/**
* drawRequirementsGraph Will draw a requirement graph if PEAR::Image_GraphViz is installed
*
* @param boolean $pInstallVersion Use the actual installed version instead of the version that will be in bitweaver after the upgrade
* @param string $pFormat dot output format
* @param string $pCommand dot or neato
* @access public
* @return boolean TRUE on success, FALSE on failure - mErrors will contain reason for failure
*/
function drawRequirementsGraph($pInstallVersion = FALSE, $pFormat = 'png', $pCommand = 'dot')
{
global $gBitSmarty, $gBitThemes;
// only do this if we can load PEAR GraphViz interface
if (@(include_once 'Image/GraphViz.php')) {
ksort($this->mPackages);
$deps = $this->calculateRequirements($pInstallVersion);
$delKeys = $matches = array();
// crazy manipulation of hash to remove duplicate version matches.
// we do this that we can use double headed arrows in the graph below.
foreach ($deps as $key => $req) {
foreach ($deps as $k => $d) {
if ($req['requires'] == $d['package'] && $req['package'] == $d['requires'] && $req['result'] == 'ok' && $d['result'] == 'ok') {
$deps[$key]['dir'] = 'both';
$matches[$key] = $k;
}
}
}
// get duplicates
foreach ($matches as $key => $match) {
unset($delKeys[$match]);
$delKeys[$key] = $match;
}
// remove dupes from hash
foreach ($delKeys as $key) {
unset($deps[$key]);
}
// start drawing stuff
$graph = new Image_GraphViz(TRUE, $gBitThemes->getGraphvizGraphAttributes(), 'Requirements', TRUE);
$fromattributes = $toattributes = $gBitThemes->getGraphvizNodeAttributes();
foreach ($deps as $node) {
//$fromNode = ucfirst( $node['package'] )."\n".$node['package_version'];
//$toNode = ucfirst( $node['requires'] )."\n".$node['required_version']['min'];
$fromNode = ucfirst($node['package']);
$toNode = ucfirst($node['requires']);
switch ($node['result']) {
case 'max_dep':
$edgecolor = 'chocolate3';
$label = 'Maximum version\\nexceeded';
$toNode .= "\n" . $node['required_version']['min'] . " - " . $node['required_version']['max'];
$toattributes['fillcolor'] = 'khaki';
break;
case 'min_dep':
$edgecolor = 'crimson';
$label = 'Minimum version\\nnot met';
$toNode .= "\n" . $node['required_version']['min'];
if (!empty($node['required_version']['max'])) {
$toNode .= " - " . $node['required_version']['max'];
}
$toattributes['fillcolor'] = 'pink';
break;
case 'missing':
$edgecolor = 'crimson';
$label = 'Not installed\\nor activated';
$toNode .= "\n" . $node['required_version']['min'];
if (!empty($node['required_version']['max'])) {
$toNode .= " - " . $node['required_version']['max'];
}
$toattributes['fillcolor'] = 'pink';
break;
default:
$edgecolor = '';
$label = '';
$toattributes['fillcolor'] = 'white';
break;
}
$fromattributes['URL'] = "http://www.bitweaver.org/wiki/" . ucfirst($node['package']) . "Package";
$graph->addNode($fromNode, $fromattributes);
$toattributes['URL'] = "http://www.bitweaver.org/wiki/" . ucfirst($node['requires']) . "Package";
$graph->addNode($toNode, $toattributes);
$graph->addEdge(array($fromNode => $toNode), $gBitThemes->getGraphvizEdgeAttributes(array('dir' => !empty($node['dir']) ? $node['dir'] : '', 'color' => $edgecolor, 'fontcolor' => $edgecolor, 'label' => $label)));
}
if (preg_match("#(png|gif|jpe?g|bmp|svg|tif)#i", $pFormat)) {
$graph->image($pFormat, $pCommand);
} else {
return $graph->fetch($pFormat, $pCommand);
}
} else {
return FALSE;
}
}
/**
* This method returns a list of absolute paths containing the location of
* images that inlustrate a specific workflow. Such images are generated
* each workflow specification.
* If any requested image is not present or if it's older than the
* workflow's configuration file, all images for such workflow are
* generated.
*
* @warning This method requires GraphViz.
*
* @param string $workflowName Workflow name to look for.
* @return string[string] Returns a list of paths containing these keys:
* WKFL_AFIELD_FILE, WKFL_AFIELD_THUMB (these are defined constants).
*/
public function graphPath($workflowName)
{
//
// Defautl values.
$out = false;
//
// Checking and including library.
if (@(require_once 'Image/GraphViz.php')) {
//
// Checking required directories permissions.
$this->checkGraphsDirectories();
//
// Global dependencies.
global $WKFLDefaults;
//
// Default values.
$generateIt = false;
//
// Retrieving the workflow.
$workflow = $this->getWorkflow($workflowName);
//
// Guessing paths.
$graphPath = Sanitizer::DirPath("{$WKFLDefaults[WKFL_DEFAULTS_GRAPHS_PATH]}/{$workflowName}.png");
$graphThumbPath = Sanitizer::DirPath("{$WKFLDefaults[WKFL_DEFAULTS_GRAPHS_PATH]}/{$workflowName}-256px.png");
//
// Checking paths existence.
if (!$generateIt && (!is_file($graphPath) || !is_file($graphThumbPath))) {
$generateIt = true;
}
//
// Checking paths' last modification dates.
if (!$generateIt) {
$workflowTime = filemtime($workflow->path());
$generateIt = filemtime($graphPath) < $workflowTime || filemtime($graphThumbPath) < $workflowTime;
}
//
// Do these images have to be generated?
if ($generateIt) {
//
// Logging pre-generation information.
$this->_log->log(LGGR_LOG_LEVEL_INFO, "Gereating graph for '{$workflowName}'.");
$this->_log->log(LGGR_LOG_LEVEL_DEBUG, "Workflow '{$workflowName}' graph path: '{$graphPath}'");
$this->_log->log(LGGR_LOG_LEVEL_DEBUG, " thumb path: '{$graphThumbPath}'");
//
// Creating an image.
$graph = new \Image_GraphViz();
//
// Addind begining node.
$graph->addNode('BEGIN', ['shape' => 'circle', 'label' => '', 'color' => 'black']);
//
// Configuration shortcut.
$workflowConfig = $workflow->config();
//
// Creating a squared node for each step.
foreach ($workflowConfig->steps as $stepName => $step) {
$graph->addNode($stepName, array('label' => $stepName, 'shape' => 'box'));
}
//
// Addind ending node.
$graph->addNode('END', ['shape' => 'circle', 'label' => '', 'color' => 'black', 'style' => 'filled']);
//
// Linking the beginning node to the first step.
$graph->addEdge(['BEGIN' => $workflowConfig->startsAt]);
//
// Linking all steps based on connections
// confiugrations.
foreach ($workflowConfig->steps as $stepName => $step) {
//
// Checking each connection for current
// step.
foreach ($step->connections as $connName => $conn) {
//
// Checking if this connection
// either changes the flow status
// or sets the next step.
if (isset($conn->status)) {
//
// Checking what change is taking.
switch ($conn->status) {
case WKFL_ITEM_FLOW_STATUS_FAILED:
case WKFL_ITEM_FLOW_STATUS_DONE:
//
// These statuses link to the end.
$graph->addEdge([$stepName => 'END'], ['label' => $connName, 'fontcolor' => 'brown', 'color' => 'brown']);
break;
case WKFL_ITEM_FLOW_STATUS_WAIT:
//
// Basic attributes for each link.
$attrs = ['label' => "{$connName}\n[wait]", 'color' => 'orange', 'fontcolor' => 'orange', 'style' => 'dashed'];
//
// Checking if this waiting has some extra
// configuration.
if (isset($conn->wait)) {
//
// This status creates a vitual node
// representing the waiting step.
$nodeName = "wait_{$stepName}";
$graph->addNode($nodeName, ['shape' => 'box', 'label' => "wait:{$stepName}", 'fontcolor' => 'orange', 'color' => 'orange']);
//
// Linking the current step to this
// virtual node.
$graph->addEdge([$stepName => $nodeName], $attrs);
//
// Linking the virtual node to the current
// one for less attempts than a limit.
$attrs['label'] = "{$connName}\n[wait<={$conn->wait->attempts}]";
$graph->addEdge([$nodeName => $stepName], $attrs);
//
// Linking the virtual node something else
// for more attempts than a limit.
$attrs['label'] = "{$connName}\n[wait>{$conn->wait->attempts}]";
if (isset($conn->wait->status)) {
//
// Linking to the end.
$graph->addEdge([$nodeName => 'END'], $attrs);
} elseif (isset($conn->wait->step)) {
//
// Linking to another step.
$graph->addEdge([$nodeName => $conn->wait->step], $attrs);
}
} else {
$nextStep = isset($conn->step) ? $conn->step : $stepName;
$graph->addEdge([$stepName => $nextStep], $attrs);
}
break;
}
} elseif (isset($conn->step)) {
//
// Linking this step to
// the next one.
$graph->addEdge([$stepName => $conn->step], ['label' => $connName, 'fontcolor' => 'darkgreen', 'color' => 'darkgreen']);
}
}
}
//
// Saving the generated graphic in two locations,
// one for the actual image and other for 256
// pixels thumbnail.
file_put_contents($graphPath, $graph->fetch('png'));
file_put_contents($graphThumbPath, $graph->fetch('png'));
//
// Croping thumbnail.
self::CropImage($graphThumbPath, 256);
}
//
// Building the returning information.
$out = array(WKFL_AFIELD_FILE => $graphPath, WKFL_AFIELD_THUMB => $graphThumbPath);
} else {
//
// Logging the error of not having the proper library.
$this->_log->log(LGGR_LOG_LEVEL_ERROR, "Pear GraphViz plugin hasn't been installed.");
}
return $out;
}