dashfolders: stop user locking themselves out of a folder

pkg/api/dashboard_acl.go

@@ -51,6 +51,14 @@ func UpdateDashboardAcl(c *middleware.Context, apiCmd dtos.UpdateDashboardAclCom
 		})
 	}
 
+	if okToUpdate, err := guardian.CheckPermissionBeforeUpdate(m.PERMISSION_ADMIN, cmd.Items); err != nil || !okToUpdate {
+		if err != nil {
+			return ApiError(500, "Error while checking dashboard permissions", err)
+		}
+
+		return ApiError(403, "Cannot remove own admin permission for a folder", nil)
+	}
+
 	if err := bus.Dispatch(&cmd); err != nil {
 		if err == m.ErrDashboardAclInfoMissing || err == m.ErrDashboardPermissionDashboardEmpty {
 			return ApiError(409, err.Error(), err)
@@ -70,6 +78,14 @@ func DeleteDashboardAcl(c *middleware.Context) Response {
 		return dashboardGuardianResponse(err)
 	}
 
+	if okToDelete, err := guardian.CheckPermissionBeforeRemove(m.PERMISSION_ADMIN, aclId); err != nil || !okToDelete {
+		if err != nil {
+			return ApiError(500, "Error while checking dashboard permissions", err)
+		}
+
+		return ApiError(403, "Cannot remove own admin permission for a folder", nil)
+	}
+
 	cmd := m.RemoveDashboardAclCommand{OrgId: c.OrgId, AclId: aclId}
 	if err := bus.Dispatch(&cmd); err != nil {
 		return ApiError(500, "Failed to delete permission for user", err)

pkg/api/dashboard_acl_test.go

 package api
 
 import (
+	"path/filepath"
 	"testing"
 
+	"github.com/go-macaron/session"
+	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/components/simplejson"
+	"github.com/grafana/grafana/pkg/middleware"
 	m "github.com/grafana/grafana/pkg/models"
+	macaron "gopkg.in/macaron.v1"
 
 	. "github.com/smartystreets/goconvey/convey"
 )
@@ -56,7 +61,7 @@ func TestDashboardAclApiEndpoint(t *testing.T) {
 
 		Convey("When user is editor and has admin permission in the ACL", func() {
 			loggedInUserScenarioWithRole("When calling GET on", "GET", "/api/dashboards/id/1/acl", "/api/dashboards/id/:dashboardId/acl", m.ROLE_EDITOR, func(sc *scenarioContext) {
-				mockResult = append(mockResult, &m.DashboardAclInfoDTO{Id: 1, OrgId: 1, DashboardId: 1, UserId: 1, Permission: m.PERMISSION_ADMIN})
+				mockResult = append(mockResult, &m.DashboardAclInfoDTO{Id: 6, OrgId: 1, DashboardId: 1, UserId: 1, Permission: m.PERMISSION_ADMIN})
 
 				Convey("Should be able to access ACL", func() {
 					sc.handlerFunc = GetDashboardAclList
@@ -67,7 +72,7 @@ func TestDashboardAclApiEndpoint(t *testing.T) {
 			})
 
 			loggedInUserScenarioWithRole("When calling DELETE on", "DELETE", "/api/dashboards/id/1/acl/1", "/api/dashboards/id/:dashboardId/acl/:aclId", m.ROLE_EDITOR, func(sc *scenarioContext) {
-				mockResult = append(mockResult, &m.DashboardAclInfoDTO{Id: 1, OrgId: 1, DashboardId: 1, UserId: 1, Permission: m.PERMISSION_ADMIN})
+				mockResult = append(mockResult, &m.DashboardAclInfoDTO{Id: 6, OrgId: 1, DashboardId: 1, UserId: 1, Permission: m.PERMISSION_ADMIN})
 
 				bus.AddHandler("test3", func(cmd *m.RemoveDashboardAclCommand) error {
 					return nil
@@ -81,6 +86,52 @@ func TestDashboardAclApiEndpoint(t *testing.T) {
 				})
 			})
 
+			loggedInUserScenarioWithRole("When calling DELETE on", "DELETE", "/api/dashboards/id/1/acl/6", "/api/dashboards/id/:dashboardId/acl/:aclId", m.ROLE_EDITOR, func(sc *scenarioContext) {
+				mockResult = append(mockResult, &m.DashboardAclInfoDTO{Id: 6, OrgId: 1, DashboardId: 1, UserId: 1, Permission: m.PERMISSION_ADMIN})
+
+				bus.AddHandler("test3", func(cmd *m.RemoveDashboardAclCommand) error {
+					return nil
+				})
+
+				Convey("Should not be able to delete their own Admin permission", func() {
+					sc.handlerFunc = DeleteDashboardAcl
+					sc.fakeReqWithParams("DELETE", sc.url, map[string]string{}).exec()
+
+					So(sc.resp.Code, ShouldEqual, 403)
+				})
+			})
+
+			Convey("Should not be able to downgrade their own Admin permission", func() {
+				cmd := dtos.UpdateDashboardAclCommand{
+					Items: []dtos.DashboardAclUpdateItem{
+						{UserId: TestUserID, Permission: m.PERMISSION_EDIT},
+					},
+				}
+
+				postAclScenario("When calling POST on", "/api/dashboards/id/1/acl", "/api/dashboards/id/:dashboardId/acl", m.ROLE_EDITOR, cmd, func(sc *scenarioContext) {
+					mockResult = append(mockResult, &m.DashboardAclInfoDTO{Id: 6, OrgId: 1, DashboardId: 1, UserId: 1, Permission: m.PERMISSION_ADMIN})
+
+					CallPostAcl(sc)
+					So(sc.resp.Code, ShouldEqual, 403)
+				})
+			})
+
+			Convey("Should be able to update permissions", func() {
+				cmd := dtos.UpdateDashboardAclCommand{
+					Items: []dtos.DashboardAclUpdateItem{
+						{UserId: TestUserID, Permission: m.PERMISSION_ADMIN},
+						{UserId: 2, Permission: m.PERMISSION_EDIT},
+					},
+				}
+
+				postAclScenario("When calling POST on", "/api/dashboards/id/1/acl", "/api/dashboards/id/:dashboardId/acl", m.ROLE_EDITOR, cmd, func(sc *scenarioContext) {
+					mockResult = append(mockResult, &m.DashboardAclInfoDTO{Id: 6, OrgId: 1, DashboardId: 1, UserId: 1, Permission: m.PERMISSION_ADMIN})
+
+					CallPostAcl(sc)
+					So(sc.resp.Code, ShouldEqual, 200)
+				})
+			})
+
 			Convey("When user is a member of a team in the ACL with admin permission", func() {
 				loggedInUserScenarioWithRole("When calling DELETE on", "DELETE", "/api/dashboards/id/1/acl/1", "/api/dashboards/id/:dashboardsId/acl/:aclId", m.ROLE_EDITOR, func(sc *scenarioContext) {
 					teamResp = append(teamResp, &m.Team{Id: 2, OrgId: 1, Name: "UG2"})
@@ -172,3 +223,44 @@ func transformDashboardAclsToDTOs(acls []*m.DashboardAclInfoDTO) []*m.DashboardA
 
 	return dtos
 }
+
+func CallPostAcl(sc *scenarioContext) {
+	bus.AddHandler("test", func(cmd *m.UpdateDashboardAclCommand) error {
+		return nil
+	})
+
+	sc.fakeReqWithParams("POST", sc.url, map[string]string{}).exec()
+}
+
+func postAclScenario(desc string, url string, routePattern string, role m.RoleType, cmd dtos.UpdateDashboardAclCommand, fn scenarioFunc) {
+	Convey(desc+" "+url, func() {
+		defer bus.ClearBusHandlers()
+
+		sc := &scenarioContext{
+			url: url,
+		}
+		viewsPath, _ := filepath.Abs("../../public/views")
+
+		sc.m = macaron.New()
+		sc.m.Use(macaron.Renderer(macaron.RenderOptions{
+			Directory: viewsPath,
+			Delims:    macaron.Delims{Left: "[[", Right: "]]"},
+		}))
+
+		sc.m.Use(middleware.GetContextHandler())
+		sc.m.Use(middleware.Sessioner(&session.Options{}))
+
+		sc.defaultHandler = wrap(func(c *middleware.Context) Response {
+			sc.context = c
+			sc.context.UserId = TestUserID
+			sc.context.OrgId = TestOrgID
+			sc.context.OrgRole = role
+
+			return UpdateDashboardAcl(c, cmd)
+		})
+
+		sc.m.Post(routePattern, sc.defaultHandler)
+
+		fn(sc)
+	})
+}

pkg/services/guardian/guardian.go

@@ -55,6 +55,10 @@ func (g *DashboardGuardian) HasPermission(permission m.PermissionType) (bool, er
 		return false, err
 	}
 
+	return g.checkAcl(permission, acl)
+}
+
+func (g *DashboardGuardian) checkAcl(permission m.PermissionType, acl []*m.DashboardAclInfoDTO) (bool, error) {
 	orgRole := g.user.OrgRole
 	teamAclItems := []*m.DashboardAclInfoDTO{}
 
@@ -102,6 +106,40 @@ func (g *DashboardGuardian) HasPermission(permission m.PermissionType) (bool, er
 	return false, nil
 }
 
+func (g *DashboardGuardian) CheckPermissionBeforeRemove(permission m.PermissionType, aclIdToRemove int64) (bool, error) {
+	if g.user.OrgRole == m.ROLE_ADMIN {
+		return true, nil
+	}
+
+	acl, err := g.GetAcl()
+	if err != nil {
+		return false, err
+	}
+
+	for i, p := range acl {
+		if p.Id == aclIdToRemove {
+			acl = append(acl[:i], acl[i+1:]...)
+			break
+		}
+	}
+
+	return g.checkAcl(permission, acl)
+}
+
+func (g *DashboardGuardian) CheckPermissionBeforeUpdate(permission m.PermissionType, updatePermissions []*m.DashboardAcl) (bool, error) {
+	if g.user.OrgRole == m.ROLE_ADMIN {
+		return true, nil
+	}
+
+	acl := []*m.DashboardAclInfoDTO{}
+
+	for _, p := range updatePermissions {
+		acl = append(acl, &m.DashboardAclInfoDTO{UserId: p.UserId, TeamId: p.TeamId, Role: p.Role, Permission: p.Permission})
+	}
+
+	return g.checkAcl(permission, acl)
+}
+
 // Returns dashboard acl
 func (g *DashboardGuardian) GetAcl() ([]*m.DashboardAclInfoDTO, error) {
 	if g.acl != nil {