Redirect to dashboard listing page when panel data can not be migrate…

…d. (elastic#17394)

* throw exeception when unable to migrate panel data

* catch migrate exception and show toast

* remove unneeded conversion to string

* fix jest test

* use forEach instead of map

* fix jest tests

* move toast and window.location change to constructor

src/core_plugins/kibana/public/dashboard/grid/dashboard_grid.js

@@ -7,7 +7,9 @@ import classNames from 'classnames';
 import { PanelUtils } from '../panel/panel_utils';
 import { DashboardViewMode } from '../dashboard_view_mode';
 import { DashboardPanel } from '../panel';
+import { toastNotifications } from 'ui/notify';
 import {
+  DashboardConstants,
   DASHBOARD_GRID_COLUMN_COUNT,
   DASHBOARD_GRID_HEIGHT,
 } from '../dashboard_constants';
@@ -87,10 +89,25 @@ export class DashboardGrid extends React.Component {
     // A mapping of panelIndexes to grid items so we can set the zIndex appropriately on the last focused
     // item.
     this.gridItems = {};
+
+    let isLayoutInvalid = false;
+    let layout;
+    try {
+      layout = this.buildLayoutFromPanels();
+    } catch (error) {
+      isLayoutInvalid = true;
+      toastNotifications.addDanger({
+        title: 'Unable to load dashboard.',
+        text: error.message,
+      });
+      window.location = `#${DashboardConstants.LANDING_PAGE_PATH}`;
+    }
     this.state = {
       focusedPanelIndex: undefined,
-      layout: this.buildLayoutFromPanels()
+      layout,
+      isLayoutInvalid,
     };
+
     // A mapping of panel type to embeddable handlers. Because this function reaches out of react and into angular,
     // if done in the render method, it appears to be triggering a scope.apply, which appears to be trigging a setState
     // call inside TSVB visualizations.  Moving the function out of render appears to fix the issue.  See
@@ -200,6 +217,10 @@ export class DashboardGrid extends React.Component {
   }
 
   render() {
+    if (this.state.isLayoutInvalid) {
+      return null;
+    }
+
     const { dashboardViewMode, maximizedPanelId, useMargins } = this.props;
     const isViewMode = dashboardViewMode === DashboardViewMode.VIEW;
     return (

src/core_plugins/kibana/public/dashboard/grid/dashboard_grid.test.js

@@ -10,6 +10,12 @@ import { DashboardGrid } from './dashboard_grid';
 
 jest.mock('ui/chrome', () => ({ getKibanaVersion: () => '6.0.0' }), { virtual: true });
 
+jest.mock('ui/notify',
+  () => ({
+    toastNotifications: {
+      addDanger: () => {},
+    }
+  }), { virtual: true });
 
 function getProps(props = {}) {
   const defaultTestProps = {

src/core_plugins/kibana/public/dashboard/grid/dashboard_grid_container.test.js

@@ -12,6 +12,13 @@ import { updatePanels } from '../actions';
 
 jest.mock('ui/chrome', () => ({ getKibanaVersion: () => '6.3.0' }), { virtual: true });
 
+jest.mock('ui/notify',
+  () => ({
+    toastNotifications: {
+      addDanger: () => {},
+    }
+  }), { virtual: true });
+
 function getProps(props = {}) {
   const defaultTestProps = {
     hidden: false,

src/core_plugins/kibana/public/dashboard/panel/panel_utils.js

@@ -1,3 +1,4 @@
+import _ from 'lodash';
 import { DEFAULT_PANEL_WIDTH, DEFAULT_PANEL_HEIGHT } from '../dashboard_constants';
 import chrome from 'ui/chrome';
 
@@ -8,6 +9,12 @@ export class PanelUtils {
 
   // 6.1 switched from gridster to react grid. React grid uses different variables for tracking layout
   static convertPanelDataPre_6_1(panel) { // eslint-disable-line camelcase
+    ['col', 'row'].forEach(key => {
+      if (!_.has(panel, key)) {
+        throw new Error(`Unable to migrate panel data for "6.1.0" backwards compatibility, panel does not contain expected field: ${key}`);
+      }
+    });
+
     panel.gridData = {
       x: panel.col - 1,
       y: panel.row - 1,
@@ -30,6 +37,12 @@ export class PanelUtils {
   // 2) increase rows from 12 to 48
   // Need to scale pre 6.3 panels so they maintain the same layout
   static convertPanelDataPre_6_3(panel) { // eslint-disable-line camelcase
+    ['w', 'x', 'h', 'y'].forEach(key => {
+      if (!_.has(panel.gridData, key)) {
+        throw new Error(`Unable to migrate panel data for "6.3.0" backwards compatibility, panel does not contain expected field: ${key}`);
+      }
+    });
+
     panel.gridData.w = panel.gridData.w * PANEL_WIDTH_SCALE_FACTOR;
     panel.gridData.x = panel.gridData.x * PANEL_WIDTH_SCALE_FACTOR;
     panel.gridData.h = panel.gridData.h * PANEL_HEIGHT_SCALE_FACTOR;