User:Evad37/Watchlist-openUnread.js

$(document).ready( function () {
	if( mw.config.get('wgCanonicalSpecialPageName') != 'Watchlist' ) {
	// only operate in Special: namespace, on Special:Watchlist
	return;
	}


	// Set default options 
	var openUnread_maxnum = "10"; 
	var openUnread_oldest = true; 
	var openUnread_diff = true; 

	//Add a form to open multiple unread pages
	var openUnread_form = '<div id="openUnread-input" style="margin:5px 0;">'+
		'<button id="openUnread-go">Open unread pages</button> '+
		'(Options: <input type="text" name="openUnread-number" id="openUnread-number" style="width:2em;" value=' + openUnread_maxnum + ' /> pages max / '+
		'<span class="mw-input-with-label"><input name="openUnread-order" id="openUnread-order" type="checkbox">&nbsp;<label for="openUnread-order">oldest first</label></span> / '+
		'<span class="mw-input-with-label"><input name="openUnread-diff" id="openUnread-diff" type="checkbox">&nbsp;<label for="openUnread-diff">show diffs</label></span>)'+
		'</div><hr>';
	$("form#mw-watchlist-form").after(openUnread_form);
	$("fieldset#mw-watchlist-options").css("margin-bottom", "0");

	if (openUnread_oldest) {
		$("#openUnread-order").prop( "checked", "true" );
	}
	if (openUnread_diff) {
		$("#openUnread-diff").prop( "checked", "true" );
	}
	
	// Button clicked
	$("#openUnread-go").click(function() {
		// get form options
		var maxnum = parseInt( $('#openUnread-number').val() );
		if (isNaN(maxnum) || maxnum < 1) {
			return;		// error - zero, negative, or not a number
		}
		
		// get unread title links as array
		var unread = $("li.mw-changeslist-line-watched, table.mw-changeslist-line-watched").find("a.mw-changeslist-title").map(function() {
			var diffquery;
			if ( $('#openUnread-diff').prop('checked') ) {
				$sincelastvisit = $(this).parent().parent().find("a:contains('since last visit')");
				$changes = $(this).parent().parent().find("a:contains('changes')");
				if ($sincelastvisit.length === 1) {
					diffquery="?" + $sincelastvisit.attr("href").match(/diff=.*&oldid=.*/g);
				} else if ($changes.length === 1) {
					diffquery="?" + $changes.attr("href").match(/diff=.*&oldid=.*/g);
				} else {
					diffquery = "?diff=cur&oldif=prev";
				}
			} else {
				diffquery = "";
			}
			return $( this ).attr("href") + diffquery;
		}).get();

		// reverse if order is oldest first
		if ( $('#openUnread-order').prop('checked') ) {
			unread.reverse();
		}


		//remove duplicates
		var seen = {};
		var unique_unread = [];
		var len = unread.length;
		var j = 0;
		for (var i = 0; i < len; i++) {
			var item = unread[i];
			if(seen[item] !== 1) {
				seen[item] = 1;
				unique_unread[j++] = item;
			}
		}

		// number of links to open
		if (unique_unread.length < maxnum) {
			maxnum = unique_unread.length;
		}

		// open links in new tabs/windows
		for (var ii=0; ii < maxnum; ii++) {
			window.open(unique_unread[ii], "_blank");
		}
	});
});