feat(backend): add create user report endpoint

backend/routes/mod/create_report.go

@@ -0,0 +1,58 @@
+package mod
+
+import (
+	"net/http"
+
+	"codeberg.org/u1f320/pronouns.cc/backend/db"
+	"codeberg.org/u1f320/pronouns.cc/backend/log"
+	"codeberg.org/u1f320/pronouns.cc/backend/server"
+	"emperror.dev/errors"
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/render"
+	"github.com/rs/xid"
+)
+
+const MaxReasonLength = 2000
+
+type CreateReportRequest struct {
+	Reason string `json:"reason"`
+}
+
+func (s *Server) createUserReport(w http.ResponseWriter, r *http.Request) error {
+	ctx := r.Context()
+	claims, _ := server.ClaimsFromContext(ctx)
+
+	userID, err := xid.FromString(chi.URLParam(r, "id"))
+	if err != nil {
+		return server.APIError{Code: server.ErrBadRequest, Details: "Invalid user ID"}
+	}
+
+	u, err := s.DB.User(ctx, userID)
+	if err != nil {
+		if err == db.ErrUserNotFound {
+			return server.APIError{Code: server.ErrUserNotFound}
+		}
+
+		log.Errorf("getting user %v: %v", userID, err)
+		return errors.Wrap(err, "getting user")
+	}
+
+	var req CreateReportRequest
+	err = render.Decode(r, &req)
+	if err != nil {
+		return server.APIError{Code: server.ErrBadRequest}
+	}
+
+	if len(req.Reason) > MaxReasonLength {
+		return server.APIError{Code: server.ErrBadRequest, Details: "Reason cannot exceed 2000 characters"}
+	}
+
+	report, err := s.DB.CreateReport(ctx, claims.UserID, u.ID, nil, req.Reason)
+	if err != nil {
+		log.Errorf("creating report for %v: %v", u.ID, err)
+		return errors.Wrap(err, "creating report")
+	}
+
+	render.JSON(w, r, map[string]any{"created": true, "created_at": report.CreatedAt})
+	return nil
+}