User:RyanB88/twinklediff.js

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Documentation for this user script can be added at User:RyanB88/twinklediff.

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//Status.debugLevel = 1;

/**
* Last diff tab, show difference between last revision and the one before
*/
function lastdiff() 
{
	if( wgNamespaceNumber >= 0 ) {
		var query = {
			'title': wgPageName,
			'diff': 'cur',
			'oldid': 'prev'
		};
		var l = mw.util.addPortletLink('p-cactions', mw.config.get('wgServer') + mw.config.get('wgScriptPath') + '/index.php?' + QueryString.create( query ), 'last', '' );
		l.lastChild.title="Show most recent diff";
	}
}
$(lastdiff);

var dataXML;
var ntitle;
var me;

function diffSincePrevUserButton() { 
	if( wgNamespaceNumber < 0 ) {
		return;
	}

	if( !QueryString.exists( 'diff' ) ) {
		// Not diff page
		return;
	} 

	ntitle = getElementsByClassName( document.getElementById('bodyContent'), 'td' , 'diff-ntitle' )[0];

	if( !ntitle ) {
		// Nothing to see here, move along...
		return;
	}

	var l = mw.util.addPortletLink('p-cactions', "javascript:diffSincePrevUserInit(false);", 'since', '' );
	l.lastChild.title="Show difference between last diff and the revision made by previous user";

	var l = mw.util.addPortletLink('p-cactions', "javascript:diffSincePrevUserInit(true);", 'since mine', '' );
	l.lastChild.title="Show difference between last diff and my last revision";
}
$(diffSincePrevUserButton);

function diffSincePrevUserInit(me) {
	try {
		Status.init( document.getElementById('bodyContent') );
		var rev = wgCurRevisionId;
		var user;
		if( me ) {
			Status.debug( '"me" is choosen' );
			user = wgUserName;
		} else if( vandal ) { 
			Status.debug( 'vandal ' + vandal + ' already defined' );
			// twinklefluff or simlar have already parsed this thingi
			user = vandal;
		} else {
			Status.debug( 'testing 3:rd element' );
			user = ntitle.getElementsByTagName('a')[3].firstChild.nodeValue;
			Status.debug( '3:rd element: ' + user );
			if( user == 'Current revision' ) {
				Status.debug( 'testing 6:th element' );
				user = ntitle.getElementsByTagName('a')[6].firstChild.nodeValue;
				Status.debug( '6:th element: ' + user );
			}
		}

		diffSincePrevUser( user, rev, me );
	} catch(e) {
		if(e.what){
			alert(e.what())
		} else {
			alert(e);
		}
	}
}

function diffSincePrevUser( user, rev, pMe ) {

	me = pMe;
	dataXML = sajax_init_object();

	dataXML.overrideMimeType('text/xml');

	var query = {
		'prop': 'revisions',
		'format': 'xml',
		'action': 'query',
		'titles': wgPageName,
		'rvlimit': 50,
		'rvprop': 'user',
		'rvendid': wgCurRevisionId
	};

	Status.debug( "Query string:" + QueryString.create( query ), 1 );
	Status.status( 'Querying revisions' );

	dataXML.open( 'GET', mw.config.get('wgServer') + mw.config.get('wgScriptPath') + "/api.php?" + QueryString.create( query ) , true );

	dataXML.onreadystatechange = function() {
		if ( dataXML.readyState != 4 ){
			Status.progress('.');		
			return;
		} 

		if( dataXML.status != 200 ){
			Status.error('Bad status , bailing out');		
			return;
		}
		Status.progress(' Done.');		

		var doc = dataXML.responseXML.documentElement;
		var revisions = doc.getElementsByTagName('rev');
		Status.debug( 'length: ' + revisions.length, 1 );

		var curNode = revisions[0];

		Status.debug( 'curNode: ' + curNode, 1 );
		Status.debug( 'user: ' + user, 1 );
		Status.debug( "rev: " + rev, 1 );

		var last = null;

		Status.status( 'Finding last revision made by user...' );

		while( curNode != null ) {
			Status.debug( 'curNode: ' + curNode.getAttribute( 'revid' ), 1 );


			if( me ) {
				if( curNode.getAttribute( 'revid' ) < rev && curNode.getAttribute( 'user' ) == user ) {
					Status.debug( "found rev and user", 1 );
					last = curNode.getAttribute( 'revid' );
					break;
				} 
			} else {
				if( curNode.getAttribute( 'revid' ) < rev && curNode.getAttribute( 'user' ) != user ) {
					Status.debug( "found rev and user", 1 );
					last = curNode.getAttribute( 'revid' );
					break;
				} 
			}
			curNode = curNode.nextSibling;
		}

		if( last == null ) {
			Status.error( [ 'No previos revision found, or ', user , ' is only contributor ' ] );
			return;
		}

		var query = {
			'title': wgPageName,
			'oldid': last,
			'diff': rev
		};

		window.location = mw.config.get('wgServer') + mw.config.get('wgScriptPath') + '/index.php?' + QueryString.create( query );

	};
	dataXML.send( null );

}