### Minimal NEPacketTunnelProvider Setup

Source: https://github.com/dima-u/swiftyxraykit/blob/main/README.md

Implement a basic NEPacketTunnelProvider to integrate SwiftyXrayKit for running Xray-core. Ensure network settings are applied before starting the Xray bridge.

```swift
import NetworkExtension
import SwiftyXrayKit

class PacketTunnelProvider: NEPacketTunnelProvider {

    var bridge: XrayBridge?

    override func startTunnel(options: [String: NSObject]?, completionHandler: @escaping (Error?) -> Void) {
        setTunnelNetworkSettings(makeNetworkSettings()) { [weak self] error in
            guard let self, error == nil else { completionHandler(error); return }
            do {
                try self.startXray()
                completionHandler(nil)
            } catch {
                completionHandler(error)
            }
        }
    }

    private func startXray() throws {
        let config = try String(contentsOf: configFileURL, encoding: .utf8)
        let bridge = XrayBridge(packetFlow: packetFlow)
        try bridge.start(
            config: .json(config),
            dataDir: geoDataDir,
            finalConfigPath: finalConfigURL
        )
        self.bridge = bridge
    }

    override func stopTunnel(with reason: NEProviderStopReason, completionHandler: @escaping () -> Void) {
        bridge?.stop()
        bridge = nil
        completionHandler()
    }
}
```

--------------------------------

### Start Xray with Share Link Input

Source: https://github.com/dima-u/swiftyxraykit/blob/main/README.md

Initiate the Xray bridge using a VMess, VLESS, or other share link. The kit automatically converts the link into a JSON configuration.

```swift
try bridge.start(config: .url("vless://..."), dataDir: geoDir, finalConfigPath: finalPath)
```

--------------------------------

### Swift Package Manager Installation

Source: https://github.com/dima-u/swiftyxraykit/blob/main/README.md

Add SwiftyXrayKit to your project's dependencies using Swift Package Manager.

```swift
dependencies: [
    .package(url: "https://github.com/dima-u/SwiftyXrayKit.git", from: "1.1.0")
]
```

--------------------------------

### Run with Raw Configuration File

Source: https://github.com/dima-u/swiftyxraykit/blob/main/README.md

Bypass all SwiftyXrayKit patching and directly run Xray using a pre-built JSON configuration file. This is useful for complete control over the Xray setup.

```swift
try bridge.startWithRawConfig(rawConfigPath: myConfigURL, dataDir: geoDir)
```

--------------------------------

### Get and Clear Transfer Statistics

Source: https://github.com/dima-u/swiftyxraykit/blob/main/README.md

Retrieve and reset the sent and received byte statistics for the Xray bridge. Call this method periodically to monitor data transfer.

```swift
// Call periodically to get stats since last call
let stats = bridge.getAndClearStats()
print("↑ \(stats.sent) ↓ \(stats.received)")
```

--------------------------------

### Intercept and Transform Config

Source: https://github.com/dima-u/swiftyxraykit/blob/main/README.md

Utilize the `configTransform` closure to intercept and modify the generated Xray configuration dictionary before it's used to start Xray. This allows for dynamic adjustments like setting log levels or DNS servers.

```swift
try bridge.start(config: .json(config), dataDir: geoDir, finalConfigPath: finalPath,
                 configTransform: { config in
                     var c = config
                     c["log"] = ["loglevel": "warning"]
                     c["dns"] = ["servers": ["1.1.1.1", "8.8.8.8"]]
                     return c
                 })
```

--------------------------------

### Apply Tuning Presets

Source: https://github.com/dima-u/swiftyxraykit/blob/main/README.md

Use predefined tuning presets like `.mobile` or `.desktop` for optimized performance. The `.default` preset adapts based on the operating system.

```swift
try bridge.start(config: .json(config), dataDir: geoDir, finalConfigPath: finalPath,
                 preset: .mobile)
```

--------------------------------

### Download GeoIP and GeoSite Files

Source: https://github.com/dima-u/swiftyxraykit/blob/main/README.md

Download the necessary `geoip.dat` and `geosite.dat` files using `GeoFilesLoader`. The download process provides progress tracking.

```swift
let loader = GeoFilesLoader()
try await loader.download(to: geoDataDir) { progress in
    print("Downloading: \(Int(progress * 100))%")
}
```

--------------------------------

### Customize Tuning Presets

Source: https://github.com/dima-u/swiftyxraykit/blob/main/README.md

Modify individual parameters of a tuning preset, such as `memoryLimitMB` or `tcpMaxInFlight`, to fine-tune Xray's behavior.

```swift
var preset = XrayTuningPreset.mobile
preset.memoryLimitMB = 40
preset.tcpMaxInFlight = 256
try bridge.start(config: .json(config), dataDir: geoDir, finalConfigPath: finalPath,
                 preset: preset)
```

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