refactor: use adaptor to do relay & test

relay/model/message.go

@@ -0,0 +1,88 @@
+package model
+
+type Message struct {
+	Role    string  `json:"role"`
+	Content any     `json:"content"`
+	Name    *string `json:"name,omitempty"`
+}
+
+func (m Message) IsStringContent() bool {
+	_, ok := m.Content.(string)
+	return ok
+}
+
+func (m Message) StringContent() string {
+	content, ok := m.Content.(string)
+	if ok {
+		return content
+	}
+	contentList, ok := m.Content.([]any)
+	if ok {
+		var contentStr string
+		for _, contentItem := range contentList {
+			contentMap, ok := contentItem.(map[string]any)
+			if !ok {
+				continue
+			}
+			if contentMap["type"] == ContentTypeText {
+				if subStr, ok := contentMap["text"].(string); ok {
+					contentStr += subStr
+				}
+			}
+		}
+		return contentStr
+	}
+	return ""
+}
+
+func (m Message) ParseContent() []MessageContent {
+	var contentList []MessageContent
+	content, ok := m.Content.(string)
+	if ok {
+		contentList = append(contentList, MessageContent{
+			Type: ContentTypeText,
+			Text: content,
+		})
+		return contentList
+	}
+	anyList, ok := m.Content.([]any)
+	if ok {
+		for _, contentItem := range anyList {
+			contentMap, ok := contentItem.(map[string]any)
+			if !ok {
+				continue
+			}
+			switch contentMap["type"] {
+			case ContentTypeText:
+				if subStr, ok := contentMap["text"].(string); ok {
+					contentList = append(contentList, MessageContent{
+						Type: ContentTypeText,
+						Text: subStr,
+					})
+				}
+			case ContentTypeImageURL:
+				if subObj, ok := contentMap["image_url"].(map[string]any); ok {
+					contentList = append(contentList, MessageContent{
+						Type: ContentTypeImageURL,
+						ImageURL: &ImageURL{
+							Url: subObj["url"].(string),
+						},
+					})
+				}
+			}
+		}
+		return contentList
+	}
+	return nil
+}
+
+type ImageURL struct {
+	Url    string `json:"url,omitempty"`
+	Detail string `json:"detail,omitempty"`
+}
+
+type MessageContent struct {
+	Type     string    `json:"type,omitempty"`
+	Text     string    `json:"text"`
+	ImageURL *ImageURL `json:"image_url,omitempty"`
+}