OHIF-2526: Display warning messages if fails to parse sr report

platform/core/src/DICOMSR/parseDicomStructuredReport.js

@@ -1,7 +1,10 @@
 import dcmjs from 'dcmjs';
+import classes from '../classes';
 
 import findInstanceMetadataBySopInstanceUID from './utils/findInstanceMetadataBySopInstanceUid';
 
+const { LogManager } = classes;
+
 /**
  * Function to parse the part10 array buffer that comes from a DICOM Structured report into measurementData
  * measurementData format is a viewer specific format to be stored into the redux and consumed by other components
@@ -20,9 +23,21 @@ const parseDicomStructuredReport = (part10SRArrayBuffer, displaySets) => {
   );
 
   const { MeasurementReport } = dcmjs.adapters.Cornerstone;
-  const storedMeasurementByToolType = MeasurementReport.generateToolState(
-    dataset
-  );
+
+  let storedMeasurementByToolType;
+  try {
+    storedMeasurementByToolType = MeasurementReport.generateToolState(dataset);
+  } catch (error) {
+    const seriesDescription = dataset.SeriesDescription || '';
+    LogManager.publish(LogManager.EVENTS.OnLog, {
+      title: `Failed to parse ${seriesDescription} measurement report`,
+      type: 'warning',
+      message: error.message || '',
+      notify: true,
+    });
+    return;
+  }
+
   const measurementData = {};
   let measurementNumber = 0;
 

platform/core/src/classes/LogManager.js

@@ -0,0 +1,18 @@
+import PubSub from './PubSub';
+
+/** Log Events */
+export const LogEvents = Object.freeze({
+  OnLog: 'onLog',
+});
+
+/**
+ * Log manager that implements pub/sub.
+ * This manager can be used to send logs across different packages
+ * using previously registered events.
+ */
+class LogManager extends PubSub {
+  EVENTS = LogEvents;
+}
+
+/** Singleton */
+export default new LogManager();

platform/core/src/classes/PubSub.js

@@ -0,0 +1,75 @@
+const _subscriptions = Symbol('subscriptions');
+const _lastSubscriptionId = Symbol('lastSubscriptionId');
+
+/**
+ * Class to implement publish/subscribe pattern
+ *
+ * @class
+ * @classdesc Pub/sub mechanism
+ */
+export default class PubSub {
+  constructor() {
+    this[_subscriptions] = {};
+    this[_lastSubscriptionId] = 0;
+  }
+
+  /**
+   * Subscribe to event
+   *
+   * @param {string} eventName Event name
+   * @param {Function} callback Callback function
+   * @returns {void}
+   */
+  subscribe(eventName, callback) {
+    if (eventName === undefined) {
+      throw new Error('Event name is required');
+    }
+
+    if (typeof callback !== 'function') {
+      throw new Error('Callback must be a function');
+    }
+
+    if (!this[_subscriptions].hasOwnProperty(eventName)) {
+      this[_subscriptions][eventName] = {};
+    }
+
+    const subscriptionId = `sub${this[_lastSubscriptionId]++}`;
+    this[_subscriptions][eventName][subscriptionId] = callback;
+  }
+
+  /**
+   * Removes a subscription
+   *
+   * @param {string} eventName Event name
+   * @param {Function} [callback] Callback function
+   * @returns {void}
+   */
+  unsubscribe(eventName, callback) {
+    const callbacks = this[_subscriptions][eventName] || {};
+    for (let subscriptionId in callbacks) {
+      if (!callback) {
+        delete callbacks[subscriptionId];
+      } else if (callbacks[subscriptionId] === callback) {
+        delete callbacks[subscriptionId];
+      }
+    }
+  }
+
+  /**
+   * Publish event to all subscriptions
+   *
+   * @param {String} eventName Event name
+   * @param {any} [payload] Data that will be published
+   * @returns {void}
+   */
+  publish(eventName, ...payload) {
+    if (eventName === undefined) {
+      throw new Error('Event name is required');
+    }
+
+    const callbacks = this[_subscriptions][eventName] || {};
+    for (let subscriptionId in callbacks) {
+      callbacks[subscriptionId](...payload);
+    }
+  }
+}

platform/core/src/classes/index.js

@@ -4,6 +4,8 @@ import CommandsManager from './CommandsManager.js';
 import { DICOMFileLoadingListener } from './StudyLoadingListener';
 import HotkeysManager from './HotkeysManager.js';
 import ImageSet from './ImageSet';
+import LogManager from './LogManager';
+import PubSub from './PubSub';
 import MetadataProvider from './MetadataProvider';
 import OHIFError from './OHIFError.js';
 import { OHIFStudyMetadataSource } from './OHIFStudyMetadataSource';
@@ -36,7 +38,9 @@ const classes = {
   MetadataProvider,
   CommandsManager,
   HotkeysManager,
+  LogManager,
   ImageSet,
+  PubSub,
   StudyPrefetcher,
   StudyLoadingListener,
   StackLoadingListener,

platform/ui/src/contextProviders/SnackbarProvider.js

@@ -6,10 +6,13 @@ import React, {
   useEffect,
 } from 'react';
 import PropTypes from 'prop-types';
+import { classes } from '@ohif/core';
 
 import SnackbarContainer from '../components/snackbar/SnackbarContainer';
 import SnackbarTypes from '../components/snackbar/SnackbarTypes';
 
+const { LogManager } = classes;
+
 const SnackbarContext = createContext(null);
 
 export const useSnackbarContext = () => useContext(SnackbarContext);
@@ -28,6 +31,20 @@ const SnackbarProvider = ({ children, service }) => {
   const [count, setCount] = useState(1);
   const [snackbarItems, setSnackbarItems] = useState([]);
 
+  useEffect(() => {
+    const onLogHandler = ({ type, notify, title, message }) => {
+      if (notify) {
+        show({ type, title, message });
+      }
+    };
+
+    LogManager.subscribe(LogManager.EVENTS.OnLog, onLogHandler);
+
+    return () => {
+      LogManager.subscribe(LogManager.EVENTS.OnLog, onLogHandler);
+    };
+  }, [show]);
+
   const show = useCallback(
     options => {
       if (!options || (!options.title && !options.message)) {