feat: REST API endpoints for content snapshots (#54)

Add five endpoints matching the existing backup API pattern:
- GET /snapshots — list with pagination
- POST /snapshot — create (content_types, description)
- POST /snapshot/:id/restore — restore (mode, content_types)
- DELETE /snapshot/:id — delete record + file
- GET /snapshot/:id/download — stream JSON file

ACL: mokosuitebackup.snapshot.manage for write ops, core.manage for read.
Routes registered in webservices plugin alongside backup routes.

Closes #54

CHANGELOG.md

@@ -1,6 +1,11 @@
 # Changelog
 ## [Unreleased]
 
+### Added
+- REST API endpoints for content snapshots: list, create, restore, delete, download (#54)
+- Automatic archive integrity verification after backup creation (#65)
+- CLI command `mokosuitebackup:snapshot` for create, restore, list, and delete operations (#55)
+
 ## [01.30.00] --- 2026-06-22
 
 ## [01.30.00] --- 2026-06-22

source/packages/com_mokosuitebackup/api/src/Controller/SnapshotsController.php

@@ -0,0 +1,307 @@
+<?php
+
+/**
+ * @package     MokoSuiteBackup
+ * @subpackage  com_mokosuitebackup
+ * @author      Moko Consulting <hello@mokoconsulting.tech>
+ * @copyright   Copyright (C) 2026 Moko Consulting. All rights reserved.
+ * @license     GNU General Public License version 3 or later; see LICENSE
+ *
+ * REST API controller for content snapshot operations.
+ *
+ * Endpoints:
+ *   GET    /api/index.php/v1/mokosuitebackup/snapshots              — List snapshots
+ *   POST   /api/index.php/v1/mokosuitebackup/snapshot               — Create snapshot
+ *   POST   /api/index.php/v1/mokosuitebackup/snapshot/:id/restore   — Restore snapshot
+ *   DELETE /api/index.php/v1/mokosuitebackup/snapshot/:id            — Delete snapshot
+ *   GET    /api/index.php/v1/mokosuitebackup/snapshot/:id/download   — Download snapshot JSON
+ */
+
+namespace Joomla\Component\MokoSuiteBackup\Api\Controller;
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\MVC\Controller\ApiController;
+use Joomla\Component\MokoSuiteBackup\Administrator\Engine\SnapshotEngine;
+use Joomla\Component\MokoSuiteBackup\Administrator\Engine\SnapshotRestoreEngine;
+
+class SnapshotsController extends ApiController
+{
+	protected $contentType = 'snapshots';
+	protected $default_view = 'snapshots';
+
+	/**
+	 * List all snapshots with pagination (GET /api/index.php/v1/mokosuitebackup/snapshots)
+	 */
+	public function displayList(): static
+	{
+		if (!$this->app->getIdentity()->authorise('core.manage', 'com_mokosuitebackup')) {
+			$this->app->setHeader('status', 403);
+			echo json_encode(['errors' => [['title' => 'Access denied']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		$db = Factory::getDbo();
+
+		$limit  = $this->input->getInt('limit', 20);
+		$offset = $this->input->getInt('offset', 0);
+
+		// Clamp limits
+		$limit = max(1, min($limit, 100));
+		$offset = max(0, $offset);
+
+		// Get total count
+		$countQuery = $db->getQuery(true)
+			->select('COUNT(*)')
+			->from($db->quoteName('#__mokosuitebackup_snapshots'));
+		$db->setQuery($countQuery);
+		$total = (int) $db->loadResult();
+
+		// Get paginated results
+		$query = $db->getQuery(true)
+			->select('*')
+			->from($db->quoteName('#__mokosuitebackup_snapshots'))
+			->order($db->quoteName('created') . ' DESC');
+		$db->setQuery($query, $offset, $limit);
+		$items = $db->loadObjectList() ?: [];
+
+		$data = [];
+
+		foreach ($items as $item) {
+			$data[] = [
+				'type'       => 'snapshots',
+				'id'         => $item->id,
+				'attributes' => $item,
+			];
+		}
+
+		$this->app->setHeader('status', 200);
+		echo json_encode([
+			'data' => $data,
+			'meta' => [
+				'total'  => $total,
+				'limit'  => $limit,
+				'offset' => $offset,
+			],
+		]);
+		$this->app->close();
+
+		return $this;
+	}
+
+	/**
+	 * Create a new content snapshot (POST /api/index.php/v1/mokosuitebackup/snapshot)
+	 */
+	public function create(): static
+	{
+		if (!$this->app->getIdentity()->authorise('mokosuitebackup.snapshot.manage', 'com_mokosuitebackup')) {
+			$this->app->setHeader('status', 403);
+			echo json_encode(['errors' => [['title' => 'Access denied']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		$data = json_decode($this->input->json->getRaw(), true) ?: [];
+
+		$contentTypes = $data['content_types'] ?? [];
+		$description  = $data['description'] ?? '';
+
+		if (empty($contentTypes) || !is_array($contentTypes)) {
+			$this->app->setHeader('status', 400);
+			echo json_encode(['errors' => [['title' => 'content_types array is required']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		$engine = new SnapshotEngine();
+		$result = $engine->create($contentTypes, $description);
+
+		if ($result['success']) {
+			$this->app->setHeader('status', 200);
+			echo json_encode(['data' => $result]);
+		} else {
+			$this->app->setHeader('status', 500);
+			echo json_encode(['errors' => [['title' => $result['message']]]]);
+		}
+
+		$this->app->close();
+
+		return $this;
+	}
+
+	/**
+	 * Restore from a snapshot (POST /api/index.php/v1/mokosuitebackup/snapshot/:id/restore)
+	 */
+	public function restore(): static
+	{
+		if (!$this->app->getIdentity()->authorise('mokosuitebackup.snapshot.manage', 'com_mokosuitebackup')) {
+			$this->app->setHeader('status', 403);
+			echo json_encode(['errors' => [['title' => 'Access denied']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		$id = $this->input->getInt('id', 0);
+
+		if (!$id) {
+			$this->app->setHeader('status', 400);
+			echo json_encode(['errors' => [['title' => 'Snapshot ID is required']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		$data = json_decode($this->input->json->getRaw(), true) ?: [];
+
+		$mode         = $data['mode'] ?? 'replace';
+		$contentTypes = $data['content_types'] ?? [];
+
+		// Enforce valid restore mode
+		if (!in_array($mode, ['replace', 'merge'], true)) {
+			$mode = 'replace';
+		}
+
+		$engine = new SnapshotRestoreEngine();
+		$result = $engine->restore($id, $mode, $contentTypes);
+
+		if ($result['success']) {
+			$this->app->setHeader('status', 200);
+			echo json_encode(['data' => $result]);
+		} else {
+			$this->app->setHeader('status', 500);
+			echo json_encode(['errors' => [['title' => $result['message']]]]);
+		}
+
+		$this->app->close();
+
+		return $this;
+	}
+
+	/**
+	 * Delete a snapshot record and its data file (DELETE /api/index.php/v1/mokosuitebackup/snapshot/:id)
+	 */
+	public function delete(): static
+	{
+		if (!$this->app->getIdentity()->authorise('mokosuitebackup.snapshot.manage', 'com_mokosuitebackup')) {
+			$this->app->setHeader('status', 403);
+			echo json_encode(['errors' => [['title' => 'Access denied']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		$id = $this->input->getInt('id', 0);
+
+		if (!$id) {
+			$this->app->setHeader('status', 400);
+			echo json_encode(['errors' => [['title' => 'Snapshot ID is required']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		$db = Factory::getDbo();
+
+		// Load record to get file path
+		$query = $db->getQuery(true)
+			->select('*')
+			->from($db->quoteName('#__mokosuitebackup_snapshots'))
+			->where($db->quoteName('id') . ' = ' . $id);
+		$db->setQuery($query);
+		$record = $db->loadObject();
+
+		if (!$record) {
+			$this->app->setHeader('status', 404);
+			echo json_encode(['errors' => [['title' => 'Snapshot not found']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		// Delete data file
+		if ($record->data_file && is_file($record->data_file)) {
+			if (!unlink($record->data_file)) {
+				error_log('MokoSuiteBackup: Failed to delete snapshot file: ' . $record->data_file);
+			}
+		}
+
+		// Delete record
+		$query = $db->getQuery(true)
+			->delete($db->quoteName('#__mokosuitebackup_snapshots'))
+			->where($db->quoteName('id') . ' = ' . $id);
+		$db->setQuery($query);
+		$db->execute();
+
+		$this->app->setHeader('status', 200);
+		echo json_encode(['data' => ['success' => true, 'message' => 'Snapshot deleted']]);
+		$this->app->close();
+
+		return $this;
+	}
+
+	/**
+	 * Stream the JSON snapshot file (GET /api/index.php/v1/mokosuitebackup/snapshot/:id/download)
+	 */
+	public function download(): static
+	{
+		if (!$this->app->getIdentity()->authorise('core.manage', 'com_mokosuitebackup')) {
+			$this->app->setHeader('status', 403);
+			echo json_encode(['errors' => [['title' => 'Access denied']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		$id = $this->input->getInt('id', 0);
+
+		if (!$id) {
+			$this->app->setHeader('status', 400);
+			echo json_encode(['errors' => [['title' => 'Snapshot ID is required']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		$db = Factory::getDbo();
+
+		$query = $db->getQuery(true)
+			->select('*')
+			->from($db->quoteName('#__mokosuitebackup_snapshots'))
+			->where($db->quoteName('id') . ' = ' . $id);
+		$db->setQuery($query);
+		$record = $db->loadObject();
+
+		if (!$record || !is_file($record->data_file) || !is_readable($record->data_file)) {
+			$this->app->setHeader('status', 404);
+			echo json_encode(['errors' => [['title' => 'Snapshot file not found']]]);
+			$this->app->close();
+
+			return $this;
+		}
+
+		// Stream as download
+		while (@ob_end_clean()) {
+			// clear all buffers
+		}
+
+		$filename = basename($record->data_file);
+		$filesize = filesize($record->data_file);
+
+		header('Content-Type: application/json');
+		header("Content-Disposition: attachment; filename*=UTF-8''" . rawurlencode($filename));
+		header('Content-Length: ' . $filesize);
+		header('Cache-Control: no-cache, must-revalidate');
+
+		readfile($record->data_file);
+
+		$this->app->close();
+
+		return $this;
+	}
+}

source/packages/plg_webservices_mokosuitebackup/src/Extension/MokoSuiteBackupWebServices.php

@@ -9,12 +9,19 @@
  *
  * REST API endpoints — wire-compatible with the mcp_mokosuitebackup MCP server.
  *
- * Akeeba-compatible routes:
- *   POST   /api/index.php/v1/mokosuitebackup/backup         — Start backup
- *   GET    /api/index.php/v1/mokosuitebackup/backups         — List records
- *   DELETE /api/index.php/v1/mokosuitebackup/backup/:id      — Delete record
- *   GET    /api/index.php/v1/mokosuitebackup/backup/:id/download — Download archive
- *   GET    /api/index.php/v1/mokosuitebackup/profiles        — List profiles
+ * Backup routes:
+ *   POST   /api/index.php/v1/mokosuitebackup/backup              — Start backup
+ *   GET    /api/index.php/v1/mokosuitebackup/backups              — List records
+ *   DELETE /api/index.php/v1/mokosuitebackup/backup/:id           — Delete record
+ *   GET    /api/index.php/v1/mokosuitebackup/backup/:id/download  — Download archive
+ *   GET    /api/index.php/v1/mokosuitebackup/profiles             — List profiles
+ *
+ * Snapshot routes:
+ *   GET    /api/index.php/v1/mokosuitebackup/snapshots              — List snapshots
+ *   POST   /api/index.php/v1/mokosuitebackup/snapshot               — Create snapshot
+ *   POST   /api/index.php/v1/mokosuitebackup/snapshot/:id/restore   — Restore snapshot
+ *   DELETE /api/index.php/v1/mokosuitebackup/snapshot/:id            — Delete snapshot
+ *   GET    /api/index.php/v1/mokosuitebackup/snapshot/:id/download   — Download snapshot JSON
  */
 
 namespace Joomla\Plugin\WebServices\MokoSuiteBackup\Extension;
@@ -94,5 +101,62 @@ final class MokoSuiteBackupWebServices extends CMSPlugin implements SubscriberIn
 				$defaults
 			)
 		);
+
+		// --- Snapshot routes ---
+
+		// List snapshots (GET)
+		$router->addRoute(
+			new Route(
+				['GET'],
+				'v1/mokosuitebackup/snapshots',
+				'snapshots.displayList',
+				[],
+				$defaults
+			)
+		);
+
+		// Create a snapshot (POST)
+		$router->addRoute(
+			new Route(
+				['POST'],
+				'v1/mokosuitebackup/snapshot',
+				'snapshots.create',
+				[],
+				$defaults
+			)
+		);
+
+		// Restore a snapshot (POST)
+		$router->addRoute(
+			new Route(
+				['POST'],
+				'v1/mokosuitebackup/snapshot/:id/restore',
+				'snapshots.restore',
+				['id' => '(\d+)'],
+				$defaults
+			)
+		);
+
+		// Delete a snapshot (DELETE)
+		$router->addRoute(
+			new Route(
+				['DELETE'],
+				'v1/mokosuitebackup/snapshot/:id',
+				'snapshots.delete',
+				['id' => '(\d+)'],
+				$defaults
+			)
+		);
+
+		// Download a snapshot JSON file (GET)
+		$router->addRoute(
+			new Route(
+				['GET'],
+				'v1/mokosuitebackup/snapshot/:id/download',
+				'snapshots.download',
+				['id' => '(\d+)'],
+				$defaults
+			)
+		);
 	}
 }