	var url = new String(anchor.href);
	var regex = /userID=(\d+)/;
	var matches = url.match(regex);

	if (!matches) return null;
	if (matches.length == 0) return null;

	return matches[1];
}

function _XPath( query, context ) {
	if (!context) context = document;
	return document.evaluate(query, context, nsResolver, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
}

function nsResolver( prefix ) {
	var ns = {
		'xhtml' : 'http://www.w3.org/1999/xhtml'
	};

	return ns[prefix] || null;
}