add plugin support

2 files changed, 63 insertions, 0 deletions

diff --git a/Digitigrade/PluginLoader.php b/Digitigrade/PluginLoader.php
new file mode 100644
index 0000000..094f1b6
--- /dev/null
+++ b/Digitigrade/PluginLoader.php
@@ -0,0 +1,46 @@
+<?php
+namespace Digitigrade;
+
+abstract class PluginLoader {
+    public static array $loadedPlugins = [];
+
+    public static function load(string $path): bool {
+        try {
+            $phar = @new \Phar($path);
+        } catch (\Exception $e) {
+            Logger::getInstance()->warning("$path doesn't appear to be a valid phar file!");
+        }
+        $metadata = $phar->getMetadata();
+        if (!($metadata instanceof PluginMetadata)) {
+            Logger::getInstance()->warning("$path doesn't appear to be a valid plugin!");
+            return false;
+        }
+        self::$loadedPlugins[$path] = $metadata;
+
+        // setup autoloads
+        spl_autoload_register(function (string $className) use ($path, $metadata, $phar) {
+            /** @var PluginMetadata $metadata */
+            /** @var \Phar $phar */
+            if (str_starts_with($className, $metadata->autoloadPrefix)) {
+                require "phar://$path/"
+                    . $metadata->autoloadDir
+                    . str_replace('\\', '/',
+                        substr_replace($className, '', 0, strlen($metadata->autoloadPrefix)))
+                    . '.php';
+            }
+        });
+
+        // run entrypoint if defined
+        if (isset($metadata->entrypoint)) {
+            require "phar://$path/$metadata->entrypoint";
+        }
+
+        return true;
+    }
+
+    public static function loadDir(string $directory) {
+        foreach (glob("$directory/*.phar") as $file) {
+            self::load($file);
+        }
+    }
+}
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diff --git a/Digitigrade/PluginMetadata.php b/Digitigrade/PluginMetadata.php
new file mode 100644
index 0000000..296295f
--- /dev/null
+++ b/Digitigrade/PluginMetadata.php
@@ -0,0 +1,17 @@
+<?php
+namespace Digitigrade;
+
+class PluginMetadata {
+    // basic info
+    public string $name;
+    public string $author;
+    public ?string $homepage;
+    public string $version;
+
+    // autoload info
+    public string $autoloadPrefix;
+    public string $autoloadDir;
+
+    // entrypoint (ran when the plugin is loaded)
+    public ?string $entrypoint;
+}
\ No newline at end of file