cfy666
fd5c7712f8
- 引入 cloudwego/eino v0.9.9 和 eino-ext/components/model/openai v0.1.13 - 新增 internal/eino/ 包： - types.go: PipelineInput/Output、STTOutput、TokenUsage 类型定义 - state.go: PipelineState 跨节点状态收集（线程安全） - callback.go: ChatModel OnEndWithStreamOutput 回调，逐 token 推送 llm_chunk - nodes_stt.go: STT Lambda，支持文本/语音输入模式 - nodes_history.go: 历史组装 Lambda，含多模态图片支持 - nodes_splitter.go: 句子分割 Transform Lambda - nodes_tts.go: TTS Lambda，逐句合成推送音频 - nodes_done.go: Done Lambda，发送 llm_done 并追加历史 Co-Authored-By: Claude <noreply@anthropic.com>
118 lines
3.3 KiB
Go
118 lines
3.3 KiB
Go
package eino
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import (
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"context"
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"encoding/base64"
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"github.com/cloudwego/eino/compose"
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"github.com/cloudwego/eino/schema"
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"github.com/hhs/camtalk/internal/ai/llm"
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"github.com/hhs/camtalk/internal/logger"
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"github.com/hhs/camtalk/internal/models"
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)
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// HistoryInput 历史组装节点的输入，包含 STT 输出和原始请求信息。
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type HistoryInput struct {
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STTOutput *STTOutput
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SessionID string
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RequestID string
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ImageData []byte
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Scenario string
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DetailLevel string
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}
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// NewHistoryLambda 创建历史组装 Lambda 节点。
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// 输入: HistoryInput → 输出: []*schema.Message
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//
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// 构建系统提示词，组装历史消息和当前用户输入（含多模态图片）。
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func NewHistoryLambda(historyFetcher func(ctx context.Context, sessionID string, maxHistory int) ([]models.Message, error), maxHistory int) *compose.Lambda {
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return compose.InvokableLambda(func(ctx context.Context, input *HistoryInput) ([]*schema.Message, error) {
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log := logger.Log
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requestID := input.RequestID
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// 构建系统提示词
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scenarioPrompt := llm.GetScenarioPrompt(input.Scenario, input.STTOutput.Language)
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systemPrompt := llm.BuildSystemPrompt(input.STTOutput.Language, input.DetailLevel, scenarioPrompt)
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// 构建 system message（含图片）
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systemMsg := &schema.Message{
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Role: schema.System,
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Content: systemPrompt,
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}
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// 如果有图片，添加到 system message 的多模态内容中
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if len(input.ImageData) > 0 {
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base64Str := base64.StdEncoding.EncodeToString(input.ImageData)
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mimeType := detectImageMimeType(input.ImageData)
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systemMsg.UserInputMultiContent = []schema.MessageInputPart{
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{
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Type: schema.ChatMessagePartTypeImageURL,
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Image: &schema.MessageInputImage{
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MessagePartCommon: schema.MessagePartCommon{
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Base64Data: &base64Str,
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MIMEType: mimeType,
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},
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Detail: schema.ImageURLDetailAuto,
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},
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},
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}
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}
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messages := []*schema.Message{systemMsg}
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// 获取并追加历史消息
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if historyFetcher != nil && input.SessionID != "" {
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history, err := historyFetcher(ctx, input.SessionID, maxHistory)
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if err != nil {
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log.Warnw("获取历史消息失败，继续处理", "error", err, "request_id", requestID)
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} else {
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for _, msg := range history {
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messages = append(messages, &schema.Message{
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Role: schema.RoleType(msg.Role),
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Content: msg.Content,
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})
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}
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}
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}
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// 追加当前用户输入
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messages = append(messages, &schema.Message{
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Role: schema.User,
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Content: input.STTOutput.Text,
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})
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log.Infow("历史组装完成",
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"request_id", requestID,
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"message_count", len(messages),
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"has_image", len(input.ImageData) > 0,
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"scenario", input.Scenario)
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return messages, nil
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})
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}
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// detectImageMimeType 简单检测图片 MIME 类型。
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func detectImageMimeType(data []byte) string {
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if len(data) < 4 {
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return "image/jpeg"
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}
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// JPEG: FF D8 FF
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if data[0] == 0xFF && data[1] == 0xD8 && data[2] == 0xFF {
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return "image/jpeg"
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}
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// PNG: 89 50 4E 47
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if data[0] == 0x89 && data[1] == 0x50 && data[2] == 0x4E && data[3] == 0x47 {
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return "image/png"
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}
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// GIF: 47 49 46 38
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if data[0] == 0x47 && data[1] == 0x49 && data[2] == 0x46 {
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return "image/gif"
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}
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// WebP: 52 49 46 46
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if data[0] == 0x52 && data[1] == 0x49 && data[2] == 0x46 && data[3] == 0x46 {
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return "image/webp"
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}
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return "image/jpeg" // 默认
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}
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