From d715b1a779e3e890dee1e02469be0794a214f8d3 Mon Sep 17 00:00:00 2001
From: Damian Mooyman <damian@silverstripe.com>
Date: Mon, 12 Sep 2016 17:37:50 +1200
Subject: [PATCH] proof of concept

---
 .editorconfig           | 15 +++++++
 src/RecipeInstaller.php | 90 +++++++++++++++++++++++++++++++++++------
 2 files changed, 93 insertions(+), 12 deletions(-)
 create mode 100644 .editorconfig

diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..aa9a047
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,15 @@
+# This file is for unifying the coding style for different editors and IDEs
+# editorconfig.org
+
+# PHP PSR-2 Coding Standards
+# http://www.php-fig.org/psr/psr-2/
+
+root = true
+
+[*.php]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 4
diff --git a/src/RecipeInstaller.php b/src/RecipeInstaller.php
index b1fb84f..c171908 100644
--- a/src/RecipeInstaller.php
+++ b/src/RecipeInstaller.php
@@ -9,6 +9,11 @@ use Composer\IO\IOInterface;
 use Composer\Package\PackageInterface;
 use Composer\Repository\InstalledRepositoryInterface;
 use Composer\Util\Filesystem;
+use FilesystemIterator;
+use Iterator;
+use RecursiveDirectoryIterator;
+use RecursiveIteratorIterator;
+use RegexIterator;
 
 class RecipeInstaller extends LibraryInstaller {
     public function __construct(
@@ -25,19 +30,80 @@ class RecipeInstaller extends LibraryInstaller {
     {
         parent::install($repo, $package);
 
-        // Install recipe skeleton
-        var_dump("Package info:\n");
-        var_dump($package);
-        var_dump($this->getInstallPath($package));
-        var_dump($package->getExtra());
-
-        var_dump("Repo info:\n");
-        var_dump($repo);
-        if(file_exists('composer.json')) {
-            var_dump(file_get_contents('composer.json'));
+        // Copy project files to root
+        $destinationPath = getcwd();
+        $name = $package->getName();
+        $extra = $package->getExtra();
+        if (isset($extra['project-files'])) {
+            $this->installProjectFiles($name, $this->getInstallPath($package), $destinationPath, $extra['project-files']);
         }
+    }
 
-        var_dump("Installer info:\n");
-        var_dump($this);
+    /**
+     * Install project files in the specified directory
+     *
+     * @param string $recipe Recipe name
+     * @param string $sourceRoot Base of source files (no trailing slash)
+     * @param string $destinationRoot Base of destination directory (no trailing slash)
+     * @param array $filePatterns List of file patterns in wildcard format (e.g. `code/My*.php`)
+     */
+    public function installProjectFiles($recipe, $sourceRoot, $destinationRoot, $filePatterns)
+    {
+        $fileIterator = $this->getFileIterator($sourceRoot, $filePatterns);
+        foreach($fileIterator as $path => $info) {
+            $relativePath = substr($path, strlen($sourceRoot));
+            $destination = $destinationRoot . $relativePath;
+
+            // Only copy non-existent files
+            if (file_exists($destination)) {
+                continue;
+            }
+            $this->io->write("Installing recipe <info>$recipe</info> file <info>$relativePath</info>");
+            $this->filesystem->ensureDirectoryExists(dirname($destination));
+            file_put_contents($destination, file_get_contents($path));
+        }
+    }
+
+    /**
+     * Get iterator of matching source files to copy
+     *
+     * @param string $sourceRoot Root directory of sources (no trailing slash)
+     * @param array $patterns List of wildcard patterns to match
+     * @return Iterator File iterator, where key is path and value is file info object
+     */
+    public function getFileIterator($sourceRoot, $patterns) {
+        // Build regexp pattern
+        $expressions = [];
+        foreach($patterns as $pattern) {
+            $expressions[] = $this->globToRegexp($pattern);
+        }
+        $regExp = '#' . $this->globToRegexp($sourceRoot . '/').'(('.implode(')|(', $expressions).'))#';
+
+        // Build directory iterator
+        $directoryIterator = new RecursiveDirectoryIterator(
+            $sourceRoot,
+            FilesystemIterator::SKIP_DOTS
+                | FilesystemIterator::UNIX_PATHS
+                | FilesystemIterator::KEY_AS_PATHNAME
+                | FilesystemIterator::CURRENT_AS_FILEINFO
+        );
+
+        // Return filtered iterator
+        $iterator = new RecursiveIteratorIterator($directoryIterator);
+        return new RegexIterator($iterator, $regExp);
+    }
+
+    /**
+     * Convert glob pattern to regexp
+     *
+     * @param string $glob
+     * @return string
+     */
+    protected function globToRegexp($glob) {
+        $sourceParts = explode('*', $glob);
+        $regexParts = array_map(function($part) {
+            return preg_quote($part, '#');
+        }, $sourceParts);
+        return implode('(.+)', $regexParts);
     }
 }