feat(PROJ-9): implement labels backend - DB schema, labelstore, API handlers, Xapian integration

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-18 08:32:30 +01:00
parent bd09992441
commit 5a6289c83d
8 changed files with 995 additions and 2 deletions
@@ -0,0 +1,407 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"strconv"
+
+	"github.com/archivmail/internal/auth"
+	"github.com/archivmail/internal/labelstore"
+)
+
+// ── PROJ-9: Labels API Handlers ───────────────────────────────────────────
+
+// SetLabels wires the label store into the API server and registers label routes.
+func (s *Server) SetLabels(store *labelstore.Store) {
+	s.labels = store
+
+	// User label routes (all authenticated users)
+	s.mux.HandleFunc("GET /api/labels", s.auth(s.handleGetLabels))
+	s.mux.HandleFunc("POST /api/labels", s.auth(s.handleCreateLabel))
+	s.mux.HandleFunc("PATCH /api/labels/{id}", s.auth(s.handleUpdateLabel))
+	s.mux.HandleFunc("DELETE /api/labels/{id}", s.auth(s.handleDeleteLabel))
+
+	// Email-label assignment routes
+	s.mux.HandleFunc("POST /api/mails/{id}/labels", s.auth(s.handleAssignLabel))
+	s.mux.HandleFunc("DELETE /api/mails/{id}/labels/{label_id}", s.auth(s.handleRemoveLabel))
+
+	// Admin label routes (domain_admin and above)
+	s.mux.HandleFunc("POST /api/admin/labels", s.authAdmin(s.handleAdminCreateLabel))
+	s.mux.HandleFunc("GET /api/admin/label-rules", s.authAdmin(s.handleGetLabelRules))
+	s.mux.HandleFunc("POST /api/admin/label-rules", s.authAdmin(s.handleCreateLabelRule))
+	s.mux.HandleFunc("DELETE /api/admin/label-rules/{id}", s.authAdmin(s.handleDeleteLabelRule))
+}
+
+// handleGetLabels returns labels visible to the authenticated user
+// (own labels + global/admin labels for their tenant).
+// GET /api/labels
+func (s *Server) handleGetLabels(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+	if sess.UserID == 0 {
+		writeError(w, http.StatusUnauthorized, "not authenticated")
+		return
+	}
+
+	tenantID := s.labelTenantID(sess)
+	labels, err := s.labels.GetLabelsForUser(r.Context(), sess.UserID, tenantID)
+	if err != nil {
+		s.logger.Error("get labels failed", "err", err, "user_id", sess.UserID)
+		writeError(w, http.StatusInternalServerError, "failed to load labels")
+		return
+	}
+	if labels == nil {
+		labels = []labelstore.Label{}
+	}
+	writeJSON(w, http.StatusOK, labels)
+}
+
+// handleCreateLabel creates a user-owned label.
+// POST /api/labels
+func (s *Server) handleCreateLabel(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+	if sess.UserID == 0 {
+		writeError(w, http.StatusUnauthorized, "not authenticated")
+		return
+	}
+
+	var req struct {
+		Name  string `json:"name"`
+		Color string `json:"color"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+	if req.Name == "" {
+		writeError(w, http.StatusBadRequest, "name is required")
+		return
+	}
+	if req.Color == "" {
+		req.Color = "#6366f1"
+	}
+	if !isValidColor(req.Color) {
+		writeError(w, http.StatusBadRequest, "invalid color format")
+		return
+	}
+
+	tenantID := s.labelTenantID(sess)
+	ownerID := sess.UserID
+	label, err := s.labels.CreateLabel(r.Context(), req.Name, req.Color, &ownerID, tenantID)
+	if err != nil {
+		s.logger.Error("create label failed", "err", err, "user_id", sess.UserID)
+		writeError(w, http.StatusInternalServerError, "failed to create label")
+		return
+	}
+	writeJSON(w, http.StatusCreated, label)
+}
+
+// handleUpdateLabel updates a user's own label.
+// PATCH /api/labels/{id}
+func (s *Server) handleUpdateLabel(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+	if sess.UserID == 0 {
+		writeError(w, http.StatusUnauthorized, "not authenticated")
+		return
+	}
+
+	labelID, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid label id")
+		return
+	}
+
+	var req struct {
+		Name  string `json:"name"`
+		Color string `json:"color"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+	if req.Name == "" {
+		writeError(w, http.StatusBadRequest, "name is required")
+		return
+	}
+	if req.Color == "" {
+		req.Color = "#6366f1"
+	}
+	if !isValidColor(req.Color) {
+		writeError(w, http.StatusBadRequest, "invalid color format")
+		return
+	}
+
+	if err := s.labels.UpdateLabel(r.Context(), labelID, req.Name, req.Color, sess.UserID); err != nil {
+		s.logger.Error("update label failed", "err", err, "label_id", labelID, "user_id", sess.UserID)
+		writeError(w, http.StatusNotFound, "label not found")
+		return
+	}
+	writeJSON(w, http.StatusOK, map[string]bool{"ok": true})
+}
+
+// handleDeleteLabel deletes a user's own label.
+// DELETE /api/labels/{id}
+func (s *Server) handleDeleteLabel(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+	if sess.UserID == 0 {
+		writeError(w, http.StatusUnauthorized, "not authenticated")
+		return
+	}
+
+	labelID, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid label id")
+		return
+	}
+
+	if err := s.labels.DeleteLabel(r.Context(), labelID, sess.UserID); err != nil {
+		s.logger.Error("delete label failed", "err", err, "label_id", labelID, "user_id", sess.UserID)
+		writeError(w, http.StatusNotFound, "label not found")
+		return
+	}
+	writeJSON(w, http.StatusOK, map[string]bool{"ok": true})
+}
+
+// handleAssignLabel assigns a label to an email.
+// POST /api/mails/{id}/labels
+func (s *Server) handleAssignLabel(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+	if sess.UserID == 0 {
+		writeError(w, http.StatusUnauthorized, "not authenticated")
+		return
+	}
+
+	mailID := r.PathValue("id")
+	// SEC-22: Validate mail ID format to prevent path traversal.
+	if !isValidMailID(mailID) {
+		writeError(w, http.StatusBadRequest, "invalid mail id")
+		return
+	}
+
+	var req struct {
+		LabelID int64 `json:"label_id"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+	if req.LabelID <= 0 {
+		writeError(w, http.StatusBadRequest, "label_id is required")
+		return
+	}
+
+	if err := s.labels.AssignLabel(r.Context(), mailID, req.LabelID, "user"); err != nil {
+		s.logger.Error("assign label failed", "err", err, "mail_id", mailID, "label_id", req.LabelID)
+		writeError(w, http.StatusInternalServerError, "failed to assign label")
+		return
+	}
+	writeJSON(w, http.StatusOK, map[string]bool{"ok": true})
+}
+
+// handleRemoveLabel removes a label assignment from an email.
+// DELETE /api/mails/{id}/labels/{label_id}
+func (s *Server) handleRemoveLabel(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+	if sess.UserID == 0 {
+		writeError(w, http.StatusUnauthorized, "not authenticated")
+		return
+	}
+
+	mailID := r.PathValue("id")
+	// SEC-22: Validate mail ID format to prevent path traversal.
+	if !isValidMailID(mailID) {
+		writeError(w, http.StatusBadRequest, "invalid mail id")
+		return
+	}
+
+	labelID, err := strconv.ParseInt(r.PathValue("label_id"), 10, 64)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid label id")
+		return
+	}
+
+	if err := s.labels.RemoveLabel(r.Context(), mailID, labelID); err != nil {
+		s.logger.Error("remove label failed", "err", err, "mail_id", mailID, "label_id", labelID)
+		writeError(w, http.StatusInternalServerError, "failed to remove label")
+		return
+	}
+	writeJSON(w, http.StatusOK, map[string]bool{"ok": true})
+}
+
+// ── Admin Label Handlers ──────────────────────────────────────────────────
+
+// handleAdminCreateLabel creates a global label (no owner) for a tenant.
+// POST /api/admin/labels
+func (s *Server) handleAdminCreateLabel(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+
+	var req struct {
+		Name  string `json:"name"`
+		Color string `json:"color"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+	if req.Name == "" {
+		writeError(w, http.StatusBadRequest, "name is required")
+		return
+	}
+	if req.Color == "" {
+		req.Color = "#6366f1"
+	}
+	if !isValidColor(req.Color) {
+		writeError(w, http.StatusBadRequest, "invalid color format")
+		return
+	}
+
+	tenantID := s.labelTenantID(sess)
+	label, err := s.labels.CreateAdminLabel(r.Context(), req.Name, req.Color, tenantID)
+	if err != nil {
+		s.logger.Error("admin create label failed", "err", err)
+		writeError(w, http.StatusInternalServerError, "failed to create label")
+		return
+	}
+	writeJSON(w, http.StatusCreated, label)
+}
+
+// handleGetLabelRules returns all auto-label rules for the admin's tenant.
+// GET /api/admin/label-rules
+func (s *Server) handleGetLabelRules(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+	tenantID := s.labelTenantID(sess)
+
+	rules, err := s.labels.GetLabelRules(r.Context(), tenantID)
+	if err != nil {
+		s.logger.Error("get label rules failed", "err", err)
+		writeError(w, http.StatusInternalServerError, "failed to load label rules")
+		return
+	}
+	if rules == nil {
+		rules = []labelstore.LabelRule{}
+	}
+	writeJSON(w, http.StatusOK, rules)
+}
+
+// handleCreateLabelRule creates an auto-label rule.
+// POST /api/admin/label-rules
+func (s *Server) handleCreateLabelRule(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+
+	var req struct {
+		ConditionField string `json:"condition_field"`
+		ConditionValue string `json:"condition_value"`
+		LabelID        int64  `json:"label_id"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+	if req.ConditionField == "" || req.ConditionValue == "" || req.LabelID <= 0 {
+		writeError(w, http.StatusBadRequest, "condition_field, condition_value, and label_id are required")
+		return
+	}
+
+	// Validate allowed condition fields.
+	allowed := map[string]bool{
+		"from": true, "to": true, "subject": true, "domain": true,
+		"has_attachment": true,
+	}
+	if !allowed[req.ConditionField] {
+		writeError(w, http.StatusBadRequest, "invalid condition_field")
+		return
+	}
+
+	tenantID := s.labelTenantID(sess)
+	rule, err := s.labels.CreateLabelRule(r.Context(), req.ConditionField, req.ConditionValue, req.LabelID, tenantID)
+	if err != nil {
+		s.logger.Error("create label rule failed", "err", err)
+		writeError(w, http.StatusInternalServerError, "failed to create label rule")
+		return
+	}
+	writeJSON(w, http.StatusCreated, rule)
+}
+
+// handleDeleteLabelRule deletes an auto-label rule.
+// DELETE /api/admin/label-rules/{id}
+func (s *Server) handleDeleteLabelRule(w http.ResponseWriter, r *http.Request) {
+	if s.labels == nil {
+		writeError(w, http.StatusServiceUnavailable, "labels not available")
+		return
+	}
+	sess := sessionFromCtx(r.Context())
+
+	ruleID, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid rule id")
+		return
+	}
+
+	tenantID := s.labelTenantID(sess)
+	if err := s.labels.DeleteLabelRule(r.Context(), ruleID, tenantID); err != nil {
+		s.logger.Error("delete label rule failed", "err", err, "rule_id", ruleID)
+		writeError(w, http.StatusNotFound, "rule not found")
+		return
+	}
+	writeJSON(w, http.StatusOK, map[string]bool{"ok": true})
+}
+
+// ── Helpers ───────────────────────────────────────────────────────────────
+
+// labelTenantID extracts the tenant ID from the session for label operations.
+// Superadmins without a tenant get tenant_id=0 (global context).
+func (s *Server) labelTenantID(sess *auth.Session) int64 {
+	if sess.TenantID != nil {
+		return *sess.TenantID
+	}
+	return 0
+}
+
+// isValidColor validates a hex color string like "#6366f1".
+func isValidColor(c string) bool {
+	if len(c) != 7 || c[0] != '#' {
+		return false
+	}
+	for _, b := range c[1:] {
+		if !((b >= '0' && b <= '9') || (b >= 'a' && b <= 'f') || (b >= 'A' && b <= 'F')) {
+			return false
+		}
+	}
+	return true
+}
+