Implement Maps Grounding feature

FirebaseAI/Sources/GenerateContentResponse.swift

@@ -375,6 +375,8 @@ public struct GroundingMetadata: Sendable, Equatable, Hashable {
   public struct GroundingChunk: Sendable, Equatable, Hashable {
     /// Contains details if the grounding chunk is from a web source.
     public let web: WebGroundingChunk?
+    /// Contains details if the grounding chunk is from Google Maps.
+    public let maps: MapsGroundingChunk?
   }
 
   /// A grounding chunk sourced from the web.
@@ -390,6 +392,17 @@ public struct GroundingMetadata: Sendable, Equatable, Hashable {
     public let domain: String?
   }
 
+  /// A grounding chunk sourced from Google Maps.
+  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+  public struct MapsGroundingChunk: Sendable, Equatable, Hashable {
+    /// The URI of the retrieved map data.
+    public let uri: String?
+    /// The title of the retrieved map data.
+    public let title: String?
+    /// The place ID of the retrieved map data.
+    public let placeId: String?
+  }
+
   /// Provides information about how a specific segment of the model's response is supported by the
   /// retrieved grounding chunks.
   @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
@@ -705,6 +718,9 @@ extension GroundingMetadata.GroundingChunk: Decodable {}
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GroundingMetadata.WebGroundingChunk: Decodable {}
 
+@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+extension GroundingMetadata.MapsGroundingChunk: Decodable {}
+
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GroundingMetadata.GroundingSupport.Internal: Decodable {
   enum CodingKeys: String, CodingKey {

FirebaseAI/Sources/Tool.swift

@@ -63,6 +63,12 @@ public struct GoogleSearch: Sendable {
   public init() {}
 }
 
+/// A tool that allows the generative model to use Google Maps data.
+@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+public struct GoogleMaps: Sendable {
+  public init() {}
+}
+
 /// A helper tool that the model may use when generating responses.
 ///
 /// A `Tool` is a piece of code that enables the system to interact with external systems to perform
@@ -75,15 +81,20 @@ public struct Tool: Sendable {
   /// Specifies the Google Search configuration.
   let googleSearch: GoogleSearch?
 
+  /// Specifies the Google Maps configuration.
+  let googleMaps: GoogleMaps?
+
   let codeExecution: CodeExecution?
   let urlContext: URLContext?
 
   init(functionDeclarations: [FunctionDeclaration]? = nil,
        googleSearch: GoogleSearch? = nil,
+       googleMaps: GoogleMaps? = nil,
        urlContext: URLContext? = nil,
        codeExecution: CodeExecution? = nil) {
     self.functionDeclarations = functionDeclarations
     self.googleSearch = googleSearch
+    self.googleMaps = googleMaps
     self.urlContext = urlContext
     self.codeExecution = codeExecution
   }
@@ -131,6 +142,16 @@ public struct Tool: Sendable {
     return self.init(googleSearch: googleSearch)
   }
 
+  /// Creates a tool that allows the model to use Google Maps.
+  ///
+  /// - Parameters:
+  ///   - googleMaps: An empty ``GoogleMaps`` object.
+  ///
+  /// - Returns: A `Tool` configured for Google Maps.
+  public static func googleMaps(_ googleMaps: GoogleMaps = GoogleMaps()) -> Tool {
+    return self.init(googleMaps: googleMaps)
+  }
+
   /// Creates a tool that allows you to provide additional context to the models in the form of
   /// public web URLs.
   ///
@@ -237,5 +258,8 @@ extension FunctionCallingConfig.Mode: Encodable {}
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GoogleSearch: Encodable {}
 
+@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+extension GoogleMaps: Encodable {}
+
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ToolConfig: Encodable {}

FirebaseAI/Tests/Unit/GenerativeModelVertexAITests.swift

@@ -839,6 +839,35 @@ final class GenerativeModelVertexAITests: XCTestCase {
     _ = try await model.generateContent(testPrompt)
   }
 
+  func testGenerateContent_withGoogleMapsTool_mapsGroundingMetadata() async throws {
+    let model = GenerativeModel(
+      modelName: testModelName,
+      modelResourceName: testModelResourceName,
+      firebaseInfo: GenerativeModelTestUtil.testFirebaseInfo(),
+      apiConfig: apiConfig,
+      tools: [.googleMaps()],
+      requestOptions: RequestOptions(),
+      urlSession: urlSession
+    )
+    MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
+      forResource: "unary-success-google-maps-grounding",
+      withExtension: "json",
+      subdirectory: ""
+    )
+
+    let response = try await model.generateContent(testPrompt)
+
+    XCTAssertEqual(response.candidates.count, 1)
+    let candidate = try XCTUnwrap(response.candidates.first)
+    let groundingMetadata = try XCTUnwrap(candidate.groundingMetadata)
+
+    XCTAssertEqual(groundingMetadata.groundingChunks.count, 1)
+    let firstChunk = try XCTUnwrap(groundingMetadata.groundingChunks.first?.maps)
+    XCTAssertEqual(firstChunk.title, "Mountain View")
+    XCTAssertEqual(firstChunk.uri, "https://maps.google.com/?cid=123")
+    XCTAssertEqual(firstChunk.placeId, "places/123456789")
+  }
+
   func testGenerateContent_failure_invalidAPIKey() async throws {
     let expectedStatusCode = 400
     MockURLProtocol

FirebaseAI/Tests/Unit/Resources/unary-success-google-maps-grounding.json

@@ -0,0 +1,32 @@
+{
+  "candidates": [
+    {
+      "content": {
+        "role": "model",
+        "parts": [
+          {
+            "text": "Mountain View is about 40 miles south of San Francisco."
+          }
+        ]
+      },
+      "finishReason": "STOP",
+      "index": 0,
+      "groundingMetadata": {
+        "groundingChunks": [
+          {
+            "maps": {
+              "uri": "https://maps.google.com/?cid=123",
+              "title": "Mountain View",
+              "placeId": "places/123456789"
+            }
+          }
+        ]
+      }
+    }
+  ],
+  "usageMetadata": {
+    "promptTokenCount": 10,
+    "candidatesTokenCount": 15,
+    "totalTokenCount": 25
+  }
+}