Implement account deactivation (#1455)

* Implement account deactivation

See #610
Signed-off-by: Loïck Bonniot <git@lesterpig.com>

* Rename 'is_active' to 'is_deactivated'

Signed-off-by: Loïck Bonniot <git@lesterpig.com>

Co-authored-by: Kegsay <kegan@matrix.org>

clientapi/routing/deactivate.go

@@ -0,0 +1,55 @@
+package routing
+
+import (
+	"io/ioutil"
+	"net/http"
+
+	"github.com/matrix-org/dendrite/clientapi/auth"
+	"github.com/matrix-org/dendrite/clientapi/jsonerror"
+	"github.com/matrix-org/dendrite/userapi/api"
+	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/matrix-org/util"
+)
+
+// Deactivate handles POST requests to /account/deactivate
+func Deactivate(
+	req *http.Request,
+	userInteractiveAuth *auth.UserInteractive,
+	userAPI api.UserInternalAPI,
+	deviceAPI *api.Device,
+) util.JSONResponse {
+	ctx := req.Context()
+	defer req.Body.Close() // nolint:errcheck
+	bodyBytes, err := ioutil.ReadAll(req.Body)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			JSON: jsonerror.BadJSON("The request body could not be read: " + err.Error()),
+		}
+	}
+
+	login, errRes := userInteractiveAuth.Verify(ctx, bodyBytes, deviceAPI)
+	if errRes != nil {
+		return *errRes
+	}
+
+	localpart, _, err := gomatrixserverlib.SplitID('@', login.User)
+	if err != nil {
+		util.GetLogger(req.Context()).WithError(err).Error("gomatrixserverlib.SplitID failed")
+		return jsonerror.InternalServerError()
+	}
+
+	var res api.PerformAccountDeactivationResponse
+	err = userAPI.PerformAccountDeactivation(ctx, &api.PerformAccountDeactivationRequest{
+		Localpart: localpart,
+	}, &res)
+	if err != nil {
+		util.GetLogger(ctx).WithError(err).Error("userAPI.PerformAccountDeactivation failed")
+		return jsonerror.InternalServerError()
+	}
+
+	return util.JSONResponse{
+		Code: http.StatusOK,
+		JSON: struct{}{},
+	}
+}

clientapi/routing/routing.go

@@ -435,6 +435,15 @@ func Setup(
 		}),
 	).Methods(http.MethodPost, http.MethodOptions)
 
+	r0mux.Handle("/account/deactivate",
+		httputil.MakeAuthAPI("deactivate", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse {
+			if r := rateLimits.rateLimit(req); r != nil {
+				return *r
+			}
+			return Deactivate(req, userInteractiveAuth, userAPI, device)
+		}),
+	).Methods(http.MethodPost, http.MethodOptions)
+
 	// Stub endpoints required by Riot
 
 	r0mux.Handle("/login",