feat: add Gin HTTP API with SSE streaming chat

internal/api/handler_notes.go

@@ -0,0 +1,94 @@
+package api
+
+import (
+	"net/http"
+	"time"
+
+	"eino-test/internal/rag"
+	"eino-test/internal/store"
+
+	"github.com/gin-gonic/gin"
+)
+
+type NoteHandler struct {
+	pipeline *rag.RAGPipeline
+}
+
+func NewNoteHandler(pipeline *rag.RAGPipeline) *NoteHandler {
+	return &NoteHandler{pipeline: pipeline}
+}
+
+func (h *NoteHandler) ListNotes(c *gin.Context) {
+	notes, err := h.pipeline.NoteStore().List(c.Request.Context())
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	var resp []NoteResponse
+	for _, n := range notes {
+		resp = append(resp, NoteResponse{
+			ID:        n.ID,
+			Title:     n.Title,
+			Tags:      n.Tags,
+			CreatedAt: n.CreatedAt.Format(time.RFC3339),
+		})
+	}
+	c.JSON(http.StatusOK, resp)
+}
+
+func (h *NoteHandler) GetNote(c *gin.Context) {
+	id := c.Param("id")
+	note, err := h.pipeline.NoteStore().GetByID(c.Request.Context(), id)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "note not found"})
+		return
+	}
+	c.JSON(http.StatusOK, NoteResponse{
+		ID:        note.ID,
+		Title:     note.Title,
+		Content:   note.Content,
+		Tags:      note.Tags,
+		CreatedAt: note.CreatedAt.Format(time.RFC3339),
+	})
+}
+
+func (h *NoteHandler) CreateNote(c *gin.Context) {
+	var req NoteRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	note := &store.Note{
+		ID:        req.Title,
+		Title:     req.Title,
+		Content:   req.Content,
+		Tags:      req.Tags,
+		CreatedAt: time.Now(),
+		UpdatedAt: time.Now(),
+	}
+	if err := h.pipeline.NoteStore().Create(c.Request.Context(), note); err != nil {
+		c.JSON(http.StatusConflict, gin.H{"error": err.Error()})
+		return
+	}
+	if err := h.pipeline.IndexNote(c.Request.Context(), note); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusCreated, NoteResponse{
+		ID:        note.ID,
+		Title:     note.Title,
+		Content:   note.Content,
+		Tags:      note.Tags,
+		CreatedAt: note.CreatedAt.Format(time.RFC3339),
+	})
+}
+
+func (h *NoteHandler) DeleteNote(c *gin.Context) {
+	id := c.Param("id")
+	if err := h.pipeline.NoteStore().Delete(c.Request.Context(), id); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "note not found"})
+		return
+	}
+	h.pipeline.RemoveNote(id)
+	c.JSON(http.StatusOK, gin.H{"message": "deleted"})
+}