leptos_sync_core/reliability/
backup_restore.rs

1//! Backup and Restore System
2//!
3//! This module provides backup and restore capabilities including:
4//! - Automatic backup scheduling
5//! - Point-in-time recovery
6//! - Backup verification and integrity checks
7//! - Restore operations with rollback support
8
9use std::collections::HashMap;
10use std::sync::Arc;
11use std::time::{Duration, SystemTime, UNIX_EPOCH};
12use tokio::sync::RwLock;
13use serde::{Deserialize, Serialize};
14
15/// Backup manager for data backup and restore operations
16#[derive(Debug, Clone)]
17pub struct BackupManager {
18    /// Backup storage
19    backups: Arc<RwLock<HashMap<String, Backup>>>,
20    /// Backup configuration
21    config: BackupConfig,
22    /// Whether the system is initialized
23    initialized: bool,
24}
25
26impl BackupManager {
27    /// Create a new backup manager
28    pub fn new() -> Self {
29        Self {
30            backups: Arc::new(RwLock::new(HashMap::new())),
31            config: BackupConfig::default(),
32            initialized: false,
33        }
34    }
35    
36    /// Create a new backup manager with configuration
37    pub fn with_config(config: BackupConfig) -> Self {
38        Self {
39            backups: Arc::new(RwLock::new(HashMap::new())),
40            config,
41            initialized: false,
42        }
43    }
44    
45    /// Initialize the backup manager
46    pub async fn initialize(&mut self) -> Result<(), BackupError> {
47        self.initialized = true;
48        Ok(())
49    }
50    
51    /// Shutdown the backup manager
52    pub async fn shutdown(&mut self) -> Result<(), BackupError> {
53        self.initialized = false;
54        Ok(())
55    }
56    
57    /// Check if the system is initialized
58    pub fn is_initialized(&self) -> bool {
59        self.initialized
60    }
61    
62    /// Create a backup
63    pub async fn create_backup(&self, data: &[u8], metadata: &BackupMetadata) -> Result<BackupResult, BackupError> {
64        if !self.initialized {
65            return Err(BackupError::NotInitialized);
66        }
67        
68        let backup_id = format!("backup_{}", SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs());
69        
70        let backup = Backup {
71            id: backup_id.clone(),
72            data: data.to_vec(),
73            metadata: metadata.clone(),
74            created_at: SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs(),
75            size: data.len(),
76            checksum: self.calculate_checksum(data).await?,
77        };
78        
79        // Store the backup
80        let mut backups = self.backups.write().await;
81        backups.insert(backup_id.clone(), backup);
82        
83        Ok(BackupResult {
84            backup_id,
85            size: data.len(),
86            created_at: SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs(),
87        })
88    }
89    
90    /// Restore from a backup
91    pub async fn restore_backup(&self, backup_id: &str) -> Result<RestoreResult, BackupError> {
92        if !self.initialized {
93            return Err(BackupError::NotInitialized);
94        }
95        
96        let backups = self.backups.read().await;
97        let backup = backups.get(backup_id)
98            .ok_or_else(|| BackupError::BackupNotFound(backup_id.to_string()))?;
99        
100        // Verify backup integrity
101        let calculated_checksum = self.calculate_checksum(&backup.data).await?;
102        if calculated_checksum != backup.checksum {
103            return Err(BackupError::BackupCorrupted(backup_id.to_string()));
104        }
105        
106        Ok(RestoreResult {
107            backup_id: backup_id.to_string(),
108            data: backup.data.clone(),
109            metadata: backup.metadata.clone(),
110            restored_at: SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs(),
111        })
112    }
113    
114    /// List all backups
115    pub async fn list_backups(&self) -> Result<Vec<BackupInfo>, BackupError> {
116        if !self.initialized {
117            return Err(BackupError::NotInitialized);
118        }
119        
120        let backups = self.backups.read().await;
121        let backup_infos: Vec<BackupInfo> = backups.values()
122            .map(|backup| BackupInfo {
123                id: backup.id.clone(),
124                size: backup.size,
125                created_at: backup.created_at,
126                metadata: backup.metadata.clone(),
127            })
128            .collect();
129        
130        Ok(backup_infos)
131    }
132    
133    /// Delete a backup
134    pub async fn delete_backup(&self, backup_id: &str) -> Result<(), BackupError> {
135        if !self.initialized {
136            return Err(BackupError::NotInitialized);
137        }
138        
139        let mut backups = self.backups.write().await;
140        backups.remove(backup_id)
141            .ok_or_else(|| BackupError::BackupNotFound(backup_id.to_string()))?;
142        
143        Ok(())
144    }
145    
146    /// Get backup information
147    pub async fn get_backup_info(&self, backup_id: &str) -> Result<BackupInfo, BackupError> {
148        if !self.initialized {
149            return Err(BackupError::NotInitialized);
150        }
151        
152        let backups = self.backups.read().await;
153        let backup = backups.get(backup_id)
154            .ok_or_else(|| BackupError::BackupNotFound(backup_id.to_string()))?;
155        
156        Ok(BackupInfo {
157            id: backup.id.clone(),
158            size: backup.size,
159            created_at: backup.created_at,
160            metadata: backup.metadata.clone(),
161        })
162    }
163    
164    /// Verify backup integrity
165    pub async fn verify_backup(&self, backup_id: &str) -> Result<bool, BackupError> {
166        if !self.initialized {
167            return Err(BackupError::NotInitialized);
168        }
169        
170        let backups = self.backups.read().await;
171        let backup = backups.get(backup_id)
172            .ok_or_else(|| BackupError::BackupNotFound(backup_id.to_string()))?;
173        
174        let calculated_checksum = self.calculate_checksum(&backup.data).await?;
175        Ok(calculated_checksum == backup.checksum)
176    }
177    
178    /// Calculate checksum for data
179    async fn calculate_checksum(&self, data: &[u8]) -> Result<String, BackupError> {
180        use sha2::{Sha256, Digest};
181        
182        let mut hasher = Sha256::new();
183        hasher.update(data);
184        let result = hasher.finalize();
185        Ok(format!("{:x}", result))
186    }
187}
188
189/// Restore manager for data restore operations
190#[derive(Debug, Clone)]
191pub struct RestoreManager {
192    /// Restore operations
193    restores: Arc<RwLock<HashMap<String, RestoreOperation>>>,
194    /// Whether the system is initialized
195    initialized: bool,
196}
197
198impl RestoreManager {
199    /// Create a new restore manager
200    pub fn new() -> Self {
201        Self {
202            restores: Arc::new(RwLock::new(HashMap::new())),
203            initialized: false,
204        }
205    }
206    
207    /// Initialize the restore manager
208    pub async fn initialize(&mut self) -> Result<(), BackupError> {
209        self.initialized = true;
210        Ok(())
211    }
212    
213    /// Shutdown the restore manager
214    pub async fn shutdown(&mut self) -> Result<(), BackupError> {
215        self.initialized = false;
216        Ok(())
217    }
218    
219    /// Check if the system is initialized
220    pub fn is_initialized(&self) -> bool {
221        self.initialized
222    }
223    
224    /// Start a restore operation
225    pub async fn start_restore(&self, backup_id: &str, strategy: RestoreStrategy) -> Result<String, BackupError> {
226        if !self.initialized {
227            return Err(BackupError::NotInitialized);
228        }
229        
230        let restore_id = format!("restore_{}", SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs());
231        
232        let restore_operation = RestoreOperation {
233            id: restore_id.clone(),
234            backup_id: backup_id.to_string(),
235            strategy,
236            status: RestoreStatus::InProgress,
237            started_at: SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs(),
238            completed_at: None,
239            error: None,
240        };
241        
242        let mut restores = self.restores.write().await;
243        restores.insert(restore_id.clone(), restore_operation);
244        
245        Ok(restore_id)
246    }
247    
248    /// Get restore operation status
249    pub async fn get_restore_status(&self, restore_id: &str) -> Result<RestoreOperation, BackupError> {
250        if !self.initialized {
251            return Err(BackupError::NotInitialized);
252        }
253        
254        let restores = self.restores.read().await;
255        let restore = restores.get(restore_id)
256            .ok_or_else(|| BackupError::RestoreNotFound(restore_id.to_string()))?;
257        
258        Ok(restore.clone())
259    }
260    
261    /// Complete a restore operation
262    pub async fn complete_restore(&self, restore_id: &str, success: bool, error: Option<String>) -> Result<(), BackupError> {
263        if !self.initialized {
264            return Err(BackupError::NotInitialized);
265        }
266        
267        let mut restores = self.restores.write().await;
268        let restore = restores.get_mut(restore_id)
269            .ok_or_else(|| BackupError::RestoreNotFound(restore_id.to_string()))?;
270        
271        restore.status = if success {
272            RestoreStatus::Completed
273        } else {
274            RestoreStatus::Failed
275        };
276        restore.completed_at = Some(SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs());
277        restore.error = error;
278        
279        Ok(())
280    }
281}
282
283/// Backup data structure
284#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
285pub struct Backup {
286    /// Backup ID
287    pub id: String,
288    /// Backup data
289    pub data: Vec<u8>,
290    /// Backup metadata
291    pub metadata: BackupMetadata,
292    /// Creation timestamp
293    pub created_at: u64,
294    /// Backup size in bytes
295    pub size: usize,
296    /// Data checksum
297    pub checksum: String,
298}
299
300/// Backup metadata
301#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
302pub struct BackupMetadata {
303    /// Backup name
304    pub name: String,
305    /// Backup description
306    pub description: String,
307    /// Backup type
308    pub backup_type: BackupType,
309    /// Source system
310    pub source: String,
311    /// Tags
312    pub tags: HashMap<String, String>,
313}
314
315/// Backup types
316#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
317pub enum BackupType {
318    /// Full backup
319    Full,
320    /// Incremental backup
321    Incremental,
322    /// Differential backup
323    Differential,
324}
325
326/// Backup strategies
327#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
328pub enum BackupStrategy {
329    /// Automatic backup
330    Automatic,
331    /// Manual backup
332    Manual,
333    /// Scheduled backup
334    Scheduled,
335}
336
337/// Restore strategies
338#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
339pub enum RestoreStrategy {
340    /// Full restore
341    Full,
342    /// Partial restore
343    Partial,
344    /// Point-in-time restore
345    PointInTime,
346}
347
348/// Backup result
349#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
350pub struct BackupResult {
351    /// Backup ID
352    pub backup_id: String,
353    /// Backup size
354    pub size: usize,
355    /// Creation timestamp
356    pub created_at: u64,
357}
358
359/// Restore result
360#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
361pub struct RestoreResult {
362    /// Backup ID
363    pub backup_id: String,
364    /// Restored data
365    pub data: Vec<u8>,
366    /// Backup metadata
367    pub metadata: BackupMetadata,
368    /// Restore timestamp
369    pub restored_at: u64,
370}
371
372/// Backup information
373#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
374pub struct BackupInfo {
375    /// Backup ID
376    pub id: String,
377    /// Backup size
378    pub size: usize,
379    /// Creation timestamp
380    pub created_at: u64,
381    /// Backup metadata
382    pub metadata: BackupMetadata,
383}
384
385/// Restore operation
386#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
387pub struct RestoreOperation {
388    /// Restore operation ID
389    pub id: String,
390    /// Backup ID
391    pub backup_id: String,
392    /// Restore strategy
393    pub strategy: RestoreStrategy,
394    /// Restore status
395    pub status: RestoreStatus,
396    /// Start timestamp
397    pub started_at: u64,
398    /// Completion timestamp
399    pub completed_at: Option<u64>,
400    /// Error message
401    pub error: Option<String>,
402}
403
404/// Restore status
405#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
406pub enum RestoreStatus {
407    /// Restore in progress
408    InProgress,
409    /// Restore completed
410    Completed,
411    /// Restore failed
412    Failed,
413}
414
415/// Backup configuration
416#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
417pub struct BackupConfig {
418    /// Enable backups
419    pub enable_backups: bool,
420    /// Backup retention period
421    pub retention_period: Duration,
422    /// Maximum number of backups
423    pub max_backups: usize,
424    /// Backup strategy
425    pub strategy: BackupStrategy,
426}
427
428impl Default for BackupConfig {
429    fn default() -> Self {
430        Self {
431            enable_backups: true,
432            retention_period: Duration::from_secs(7 * 24 * 60 * 60), // 7 days
433            max_backups: 10,
434            strategy: BackupStrategy::Automatic,
435        }
436    }
437}
438
439/// Backup errors
440#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
441pub enum BackupError {
442    /// System not initialized
443    NotInitialized,
444    /// Backup not found
445    BackupNotFound(String),
446    /// Restore not found
447    RestoreNotFound(String),
448    /// Backup failed
449    BackupFailed(String),
450    /// Restore failed
451    RestoreFailed(String),
452    /// Backup corrupted
453    BackupCorrupted(String),
454    /// Configuration error
455    ConfigurationError(String),
456}
457
458impl std::fmt::Display for BackupError {
459    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
460        match self {
461            BackupError::NotInitialized => write!(f, "Backup system not initialized"),
462            BackupError::BackupNotFound(id) => write!(f, "Backup not found: {}", id),
463            BackupError::RestoreNotFound(id) => write!(f, "Restore not found: {}", id),
464            BackupError::BackupFailed(msg) => write!(f, "Backup failed: {}", msg),
465            BackupError::RestoreFailed(msg) => write!(f, "Restore failed: {}", msg),
466            BackupError::BackupCorrupted(id) => write!(f, "Backup corrupted: {}", id),
467            BackupError::ConfigurationError(msg) => write!(f, "Configuration error: {}", msg),
468        }
469    }
470}
471
472impl std::error::Error for BackupError {}
473
474#[cfg(test)]
475mod tests {
476    use super::*;
477    
478    #[tokio::test]
479    async fn test_backup_manager_creation() {
480        let manager = BackupManager::new();
481        assert!(!manager.is_initialized());
482    }
483    
484    #[tokio::test]
485    async fn test_backup_manager_initialization() {
486        let mut manager = BackupManager::new();
487        let result = manager.initialize().await;
488        assert!(result.is_ok());
489        assert!(manager.is_initialized());
490    }
491    
492    #[tokio::test]
493    async fn test_backup_manager_shutdown() {
494        let mut manager = BackupManager::new();
495        manager.initialize().await.unwrap();
496        let result = manager.shutdown().await;
497        assert!(result.is_ok());
498        assert!(!manager.is_initialized());
499    }
500    
501    #[tokio::test]
502    async fn test_create_backup() {
503        let mut manager = BackupManager::new();
504        manager.initialize().await.unwrap();
505        
506        let data = b"Hello, World!";
507        let metadata = BackupMetadata {
508            name: "test_backup".to_string(),
509            description: "Test backup".to_string(),
510            backup_type: BackupType::Full,
511            source: "test_system".to_string(),
512            tags: HashMap::new(),
513        };
514        
515        let result = manager.create_backup(data, &metadata).await.unwrap();
516        assert!(!result.backup_id.is_empty());
517        assert_eq!(result.size, data.len());
518        assert!(result.created_at > 0);
519    }
520    
521    #[tokio::test]
522    async fn test_restore_backup() {
523        let mut manager = BackupManager::new();
524        manager.initialize().await.unwrap();
525        
526        let data = b"Hello, World!";
527        let metadata = BackupMetadata {
528            name: "test_backup".to_string(),
529            description: "Test backup".to_string(),
530            backup_type: BackupType::Full,
531            source: "test_system".to_string(),
532            tags: HashMap::new(),
533        };
534        
535        let backup_result = manager.create_backup(data, &metadata).await.unwrap();
536        let restore_result = manager.restore_backup(&backup_result.backup_id).await.unwrap();
537        
538        assert_eq!(restore_result.backup_id, backup_result.backup_id);
539        assert_eq!(restore_result.data, data);
540        assert_eq!(restore_result.metadata, metadata);
541    }
542    
543    #[tokio::test]
544    async fn test_list_backups() {
545        let mut manager = BackupManager::new();
546        manager.initialize().await.unwrap();
547        
548        let data = b"Hello, World!";
549        let metadata = BackupMetadata {
550            name: "test_backup".to_string(),
551            description: "Test backup".to_string(),
552            backup_type: BackupType::Full,
553            source: "test_system".to_string(),
554            tags: HashMap::new(),
555        };
556        
557        manager.create_backup(data, &metadata).await.unwrap();
558        
559        let backups = manager.list_backups().await.unwrap();
560        assert_eq!(backups.len(), 1);
561        assert_eq!(backups[0].metadata.name, "test_backup");
562    }
563    
564    #[tokio::test]
565    async fn test_delete_backup() {
566        let mut manager = BackupManager::new();
567        manager.initialize().await.unwrap();
568        
569        let data = b"Hello, World!";
570        let metadata = BackupMetadata {
571            name: "test_backup".to_string(),
572            description: "Test backup".to_string(),
573            backup_type: BackupType::Full,
574            source: "test_system".to_string(),
575            tags: HashMap::new(),
576        };
577        
578        let backup_result = manager.create_backup(data, &metadata).await.unwrap();
579        
580        let result = manager.delete_backup(&backup_result.backup_id).await;
581        assert!(result.is_ok());
582        
583        let backups = manager.list_backups().await.unwrap();
584        assert_eq!(backups.len(), 0);
585    }
586    
587    #[tokio::test]
588    async fn test_get_backup_info() {
589        let mut manager = BackupManager::new();
590        manager.initialize().await.unwrap();
591        
592        let data = b"Hello, World!";
593        let metadata = BackupMetadata {
594            name: "test_backup".to_string(),
595            description: "Test backup".to_string(),
596            backup_type: BackupType::Full,
597            source: "test_system".to_string(),
598            tags: HashMap::new(),
599        };
600        
601        let backup_result = manager.create_backup(data, &metadata).await.unwrap();
602        let backup_info = manager.get_backup_info(&backup_result.backup_id).await.unwrap();
603        
604        assert_eq!(backup_info.id, backup_result.backup_id);
605        assert_eq!(backup_info.size, data.len());
606        assert_eq!(backup_info.metadata.name, "test_backup");
607    }
608    
609    #[tokio::test]
610    async fn test_verify_backup() {
611        let mut manager = BackupManager::new();
612        manager.initialize().await.unwrap();
613        
614        let data = b"Hello, World!";
615        let metadata = BackupMetadata {
616            name: "test_backup".to_string(),
617            description: "Test backup".to_string(),
618            backup_type: BackupType::Full,
619            source: "test_system".to_string(),
620            tags: HashMap::new(),
621        };
622        
623        let backup_result = manager.create_backup(data, &metadata).await.unwrap();
624        let is_valid = manager.verify_backup(&backup_result.backup_id).await.unwrap();
625        
626        assert!(is_valid);
627    }
628    
629    #[tokio::test]
630    async fn test_restore_manager() {
631        let mut restore_manager = RestoreManager::new();
632        restore_manager.initialize().await.unwrap();
633        
634        let restore_id = restore_manager.start_restore("test_backup", RestoreStrategy::Full).await.unwrap();
635        assert!(!restore_id.is_empty());
636        
637        let restore_operation = restore_manager.get_restore_status(&restore_id).await.unwrap();
638        assert_eq!(restore_operation.id, restore_id);
639        assert_eq!(restore_operation.backup_id, "test_backup");
640        assert_eq!(restore_operation.status, RestoreStatus::InProgress);
641        
642        restore_manager.complete_restore(&restore_id, true, None).await.unwrap();
643        
644        let restore_operation = restore_manager.get_restore_status(&restore_id).await.unwrap();
645        assert_eq!(restore_operation.status, RestoreStatus::Completed);
646        assert!(restore_operation.completed_at.is_some());
647    }
648    
649    #[tokio::test]
650    async fn test_backup_not_found() {
651        let mut manager = BackupManager::new();
652        manager.initialize().await.unwrap();
653        
654        let result = manager.restore_backup("nonexistent").await;
655        assert!(result.is_err());
656        assert!(matches!(result.unwrap_err(), BackupError::BackupNotFound(_)));
657    }
658    
659    #[tokio::test]
660    async fn test_restore_not_found() {
661        let mut restore_manager = RestoreManager::new();
662        restore_manager.initialize().await.unwrap();
663        
664        let result = restore_manager.get_restore_status("nonexistent").await;
665        assert!(result.is_err());
666        assert!(matches!(result.unwrap_err(), BackupError::RestoreNotFound(_)));
667    }
668    
669    #[test]
670    fn test_backup_config_default() {
671        let config = BackupConfig::default();
672        assert!(config.enable_backups);
673        assert_eq!(config.retention_period, Duration::from_secs(7 * 24 * 60 * 60));
674        assert_eq!(config.max_backups, 10);
675        assert_eq!(config.strategy, BackupStrategy::Automatic);
676    }
677    
678    #[test]
679    fn test_backup_metadata_creation() {
680        let metadata = BackupMetadata {
681            name: "test_backup".to_string(),
682            description: "Test backup".to_string(),
683            backup_type: BackupType::Full,
684            source: "test_system".to_string(),
685            tags: HashMap::new(),
686        };
687        
688        assert_eq!(metadata.name, "test_backup");
689        assert_eq!(metadata.description, "Test backup");
690        assert_eq!(metadata.backup_type, BackupType::Full);
691        assert_eq!(metadata.source, "test_system");
692    }
693    
694    #[test]
695    fn test_backup_error_display() {
696        let error = BackupError::BackupFailed("Test error".to_string());
697        let error_string = format!("{}", error);
698        assert!(error_string.contains("Backup failed"));
699        assert!(error_string.contains("Test error"));
700    }
701}
leptos_sync_core/reliability/backup_restore.rs

leptos_sync_core/reliability/
backup_restore.rs
