User:SD0001/deleted-metadata-link.js

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// Link to deletedrevisions API output for deleted pages
// And a link to snippet of deleted text for AFD/PROD/G13 deleted content
$.ready.then(function() {
	if (mw.config.get('wgArticleId') === 0 && !!$('.mw-warning-with-logexcerpt:has(".mw-logline-delete")').length) {

		var apiParams = {
	        action: 'query',
	        prop:'deletedrevisions',
	        titles: mw.config.get('wgPageName').replace(/_/g, ' '),
	        drvprop: 'user|timestamp|tags|size',
	        drvlimit: 'max',
	        formatversion: 2
	    };
	    var link = '/w/api.php?' + $.param(apiParams);
	
	    $('.mw-warning-with-logexcerpt:first').before(
	        $('<div>').addClass('deleted-metadata-link').append(
	            'See ',
	            $('<a>').attr('href', link).text('deleted revisions')
	         )
	    );
	    
	    mw.loader.using(['mediawiki.api', 'ext.gadget.morebits']).then(function() {
		    new mw.Api().get(apiParams).then(function(data) {
		    	var user = data.query.pages[0].deletedrevisions[0].user;	
		    	var ts = new Morebits.date(data.query.pages[0].deletedrevisions[0].timestamp);	
		    	$('.deleted-metadata-link').append(
		    		': last edited by ',
		    		$('<a>').attr('href', '/wiki/User:' + encodeURIComponent(user)).text(user),
		    		' at ' + ts.format('HH:mm, D MMMM YYYY') + ' (' + getTimeZoneString() + ')'
		    	);
		    	var $latestLogLine = $('.mw-logline-delete').first();
		    	if ($latestLogLine.length) {
		    		var $firstLinkInComment = $latestLogLine.find('.comment a').first();
	    			var date = parseLocalDate($latestLogLine.find('a').first().text());
	    			if (date.isValid()) {
	    				if ($firstLinkInComment.is('[href^="/wiki/Wikipedia:Articles_for_deletion"]')) {
			    			getRevidLinkFromDate('User:SDZeroBot/AfD grid', date).then(function(link) {
			    				$('.deleted-metadata-link').append(' <a href="' + link + '">Look up snippet in AfD grid</a>');
			    			});
			    		} else if ($firstLinkInComment.is('[href^="/wiki/Wikipedia:PROD"]')) {
			    			getRevidLinkFromDate('User:SDZeroBot/PROD grid', date).then(function(link) {
			    				$('.deleted-metadata-link').append(' <a href="' + link + '">Look up snippet in PROD grid</a>');
			    			});
			    		} else if ($firstLinkInComment.is('[href^="/wiki/Wikipedia:Criteria_for_speedy_deletion#G13"]') || 
			    			$firstLinkInComment.is('[href^="/wiki/Wikipedia:CSD#G13"]')) {
			    			getRevidLinkFromDate('User:SDZeroBot/G13 Watch', date, true).then(function(link) {
			    				$('.deleted-metadata-link').append(' <a href="' + link + '">Look up snippet in G13 Watch</a>');
			    			});
			    		}	
	    			}
		    	}
		    });
	    });
	}
});

function parseLocalDate(dateText) {
	var date = new Morebits.date(dateText + ' (UTC)');
	var userTimeZoneOffset = parseInt(mw.user.options.get('timecorrection').split('|')[1]);
	return date.subtract(userTimeZoneOffset, 'minutes');
}

function getTimeZoneString() {
	var timecorrection = -new Date().getTimezoneOffset();
	var negative = false;
	if (timecorrection < 0) {
		timecorrection = -timecorrection;
		negative = true;
	}
	return 'UTC' + (negative ? '–' : '+') + (timecorrection / 60);
}


function getRevidLinkFromDate(page, date, postLog) {
	return new mw.Api().get({
		titles: page,
		prop: 'revisions',
		rvstart: postLog ? date.add(1, 'day').toISOString() : date.toISOString(),
		rvlimit: 1,
		formatversion: 2
	}).then(function(data) {
		return data.query.pages[0].revisions[0].revid;
	}).then(function(revid) {
		return '/w/index.php?title=' + encodeURIComponent(page) + '&oldid=' + revid + 
			'#:~:text=' + encodeURIComponent(Morebits.pageNameNorm); // jump to text in Chrome
	});
}