257 lines
7.9 KiB
Go
257 lines
7.9 KiB
Go
// devices.go — CRUD устройств на PostgreSQL.
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//
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// Endpoints:
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//
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// POST /v1/namespaces/{ns}/iot/devices — создать
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// GET /v1/namespaces/{ns}/iot/devices — список (без паролей)
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// GET /v1/namespaces/{ns}/iot/devices/{name} — одно (с паролем)
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// DELETE /v1/namespaces/{ns}/iot/devices/{name} — удалить
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// PATCH /v1/namespaces/{ns}/iot/devices/{name} — enabled
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package handler
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import (
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"crypto/rand"
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"encoding/hex"
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"encoding/json"
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"errors"
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"net/http"
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"strconv"
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"time"
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"gitea.services.ngcloud.ru/Nail/IoT/internal/service/store"
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)
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// iotDeviceCreateRequest — тело POST.
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type iotDeviceCreateRequest struct {
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Name string `json:"name"`
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DeviceID string `json:"device_id"`
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Enabled *bool `json:"enabled"`
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Metadata map[string]string `json:"metadata,omitempty"`
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}
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// iotDeviceUpdateRequest — тело PATCH.
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type iotDeviceUpdateRequest struct {
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Enabled *bool `json:"enabled"`
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}
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// iotDeviceResponse — ответ API. MQTTPassword — только в GET по имени.
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type iotDeviceResponse struct {
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Name string `json:"name"`
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Namespace string `json:"namespace"`
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DeviceID string `json:"device_id"`
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Enabled bool `json:"enabled"`
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Phase string `json:"phase"`
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MQTTUsername string `json:"mqtt_username,omitempty"`
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MQTTPassword string `json:"mqtt_password,omitempty"`
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TopicPrefix string `json:"topic_prefix,omitempty"`
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LastConnected string `json:"last_connected,omitempty"`
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Metadata map[string]string `json:"metadata,omitempty"`
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CreatedAt string `json:"created_at,omitempty"`
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}
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// deviceToResponse конвертирует устройство из БД в ответ API.
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// password отдаётся только если непустая (передаётся явно из Get).
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func deviceToResponse(d *store.Device, password string) iotDeviceResponse {
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resp := iotDeviceResponse{
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Name: d.Name,
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Namespace: d.Namespace,
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DeviceID: d.DeviceID,
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Enabled: d.Enabled,
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Phase: d.Phase,
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MQTTUsername: d.Namespace + "_" + d.DeviceID,
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MQTTPassword: password,
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TopicPrefix: d.Namespace + "/",
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Metadata: d.Metadata,
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}
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if d.LastConnected != nil && !d.LastConnected.IsZero() {
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resp.LastConnected = d.LastConnected.UTC().Format(time.RFC3339)
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}
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if !d.CreatedAt.IsZero() {
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resp.CreatedAt = d.CreatedAt.UTC().Format("2006-01-02 15:04:05 UTC")
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}
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return resp
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}
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// generateMQTTPassword — 32 случайных байта в hex (как старый контроллер).
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// crypto/rand ошибку даёт только при сбое системного PRNG — 3 попытки
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// (ревью 2026-08-16: не возвращать пустой пароль).
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func generateMQTTPassword() (string, error) {
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var lastErr error
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for attempt := 0; attempt < 3; attempt++ {
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buf := make([]byte, 32)
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if _, err := rand.Read(buf); err == nil {
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return hex.EncodeToString(buf), nil
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} else {
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lastErr = err
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}
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}
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return "", lastErr
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}
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// CreateIoTDevice — POST /v1/namespaces/{ns}/iot/devices.
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func (h *Handler) CreateIoTDevice(w http.ResponseWriter, r *http.Request) {
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ns := pathVar(r, "namespace")
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if ns == "" {
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ns = "default"
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}
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var req iotDeviceCreateRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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writeJSON(w, http.StatusBadRequest, errResp("invalid JSON: "+err.Error()))
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return
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}
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if req.Name == "" {
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writeJSON(w, http.StatusBadRequest, errResp("name is required"))
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return
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}
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if req.DeviceID == "" {
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writeJSON(w, http.StatusBadRequest, errResp("device_id is required"))
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return
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}
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enabled := true
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if req.Enabled != nil {
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enabled = *req.Enabled
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}
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password, err := generateMQTTPassword()
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if err != nil {
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h.Log.Error("generate device password", "err", err)
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writeJSON(w, http.StatusInternalServerError, errResp("failed to generate credentials"))
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return
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}
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phase := "Active"
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if !enabled {
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phase = "Disabled"
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}
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device := &store.Device{
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Namespace: ns,
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Name: req.Name,
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DeviceID: req.DeviceID,
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Enabled: enabled,
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MQTTPassword: password,
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Metadata: req.Metadata,
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Phase: phase,
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}
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if err := h.Devices.Create(r.Context(), device); err != nil {
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if errors.Is(err, store.ErrAlreadyExists) {
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writeJSON(w, http.StatusConflict, errResp("iot device already exists"))
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return
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}
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h.Log.Error("create device", "namespace", ns, "name", req.Name, "err", err)
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writeJSON(w, http.StatusInternalServerError, errResp("failed to create device"))
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return
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}
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writeJSON(w, http.StatusCreated, deviceToResponse(device, ""))
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}
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// ListIoTDevices — GET /v1/namespaces/{ns}/iot/devices (без паролей).
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// Пагинация: ?limit=N&offset=M (0 = без ограничения).
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func (h *Handler) ListIoTDevices(w http.ResponseWriter, r *http.Request) {
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ns := pathVar(r, "namespace")
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if ns == "" {
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ns = "default"
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}
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limit, _ := strconv.Atoi(r.URL.Query().Get("limit"))
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offset, _ := strconv.Atoi(r.URL.Query().Get("offset"))
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devices, err := h.Devices.List(r.Context(), ns, limit, offset)
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if err != nil {
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h.Log.Error("list devices", "namespace", ns, "err", err)
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writeJSON(w, http.StatusInternalServerError, errResp("failed to list devices"))
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return
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}
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result := make([]iotDeviceResponse, 0, len(devices))
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for i := range devices {
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result = append(result, deviceToResponse(&devices[i], ""))
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}
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writeJSON(w, http.StatusOK, result)
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}
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// GetIoTDevice — GET /v1/namespaces/{ns}/iot/devices/{name} (с паролем).
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func (h *Handler) GetIoTDevice(w http.ResponseWriter, r *http.Request) {
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ns := pathVar(r, "namespace")
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if ns == "" {
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ns = "default"
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}
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name := pathVar(r, "name")
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device, err := h.Devices.GetByName(r.Context(), ns, name)
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if err != nil {
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if errors.Is(err, store.ErrNotFound) {
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writeJSON(w, http.StatusNotFound, errResp("iot device not found"))
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return
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}
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h.Log.Error("get device", "namespace", ns, "name", name, "err", err)
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writeJSON(w, http.StatusInternalServerError, errResp("failed to get device"))
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return
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}
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writeJSON(w, http.StatusOK, deviceToResponse(device, device.MQTTPassword))
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}
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// DeleteIoTDevice — DELETE /v1/namespaces/{ns}/iot/devices/{name}.
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func (h *Handler) DeleteIoTDevice(w http.ResponseWriter, r *http.Request) {
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ns := pathVar(r, "namespace")
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if ns == "" {
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ns = "default"
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}
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name := pathVar(r, "name")
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err := h.Devices.Delete(r.Context(), ns, name)
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if err != nil {
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if errors.Is(err, store.ErrNotFound) {
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writeJSON(w, http.StatusNotFound, errResp("iot device not found"))
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return
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}
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h.Log.Error("delete device", "namespace", ns, "name", name, "err", err)
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writeJSON(w, http.StatusInternalServerError, errResp("failed to delete device"))
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return
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}
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w.WriteHeader(http.StatusNoContent)
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}
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// UpdateIoTDevice — PATCH /v1/namespaces/{ns}/iot/devices/{name} (enabled).
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func (h *Handler) UpdateIoTDevice(w http.ResponseWriter, r *http.Request) {
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ns := pathVar(r, "namespace")
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if ns == "" {
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ns = "default"
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}
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name := pathVar(r, "name")
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var req iotDeviceUpdateRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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writeJSON(w, http.StatusBadRequest, errResp("invalid JSON: "+err.Error()))
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return
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}
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if req.Enabled == nil {
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writeJSON(w, http.StatusBadRequest, errResp("enabled field is required"))
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return
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}
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err := h.Devices.UpdateEnabled(r.Context(), ns, name, *req.Enabled)
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if err != nil {
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if errors.Is(err, store.ErrNotFound) {
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writeJSON(w, http.StatusNotFound, errResp("iot device not found"))
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return
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}
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h.Log.Error("update device", "namespace", ns, "name", name, "err", err)
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writeJSON(w, http.StatusInternalServerError, errResp("failed to update device"))
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return
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}
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device, err := h.Devices.GetByName(r.Context(), ns, name)
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if err != nil {
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writeJSON(w, http.StatusInternalServerError, errResp("failed to reload device"))
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return
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}
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writeJSON(w, http.StatusOK, deviceToResponse(device, ""))
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}
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