feat: 🎸 Improve usability of Google Cloud adapter, including direct routes to studies (#989)

platform/viewer/src/customHooks/useServer.js

@@ -0,0 +1,77 @@
+import React, { useContext } from 'react';
+import GoogleCloudApi from '../googleCloud/api/GoogleCloudApi';
+
+import * as GoogleCloudUtilServers from '../googleCloud/utils/getServers';
+import { useSelector, useDispatch } from 'react-redux';
+
+// Contexts
+import AppContext from '../context/AppContext';
+
+const getActiveServer = servers => {
+  const isActive = a => a.active === true;
+
+  return servers && servers.servers && servers.servers.find(isActive);
+};
+
+const getServers = (appConfig, project, location, dataset, dicomStore) => {
+  let servers = [];
+  if (appConfig.enableGoogleCloudAdapter) {
+    const pathUrl = GoogleCloudApi.getUrlBaseDicomWeb(
+      project,
+      location,
+      dataset,
+      dicomStore
+    );
+    const data = {
+      project,
+      location,
+      dataset,
+      dicomStore,
+      wadoUriRoot: pathUrl,
+      qidoRoot: pathUrl,
+      wadoRoot: pathUrl,
+    };
+    servers = GoogleCloudUtilServers.getServers(data, dicomStore);
+  }
+
+  return servers;
+};
+
+const updateServer = (
+  appConfig,
+  dispatch,
+  project,
+  location,
+  dataset,
+  dicomStore
+) => {
+  const servers = getServers(appConfig, project, location, dataset, dicomStore);
+
+  if (servers && servers.length) {
+    const action = {
+      type: 'SET_SERVERS',
+      servers,
+    };
+    dispatch(action);
+  }
+};
+
+export default function useServer({
+  project,
+  location,
+  dataset,
+  dicomStore,
+} = {}) {
+  // Hooks
+  const servers = useSelector(state => state && state.servers);
+  const dispatch = useDispatch();
+  const { appConfig = {} } = useContext(AppContext);
+
+  const server = getActiveServer(servers);
+
+  if (!server) {
+    updateServer(appConfig, dispatch, project, location, dataset, dicomStore);
+  } else {
+    return server;
+  }
+}