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<?php
/* Icinga Web 2 | (c) 2018 Icinga Development Team | GPLv2+ */
namespace Icinga\Module\Monitoring\Web\Helper;
use Icinga\Application\Logger;
use Icinga\Web\Hook;
/**
* Renderer for plugin output based on hooks
*/
class PluginOutputHookRenderer
{
/** @var array */
protected $commandMap = [];
/**
* Register PluginOutput hooks
*
* Map PluginOutput hooks to their responsible commands.
*
* @return $this
*/
public function registerHooks()
{
if (! Hook::has('monitoring/PluginOutput')) {
return $this;
}
foreach (Hook::all('monitoring/PluginOutput') as $hook) {
/** @var \Icinga\Module\Monitoring\Hook\PluginOutputHook $hook */
try {
$commands = $hook->getCommands();
} catch (\Exception $e) {
Logger::error(
'Failed to get applicable commands from hook "%s". An error occurred: %s',
get_class($hook),
$e
);
continue;
}
if (! is_array($commands)) {
$commands = [$commands];
}
foreach ($commands as $command) {
if (! isset($this->commandMap[$command])) {
$this->commandMap[$command] = [];
}
$this->commandMap[$command][] = $hook;
}
}
return $this;
}
protected function renderCommand($command, $output, $detail)
{
if (isset($this->commandMap[$command])) {
foreach ($this->commandMap[$command] as $hook) {
/** @var \Icinga\Module\Monitoring\Hook\PluginOutputHook $hook */
try {
$output = $hook->render($command, $output, $detail);
} catch (\Exception $e) {
Logger::error(
'Failed to render plugin output from hook "%s". An error occurred: %s',
get_class($hook),
$e
);
continue;
}
}
}
return $output;
}
/**
* Render the given plugin output based on the specified check command
*
* Traverse all hooks which are responsible for the specified check command and call their `render()` methods.
*
* @param string $command Check command
* @param string $output Plugin output
* @param bool $detail Whether the output is requested from the detail area
*
* @return string
*/
public function render($command, $output, $detail)
{
if (empty($this->commandMap)) {
return $output;
}
$output = $this->renderCommand('*', $output, $detail);
$output = $this->renderCommand($command, $output, $detail);
return $output;
}
}
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