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Merge pull request #59 from buhe/getlocation
Tool of get location
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|  | ||
| # 🐇 LangChain Swift | ||
| # 🐇 Langchain Swift | ||
| [](https://github.com/buhe/langchain-swift/actions/workflows/swift.yml) [](https://opensource.org/licenses/Apache-2.0)  [](http://twitter.com/buhe1986) | ||
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| 🚀 A langchain copy, for ios or macOS apps. | ||
| 🚀 A Langchain copy, for iOS or macOS apps. | ||
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| ## Setup | ||
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| // | ||
| // File.swift | ||
| // | ||
| // | ||
| // Created by 顾艳华 on 2023/11/7. | ||
| // | ||
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| import Foundation | ||
| import CoreLocation | ||
| // !! Add "Privacy - Location When In Use Usage Description" to Info.plist | ||
| public class GetLocationTool: BaseTool, CLLocationManagerDelegate { | ||
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| let locationManager:CLLocationManager = CLLocationManager() | ||
| var authorizationStatus: CLAuthorizationStatus? | ||
| private var locationContinuation: CheckedContinuation<String, Error>? | ||
| public override init(callbacks: [BaseCallbackHandler] = []) { | ||
| super.init(callbacks: callbacks) | ||
| // callback locationManagerDidChangeAuthorization | ||
| locationManager.delegate = self | ||
| } | ||
| public override func name() -> String { | ||
| "GetLocation" | ||
| } | ||
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| public override func description() -> String { | ||
| """ | ||
| Tool of get current location. | ||
| Input must be here. | ||
| Returns the current longitude and latitude, such as -78.4:38.5. | ||
| """ | ||
| } | ||
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| public override func _run(args: String) async throws -> String { | ||
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| locationManager.requestLocation() | ||
| //wait | ||
| return try await withCheckedThrowingContinuation { continuation in | ||
| locationContinuation = continuation | ||
| } | ||
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| } | ||
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| public func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { | ||
| let currLocation:CLLocation = locations.last! | ||
| let longitude = currLocation.coordinate.longitude | ||
| let latitude = currLocation.coordinate.latitude | ||
| // signal | ||
| locationContinuation?.resume(returning: "\(longitude):\(latitude)") | ||
| } | ||
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| public func locationManagerDidChangeAuthorization(_ manager: CLLocationManager) { | ||
| switch manager.authorizationStatus { | ||
| case .authorizedWhenInUse: // Location services are available. | ||
| // Insert code here of what should happen when Location services are authorized | ||
| // authorizationStatus = .authorizedWhenInUse | ||
| // locationManager.requestLocation() | ||
| break | ||
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| case .restricted: // Location services currently unavailable. | ||
| // Insert code here of what should happen when Location services are NOT authorized | ||
| authorizationStatus = .restricted | ||
| break | ||
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| case .denied: // Location services currently unavailable. | ||
| // Insert code here of what should happen when Location services are NOT authorized | ||
| authorizationStatus = .denied | ||
| break | ||
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| case .notDetermined: // Authorization not determined yet. | ||
| authorizationStatus = .notDetermined | ||
| manager.requestWhenInUseAuthorization() | ||
| break | ||
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| default: | ||
| break | ||
| } | ||
| } | ||
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| public func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) { | ||
| print("error: \(error.localizedDescription)") | ||
| locationContinuation?.resume(throwing: error) | ||
| } | ||
| } |
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