# Media Downloader Versioning & Backup Guide

## Version Management

### Current Version
The current version is stored in `/opt/media-downloader/VERSION`:
```
12.12.1
```

### Versioning Scheme
This project follows [Semantic Versioning](https://semver.org/) (SemVer):

**MAJOR.MINOR.PATCH** (e.g., 6.0.0)

- **MAJOR**: Incompatible API changes, major feature overhauls
- **MINOR**: New features, backward-compatible changes
- **PATCH**: Bug fixes, security patches, backward-compatible fixes

### Version History

See [CHANGELOG.md](../CHANGELOG.md) for complete version history.

**Recent Versions:**
- **v6.0.0** (2025-10-26) - Database CLI, ImgInn fixes, installer updates, version control
- **v5.0.0** (2025-10-25) - File hash deduplication, directory reorganization, documentation
- **v4.x** - Multi-platform support, scheduler, Immich integration

---

## Backup System Integration

### Backup Central Integration

Media Downloader is integrated with Backup Central for automated backups.

**Profile ID:** `profile-media-downloader`
**Schedule:** Daily at 00:00 (midnight)
**Destination:** `/media/backups/Ubuntu/restic-repo` (shared restic repository)

### Re-adding the Backup Profile

If you need to recreate the backup profile, run:

```bash
cd /opt/media-downloader
sudo ./scripts/add-backup-profile.sh
```

This script will:
1. Remove existing profile (if present)
2. Create new profile with correct settings
3. Restart Backup Central service
4. Verify profile was created

### What Gets Backed Up

**Included:**
- `/opt/media-downloader/config/` - All configuration files
- `/opt/media-downloader/database/` - SQLite databases (main + scheduler)
- `/opt/media-downloader/cookies/` - Authentication cookies
- `/opt/media-downloader/sessions/` - Instagram session files
- `/opt/media-downloader/modules/` - All Python modules
- `/opt/media-downloader/wrappers/` - Subprocess wrappers
- `/opt/media-downloader/utilities/` - Utility scripts
- `/opt/media-downloader/scripts/` - Backup and install scripts
- `/opt/media-downloader/*.py` - Main application files
- `/opt/media-downloader/VERSION` - Version file
- `/opt/media-downloader/CHANGELOG.md` - Change log
- `/opt/media-downloader/README.md` - Documentation
- `/opt/media-downloader/INSTALL.md` - Installation guide
- `/opt/media-downloader/requirements.txt` - Dependencies
- `/opt/media-downloader/db` - Database CLI wrapper

**Excluded:**
- `/opt/media-downloader/temp/` - Temporary downloads
- `/opt/media-downloader/logs/` - Log files
- `/opt/media-downloader/venv/` - Virtual environment (reproducible)
- `/opt/media-downloader/.playwright/` - Playwright cache (reproducible)
- `/opt/media-downloader/debug/` - Debug files
- `*.log`, `*.log.*` - All log files
- `*.pyc`, `__pycache__` - Python bytecode
- `*.db-shm`, `*.db-wal` - SQLite temporary files
- Swap files: `*.swp`, `*.swo`, `*~`

### Retention Policy

- **Daily:** 7 days
- **Weekly:** 4 weeks
- **Monthly:** 12 months
- **Yearly:** 2 years

### Notifications

- **Success:** Disabled (runs daily, would spam)
- **Warning:** Enabled (Pushover)
- **Failure:** Enabled (Pushover)

---

## Creating Version Backups

### Manual Version Backup

To create a version-stamped locked backup:

```bash
cd /opt/media-downloader
./scripts/create-version-backup.sh
```

This will:
1. Read version from `VERSION` file
2. Create timestamp
3. Generate backup name: `{version}-{timestamp}`
4. Run backup using Backup Central
5. Lock the backup (prevent deletion)

**Example backup name:**
```
6.0.0-20251026-143000
```

This matches backup-central's naming convention: `{version}-{YYYYMMDD-HHMMSS}`

### When to Create Version Backups

Create manual version backups:
- **Before releasing a new version** - Capture stable state
- **After major changes** - Database schema, config structure
- **Before risky operations** - Large refactors, dependency updates
- **Milestone achievements** - Feature completions, bug fixes

### Scheduled Backups

Daily backups run automatically:
- **Time:** 00:00 (midnight)
- **Managed by:** Backup Central scheduler
- **Type:** Incremental (restic)
- **Not locked** - Subject to retention policy

---

## Backup Management

### List All Backups

```bash
backup-central list -P profile-media-downloader
```

### View Profile Details

```bash
backup-central profiles --info profile-media-downloader
```

### Manual Backup

```bash
backup-central backup -P profile-media-downloader
```

### Create Custom Named Backup

```bash
backup-central backup -P profile-media-downloader -n "before-upgrade" -l
```

### Restore from Backup

```bash
# List snapshots
backup-central list -P profile-media-downloader

# Restore specific snapshot
backup-central restore <snapshot-id> -P profile-media-downloader -t /opt/media-downloader-restore
```

### Lock/Unlock Backups

```bash
# Lock important backups (prevent deletion)
backup-central lock <backup-id>

# Unlock backups
backup-central unlock <backup-id>
```

---

## Version Release Process

### 1. Update Code & Test
- Make changes
- Test thoroughly
- Verify all platforms work
- Check database operations

### 2. Update Version
```bash
# Edit VERSION file
echo "6.1.0" > /opt/media-downloader/VERSION
```

### 3. Update CHANGELOG
- Document all changes in `CHANGELOG.md`
- Follow existing format
- Include:
  - New features
  - Bug fixes
  - Breaking changes
  - Upgrade notes

### 4. Create Version Backup
```bash
./scripts/create-version-backup.sh
```

### 5. Tag & Commit (if using git)
```bash
git add VERSION CHANGELOG.md
git commit -m "Release v6.1.0"
git tag -a v6.1.0 -m "Version 6.1.0 release"
git push && git push --tags
```

### 6. Verify Backup
```bash
backup-central list -P profile-media-downloader --limit 5
```

---

## Disaster Recovery

### Full System Restore

1. **Install base system**
   ```bash
   sudo mkdir -p /opt/media-downloader
   ```

2. **Restore from backup**
   ```bash
   backup-central restore <snapshot-id> -P profile-media-downloader -t /opt
   ```

3. **Reinstall dependencies**
   ```bash
   cd /opt/media-downloader
   python3 -m venv venv
   source venv/bin/activate
   pip install -r requirements.txt
   playwright install chromium
   ```

4. **Set permissions**
   ```bash
   sudo chown -R $USER:$USER /opt/media-downloader
   chmod +x /opt/media-downloader/media-downloader.py
   chmod +x /opt/media-downloader/db
   chmod +x /opt/media-downloader/scripts/*.sh
   ```

5. **Verify**
   ```bash
   /opt/media-downloader/media-downloader.py --version
   ./db stats
   ```

### Partial Restore (Config Only)

```bash
# Restore just config directory
backup-central restore <snapshot-id> \
  -P profile-media-downloader \
  -i "/opt/media-downloader/config" \
  -t /tmp/restore

# Copy to production
sudo cp -r /tmp/restore/opt/media-downloader/config/* /opt/media-downloader/config/
```

### Database Restore

```bash
# Restore just database
backup-central restore <snapshot-id> \
  -P profile-media-downloader \
  -i "/opt/media-downloader/database" \
  -t /tmp/restore

# Stop scheduler
sudo systemctl stop media-downloader

# Replace database
sudo cp /tmp/restore/opt/media-downloader/database/*.db /opt/media-downloader/database/

# Restart
sudo systemctl start media-downloader
```

---

## Backup Verification

### Verify Backup Integrity

```bash
# Check backup profile health
backup-central health

# Verify specific profile
backup-central profiles --stats profile-media-downloader
```

### Test Restore

Periodically test restores to ensure backups are usable:

```bash
# 1. Create test restore directory
mkdir -p /tmp/media-downloader-test-restore

# 2. Restore to test location
backup-central restore latest -P profile-media-downloader -t /tmp/media-downloader-test-restore

# 3. Verify critical files exist
ls -la /tmp/media-downloader-test-restore/opt/media-downloader/config/
ls -la /tmp/media-downloader-test-restore/opt/media-downloader/database/

# 4. Check database integrity
sqlite3 /tmp/media-downloader-test-restore/opt/media-downloader/database/media_downloader.db "PRAGMA integrity_check;"

# 5. Clean up
rm -rf /tmp/media-downloader-test-restore
```

---

## Troubleshooting

### Backup Fails

**Check destination:**
```bash
ls -la /media/backups/Ubuntu/restic-repo
```

**Check logs:**
```bash
backup-central list -P profile-media-downloader
sudo journalctl -u backup-central -f
```

**Manual test:**
```bash
backup-central backup -P profile-media-downloader --dry-run
```

### Version Script Fails

**Check VERSION file:**
```bash
cat /opt/media-downloader/VERSION
```

**Verify profile exists:**
```bash
backup-central profiles list | grep media-downloader
```

**Test backup manually:**
```bash
backup-central backup -P profile-media-downloader -n "test-backup"
```

---

## Best Practices

### Version Management
- ✅ Update VERSION file before creating version backup
- ✅ Always update CHANGELOG.md with version
- ✅ Use semantic versioning (MAJOR.MINOR.PATCH)
- ✅ Lock important release backups
- ✅ Tag releases in git (if using version control)

### Backup Strategy
- ✅ Create version backup before major changes
- ✅ Test restores quarterly
- ✅ Verify backup notifications work
- ✅ Monitor backup sizes (check for bloat)
- ✅ Keep locked backups for major versions
- ✅ Document any custom backup procedures

### Security
- ✅ Backups include credentials (cookies, sessions, config)
- ✅ Ensure backup destination is secure
- ✅ Restrict access to backup restoration
- ✅ Consider encryption for sensitive data
- ✅ Don't commit credentials to git

---

## See Also

- [CHANGELOG.md](../CHANGELOG.md) - Full version history
- [README.md](../README.md) - Main documentation
- [INSTALL.md](../INSTALL.md) - Installation guide
- [Backup Central Documentation](https://bu.lic.ad/docs)