User:SD0001/hide-reverted-edits.js

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/**
 * 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 = rgx[1];
				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 = rgx[1];
				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 = rgx[1];
				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 = 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 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 = rgx[1];
				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 = rgx[1];
				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);