mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-11 22:55:59 +05:45
Andrew Heard
3796a55fdf
Implemented `GeminiLanguageModel`, providing an adapter for Google's Gemini models conforming to Apple's `FoundationModels.LanguageModel` protocol. This PR includes text to text generation capabilities; other modalities and Gemini features will be handled in follow-up PRs. **Note:** The `GeminiLanguageModel` implementation is guarded by the environment variable `GEMINI_LANGUAGE_MODEL`. By default none of the `GeminiLanguageModel` implementation is included. Key additions: - `GeminiLanguageModel`: Implements `LanguageModel` protocol with reasoning capabilities, configuring execution via `ModelResource` and `EndpointConfiguration`. - `GeminiLanguageModelExecutor`: Converts prompt instructions and history into Gemini streaming requests, yielding responses as `LanguageModelSession.ResponseStream`. - `GeminiTranscriptTranslator`: Translates Apple `Transcript` entries and segments into Gemini `Content` structures while preserving thought signatures and validating supported transcript features. - `GeminiLanguageModel.Error` and `GeminiErrorMapper`: Translates Gemini API, HTTP, and network errors into standard `LanguageModelError` cases (`rateLimited`, `timeout`, `guardrailViolation`, `refusal`, and `unsupportedLanguageOrLocale`) or `GeminiLanguageModel.Error` cases (`serviceUnavailable`, `networkFailure`, `modelNotFound`, `apiError`). The `APIError` payload is designed for seamless forward compatibility with both GenerateContent and the upcoming Interactions API. - Testing infrastructure: Adds `ConditionTrait.requireFoundationModels` to conditionally run Foundation Models tests only on supported platforms (macOS 27+, iOS 27+, watchOS 27+, visionOS 27+), along with shared test constants, mock fixtures, and comprehensive unit and integration test suites.
100 lines
2.7 KiB
Swift
100 lines
2.7 KiB
Swift
// Copyright 2026 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import Foundation
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package import GeminiAPIDataModels
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#if canImport(FoundationNetworking)
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import FoundationNetworking
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#endif
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/// Errors thrown by `GeminiAPIClient`.
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@available(macOS 15.0, iOS 18.0, tvOS 18.0, watchOS 11.0, visionOS 2.0, *)
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package enum GeminiAPIError: Error, Sendable, Equatable {
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/// An API error returned by the Google Gemini service conforming to AIP-0193.
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case apiError(GoogleCloudAPIError)
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/// An HTTP failure status code with a raw response body.
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case httpError(statusCode: Int, body: String)
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}
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@available(macOS 15.0, iOS 18.0, tvOS 18.0, watchOS 11.0, visionOS 2.0, *)
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extension GeminiAPIError {
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/// The retry delay advice for this error, if available from headers or payload details.
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package var retryAfter: Duration? {
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switch self {
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case .apiError(let error):
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error.retryDelay
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case .httpError:
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nil
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}
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}
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}
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@available(macOS 15.0, iOS 18.0, tvOS 18.0, watchOS 11.0, visionOS 2.0, *)
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extension GeminiAPIError: LocalizedError {
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package static var errorDomain: String { "GeminiAPIClient.GeminiAPIError" }
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package var errorDescription: String? {
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switch self {
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case .apiError(let error):
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error.errorDescription
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case .httpError(let statusCode, let body):
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"HTTP \(statusCode): \(body)"
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}
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}
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package var failureReason: String? {
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switch self {
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case .apiError(let error):
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error.failureReason
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case .httpError(let statusCode, _):
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"HTTP status \(statusCode)"
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}
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}
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package var helpAnchor: String? {
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switch self {
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case .apiError(let error):
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error.helpAnchor
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case .httpError:
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nil
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}
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}
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}
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@available(macOS 15.0, iOS 18.0, tvOS 18.0, watchOS 11.0, visionOS 2.0, *)
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extension GeminiAPIError: CustomNSError {
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package var errorCode: Int {
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switch self {
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case .apiError(let error):
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error.errorCode
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case .httpError(let statusCode, _):
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statusCode
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}
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}
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package var errorUserInfo: [String: Any] {
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switch self {
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case .apiError(let error):
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error.errorUserInfo
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case .httpError(let statusCode, let body):
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[
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"statusCode": statusCode,
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"body": body,
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]
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}
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}
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}
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