feat: file handlers (upload/list/download/delete)

internal/server/files.go

@@ -0,0 +1,88 @@
+package server
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+	"time"
+	"yoresee_dropbox/internal/store"
+)
+
+func (s *Server) handleUpload(w http.ResponseWriter, r *http.Request) {
+	r.Body = http.MaxBytesReader(w, r.Body, 100<<20)
+	if err := r.ParseMultipartForm(32 << 20); err != nil {
+		http.Error(w, "File too large", http.StatusRequestEntityTooLarge)
+		return
+	}
+
+	file, header, err := r.FormFile("file")
+	if err != nil {
+		http.Error(w, "Missing file", http.StatusBadRequest)
+		return
+	}
+	defer file.Close()
+
+	storageName := generateUUID()
+	destPath := filepath.Join(s.workspace, "inbox", storageName)
+	dest, err := os.Create(destPath)
+	if err != nil {
+		http.Error(w, "Failed to save", http.StatusInternalServerError)
+		return
+	}
+	defer dest.Close()
+
+	if _, err := io.Copy(dest, file); err != nil {
+		http.Error(w, "Failed to save", http.StatusInternalServerError)
+		return
+	}
+
+	f := &store.File{
+		ID:           generateUUID(),
+		OriginalName: header.Filename,
+		StorageName:  storageName,
+		Dir:          "inbox",
+		Size:         header.Size,
+		CreatedAt:    time.Now().Unix(),
+	}
+	if err := s.store.FileCreate(f); err != nil {
+		http.Error(w, "Failed to save metadata", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusCreated)
+	json.NewEncoder(w).Encode(map[string]any{"file": f})
+}
+
+func (s *Server) handleListFiles(w http.ResponseWriter, r *http.Request) {
+	dir := r.URL.Query().Get("dir")
+	files, err := s.store.FileList(dir)
+	if err != nil {
+		http.Error(w, "Failed to list", http.StatusInternalServerError)
+		return
+	}
+	json.NewEncoder(w).Encode(map[string]any{"files": files})
+}
+
+func (s *Server) handleDownload(w http.ResponseWriter, r *http.Request) {
+	id := r.PathValue("id")
+	f, err := s.store.FileGet(id)
+	if err != nil {
+		http.Error(w, "Not found", http.StatusNotFound)
+		return
+	}
+
+	path := filepath.Join(s.workspace, f.Dir, f.StorageName)
+	w.Header().Set("Content-Disposition", "attachment; filename="+f.OriginalName)
+	http.ServeFile(w, r, path)
+}
+
+func (s *Server) handleDeleteFile(w http.ResponseWriter, r *http.Request) {
+	id := r.PathValue("id")
+	if err := s.store.FileDelete(id); err != nil {
+		http.Error(w, "Failed to delete", http.StatusInternalServerError)
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}