Extension:Workflow.php

From Organic Design wiki
Revision as of 00:26, 8 November 2008 by Nad (talk | contribs) (almost there but not quite working yet)

<?php /** 

* Extension:Workflow
*
Info.svg These are the MediaWiki extensions we're using and/or developing. Please refer to the information on the mediawiki.org wiki for installation and usage details. Extensions here which have no corresponding mediawiki article are either not ready for use or have been superseded. You can also browse our extension code in our local Subversion repository or our GitHub mirror.

Template:PhpCategory:Extensions created with Template:Extension 

* @package MediaWiki
* @subpackage Extensions
* @author Aran Dunkley User:Nad
* @licence GNU General Public Licence 2.0 or later
* Started: 2007-10-06
*/

if (!defined('MEDIAWIKI')) die("Not an entry point.");

define('WORKFLOW_VERSION', "0.1.1, 2008-11-08");

$wgWorkflowUpdateDelay = 1000; # Delay in milliseconds after clicking state before Ajax update is made

$wgExtensionCredits['parserhook'][] = $wgExtensionCredits['specialpage'][] = array( 'name' => "Workflow", 'author' => "User:Nad", 'description' => "Adds the ability for articles to be part of workflow sequences and easily moved dynamically between phases in the sequence using AJAX.", 'url' => "http://www.mediawiki.org/wiki/Extension:Workflow", 'version' => WORKFLOW_VERSION );

/** 

* Define a new specialpage for displaying a list of workflows
*/

require_once "$IP/includes/SpecialPage.php"; class SpecialWorkflow extends SpecialPage {

function SpecialWorkflow() { SpecialPage::SpecialPage(wfMsg('workflow'), , true, false, false, false); }

# Render list function execute($param) { global $wgParser, $wgOut; $wgParser->disableCache(); $this->setHeaders(); $wgOut->addWikiText("Not done yet... discussion at Extension talk:Workflow.php", true); } }

/** 

* Define main workflow class containing all the functionality
*/

class Workflow {

var $magic; # magic word used for the workflow parser-function (set from messages) var $state; # state to update a workflow to in an ajax update request var $name; # name of the workflow to update var $pagename; # the name of the current page (in which the workflows reside) var $cat; # lcoal lang name for "Category" var $title; var $workflowData = array(); # Stores lists of states for used workflows var $currentStates = array(); # Stores current state for used workflows

/** * Constructor */ function Workflow() { global $wgHooks, $wgSiteNotice, $wgExtensionFunctions, $wgWorkflowMagic, $wgExtraNamespaces, $wgAjaxExportList;

# Require NS_WORKFLOW to be defined before installing parser-function or javascript etc if (!defined('NS_WORKFLOW')) {

$wgSiteNotice .= "

The NS_WORKFLOW namespace must be defined. Extension is disabled.

";

return; }

# The parser-function name, special-page name and links all use the word defined in $wgExtraNamespaces[NS_WORKFLOW] #$this->magic = $wgContLang->getNsText(NS_WORKFLOW); $this->magic = $wgExtraNamespaces[NS_WORKFLOW]; # $wgContLang doesn't exist yet

$wgAjaxExportList[] = $this->magic;

# Reserve the magic word for use as a parser-function $wgHooks['LanguageGetMagic'][] = array($this, 'languageGetMagic');

# If it's a workflow-related ajax call, don't use dispatcher (because we need the catlinks generated by normal page render) # - this sets the state, name, pagename and update properties $this->bypassAjaxDispatcher();

# Add the extension's setup function to the list to be called after the environment is up and running $wgExtensionFunctions[] = array($this, 'setup'); }

/** * Extension setup */ function setup() { global $wgParser, $wgLanguageCode, $wgMessageCache, $wgContLang;

$this->cat = $wgContLang->getNsText(NS_CATEGORY);

# Add the messages used (todo: move into i18n) if ($wgLanguageCode == 'en') { $wgMessageCache->addMessages(array( 'workflow' => $this->magic, # NOTE: the parser-function, special-page and link-rendering all use this word 'workflowStateUpdated' => "[[{$this->magic}:$1|$1 {$this->magic}]] state set to [[{$this->cat}:$2|$2]]." )); }

# Add the specialpage to the environment SpecialPage::addPage(new SpecialWorkflow());

# Add the parser-function hook $wgParser->setFunctionHook($this->magic, array($this, 'expandMagic'));

# Add the client-side scripts for changing states $this->addJS(); }

/** * Expand the #workflow to reveal the current state and hide the others and add javascript * - note the hidden states mustn't be rendered because they contain categorisation links which shouldn't be processed */ function expandMagic(&$parser) { global $wgUser, $wgJsMimeType, $wgContLang; $parser->disableCache(); $tmpl = $wgContLang->getNsText(NS_TEMPLATE); $wf = $this->magic;

# Extend catlinks information to include workflows $this->extendCatlinks();

# Populate $argv with both named and numeric parameters $args =; $argv = array(); $items = array(); $name = 'Untitled'; foreach (func_get_args() as $arg) if (!is_object($arg)) { $args .= "|$arg"; if (preg_match("%^(.+?)\\s*=\\s*(.+)$%", $arg, $match)) $argv[$match[1]] = $match[2]; else $argv[] = $arg; } $name = $argv[0];

# Get state list and current state of this workflow $current = $this->loadStates($name); $states = $this->workflowData[$name];

# Make a clone of the parser for parsing without affecting LinkHolder or catlinks arrays $psr = new parser; $opt = ParserOptions::newFromUser($wgUser);

# Build links for workflow table $title = Title::newFromText($name, NS_WORKFLOW); $edit = $title->userCan('edit'); $url = $title->getLocalUrl(); $href = "href='$url'"; $anchor = "$wf:$name"; if (is_object($title) && $title->exists()) { if (count($states)<1) $anchor .= " (".wfMsg('workflowMissingContent').")"; } else $href .= " class='new'"; $html = "<a $href title='$anchor'>$anchor</a>";

# Transclude each (use a parser clone for the ones which aren't current to avoid categorisation) if (count($states)) { if ($edit) {

$left = "<a href='javascript:;'><</a>"; $right = "<a href='javascript:;'>></a>";

}

else $left = $right = ""; # no menu buttons if not allowed to edit $html = "

";

$data = ""; $ci = 0; foreach ($states as $i => $state) { $stitle = Title::newFromText($state, NS_TEMPLATE); $surl = $stitle->getLocalUrl(); $data .= ",'$state'"; $style = "display:none"; if (empty($current)) $current = $state; # make current default to first item name $wikitext = $stitle->exists() ? '{'.'{'."$state|state=$state$args}".'}' : "$tmpl:$state"; # transclude or render a red-link if ($state == $current) { $wikitext .= "[[{$this->cat}:$state]]"; # if state is current, add a category link $style = ""; $ci = $i; } $content = $parser->parse($wikitext, $title, $opt, false, $state != $current)->getText();

# Append the menu to the state

$html .= "
$left $right
$content
\n";

}

$html .= "

<script type='$wgJsMimeType'>workflowData['$name']=[$ci$data];</script>\n";

}

return array($html, 'isHTML' => true, 'noparse' => true); }

/** * Extract states from Worklow:Name content if we don't have the list yet * - returns the current state (but only when first loaded) */ function loadStates($name) { $current = ; if (isset($this->workflowData[$name])) $states = $this->workflowData[$name]; else { $this->workflowData[$name] = array(); $this->currentStates[$name] = ; $title = Title::newFromText($name, NS_WORKFLOW); if (is_object($title) && $title->exists()) {

# Extract the links from the workflow article $article = new Article($title); if (preg_match_all("%^\\*\\s*\\[{2}\\s*(.+?:)?\\s*(.+?)\\s*\\]{2}%m", $article->getContent(), $match)) $this->workflowData[$name] = $match[2];

# Extract the current state from the first matching category in the article global $wgTitle; $article = new Article($wgTitle); $cats = join('|', $this->workflowData[$name]); if (preg_match("%\s*\[\[{$this->cat}:($cats)\]\]\s*%", $article->getContent(), $match)) $this->currentStates[$name] = $match[1]; } } return $this->currentStates[$name]; }

/** * Update the current state of a workflow item in the requested article * - the actual article edit is done in returnCatlinks after all parsing finished * - this disables the parser-cache */ function updateState(&$parser, &$text) { $this->loadStates($this->name); static $i = 0; if ($i++ < 1 && isset($this->workflowData[$this->name]) && count($this->workflowData[$this->name]) > 1) { $cats = join('|', $this->workflowData[$this->name]); $this->text = preg_replace("%\s*\[\[{$this->cat}:($cats)\]\]\s*%", "", $text)."\n[[{$this->cat}:{$this->state}]]"; $parser->disableCache(); } return true; }

/** * Extend catlinks information to include workflows */ function extendCatlinks() { static $done = 0; if ($done++) return; global $wgUser; $skin = $wgUser->getSkin();

# Create a new Skin class (WorkflowSkin) by extending the existing one with overridden getCategoryLinks method $class = get_class($skin); eval("class WorkflowSkin extends {$class} ".'{ function getCategories() { global $wgWorkflow; return $wgWorkflow->renderWorkflowInfo(parent::getCategories()); } }');

# Replace user's skin with a WorkflowSkin replica $wgUser->mSkin = new WorkflowSkin(); foreach (array_keys(get_class_vars($class)) as $k) $wgUser->mSkin->$k = $skin->$k; }

/** * Render the workflow info which appears in the catlinks area */ function renderWorkflowInfo(&$catlinks) { if (count($this->workflowData)) {

$table = "

";

foreach ($this->workflowData as $name => $states) { $title = Title::newFromText($name, NS_WORKFLOW); $anchor = $title->getText();

$catlinks .= "$table<a href='{$title->getLocalURL()}'>$anchor</a>: 		";

$current = $this->currentStates[$name]; $sep = " "; foreach ($states as $state) { $title = Title::newFromText($state, NS_CATEGORY); $class = $current == $state ? 'current' : ; $class .= $title->exists() ?  : ' new'; $catlinks .= "$sep<a class='$class' href='{$title->getLocalURL()}'>$state</a>"; $sep = " → "; }

$table = "
";

}

$catlinks .= "

\n";

} return $catlinks; }

/** * Return just the catlinks to the client after updating a tag state * - the article is updated here if replacement text has been set */ function returnCatlinks(&$out, &$text) { global $wgUser, $wgOut, $wgTitle; if ($this->text) { $article = new Article($wgTitle); $article->doEdit($this->text, wfMsg('workflowStateUpdated', $this->name, $this->state), EDIT_UPDATE); } $skin = $wgUser->getSkin(); $catlinks = is_object($skin) ? $skin->getCategories() : "Error: no skin!"; $wgOut->disable(); wfResetOutputBuffers(); header("Cache-Control: no-cache, must-revalidate"); header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); print $catlinks; return false; }

/** * Make necessary Javascript functions available to the page */ function addJS() { global $wgOut, $wgJsMimeType, $wgWorkflowUpdateDelay; $wgOut->addScript("<script type='$wgJsMimeType'> var workflowData = []; var workflowUpdate = 0; var workflowLastState = 0; function workflowUpdateState(name) { clearTimeout(workflowUpdate); workflowLastState = workflowData[name][0]; var state = workflowData[name][workflowLastState]; sajax_do_call('{$this->magic}',[wgPageName,name,state],document.getElementById('catlinks')); } function workflowSwitchState(name,dir) { clearTimeout(workflowUpdate); document.getElementById('workflow-'+name+'-'+workflowData[name][0]).setAttribute('style','display:none'); if (workflowLastState == 0) workflowLastState = workflowData[name][0]; workflowData[name][0] += dir; if (workflowData[name][0] < 1) workflowData[name][0] = workflowData[name].length-1; if (workflowData[name][0] > workflowData[name].length-1) workflowData[name][0] = 1; var state = workflowData[name][0]; document.getElementById('workflow-'+name+'-'+state).setAttribute('style',); if (workflowLastState != state) workflowUpdate = setTimeout('workflowUpdateState(\"'+name+'\")',$wgWorkflowUpdateDelay); } </script>"); }

/** * If it's a workflow-related ajax call, don't use dispatcher (because we need the catlinks generated by normal page render) * - this sets the state, name, pagename and update properties */ function bypassAjaxDispatcher() { global $wgUseAjax, $wgHooks; if ($wgUseAjax && isset($_GET['action']) && $_GET['action'] == 'ajax' && isset($_GET['rs']) && $_GET['rs'] == $this->magic && isset($_GET['rsargs']) && is_array($_GET['rsargs']) ) { list($title, $this->name, $this->state) = $_GET['rsargs']; $wgHooks['ParserBeforeStrip'][] = array($this, 'updateState'); $wgHooks['OutputPageBeforeHTML'][] = array($this, 'returnCatlinks'); $_GET = $_REQUEST = array('title' => $title, 'action' => 'view'); } $this->pagename = isset($_REQUEST['title']) ? $_REQUEST['title'] : ; $this->text = ; }

/** * Needed in some versions to prevent Special:Version from breaking */ function __toString() { return 'Workflow'; }

/** * Set up the magic words */ function languageGetMagic(&$magicWords, $langCode = 0) { $magicWords[$this->magic] = array($langCode, $this->magic); return true; } }

$wgWorkflow = new Workflow();

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