/**

 * 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

 *

 */

 

 var hre = {

 	init: 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)) {

			hre.hideRevertedEdits();

			hre.fixLinks(true);

			hidingReverts = true;

		} else {

			hidingReverts = false;

		}

		

		$('<button>')

			.addClass('reverted-edits-showhide')

			.addClass('mw-ui-button')

			.text(hidingReverts ? 'Show reverted edits' : 'Hide reverted edits')

			.css('margin-left', '3px')

			.on('click', function(e) {

				e.preventDefault();

	

				if (!hidingReverts) {

					hre.hideRevertedEdits();

					$('.reverted-edits-showhide').text('Show reverted edits');

				} else {

					$('#pagehistory li').show();

					$('.reverted-edits-showhide').text('Hide reverted edits');

				}

				hidingReverts = !hidingReverts;

				hre.fixLinks(hidingReverts);

	

			}).insertAfter('.mw-history-compareselectedversions input');

	},

	

	hideRevertedEdits: function() {



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

	

			if (this.style.display === 'none') {

				return true; // continue if already hidden. This handles reverts of reverts.

			}

	

			var $this = $(this);

	

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

			var rgx, reverted_user, last_good_revision;

	

			// Plain MediaWiki undo with untampered edit summary

			if (rgx = /^Undid revision (\d+) by/.exec(editcomment)) {

				var reverted_rev_id = rgx1];

				var $reverted_rev = $('[data-mw-revid=' + reverted_rev_id +']');

	

				// just to confirm that the edit isn't a partial revert, find the byte count changes for the

				// two edits: if they add up to 0, then this is a full revert (in all likelihood)

				var diffbytes1 = parseInt($this.find('[class^=mw-plusminus]').text().replace(/−/, '-'));

				var diffbytes2 = parseInt($reverted_rev.find('[class^=mw-plusminus]').text().replace(/−/, '-'));

	

				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 (old) or popups or pending changes reverts

			// TW(old): 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)) {

				last_good_revision = rgx1];

				if (window.hre_debug) console.log(idx, $this.find('.mw-changeslist-date').text(), 'restore');

	

			// 'Restore this version' reverts using Twinkle (new)

			} else if (rgx = /^Restored revision (\d+) by/.exec(editcomment)) {

				last_good_revision = rgx1];

				if (window.hre_debug) console.log(idx, $this.find('.mw-changeslist-date').text(), 'tw(new) restore');

	

			// Reverts tagged as "Rollback"

			} else if ($this.find('.mw-tag-marker-mw-rollback').length) {

				reverted_user = $this.next().find('.mw-userlink bdi').text();

			}

	

			// Twinkle rollbacks

			else if (rgx = /^Reverted (?:good faith|\d+) edits? by (.*?) \(talk\)/.exec(editcomment)) {

				reverted_user = rgx1];

				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 = rgx1];

				if (window.hre_debug) console.log(idx, $this.find('.mw-changeslist-date').text(), 'Twinkle (old) rollback');

	

			// STiki vandalism rollbacks, and all reverts using MediaWiki rollback, Huggle, Cluebot have the "Rollback" tag added

			// and hence would have been handled above. The regex checks here are to account for old reverts done before the

			// "Rollback" tag was introduced

	

			// STiki AGF/normal/vandalism revert

			} else if (rgx = /^Reverted \d+ (?:good faith )?edits? by (.*?) (?:identified as test\/vandalism )?using STiki/.exec(editcomment)) {

				reverted_user = rgx1];

				if (window.hre_debug) console.log(idx, $this.find('.mw-changeslist-date').text(), 'STiki rollback');

	

			// normal MediaWiki rollback and Huggle rollback, and redwarn rollback

			// MW/Huggle: Reverted edits by User (talk)

			// RedWarn:   Reverting edit(s) by User (talk)

			} else if (rgx = /^Revert(?:ed|ing) edit\(?s\)? by (.*?) \(talk\)/.exec(editcomment)) {

				reverted_user = rgx1];

				if (window.hre_debug) console.log(idx, $this.find('.mw-changeslist-date').text(), 'mw/huggle/redwarn 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)

				}

			}

			

			if (last_good_revision) {

				

				$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

				}

	

			}

	

		});

	

	},

	

	/**

	 * Add or remove "&hidereverted=y" from the targets of links:

	 * (newest | oldest) (newer n | older n) (20 | 50 | 100 | 250 | 500)

	 */

	fixLinks: function(hidingReverts) {

		if (hidingReverts) {

			if (!/&hidereverted=y/.test($('.mw-numlink').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/, '');

			});

		}

	}

}

 

$(hre.init);