runeandClaude Sonnet 5
bd686873c4
Consolidates the mac.oai.pm subdomain references (introduced in the PolyForm Noncommercial relicense) to the root oai.pm domain, across the LICENSE file, README, and all Swift source file headers. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
593 lines
26 KiB
Swift
593 lines
26 KiB
Swift
//
|
|
// OpenRouterProvider.swift
|
|
// oAI
|
|
//
|
|
// OpenRouter AI provider implementation with SSE streaming
|
|
//
|
|
// SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0
|
|
// Copyright (C) 2026 Rune Olsen
|
|
//
|
|
// This file is part of oAI.
|
|
//
|
|
// oAI is licensed under the PolyForm Noncommercial License 1.0.0.
|
|
// You may use, study, modify, and share it for any noncommercial
|
|
// purpose. Commercial use — including selling oAI or any part of
|
|
// it, standalone or bundled into another product or service —
|
|
// requires a separate commercial license from the copyright holder.
|
|
//
|
|
// See the LICENSE file or
|
|
// <https://polyformproject.org/licenses/noncommercial/1.0.0> for
|
|
// the full license text. For commercial licensing, contact Rune
|
|
// Olsen via <https://oai.pm>.
|
|
|
|
|
|
import Foundation
|
|
import os
|
|
|
|
class OpenRouterProvider: AIProvider {
|
|
let name = "OpenRouter"
|
|
let capabilities = ProviderCapabilities(
|
|
supportsStreaming: true,
|
|
supportsVision: true,
|
|
supportsTools: true,
|
|
supportsOnlineSearch: true,
|
|
maxContextLength: nil
|
|
)
|
|
|
|
private let apiKey: String
|
|
private let baseURL = "https://openrouter.ai/api/v1"
|
|
private let session: URLSession
|
|
|
|
init(apiKey: String) {
|
|
self.apiKey = apiKey
|
|
|
|
let config = URLSessionConfiguration.default
|
|
config.timeoutIntervalForRequest = 60
|
|
config.timeoutIntervalForResource = 300
|
|
self.session = URLSession(configuration: config)
|
|
}
|
|
|
|
// MARK: - List Models
|
|
|
|
func listModels() async throws -> [ModelInfo] {
|
|
Log.api.info("Fetching model list from OpenRouter")
|
|
|
|
// Fetch chat models and image models in parallel
|
|
async let chatData = fetchRaw(path: "/models")
|
|
async let imageData = fetchRaw(path: "/images/models")
|
|
let (chatRaw, imageRaw) = try await (chatData, imageData)
|
|
|
|
let modelsResponse = try JSONDecoder().decode(OpenRouterModelsResponse.self, from: chatRaw)
|
|
Log.api.info("OpenRouter loaded \(modelsResponse.data.count) chat models")
|
|
|
|
var models = modelsResponse.data.map { modelData in
|
|
let promptPrice = Double(modelData.pricing.prompt) ?? 0.0
|
|
let completionPrice = Double(modelData.pricing.completion) ?? 0.0
|
|
|
|
var info = ModelInfo(
|
|
id: modelData.id,
|
|
name: modelData.name,
|
|
description: modelData.description,
|
|
contextLength: modelData.contextLength,
|
|
pricing: ModelInfo.Pricing(
|
|
prompt: promptPrice * 1_000_000, // Convert to per 1M tokens
|
|
completion: completionPrice * 1_000_000
|
|
),
|
|
capabilities: ModelInfo.ModelCapabilities(
|
|
vision: {
|
|
let mod = modelData.architecture?.modality ?? ""
|
|
return mod == "multimodal" || mod.hasPrefix("text+image")
|
|
}(),
|
|
tools: modelData.supportedParameters?.contains("tools") ?? false,
|
|
online: {
|
|
// OpenRouter supports :online suffix for all text models
|
|
let mod = modelData.architecture?.modality ?? ""
|
|
if let arrow = mod.range(of: "->") {
|
|
return !mod[arrow.upperBound...].contains("image")
|
|
}
|
|
return true
|
|
}(),
|
|
imageGeneration: {
|
|
if let mod = modelData.architecture?.modality,
|
|
let arrow = mod.range(of: "->") {
|
|
let output = mod[arrow.upperBound...]
|
|
return output.contains("image")
|
|
}
|
|
return false
|
|
}(),
|
|
thinking: modelData.supportedParameters?.contains("reasoning") ?? false
|
|
),
|
|
architecture: modelData.architecture.map { arch in
|
|
ModelInfo.Architecture(
|
|
tokenizer: arch.tokenizer,
|
|
instructType: arch.instructType,
|
|
modality: arch.modality
|
|
)
|
|
},
|
|
topProvider: modelData.id.components(separatedBy: "/").first
|
|
)
|
|
info.categories = ModelCategory.infer(
|
|
name: modelData.name,
|
|
id: modelData.id,
|
|
description: modelData.description
|
|
)
|
|
return info
|
|
}
|
|
|
|
// Merge dedicated image models (these don't appear in /models)
|
|
if let imageModelsResponse = try? JSONDecoder().decode(OpenRouterImageModelsResponse.self, from: imageRaw) {
|
|
Log.api.info("OpenRouter loaded \(imageModelsResponse.data.count) image models")
|
|
let existingIds = Set(models.map { $0.id })
|
|
let imageModels = imageModelsResponse.data.compactMap { m -> ModelInfo? in
|
|
guard !existingIds.contains(m.id) else { return nil }
|
|
let acceptsImageInput = m.architecture?.inputModalities?.contains("image") ?? false
|
|
var info = ModelInfo(
|
|
id: m.id,
|
|
name: m.name,
|
|
description: m.description,
|
|
contextLength: 0,
|
|
pricing: ModelInfo.Pricing(prompt: 0, completion: 0),
|
|
capabilities: ModelInfo.ModelCapabilities(
|
|
vision: acceptsImageInput,
|
|
tools: false,
|
|
online: false,
|
|
imageGeneration: true,
|
|
thinking: false,
|
|
usesImagesAPI: true
|
|
),
|
|
topProvider: m.id.components(separatedBy: "/").first
|
|
)
|
|
info.categories = ModelCategory.infer(name: m.name, id: m.id, description: m.description)
|
|
return info
|
|
}
|
|
models.append(contentsOf: imageModels)
|
|
}
|
|
|
|
return models
|
|
}
|
|
|
|
private func fetchRaw(path: String) async throws -> Data {
|
|
let url = URL(string: "\(baseURL)\(path)")!
|
|
var request = URLRequest(url: url)
|
|
request.addValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
|
|
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
|
|
let (data, response) = try await session.data(for: request)
|
|
guard let httpResponse = response as? HTTPURLResponse else { throw ProviderError.invalidResponse }
|
|
guard httpResponse.statusCode == 200 else {
|
|
if let err = try? JSONDecoder().decode(OpenRouterErrorResponse.self, from: data) {
|
|
throw ProviderError.unknown(err.error.message)
|
|
}
|
|
throw ProviderError.unknown("HTTP \(httpResponse.statusCode)")
|
|
}
|
|
return data
|
|
}
|
|
|
|
// MARK: - Images API
|
|
|
|
func generateImage(model: String, prompt: String) async throws -> ChatResponse {
|
|
Log.api.info("OpenRouter images API: model=\(model)")
|
|
let url = URL(string: "\(baseURL)/images")!
|
|
var urlRequest = URLRequest(url: url)
|
|
urlRequest.httpMethod = "POST"
|
|
urlRequest.addValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
|
|
urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
|
|
urlRequest.addValue("https://github.com/yourusername/oAI", forHTTPHeaderField: "HTTP-Referer")
|
|
urlRequest.addValue("oAI-Swift", forHTTPHeaderField: "X-Title")
|
|
urlRequest.httpBody = try JSONSerialization.data(withJSONObject: ["model": model, "prompt": prompt])
|
|
|
|
let (data, response) = try await session.data(for: urlRequest)
|
|
guard let httpResponse = response as? HTTPURLResponse else { throw ProviderError.invalidResponse }
|
|
|
|
if httpResponse.statusCode != 200 {
|
|
if let err = try? JSONDecoder().decode(OpenRouterErrorResponse.self, from: data) {
|
|
Log.api.error("OpenRouter images HTTP \(httpResponse.statusCode): \(err.error.message)")
|
|
throw ProviderError.unknown(err.error.message)
|
|
}
|
|
Log.api.error("OpenRouter images HTTP \(httpResponse.statusCode)")
|
|
throw ProviderError.unknown("HTTP \(httpResponse.statusCode)")
|
|
}
|
|
|
|
if let rawStr = String(data: data, encoding: .utf8) {
|
|
Log.api.debug("Images API raw response (first 200 chars): \(rawStr.prefix(200))")
|
|
}
|
|
|
|
let imageResponse = try JSONDecoder().decode(OpenRouterImageGenerationResponse.self, from: data)
|
|
let images: [Data] = imageResponse.data.compactMap { item in
|
|
Data(base64Encoded: item.b64Json)
|
|
}
|
|
|
|
let usage: ChatResponse.Usage? = imageResponse.usage.map { u in
|
|
ChatResponse.Usage(
|
|
promptTokens: u.promptTokens,
|
|
completionTokens: u.completionTokens,
|
|
totalTokens: u.totalTokens,
|
|
rawCostUSD: u.cost
|
|
)
|
|
}
|
|
|
|
return ChatResponse(
|
|
id: UUID().uuidString,
|
|
model: model,
|
|
content: "",
|
|
role: "assistant",
|
|
finishReason: "stop",
|
|
usage: usage,
|
|
created: Date(),
|
|
generatedImages: images.isEmpty ? nil : images
|
|
)
|
|
}
|
|
|
|
func getModel(_ id: String) async throws -> ModelInfo? {
|
|
let models = try await listModels()
|
|
return models.first { $0.id == id }
|
|
}
|
|
|
|
// MARK: - Chat Completion
|
|
|
|
func chat(request: ChatRequest) async throws -> ChatResponse {
|
|
Log.api.info("OpenRouter chat request: model=\(request.model), messages=\(request.messages.count)")
|
|
let apiRequest = try buildAPIRequest(from: request)
|
|
let url = URL(string: "\(baseURL)/chat/completions")!
|
|
|
|
var urlRequest = URLRequest(url: url)
|
|
urlRequest.httpMethod = "POST"
|
|
urlRequest.addValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
|
|
urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
|
|
urlRequest.addValue("https://github.com/yourusername/oAI", forHTTPHeaderField: "HTTP-Referer")
|
|
urlRequest.addValue("oAI-Swift", forHTTPHeaderField: "X-Title")
|
|
urlRequest.httpBody = try JSONEncoder().encode(apiRequest)
|
|
|
|
let (data, response) = try await session.data(for: urlRequest)
|
|
|
|
guard let httpResponse = response as? HTTPURLResponse else {
|
|
throw ProviderError.invalidResponse
|
|
}
|
|
|
|
guard httpResponse.statusCode == 200 else {
|
|
if let errorResponse = try? JSONDecoder().decode(OpenRouterErrorResponse.self, from: data) {
|
|
Log.api.error("OpenRouter chat HTTP \(httpResponse.statusCode): \(errorResponse.error.message)")
|
|
throw ProviderError.unknown(errorResponse.error.message)
|
|
}
|
|
Log.api.error("OpenRouter chat HTTP \(httpResponse.statusCode)")
|
|
throw ProviderError.unknown("HTTP \(httpResponse.statusCode)")
|
|
}
|
|
|
|
// Debug: log raw response for image gen models
|
|
if request.imageGeneration, let rawStr = String(data: data, encoding: .utf8) {
|
|
Log.api.debug("Image gen raw response (first 3000 chars): \(rawStr.prefix(3000))")
|
|
}
|
|
|
|
let apiResponse = try JSONDecoder().decode(OpenRouterChatResponse.self, from: data)
|
|
let chatResponse = try convertToChatResponse(apiResponse)
|
|
if request.imageGeneration {
|
|
Log.api.debug("Image gen decoded: content='\(chatResponse.content)', generatedImages=\(chatResponse.generatedImages?.count ?? 0)")
|
|
}
|
|
return chatResponse
|
|
}
|
|
|
|
// MARK: - Chat with raw tool messages
|
|
|
|
/// Chat completion that accepts pre-encoded messages (for the tool call loop where
|
|
/// message shapes vary: user, assistant+tool_calls, tool results).
|
|
func chatWithToolMessages(model: String, messages: [[String: Any]], tools: [Tool]?, maxTokens: Int?, temperature: Double?) async throws -> ChatResponse {
|
|
let url = URL(string: "\(baseURL)/chat/completions")!
|
|
|
|
var body: [String: Any] = [
|
|
"model": model,
|
|
"messages": messages,
|
|
"stream": false
|
|
]
|
|
if let tools = tools {
|
|
let toolsData = try JSONEncoder().encode(tools)
|
|
body["tools"] = try JSONSerialization.jsonObject(with: toolsData)
|
|
body["tool_choice"] = "auto"
|
|
}
|
|
if let maxTokens = maxTokens { body["max_tokens"] = maxTokens }
|
|
if let temperature = temperature { body["temperature"] = temperature }
|
|
// Anthropic models require an explicit cache_control opt-in on OpenRouter;
|
|
// other providers cache automatically.
|
|
if model.hasPrefix("anthropic/") {
|
|
body["cache_control"] = ["type": "ephemeral"]
|
|
}
|
|
|
|
var urlRequest = URLRequest(url: url)
|
|
urlRequest.httpMethod = "POST"
|
|
urlRequest.addValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
|
|
urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
|
|
urlRequest.addValue("https://github.com/yourusername/oAI", forHTTPHeaderField: "HTTP-Referer")
|
|
urlRequest.addValue("oAI-Swift", forHTTPHeaderField: "X-Title")
|
|
urlRequest.httpBody = try JSONSerialization.data(withJSONObject: body)
|
|
|
|
let (data, response) = try await session.data(for: urlRequest)
|
|
|
|
guard let httpResponse = response as? HTTPURLResponse else {
|
|
throw ProviderError.invalidResponse
|
|
}
|
|
|
|
guard httpResponse.statusCode == 200 else {
|
|
if let errorResponse = try? JSONDecoder().decode(OpenRouterErrorResponse.self, from: data) {
|
|
Log.api.error("OpenRouter tool chat HTTP \(httpResponse.statusCode): \(errorResponse.error.message)")
|
|
throw ProviderError.unknown(errorResponse.error.message)
|
|
}
|
|
Log.api.error("OpenRouter tool chat HTTP \(httpResponse.statusCode)")
|
|
throw ProviderError.unknown("HTTP \(httpResponse.statusCode)")
|
|
}
|
|
|
|
let apiResponse = try JSONDecoder().decode(OpenRouterChatResponse.self, from: data)
|
|
return try convertToChatResponse(apiResponse)
|
|
}
|
|
|
|
// MARK: - Streaming Chat
|
|
|
|
func streamChat(request: ChatRequest) -> AsyncThrowingStream<StreamChunk, Error> {
|
|
Log.api.info("OpenRouter stream request: model=\(request.model), messages=\(request.messages.count)")
|
|
return AsyncThrowingStream { continuation in
|
|
Task {
|
|
do {
|
|
var apiRequest = try buildAPIRequest(from: request)
|
|
apiRequest.stream = true
|
|
|
|
let url = URL(string: "\(baseURL)/chat/completions")!
|
|
var urlRequest = URLRequest(url: url)
|
|
urlRequest.httpMethod = "POST"
|
|
urlRequest.addValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
|
|
urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
|
|
urlRequest.addValue("text/event-stream", forHTTPHeaderField: "Accept")
|
|
urlRequest.addValue("https://github.com/yourusername/oAI", forHTTPHeaderField: "HTTP-Referer")
|
|
urlRequest.addValue("oAI-Swift", forHTTPHeaderField: "X-Title")
|
|
urlRequest.httpBody = try JSONEncoder().encode(apiRequest)
|
|
|
|
let (bytes, response) = try await session.bytes(for: urlRequest)
|
|
|
|
guard let httpResponse = response as? HTTPURLResponse else {
|
|
Log.api.error("OpenRouter stream: invalid response (not HTTP)")
|
|
continuation.finish(throwing: ProviderError.invalidResponse)
|
|
return
|
|
}
|
|
|
|
guard httpResponse.statusCode == 200 else {
|
|
Log.api.error("OpenRouter stream HTTP \(httpResponse.statusCode)")
|
|
continuation.finish(throwing: ProviderError.unknown("HTTP \(httpResponse.statusCode)"))
|
|
return
|
|
}
|
|
|
|
var buffer = ""
|
|
|
|
for try await line in bytes.lines {
|
|
if line.hasPrefix("data: ") {
|
|
let jsonString = String(line.dropFirst(6))
|
|
|
|
if jsonString == "[DONE]" {
|
|
continuation.finish()
|
|
return
|
|
}
|
|
|
|
buffer += jsonString
|
|
|
|
if let jsonData = buffer.data(using: .utf8) {
|
|
do {
|
|
let chunk = try JSONDecoder().decode(OpenRouterStreamChunk.self, from: jsonData)
|
|
let streamChunk = try convertToStreamChunk(chunk)
|
|
continuation.yield(streamChunk)
|
|
buffer = ""
|
|
} catch {
|
|
// Partial JSON, keep buffering
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
continuation.finish()
|
|
} catch {
|
|
continuation.finish(throwing: error)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// MARK: - Credits
|
|
|
|
func getCredits() async throws -> Credits? {
|
|
Log.api.info("Fetching OpenRouter credits")
|
|
let url = URL(string: "\(baseURL)/credits")!
|
|
var request = URLRequest(url: url)
|
|
request.addValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
|
|
|
|
let (data, response) = try await session.data(for: request)
|
|
|
|
guard let httpResponse = response as? HTTPURLResponse,
|
|
httpResponse.statusCode == 200 else {
|
|
return nil
|
|
}
|
|
|
|
let creditsResponse = try JSONDecoder().decode(OpenRouterCreditsResponse.self, from: data)
|
|
let totalCredits = creditsResponse.data.totalCredits ?? 0
|
|
let totalUsage = creditsResponse.data.totalUsage ?? 0
|
|
let remaining = totalCredits - totalUsage
|
|
|
|
return Credits(
|
|
balance: remaining,
|
|
currency: "USD",
|
|
usage: totalUsage,
|
|
limit: totalCredits
|
|
)
|
|
}
|
|
|
|
// MARK: - Helper Methods
|
|
|
|
private func buildAPIRequest(from request: ChatRequest) throws -> OpenRouterChatRequest {
|
|
let apiMessages = request.messages.map { message -> OpenRouterChatRequest.APIMessage in
|
|
|
|
let hasAttachments = message.attachments?.contains(where: { $0.data != nil }) ?? false
|
|
|
|
let content: OpenRouterChatRequest.APIMessage.MessageContent
|
|
|
|
if hasAttachments {
|
|
// Use array format for messages with attachments
|
|
var contentArray: [OpenRouterChatRequest.APIMessage.ContentItem] = []
|
|
|
|
// Add main text content
|
|
contentArray.append(.text(message.content))
|
|
|
|
// Add attachments
|
|
if let attachments = message.attachments {
|
|
for attachment in attachments {
|
|
guard let data = attachment.data else { continue }
|
|
|
|
switch attachment.type {
|
|
case .image, .pdf:
|
|
// Send as base64 data URL with correct MIME type
|
|
let base64String = data.base64EncodedString()
|
|
let dataURL = "data:\(attachment.mimeType);base64,\(base64String)"
|
|
let imageContent = OpenRouterChatRequest.APIMessage.ContentItem.ImageContent(
|
|
type: "image_url",
|
|
imageUrl: .init(url: dataURL)
|
|
)
|
|
contentArray.append(.image(imageContent))
|
|
|
|
case .text:
|
|
// Inline text file content
|
|
let filename = (attachment.path as NSString).lastPathComponent
|
|
let textContent = String(data: data, encoding: .utf8) ?? ""
|
|
contentArray.append(.text("File: \(filename)\n\n\(textContent)"))
|
|
}
|
|
}
|
|
}
|
|
|
|
content = .array(contentArray)
|
|
} else {
|
|
// Use simple string format for text-only messages
|
|
content = .string(message.content)
|
|
}
|
|
|
|
return OpenRouterChatRequest.APIMessage(
|
|
role: message.role.rawValue,
|
|
content: content
|
|
)
|
|
}
|
|
|
|
// Append :online suffix for web search when online mode is enabled
|
|
let effectiveModel: String
|
|
if request.onlineMode && !request.imageGeneration && !request.model.hasSuffix(":online") {
|
|
effectiveModel = request.model + ":online"
|
|
} else {
|
|
effectiveModel = request.model
|
|
}
|
|
|
|
let reasoningConfig: ReasoningAPIConfig? = request.reasoning.map {
|
|
ReasoningAPIConfig(effort: $0.effort, exclude: $0.exclude ? true : nil)
|
|
}
|
|
|
|
// Anthropic models require an explicit cache_control opt-in on OpenRouter;
|
|
// other providers (OpenAI, DeepSeek, Gemini, Grok, etc.) cache automatically.
|
|
let cacheControl: OpenRouterChatRequest.CacheControl? = effectiveModel.hasPrefix("anthropic/")
|
|
? .init(type: "ephemeral")
|
|
: nil
|
|
|
|
return OpenRouterChatRequest(
|
|
model: effectiveModel,
|
|
messages: apiMessages,
|
|
stream: request.stream,
|
|
maxTokens: request.maxTokens,
|
|
temperature: request.temperature,
|
|
topP: request.topP,
|
|
tools: request.tools,
|
|
toolChoice: request.tools != nil ? "auto" : nil,
|
|
modalities: request.imageGeneration ? ["text", "image"] : nil,
|
|
reasoning: reasoningConfig,
|
|
cacheControl: cacheControl
|
|
)
|
|
}
|
|
|
|
private func convertToChatResponse(_ apiResponse: OpenRouterChatResponse) throws -> ChatResponse {
|
|
guard let choice = apiResponse.choices.first else {
|
|
throw ProviderError.invalidResponse
|
|
}
|
|
|
|
let toolCalls: [ToolCallInfo]? = choice.message.toolCalls?.map { tc in
|
|
ToolCallInfo(id: tc.id, type: tc.type, functionName: tc.function.name, arguments: tc.function.arguments)
|
|
}
|
|
|
|
let topLevelImages = choice.message.images.flatMap { decodeImageOutputs($0) } ?? []
|
|
let blockImages = decodeImageOutputs(choice.message.contentBlockImages) ?? []
|
|
let allImages = topLevelImages + blockImages
|
|
let images: [Data]? = allImages.isEmpty ? nil : allImages
|
|
|
|
if let details = apiResponse.usage?.promptTokensDetails,
|
|
details.cachedTokens != nil || details.cacheWriteTokens != nil {
|
|
Log.api.info("OpenRouter cache usage: model=\(apiResponse.model), created=\(details.cacheWriteTokens ?? 0), read=\(details.cachedTokens ?? 0)")
|
|
}
|
|
|
|
return ChatResponse(
|
|
id: apiResponse.id,
|
|
model: apiResponse.model,
|
|
content: choice.message.content ?? "",
|
|
role: choice.message.role,
|
|
finishReason: choice.finishReason,
|
|
usage: apiResponse.usage.map { usage in
|
|
ChatResponse.Usage(
|
|
promptTokens: usage.promptTokens,
|
|
completionTokens: usage.completionTokens,
|
|
totalTokens: usage.totalTokens,
|
|
cacheCreationInputTokens: usage.promptTokensDetails?.cacheWriteTokens,
|
|
cacheReadInputTokens: usage.promptTokensDetails?.cachedTokens
|
|
)
|
|
},
|
|
created: Date(timeIntervalSince1970: TimeInterval(apiResponse.created)),
|
|
toolCalls: toolCalls,
|
|
generatedImages: images
|
|
)
|
|
}
|
|
|
|
private func convertToStreamChunk(_ apiChunk: OpenRouterStreamChunk) throws -> StreamChunk {
|
|
guard let choice = apiChunk.choices.first else {
|
|
throw ProviderError.invalidResponse
|
|
}
|
|
|
|
// Merge images from both sources: top-level `images` field and content-block images
|
|
let topLevelImages = choice.delta.images.flatMap { decodeImageOutputs($0) } ?? []
|
|
let blockImages = decodeImageOutputs(choice.delta.contentBlockImages) ?? []
|
|
let allImages = topLevelImages + blockImages
|
|
let images: [Data]? = allImages.isEmpty ? nil : allImages
|
|
|
|
if let details = apiChunk.usage?.promptTokensDetails,
|
|
details.cachedTokens != nil || details.cacheWriteTokens != nil {
|
|
Log.api.info("OpenRouter stream cache usage: model=\(apiChunk.model), created=\(details.cacheWriteTokens ?? 0), read=\(details.cachedTokens ?? 0)")
|
|
}
|
|
|
|
return StreamChunk(
|
|
id: apiChunk.id,
|
|
model: apiChunk.model,
|
|
delta: StreamChunk.Delta(
|
|
content: choice.delta.content,
|
|
role: choice.delta.role,
|
|
images: images,
|
|
thinking: choice.delta.reasoning
|
|
),
|
|
finishReason: choice.finishReason,
|
|
usage: apiChunk.usage.map { usage in
|
|
ChatResponse.Usage(
|
|
promptTokens: usage.promptTokens,
|
|
completionTokens: usage.completionTokens,
|
|
totalTokens: usage.totalTokens,
|
|
cacheCreationInputTokens: usage.promptTokensDetails?.cacheWriteTokens,
|
|
cacheReadInputTokens: usage.promptTokensDetails?.cachedTokens
|
|
)
|
|
}
|
|
)
|
|
}
|
|
|
|
/// Decode base64 data URL images from API response
|
|
private func decodeImageOutputs(_ outputs: [OpenRouterChatResponse.ImageOutput]) -> [Data]? {
|
|
let decoded = outputs.compactMap { output -> Data? in
|
|
let url = output.imageUrl.url
|
|
// Strip "data:image/...;base64," prefix
|
|
guard let commaIndex = url.firstIndex(of: ",") else { return nil }
|
|
let base64String = String(url[url.index(after: commaIndex)...])
|
|
return Data(base64Encoded: base64String)
|
|
}
|
|
return decoded.isEmpty ? nil : decoded
|
|
}
|
|
}
|