mirror of
https://github.com/firebase/firebase-ios-sdk
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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.
79 lines
2.5 KiB
Swift
79 lines
2.5 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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/// An internal data model for `ModalityTokenCount`.
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///
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/// ### Gemini Developer API
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///
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/// Type: `GoogleAiGenerativelanguageV1betaModalityTokenCount`
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///
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/// Represents token counting info for a single modality.
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///
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/// ### Gemini Enterprise Agent Platform
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///
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/// Type: `GoogleCloudAiplatformV1beta1ModalityTokenCount`
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///
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/// Represents a breakdown of token usage by modality.
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///
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/// This message is used in
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/// CountTokensResponse
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/// and
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/// GenerateContentResponse.UsageMetadata
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/// to provide a detailed view of how
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/// many tokens are used by each modality (e.g., text, image, video) in a
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/// request. This is particularly useful for multimodal models, allowing you to
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/// track and manage token consumption for billing and quota purposes.
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package struct ModalityTokenCount: Codable, Sendable, Equatable, Hashable {
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/// The modality associated with this token count.
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///
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/// ### Gemini Developer API
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///
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/// The modality associated with this token count.
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///
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/// ### Gemini Enterprise Agent Platform
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///
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/// The modality that this token count applies to.
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package let modality: Modality?
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/// Number of tokens.
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///
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/// ### Gemini Developer API
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///
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/// Number of tokens.
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///
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/// ### Gemini Enterprise Agent Platform
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///
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/// The number of tokens counted for this modality.
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package let tokenCount: Int?
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/// Creates a new `ModalityTokenCount`.
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///
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/// - Parameters:
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/// - modality: The modality associated with this token count. (behavior varies by backend). For more details, see ``modality``.
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/// - tokenCount: Number of tokens. (behavior varies by backend). For more details, see ``tokenCount``.
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package init(
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modality: Modality? = nil,
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tokenCount: Int? = nil
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) {
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self.modality = modality
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self.tokenCount = tokenCount
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}
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enum CodingKeys: String, CodingKey {
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case modality = "modality"
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case tokenCount = "tokenCount"
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}
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}
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