Guard against manifests without sequences

src/components/ViewerInfo.js

@@ -18,6 +18,8 @@ export class ViewerInfo extends Component {
       t,
     } = this.props;
 
+    if (canvasCount === 0) return '';
+
     return (
       <div className={classNames(ns('osd-info'), classes.osdInfo)}>
         <Typography display="inline" variant="caption" className={ns('canvas-count')}>

src/state/selectors/canvases.js

@@ -6,7 +6,7 @@ import { getWindow, getWindowViewType } from './windows';
 
 export const getCanvases = createSelector(
   [getManifestoInstance],
-  manifest => manifest && manifest.getSequences()[0].getCanvases(),
+  manifest => manifest && manifest.getSequences()[0] && manifest.getSequences()[0].getCanvases(),
 );
 
 /**
@@ -24,7 +24,7 @@ export const getCanvas = createSelector(
     (state, { canvasId }) => canvasId,
   ],
   (manifest, canvasIndex, canvasId) => {
-    if (!manifest) return undefined;
+    if (!manifest || !manifest.getSequences()[0]) return undefined;
 
     if (canvasId !== undefined) return manifest.getSequences()[0].getCanvasById(canvasId);
     return manifest.getSequences()[0].getCanvasByIndex(canvasIndex);
@@ -37,7 +37,7 @@ export const getCurrentCanvas = createSelector(
     getWindow,
   ],
   (manifest, window) => {
-    if (!manifest || !window) return undefined;
+    if (!manifest || !window || !manifest.getSequences()[0]) return undefined;
 
     if (!window.canvasId) return manifest.getSequences()[0].getCanvasByIndex(0);
 

src/state/selectors/manifests.js

@@ -376,7 +376,7 @@ export function getManifestStartCanvas(json, canvasIndexFromState) {
 
   const manifest = createManifestoInstance(json);
 
-  if (!manifest) return {};
+  if (!manifest || !manifest.getSequences()[0]) return {};
 
   if (canvasIndexFromState !== undefined) {
     return manifest.getSequences()[0].getCanvasByIndex(canvasIndexFromState);
@@ -421,8 +421,9 @@ export const getManifestViewingDirection = createSelector(
   [getManifestoInstance],
   (manifest) => {
     if (!manifest) return null;
-    const viewingDirection = manifest.getSequences()[0].getViewingDirection()
-      || manifest.getViewingDirection();
+    const viewingDirection = (
+      manifest.getSequences()[0] && manifest.getSequences()[0].getViewingDirection()
+    ) || manifest.getViewingDirection();
     if (viewingDirection) return viewingDirection.value;
     return null;
   },