Chris@0: <?php
Chris@0: namespace Composer\Installers;
Chris@0: 
Chris@0: use Composer\IO\IOInterface;
Chris@0: use Composer\Composer;
Chris@0: use Composer\Package\PackageInterface;
Chris@0: 
Chris@0: abstract class BaseInstaller
Chris@0: {
Chris@0:     protected $locations = array();
Chris@0:     protected $composer;
Chris@0:     protected $package;
Chris@0:     protected $io;
Chris@0: 
Chris@0:     /**
Chris@0:      * Initializes base installer.
Chris@0:      *
Chris@0:      * @param PackageInterface $package
Chris@0:      * @param Composer         $composer
Chris@0:      * @param IOInterface      $io
Chris@0:      */
Chris@0:     public function __construct(PackageInterface $package = null, Composer $composer = null, IOInterface $io = null)
Chris@0:     {
Chris@0:         $this->composer = $composer;
Chris@0:         $this->package = $package;
Chris@0:         $this->io = $io;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Return the install path based on package type.
Chris@0:      *
Chris@0:      * @param  PackageInterface $package
Chris@0:      * @param  string           $frameworkType
Chris@0:      * @return string
Chris@0:      */
Chris@0:     public function getInstallPath(PackageInterface $package, $frameworkType = '')
Chris@0:     {
Chris@0:         $type = $this->package->getType();
Chris@0: 
Chris@0:         $prettyName = $this->package->getPrettyName();
Chris@0:         if (strpos($prettyName, '/') !== false) {
Chris@0:             list($vendor, $name) = explode('/', $prettyName);
Chris@0:         } else {
Chris@0:             $vendor = '';
Chris@0:             $name = $prettyName;
Chris@0:         }
Chris@0: 
Chris@0:         $availableVars = $this->inflectPackageVars(compact('name', 'vendor', 'type'));
Chris@0: 
Chris@0:         $extra = $package->getExtra();
Chris@0:         if (!empty($extra['installer-name'])) {
Chris@0:             $availableVars['name'] = $extra['installer-name'];
Chris@0:         }
Chris@0: 
Chris@0:         if ($this->composer->getPackage()) {
Chris@0:             $extra = $this->composer->getPackage()->getExtra();
Chris@0:             if (!empty($extra['installer-paths'])) {
Chris@0:                 $customPath = $this->mapCustomInstallPaths($extra['installer-paths'], $prettyName, $type, $vendor);
Chris@0:                 if ($customPath !== false) {
Chris@0:                     return $this->templatePath($customPath, $availableVars);
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         $packageType = substr($type, strlen($frameworkType) + 1);
Chris@0:         $locations = $this->getLocations();
Chris@0:         if (!isset($locations[$packageType])) {
Chris@0:             throw new \InvalidArgumentException(sprintf('Package type "%s" is not supported', $type));
Chris@0:         }
Chris@0: 
Chris@0:         return $this->templatePath($locations[$packageType], $availableVars);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * For an installer to override to modify the vars per installer.
Chris@0:      *
Chris@0:      * @param  array $vars
Chris@0:      * @return array
Chris@0:      */
Chris@0:     public function inflectPackageVars($vars)
Chris@0:     {
Chris@0:         return $vars;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets the installer's locations
Chris@0:      *
Chris@0:      * @return array
Chris@0:      */
Chris@0:     public function getLocations()
Chris@0:     {
Chris@0:         return $this->locations;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Replace vars in a path
Chris@0:      *
Chris@0:      * @param  string $path
Chris@0:      * @param  array  $vars
Chris@0:      * @return string
Chris@0:      */
Chris@0:     protected function templatePath($path, array $vars = array())
Chris@0:     {
Chris@0:         if (strpos($path, '{') !== false) {
Chris@0:             extract($vars);
Chris@0:             preg_match_all('@\{\$([A-Za-z0-9_]*)\}@i', $path, $matches);
Chris@0:             if (!empty($matches[1])) {
Chris@0:                 foreach ($matches[1] as $var) {
Chris@0:                     $path = str_replace('{$' . $var . '}', $$var, $path);
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return $path;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Search through a passed paths array for a custom install path.
Chris@0:      *
Chris@0:      * @param  array  $paths
Chris@0:      * @param  string $name
Chris@0:      * @param  string $type
Chris@0:      * @param  string $vendor = NULL
Chris@0:      * @return string
Chris@0:      */
Chris@0:     protected function mapCustomInstallPaths(array $paths, $name, $type, $vendor = NULL)
Chris@0:     {
Chris@0:         foreach ($paths as $path => $names) {
Chris@0:             if (in_array($name, $names) || in_array('type:' . $type, $names) || in_array('vendor:' . $vendor, $names)) {
Chris@0:                 return $path;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return false;
Chris@0:     }
Chris@0: }