/*

You can import this gadget to other wikis by using mw.loader.load and specifying the local alias for Special:Contributions. For example:

var markblocked_contributions = 'Special:Contributions';

mw.loader.load('//en.wikipedia.org/?title=MediaWiki:Gadget-markblocked.js&bcache=1&maxage=259200&action=raw&ctype=text/javascript');



This gadget will pull the user accounts and IPs from the history page and will strike out the users that are currently blocked.

*/

function markBlocked( container ) {

	var ipv6Regex = /^((?=.*::)(?!.*::.+::)(::)?([\dA-F]{1,4}:(:|\b)|){5}|([\dA-F]{1,4}:){6})((([\dA-F]{1,4}((?!\3)::|:\b|$))|(?!\2\3)){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})$/i;



	// Collect all the links in the page's content

	var contentLinks = $( container ).find( 'a' );



	var mbTooltip =  window.mbTooltip || '; blocked ($1) by $2: $3 ($4 ago)';



	// Get all aliases for user: & user_talk:

	var userNS = [];

	for ( var ns in mw.config.get( 'wgNamespaceIds' ) ) {

		if ( mw.config.get( 'wgNamespaceIds' )[ns == 2 || mw.config.get( 'wgNamespaceIds' )[ns == 3 ) {

			userNS.push( mw.util.escapeRegExp(ns.replace( /_/g, ' ' )) + ':' );

		}

	}



	// Let wikis that are importing this gadget specify the local alias of Special:Contributions

	if ( window.markblocked_contributions === undefined ) {

		window.markblocked_contributions = 'Special:Contributions';

	}

	// RegExp for all titles that are  User:| User_talk: | Special:Contributions/ (for userscripts)

	var userTitleRX = new RegExp( '^(' + userNS.join( '|' ) + '|' + window.markblocked_contributions + '\\/)+([^\\/#]+)$', 'i' );



	// RegExp for links

	// articleRX also matches external links in order to support the noping template

	var articleRX = new RegExp( mw.config.get( 'wgArticlePath' ).replace('$1', '') + '([^#]+)' );

	var scriptRX =  new RegExp( '^' + mw.config.get( 'wgScript' ) + '\\?title=([^#&]+)' );



	var userLinks = {};

	var user, url, ma, pgTitle;





	// Find all "user" links and save them in userLinks : { 'users': [<link1>, <link2>, ...], 'user2': [<link3>, <link3>, ...], ... }

	contentLinks.each( function( i, lnk ) {

		if( $( lnk ).hasClass("mw-changeslist-date") || $( lnk ).parent("span").hasClass("mw-history-undo") || $(lnk).parent("span").hasClass("mw-rollback-link") )

		{

			return;

		}

		url = $( lnk ).attr( 'href' );

		if ( !url ) {

			return;

		}

		if ( ma = articleRX.exec( url ) ) {

			pgTitle = ma1];

		} else if ( ma = scriptRX.exec( url ) ) {

			pgTitle = ma1];

		} else {

			return;

		}

		pgTitle = decodeURIComponent( pgTitle ).replace( /_/g, ' ' );

		user = userTitleRX.exec( pgTitle );

		if ( !user ) {

			return;

		}

		var userTitle = mw.Title.newFromText( user2 );

		if (!userTitle) {

			return;

		}

		user = userTitle.getMainText();

		if( ipv6Regex.test(user) ) user = user.toUpperCase();

		$( lnk ).addClass( 'userlink' );

		if ( !userLinksuser ) {

			userLinksuser = [];

		}

		userLinksuser].push (lnk );

	} );





	// Convert users into array

	var users = [];

	for ( var u in userLinks ) {

		users.push( u );

	}

	if ( users.length === 0 ) {

		return;

	}



	// API request

	var serverTime, apiRequests = 0;

	container.addClass( 'markblocked-loading' );

	while ( users.length > 0 ) {

		apiRequests++;

		$.post( 

			mw.util.wikiScript( 'api' ) + '?format=json&action=query',

			{

				list: 'blocks',

				bklimit: 100,

				bkusers: users.splice( 0, 50 ).join( '|' ),

				bkprop: 'user|by|timestamp|expiry|reason|restrictions'

				// no need for 'id|flags'

			},

			markLinks

		);

	}



	return; // the end





	// Callback: receive data and mark links

	function markLinks( resp, status, xhr ) {



		serverTime = new Date( xhr.getResponseHeader('Date') );

		var list, blk, tip, links, lnk;

		if ( !resp || !( list = resp.query ) || !( list = list.blocks ) ) {

			return;

		}



		for ( var i = 0; i < list.length; i++ ) {

			blk = listi];

			var partial = blk.restrictions && !Array.isArray(blk.restrictions); //Partial block

			if ( /^in/.test( blk.expiry ) ) {

				clss = partial ? 'user-blocked-partial' : 'user-blocked-indef';

				blTime = blk.expiry;

			} else {

				clss = partial ? 'user-blocked-partial' : 'user-blocked-temp';

				blTime = inHours ( parseTS( blk.expiry ) - parseTS( blk.timestamp ) );

			}

			tip = mbTooltip;

			if (partial) {

				tip = tip.replace( 'blocked', 'partially blocked' );

			}

			tip = tip.replace( '$1', blTime )

				.replace( '$2', blk.by )

				.replace( '$3', blk.reason )

				.replace( '$4', inHours ( serverTime - parseTS( blk.timestamp ) ) );

			links = userLinksblk.user];

			for ( var k = 0; links && k < links.length; k++ ) {

				lnk = $( linksk );

				lnk = lnk.addClass( clss );

				if ( window.mbTipBox ) {

					$( '<span class=user-blocked-tipbox>#</span>' ).attr( 'title', tip ).insertBefore( lnk );

				} else {

					lnk.attr( 'title', lnk.attr( 'title' ) + tip );

				}

			}

		}



		if ( --apiRequests === 0 ) { // last response

			container.removeClass( 'markblocked-loading' );

			$( '#ca-showblocks' ).parent().remove(); // remove added portlet link

		}



	}





	// --------AUX functions



	// 20081226220605  or  2008-01-26T06:34:19Z   -> date

	function parseTS( ts ) {

		var m = ts.replace( /\D/g, '' ).match( /(\d\d\d\d)(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)/ );

		return new Date ( Date.UTC( m1], m2-1, m3], m4], m5], m6 ) );

	}



	function inHours( ms ) { // milliseconds -> "2:30" or 5,06d or 21d

		var mm = Math.floor( ms / 60000 );

		if ( !mm ) {

			return Math.floor( ms / 1000 ) + 's';

		}

		var hh = Math.floor( mm / 60 );

		mm = mm % 60;

		var dd = Math.floor( hh / 24 );

		hh = hh % 24;

		if ( dd ) {

			return dd + ( dd < 10 ? '.' + zz( hh ) : '' ) + 'd';

		}

		return hh + ':' + zz( mm );

	}



	function zz( v ) { // 6 -> '06'

		if ( v <= 9 ) {

			v = '0' + v;

		}

		return v;

	}

}// -- end of main function



// Start on some pages

switch ( mw.config.get( 'wgAction' ) ) {

	case 'edit':

	case 'submit':

		break;

	default: // 'view', 'history', 'purge', ...

		var maybeAutostart = $.Deferred();

		if ( window.mbNoAutoStart ) {

			var portletLink = mw.util.addPortletLink( 'p-cactions', '', 'XX', 'ca-showblocks' );

			$( portletLink ).click( function ( e ) {

				e.preventDefault();

				maybeAutostart.resolve();

			} );

		} else {

			maybeAutostart.resolve();

		}



		$.when( $.ready, mw.loader.using( 'mediawiki.util' ), maybeAutostart ).then( function() {

			var firstTime = true;



			mw.hook( 'wikipage.content' ).add( function ( container ) {

				// On the first call after initial page load, container is mw.util.$content



				// Used to limit mainspace activity to just the diff definitions

				if ( mw.config.get( 'wgAction' ) === 'view' && mw.config.get( 'wgNamespaceNumber' ) === 0 ) {

					container = container.find( '.diff-title' );

				}



				if ( firstTime ) {

					firstTime = false;



					// On page load, also update the namespace tab

					container = container.add( '#ca-nstab-user' );



					mw.util.addCSS('\

						.markblocked-loading a.userlink {opacity:' + ( window.mbLoadingOpacity || 0.85 ) + '}\

						a.user-blocked-temp {'   + ( window.mbTempStyle || 'opacity: 0.7; text-decoration: line-through' ) + '}\

						a.user-blocked-indef {'  + ( window.mbIndefStyle || 'opacity: 0.4; font-style: italic; text-decoration: line-through' ) + '}\

						a.user-blocked-partial {'  + ( window.mbPartialStyle || 'text-decoration: underline; text-decoration-style: dotted' ) + '}\

						.user-blocked-tipbox {' + ( window.mbTipBoxStyle || 'font-size:smaller; background:#FFFFF0; border:1px solid #FEA; padding:0 0.3em; color:#AAA' ) + '}\

					');

				}



				markBlocked( container );

			} );

		} );

}