🏗️(caldav) migrate from davical to sabre/dav

docker/sabredav/src/AutoCreatePrincipalBackend.php

@@ -0,0 +1,53 @@
+<?php
+/**
+ * Custom principal backend that auto-creates principals when they don't exist.
+ * This allows Apache authentication to work without pre-creating principals.
+ */
+
+namespace Calendars\SabreDav;
+
+use Sabre\DAVACL\PrincipalBackend\PDO as BasePDO;
+use Sabre\DAV\MkCol;
+
+class AutoCreatePrincipalBackend extends BasePDO
+{
+    /**
+     * Returns a specific principal, specified by it's path.
+     * Auto-creates the principal if it doesn't exist.
+     *
+     * @param string $path
+     *
+     * @return array|null
+     */
+    public function getPrincipalByPath($path)
+    {
+        $principal = parent::getPrincipalByPath($path);
+        
+        // If principal doesn't exist, create it automatically
+        if (!$principal && strpos($path, 'principals/') === 0) {
+            // Extract username from path (e.g., "principals/user@example.com" -> "user@example.com")
+            $username = substr($path, strlen('principals/'));
+            
+            // Create principal directly in database
+            // Access protected pdo property from parent
+            $pdo = $this->pdo;
+            $tableName = $this->tableName;
+            
+            try {
+                $stmt = $pdo->prepare(
+                    'INSERT INTO ' . $tableName . ' (uri, email, displayname) VALUES (?, ?, ?) ON CONFLICT (uri) DO NOTHING'
+                );
+                $stmt->execute([$path, $username, $username]);
+                
+                // Retry getting the principal
+                $principal = parent::getPrincipalByPath($path);
+            } catch (\Exception $e) {
+                // If creation fails, return null
+                error_log("Failed to auto-create principal: " . $e->getMessage());
+                return null;
+            }
+        }
+        
+        return $principal;
+    }
+}