Add multi-disk copy workflow

internal/api/handlers_disk.go

@@ -1,14 +1,13 @@
 package api
 
 import (
+	"encoding/json"
 	"net/http"
 
 	"jukebox_maker/internal/disk"
 )
 
 func (s *Server) handleDiskStatus(w http.ResponseWriter, r *http.Request) {
-	info := s.deps.Watcher.CurrentDisk()
-
 	type response struct {
 		State        disk.DiskState `json:"state"`
 		DiskID       string         `json:"disk_id"`
@@ -18,17 +17,57 @@ func (s *Server) handleDiskStatus(w http.ResponseWriter, r *http.Request) {
 		ActiveTaskID string         `json:"active_task_id,omitempty"`
 	}
 
-	resp := response{
-		State:      info.State,
-		DiskID:     info.DiskID,
-		TotalBytes: info.TotalBytes,
-		FreeBytes:  info.FreeBytes,
-		MountPath:  info.MountPath,
+	disks := s.deps.Watcher.ListDisks()
+	resp := make([]response, 0, len(disks))
+	for _, info := range disks {
+		item := response{
+			State:      info.State,
+			DiskID:     info.DiskID,
+			TotalBytes: info.TotalBytes,
+			FreeBytes:  info.FreeBytes,
+			MountPath:  info.MountPath,
+		}
+		if info.DiskID != "" {
+			if t, ok := s.deps.Tasks.ActiveTaskByDisk(info.DiskID); ok {
+				item.ActiveTaskID = t.ID
+			}
+		}
+		resp = append(resp, item)
 	}
 
-	if t, ok := s.deps.Tasks.ActiveTask(); ok {
-		resp.ActiveTaskID = t.ID
+	jsonOK(w, map[string]any{"items": resp})
+}
+
+func (s *Server) handleDiskInit(w http.ResponseWriter, r *http.Request) {
+	var req struct {
+		MountPath string `json:"mount_path"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		jsonErr(w, http.StatusBadRequest, "invalid JSON: "+err.Error())
+		return
+	}
+
+	info, ok := s.deps.Watcher.DiskByMountPath(req.MountPath)
+	if !ok {
+		jsonErr(w, http.StatusNotFound, "disk not found")
+		return
+	}
+	if info.State == disk.DiskAbsent {
+		jsonErr(w, http.StatusUnprocessableEntity, "no disk connected")
+		return
+	}
+	if info.State == disk.DiskKnown {
+		jsonErr(w, http.StatusConflict, "disk already initialized")
+		return
+	}
+
+	diskID, err := disk.InitDisk(info.MountPath)
+	if err != nil {
+		jsonErr(w, http.StatusInternalServerError, "init disk: "+err.Error())
+		return
 	}
 
-	jsonOK(w, resp)
+	s.deps.OnDiskInit(info.MountPath, diskID)
+	s.deps.Watcher.ProbeNow()
+	jsonOK(w, map[string]string{"disk_id": diskID})
 }