mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-09 22:36:01 +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.
94 lines
2.9 KiB
Swift
94 lines
2.9 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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/// A collection of name-value pairs representing a JSON object.
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///
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/// This may be decoded from, or encoded to, a `google.protobuf.Struct`
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/// (https://protobuf.dev/reference/protobuf/google.protobuf/#struct).
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package typealias JSONObject = [String: JSONValue]
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/// Represents a value in one of JSON's data types.
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///
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/// This may be decoded from, or encoded to, a `google.protobuf.Value`
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/// (https://protobuf.dev/reference/protobuf/google.protobuf/#value).
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package enum JSONValue: Sendable, Hashable {
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/// A `null` value.
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case null
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/// A numeric value.
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case number(Double)
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/// A string value.
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case string(String)
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/// A boolean value.
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case bool(Bool)
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/// A JSON object.
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case object(JSONObject)
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/// An array of `JSONValue`s.
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case array([JSONValue])
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}
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// MARK: - Codable Conformances
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extension JSONValue: Decodable {
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package init(from decoder: any Decoder) throws {
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let container = try decoder.singleValueContainer()
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if container.decodeNil() {
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self = .null
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} else if let numberValue = try? container.decode(Double.self) {
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self = .number(numberValue)
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} else if let stringValue = try? container.decode(String.self) {
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self = .string(stringValue)
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} else if let boolValue = try? container.decode(Bool.self) {
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self = .bool(boolValue)
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} else if let objectValue = try? container.decode(JSONObject.self) {
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self = .object(objectValue)
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} else if let arrayValue = try? container.decode([JSONValue].self) {
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self = .array(arrayValue)
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} else {
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throw DecodingError.dataCorruptedError(
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in: container,
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debugDescription: "Failed to decode JSON value."
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)
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}
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}
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}
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extension JSONValue: Encodable {
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package func encode(to encoder: any Encoder) throws {
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var container = encoder.singleValueContainer()
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switch self {
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case .null:
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try container.encodeNil()
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case .number(let numberValue):
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// Convert to `Decimal` before encoding for consistent floating-point
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// serialization across platforms.
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try container.encode(Decimal(numberValue))
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case .string(let stringValue):
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try container.encode(stringValue)
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case .bool(let boolValue):
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try container.encode(boolValue)
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case .object(let objectValue):
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try container.encode(objectValue)
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case .array(let arrayValue):
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try container.encode(arrayValue)
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}
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}
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}
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