User:Quarl/rollback.js

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Documentation for this user script can be added at User:Quarl/rollback.

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// User:quarl/rollback.js - rollback button.

// requires wikipage.js, util.js, md5.js

// based on http://sam.zoy.org/wikipedia/godmode-light.js

// <pre><nowiki>

// -----------------------------------------------------------------------------
// God-like Monobook skin
// (c) 2005 Sam Hocevar <sam@zoy.org>
// $Id: godmode-light.js 980 2005-11-12 01:51:51Z sam $
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
// Language support, taken from phase3/languages/*
// -----------------------------------------------------------------------------
var rollbacklink = 'rollback';
var cantrollback = 'Cannot revert edit; last contributor is only author of this page.';
var alreadyrolled = 'Cannot rollback last edit of [[$1]] by [[User:$2|$2]] ([[User talk:$2|Talk]]); someone else has edited or rolled back the page already. Last edit was by [[User:$3|$3]] ([[User talk:$3|Talk]]). ';
var revertpage = 'Reverted edits by [[User:$2|$2]] ([[User talk:$2|t]]) ([[Special:Contributions/$2|c]]) to last version by $1';

var xmlhttp;

// -----------------------------------------------------------------------------
// Our nice Revert functions
// -----------------------------------------------------------------------------
var gml_vandal, gml_editor;

function rollback_Revert() {
    if (queryVars['fakeaction'] != 'rollback') return;

    var token = queryVars['token'];
    gml_vandal = queryVars['vandal'];

    document.cont = document.getElementById('bodyContent');

    document.cont.innerHTML = 'Please wait, reverting edits by ' + gml_vandal + '...';
    // Avoid XSS kiddies by using a special token
    if (!token || token != rollback_mkToken(gml_vandal)) {
        document.cont.innerHTML += 'ERROR: Bad authentication token!';
        return;
    }

    xmlhttp = HTTPClient();
    if (!xmlhttp) return;
    document.getElementById('bodyContent').innerHTML += '<br />Getting article history...';
    xmlhttp.open("GET", wikiPage.qurl + '&action=history&limit=50', true);
    xmlhttp.overrideMimeType('text/xml');
    xmlhttp.onreadystatechange = rollback_Revert2;
    xmlhttp.send(null);
}

function rollback_Revert2() {
    if (xmlhttp.readyState != 4) return;
    var l;
    var oldid;
    // Get the vandal and new editor names
    gml_editor = null;
    doc = xmlhttp.responseXML;
    l = doc.getElementById('pagehistory').getElementsByTagName('li');
    for (i = 0; i < l.length; i++) {
        var wp = new WikiPage(l[i].getElementsByTagName('span')[0].getElementsByTagName('a')[0]);
        if (!wp.nsUserP) continue; // bad URL
        var name = wp.article;
        if (i == 0) {
            if (name != gml_vandal) {
                document.cont.innerHTML += '<br />Error: Last editor is ' + name + ', not ' + gml_vandal + '!';
                return;
            }
        } else {
            if (name != gml_vandal) {
                oldid = l[i].getElementsByTagName('input')[0].value;
                gml_editor = name;
                break;
            }
        }
    }
    if (!gml_editor) {
        document.cont.innerHTML += '<br />Error: ' + gml_vandal + ' is the only editor!';
        return;
    }

    var url = wikiPage.qurl + '&action=edit&oldid=' + oldid;
    document.cont.innerHTML += '<br />Getting article edit form...';
    xmlhttp = HTTPClient();
    xmlhttp.open('GET', url, true);
    xmlhttp.onreadystatechange = rollback_Revert3;
    xmlhttp.overrideMimeType('text/xml');
    xmlhttp.send(null);
}

function rollback_Revert3() {
    if (xmlhttp.readyState != 4) return;
    var form, newform, l;
    // Insert the downloaded form in our current page, using
    // only hidden form inputs.
    doc = xmlhttp.responseXML;
    form = doc.getElementById('editform');
    newform = document.createElement('form');
    l = form.getElementsByTagName('textarea');
    for (i = l.length; i--; ) {
        var t = document.createElement('input');
        t.type = 'hidden';
        t.name = l[i].name;
        t.value = l[i].value;
        newform.appendChild(t);
    }
    l = form.getElementsByTagName('input');
    for (i = l.length; i--; ) {
        if (l[i].name == 'wpSummary') {
            l[i].value = revertpage.replace(/\$1/g, gml_editor).replace(/\$2/g, gml_vandal);
        } else if (l[i].name == 'wpMinoredit') {
            l[i].value = '1';
        } else if (l[i].name == 'wpWatchthis') {
            if (!l[i].checked)
            continue; // Don't touch the "watch" status
            l[i].value = "on";
        } else if (l[i].name == 'wpPreview') {
            continue;
        } else if (l[i].name == 'wpDiff') {
            continue;
        }
        l[i].type = 'hidden';
        newform.appendChild(l[i]);
     }
     newform.name = form.name;
     newform.method = form.method;
     newform.id = form.id;
     newform.action = form.action;
     document.cont.innerHTML += '<br />Submitting form...';
     document.cont.appendChild(newform);
     newform.submit();  // Submit the form
}

function rollback_link_to_username(link) {
    return link && (new WikiPage(link)).article;
}

function rollback_mkToken(vandal) {
    return hex_md5(wikiPage.page + '%' + vandal + '%' + document.cookie);
}

function rollback_mkUrl(wp, vandal) {
    return url_getpath(wp.qurl + '&fakeaction=rollback&vandal=' + 
                       escape(vandal) + '&token=' + escape(rollback_mkToken(vandal));
}

// -----------------------------------------------------------------------------
// Add revert buttons to the page
// -----------------------------------------------------------------------------
function rollback_AddButtonDiff() {
    var difftag = getElementsByClass('diff-ntitle',document.getElementById('bodyContent'),'td')[0];
    if (!difftag) return;

    // if toplink has an oldid then this is not a diff against current revision.
    var toplink = difftag.getElementsByTagName('a')[0].href;
    if (toplink.match(/oldid=/)) return;

    var vandal = rollback_link_to_username(difftag.getElementsByTagName('a')[1]);
    if (!vandal) { alert("Couldn't parse username in diff page!"); return; }

    var url = rollback_mkUrl(wikiPage,vandal);
    var newtext = ' &nbsp;&nbsp;&nbsp;<strong>[<a href="' + url + '">' + rollbacklink + '</a>]</strong> ';

    difftag.innerHTML = difftag.innerHTML.replace(/(<\/a>)\)( *<br)/i, '$1'+newtext+'$2');
}

function rollback_AddButtonContributions() {
    if (wikiPage.page != 'Special:Contributions') return;

    var vandal = rollback_link_to_username(document.getElementById('contentSub').getElementsByTagName('a')[0]);
    if (!vandal) { alert("Couldn't parse user for Special:Contributions page"); return; }

    var l = document.getElementById('bodyContent').getElementsByTagName('li');
    for (i = 0; i < l.length; i++) {
        var t = l[i].innerHTML;
        // If we are already a sysop on this wiki, abort
        if (t.match(/>rollback<\/a>]/)) return;

        if (t.match(/<strong> \(/)) {
            var wp = new WikiPage(l[i].getElementsByTagName('a')[0].href);
            var url = rollback_mkUrl(wp,vandal);
            l[i].innerHTML += ' [<a href="' + url + '">' + rollbacklink + '</a>]';
        }
    }
}

function rollback_Load() {
    rollback_Revert();
    rollback_AddButtonDiff();
    rollback_AddButtonContributions();
}

addOnloadHook(rollback_Load);

// </nowiki></pre>