User:SD0001/hide-reverted-edits.js

/**
 * Script to provide a button on page histories
 * which when clicked shows a sanitized version of the history
 * with reverted edits (and their reversions) removed
 *
 */

$.ready.then(function() {

	if (mw.config.get('wgAction') !== 'history') return;

	// bool: are the reverts currently hidden or not?
	var hidingReverts;

	if (/&hidereverted=y/.test(window.___location.href)) {
		hideRevertedEdits();
		fixLinks(true);
		hidingReverts = true;
	} else {
		hidingReverts = false;
	}

	$('<button>')
		.addClass('reverted-edits-showhide')
		.text(hidingReverts ? 'Show reverted edits' : 'Hide reverted edits')
		.on('click', function(e) {
			e.preventDefault();

			if (!hidingReverts) {
				hideRevertedEdits();
				$('.reverted-edits-showhide').text('Show reverted edits');
			} else {
				$('#pagehistory li').show();
				$('.reverted-edits-showhide').text('Hide reverted edits');
			}
			hidingReverts = !hidingReverts;
			fixLinks(hidingReverts);

		}).insertAfter('.mw-history-compareselectedversions');
	$('.mw-history-compareselectedversions').css('display', 'inline');

});

function hideRevertedEdits() {

	$('#pagehistory li').each(function(idx) {

		if (this.style.display === 'none') {
			return true; // continue if already hidden. This handles reverts of reverts.
		}

		var editcomment = $(this).find('.comment').text();
		var rgx;

		// Plain mediawiki undo with untampered edit summary
		if (rgx = /^Undid revision (\d+) by/.exec(editcomment)) {
			var reverted_rev_id = rgx[1];
			var $reverted_rev = $('[data-mw-revid=' + reverted_rev_id +']');

			// just to confirm that the edit is a revert, find the byte count changes for the
			// two edits: if they add up to 0, then this is a revert (in all likelihood)
			var diffbytes1 = parseInt($(this).find('[class^=mw-plusminus]').text());
			var diffbytes2 = parseInt($reverted_rev.find('[class^=mw-plusminus]').text());

			if (diffbytes1 + diffbytes2 === 0) {
				$(this).hide();
				$reverted_rev.hide();
				if (window.hre_debug) console.log(idx, $(this).find('.mw-changeslist-date').text(), 'undo');
			}

		// 'Restore this version' reverts using Twinkle or popups or the pending changes tool
		// TW: 		Reverted to revision 3234343 by ...
		// popups: 	Revert to revision 34234234 by ...
		// PC tool: Revereted 3 pending edits by Foo and Bar to revision 3243432 by ...
		} else if (rgx = /^Revert(?:ed)? (?:\d+ pending edits? by .*?)?to revision (\d+)/.exec(editcomment)) {
			var last_good_revision = rgx[1];
			$(this).hide();
			var rev = $(this).next();
			if (parseInt(last_good_revision) > parseInt(rev.attr('data-mw-revid')) ||
				parseInt(last_good_revision) < 100) { // sanity checks
				return true; // revision id given has to be wrong
			}
			while ( rev.attr('data-mw-revid') !== last_good_revision ) {
				rev.hide();
				rev = rev.next();
				if (rev.length === 0) break; // end of page history in current view
			}
			if (window.hre_debug) console.log(idx, $(this).find('.mw-changeslist-date').text(), 'TW restore');

		} else {

			var reverted_user;

			// Twinkle rollbacks
			if (rgx = /^Reverted (?:good faith|\d+) edits? by (.*?) \(talk\)/.exec(editcomment)) {
				reverted_user = rgx[1];
				if (window.hre_debug) console.log(idx, $(this).find('.mw-changeslist-date').text(), 'Twinkle rollback');

			// Old Twinke vandalism rollback
			} else if (rgx = /^Reverted \d+ edits? by (.*?) identified as vandalism/.exec(editcomment)) {
				reverted_user = rgx[1];
				if (window.hre_debug) console.log(idx, $(this).find('.mw-changeslist-date').text(), 'Twinkle (old) rollback');

			// STiki AGF/normal/vandalism revert
			} else if (rgx = /^Reverted \d+ (?:good faith )?edits? by (.*?) (?:identified as test\/vandalism )?using STiki/.exec(editcomment)) {
				reverted_user = rgx[1];
				if (window.hre_debug) console.log(idx, $(this).find('.mw-changeslist-date').text(), 'STiki rollback');

			// normal mediawiki rollback and Huggle rollback
			} else if (rgx = /^Reverted edits by (.*?) \(talk\)/.exec(editcomment)) {
				reverted_user = rgx[1];
				if (window.hre_debug) console.log(idx, $(this).find('.mw-changeslist-date').text(), 'mw/huggle rollback');

			// ClueBot
			} else if ( ['ClueBot NG', 'ClueBot'].includes($(this).find('.mw-userlink bdi').text()) ) {
				reverted_user = /^Reverting possible vandalism by (.*?) to version by/.exec(editcomment)[1];
				if (window.hre_debug) console.log(idx, $(this).find('.mw-changeslist-date').text(), 'cluebot rollback');

			// XLinkBot
			} else if ( $(this).find('.mw-userlink bdi').text() === 'XLinkBot' ) {
				reverted_user = /^BOT--Reverting link addition\(s\) by (.*?) to/.exec(editcomment)[1];
				if (window.hre_debug) console.log(idx, $(this).find('.mw-changeslist-date').text(), 'xlinkbot rollback');
			}

			if (reverted_user) {

				// page history shows compressed IPv6 address (with multiple 0's replaced by ::)
				// though rollback edit summaries use the uncompressed form (though with leading 0's removed)
				if (mw.util.isIPv6Address(reverted_user)) {
					reverted_user = reverted_user.replace(/\b(?:0+:){2,}/, ':').toLowerCase();
				}
				$(this).hide();
				var rev = $(this).next();
				while ( rev.find('.mw-userlink bdi').text() === reverted_user ) {
					rev.hide();
					rev = rev.next();
					if (rev.length === 0) break; // end of page history (in current view)
				}
			}

		}

	});

}

function fixLinks(hidingReverts) {
	if (hidingReverts) {
		if (!/&hidereverted=y/.test($('.mw-firstlink').attr('href'))) {
			$('.mw-firstlink, .mw-lastlink, .mw-prevlink, .mw-nextlink, .mw-numlink').each(function() {
				this.href += '&hidereverted=y';
			});
		}
	} else {
		$('.mw-firstlink, .mw-lastlink, .mw-prevlink, .mw-nextlink, .mw-numlink').each(function() {
			this.href = this.href.replace(/&hidereverted=y/, '');
		});
	}
}