User:enterprisey Offset-history-link.js

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This user script seems to have a documentation page at User:Enterprisey/offset-history-link.

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( function () {

    var diffCell = document.querySelector( "td.diff-ntitle" );

    if( diffCell ) {

        mw.loader.using(  "mediawiki.api" ], function () {

            new mw.Api().get( {

                action: "query",

                prop: "revisions",

                revids: mw.config.get( "wgDiffNewId" ),

                rvprop: "timestamp"

            } ).then( function ( data ) {

                var timestamp = data.query.pages mw.config.get( "wgArticleId" ) ].revisions0].timestamp;

                var TIMESTAMP_RGX = /(\d{4})-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)/;

                var timestampMatch = TIMESTAMP_RGX.exec( timestamp );

                var year = parseInt( timestampMatch1 ),

                    month = parseInt( timestampMatch2 ),

                    day = parseInt( timestampMatch3 ),

                    hour = parseInt( timestampMatch4 ),

                    minute = parseInt( timestampMatch5 ),

                    second = parseInt( timestampMatch6 );

                var newTimestamp;

                var paddedMonth = month < 10 ? '0' + month : '' + month;

                function pad( x ) { return ( x < 10 ) ? '0' + x : '' + x; }



                // perhaps the most ludicrous if statement I've ever written.

                // I look forward to seeing if it works if someone ever uses

                // this script on an edit made during the final second of the year.

                if( second !== 59 ) {

                    newTimestamp = year + pad( month ) + pad( day ) + pad( hour ) + pad( minute ) + pad( second + 1 );

                } else if( minute !== 59 ) {

                    newTimestamp = year + pad( month ) + pad( day ) + pad( hour ) + pad( minute + 1 ) + "00";

                } else if( hour !== 23 ) {

                    newTimestamp = year + pad( month ) + pad( day ) + pad( hour + 1 ) + "0000";

                } else {

                    var leapYear = ( ( year % 4 == 0 ) && ( year % 100 != 0 ) ) || ( year % 400 == 0 );

                    var febLen = leapYear ? 29 : 28;

                    var monthLength =  31, febLen, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ][ month ];

                    if( day !== monthLength ) {

                        newTimestamp = year + pad( month ) + pad( day + 1 ) + "000000";

                    } else if( month !== 12 ) {

                        newTimestamp = year + pad( month + 1 ) + "00000000";

                    } else {

                        newTimestamp = ( year + 1 ) + "0000000000";

                    }

                }



                var histUrl = mw.config.get( "wgScript" ) +

                    "?action=history" +

                    "&title=" + encodeURIComponent( mw.config.get( "wgPageName" ) ) +

                    "&offset=" + newTimestamp;

                var contribsUrl = mw.config.get( "wgScript" ) +

                    "?title=Special:Contributions" +

                    "&offset=" + newTimestamp +

                    "&target=" + encodeURIComponent( diffCell.querySelector( "a.mw-userlink" ).textContent );

                $( diffCell ).prepend(

                    $( "<a>", { "href": histUrl } ).text( "History" ),

                    " / ",

                    $( "<a>", { "href": contribsUrl } ).text( "contribs" ),

                    " starting here"

                );

            } );

        } );

    }

} )();