// [[User:Quarl/redirector.js]] - "Redirector" application



// When you invoke the Redirector (through a tab), adds a new form to the

// document.  Start typing page names and press ENTER after each one.  A table

// will show the current status of each page (already a redirect, doesn't

// exist, etc.), and if you click "Redirect!", the target page will be updated

// to redirect to the current page.



// quarl 2006-02-09 initial version



// depends: util.js, wikipage.js, wikiedit.js, wikitabs.js



// <pre><nowiki>



var redirector = new Object();



// seconds between updates

redirector.update_interval = 1.0;



// maximum number of concurrent requests

redirector.max_concurrent_requests = 5;





redirector._entries = [];

redirector._requests_in_progress = 0;



redirector.run = function() {

    redirector.tab.innerHTML = '<a><b>Redirector</b></a>'; // prevent future clicks

    redirector.annotateDocument();

}



addStylesheetRule = function(tag, style) {

    var ss = document.styleSheets0];

    if (ss.insertRule) {

        ss.insertRule(tag + '{' + style + '}', ss.cssRules.length);

    } else if (ss.addRule) {

        ss.addRule(tag, style);

    }

}



redirector.annotateDocument = function() {

    if (document.getElementById('redirector')) {

        // already done, called again for some reason

        return;

    }



    addStylesheetRule('#redirector', 'border: 1px solid red; padding: 1em;');

    addStylesheetRule('#redirector .redirectorStatus .downloading', 'color:grey');

    addStylesheetRule('#redirector .redirectorStatus .empty', 'color:black');

    addStylesheetRule('#redirector .redirectorStatus .toHere', 'color:green');

    addStylesheetRule('#redirector .redirectorStatus .toElsewhere', 'color:red');

    addStylesheetRule('#redirector .redirectorStatus .notRedirect', 'color:red');

    addStylesheetRule('#redirector .redirectorStatus .done', 'color:green');

    addStylesheetRule('#redirector .redirectorStatus .previous', 'text-decoration: line-through; color: #888;');



    var divLoc = document.getElementById('jump-to-nav');

    if (!divLoc) {

        alert("Redirector: couldn't get 'jump-to-nav' (error d5153643-a8c1-46ad-8d8e-c5d3fe066c77)");

        return null;

    }



    redirector.doc = new Object();

    redirector.doc.div = document.createElement('div');

    redirector.doc.div.id = 'redirector';



    redirector.doc.div.innerHTML = (

        '<h2>Redirector</h2>' +

        'Enter names of articles to redirect to <tt>'+wikiPage.page+'</tt>, and press ENTER after each one:' +

        '<form id="rcInputForm"><input type="text" id="rcConsole" name="rcConsole" size="60" value="'+wikiPage.page+'" />' +

        '<input type="submit" onclick="javascript:return redirector.inputClicked()" value="Enter" />' +

        '<input type="submit" onclick="javascript:return redirector.resetClicked()" value="Clear all" />' +

        '</form>' +

        '<table id="rcStatus" class="prettytable"><tr><th>Page</th><th>Status</th><th>Action</th></table>'

        );

    add_after(divLoc, redirector.doc.div);



    redirector.doc.rcConsole = document.getElementById('rcConsole');

    redirector.doc.rcStatus = document.getElementById('rcStatus');



    redirector.doc.rcConsole.focus();



    redirector._timerUpdate();

}



redirector.inputClicked = function() {

    var target = trimspaces(redirector.doc.rcConsole.value);

    if (!target) return false;

    if (target == wikiPage.page) return false;

    redirector.addEntry(target);

    // redirector.doc.rcConsole.value = wikiPage.page;

    return false;

}



redirector.resetClicked = function() {

    for (var i in redirector._entries) {

        redirector._entriesi].clearentry = true;

    }

    return false;

}



redirector.addEntry = function(s) {

    var t = new Object();



    // wiki page

    t.wp = new WikiPage(null, s);

    if (!t.wp) return;



    // delete old entry if any

    for (var i in redirector._entries) {

        if (redirector._entriesi].wp.page == t.wp.page) {

            redirector._entriesi].clearentry = true;

        }

    }



    // object for document status nodes.  null = not yet added

    t.statusnode = null;



    // download request status.  0 = not yet initiated; 1 = initiated; 2 =

    // finished

    t.downloadstatus = 0;



    // WikiEditor instance

    t.editor = null;



    // string value of old contents of target page

    t.oldcontents = null;

    t.oldredirect = null;



    // whether user has clicked "update" button

    t.updatewanted = false;



    // whether update requires confirmation

    t.updatedangerous = false;



    // update request status.  0 = not yet initiated; 1 = iniatited; 2 =

    // completed

    t.updatestatus = 0;



    // whether this entry should be cleared when done with it

    t.clearentry = false;

    t.ignore = false;



    redirector._entries.push(t);

    redirector.update();

}



// main action loop

redirector.update = function() {

    for (var i in redirector._entries) {

        var t = redirector._entriesi];



        if (t.ignore) continue;

        if (t.clearentry) {

            // only clear it if nothing in progress

            if ((t.downloadstatus == 0 || t.downloadstatus == 2) &&

                (t.updatestatus == 0 || t.updatestatus == 2))

            {

                t.statusnode.tr.parentNode.removeChild(t.statusnode.tr);

                t.ignore = true;

                continue;

            }

        }



        if (!t.statusnode) {

            redirector._addStatusNode(t);

        }



        if (redirector._requests_in_progress < redirector.max_concurrent_requests) {

            if (t.downloadstatus == 0) {

                redirector._initiateDownload(t);

            } else if (t.downloadstatus == 2 && t.updatewanted && t.updatestatus == 0) {

                redirector._initiateUpdate(t);

            }

        }

    }

}



redirector._timerUpdate = function() {

    redirector.update();

    setTimeout(redirector._timerUpdate, redirector.update_interval * 1000);

}



redirector._addStatusNode = function(t) {

    t.statusnode = new Object();

    t.statusnode.tr = document.createElement('tr');



    t.statusnode.page = document.createElement('td');

    var url = t.wp.qurl + '&redirect=no';

    var urlEdit = t.wp.qurl + '&action=edit';

    t.statusnode.page.innerHTML = (

        '<a href="' + url + '">' + t.wp.page + '</a>' +

        ' [<a href="' + urlEdit +'">edit</a>]');



    t.statusnode.status = document.createElement('td');

    t.statusnode.status.className = 'redirectorStatus';

    t.statusnode.status.innerHTML = '...';



    t.statusnode.action = document.createElement('td');

    t.statusnode.button = document.createElement('button');

    t.statusnode.button.onclick = function() { redirector._actionClick(t) };

    t.statusnode.button.disabled = true;

    t.statusnode.button.innerHTML = 'please wait';

    t.statusnode.action.appendChild(t.statusnode.button);



    t.statusnode.tr.appendChild(t.statusnode.page);

    t.statusnode.tr.appendChild(t.statusnode.status);

    t.statusnode.tr.appendChild(t.statusnode.action);



    redirector.doc.rcStatus.appendChild(t.statusnode.tr);

}



redirector._actionClick = function(t) {

    if (t.updatedangerous) {

        if (!window.confirm("The target is not a redirect.  Are you sure?")) return;

    }



    t.updatewanted = true;

    t.statusnode.button.disabled = true;

}



redirector._initiateDownload = function(t) {

    t.downloadstatus = 1;

    redirector._requests_in_progress ++;

    t.statusnode.status.innerHTML = '<span class="downloading">downloading...</span>';

    t.wp.getEditorAsync(redirector._downloadComplete, t);

}



redirector._downloadComplete = function(editor, t) {

    t.downloadstatus = 2;

    redirector._requests_in_progress --;

    t.editor = editor;

    t.oldcontents = t.editor.wpTextbox1;



    if (t.oldcontents.match(/^(?:\s|\n)*$/)) {

        t.status = 'empty';

        t.statustext = "empty";

        t.statusnode.button.innerHTML = 'Create redirect!';

        t.statusnode.button.disabled = false;

    } else if (t.oldcontents.match(/^\s*#REDIRECT \[\[(.+?)\]\]/i)) {

        t.oldredirect = RegExp.$1;

        t.oldredirectwp = new WikiPage(null, t.oldredirect);

        if (t.oldredirect == wikiPage.page) {

            t.status = 'toHere';

            t.statustext = 'redirect to here';

            t.statusnode.button.innerHTML = 'Nothing to do!';

            t.statusnode.button.disabled = true;

        } else {

            t.status = 'toElsewhere';

            t.statustext = 'redirect to <a href="'+t.oldredirectwp.url+'">'+t.oldredirectwp.page+'</a>';

            t.statusnode.button.innerHTML = 'Alter redirect!';

            t.updatedangerous = true;

            t.statusnode.button.disabled = false;

        }

    } else {

        t.status = 'notRedirect';

        t.old_wordcount = t.oldcontents.split(/\s+/).length;

        t.statustext = 'non-redirect (' + t.old_wordcount + ' words)';

        t.statusnode.button.innerHTML = 'Change to redirect';

        t.updatedangerous = true;

        t.statusnode.button.disabled = false;

    }



    t.statusnode.status.innerHTML = '<span class="'+t.status+'">' + t.statustext + '</span>';

}



redirector._initiateUpdate = function(t) {

    t.updatestatus = 1;

    t.statusnode.button.innerHTML = 'Submitting...';

    redirector._requests_in_progress ++;

    var rd = t.editor.wpTextbox1 = '#REDIRECT [[' + wikiPage.page + ']]\n';

    if (t.status == 'empty') {

        t.editor.wpSummary = 'Creating ' + rd;

    } else if (t.status == 'toElsewhere') {

        t.editor.wpSummary = 'Changing redirect from [[' + t.oldredirectwp.page + ']] to ' + rd;

    } else if (t.status == 'notRedirect') {

        t.editor.wpSummary = 'Changing article (' + t.old_wordcount + ' words) to ' + rd;

    } else {

        alert("internal error 3056fdaf-1147-4433-8334-d92eb2ffd8b7");

        return;

    }



    t.editor.submitAsync(null, redirector._updateComplete, t);

}



redirector._updateComplete = function(editor, t) {

    t.updatestatus = 2;

    t.statusnode.button.innerHTML = 'Done!';

    redirector._requests_in_progress --;



    t.statusnode.status.innerHTML = '<span class="done">Updated! (<span class="previous">' + t.statustext + '</span>)</span>';

}





redirector._load = function() {

    if (wikiPage.nsSpecialP) return;

    redirector.tab = wikitabs.addToolboxLink('javascript:redirector.run()', 'Redirector', 'ca-redirector');

}



addOnloadHook(redirector._load);



// </nowiki></pre>