WikiTree: store logged in user name in a cookie

src/top_bar.tsx

@@ -1,12 +1,12 @@
 import * as queryString from 'query-string';
 import * as React from 'react';
-import Cookies from 'js-cookie';
 import debounce from 'debounce';
 import md5 from 'md5';
 import {analyticsEvent} from './analytics';
 import {buildSearchIndex, SearchIndex} from './search_index';
 import {displaySearchResult} from './search_util';
 import {FormattedMessage, intlShape} from 'react-intl';
+import {getLoggedInUserName} from './wikitree';
 import {IndiInfo, JsonGedcomData} from 'topola';
 import {Link} from 'react-router-dom';
 import {RouteComponentProps} from 'react-router-dom';
@@ -293,12 +293,11 @@ export class TopBar extends React.Component<
   }
 
   private checkWikiTreeLoginState() {
-    const wikiTreeLoginState =
+    const wikiTreeLoginUsername = getLoggedInUserName();
-      Cookies.get('wikidb_wtb_UserID') !== undefined
+    const wikiTreeLoginState = wikiTreeLoginUsername
-        ? WikiTreeLoginState.LOGGED_IN
+      ? WikiTreeLoginState.LOGGED_IN
-        : WikiTreeLoginState.NOT_LOGGED_IN;
+      : WikiTreeLoginState.NOT_LOGGED_IN;
     if (this.state.wikiTreeLoginState !== wikiTreeLoginState) {
-      const wikiTreeLoginUsername = Cookies.get('wikidb_wtb_UserName');
       this.setState(
         Object.assign({}, this.state, {
           wikiTreeLoginState,
@@ -650,7 +649,7 @@ export class TopBar extends React.Component<
           src={WIKITREE_LOGO_URL}
           alt="WikiTree logo"
           className="menu-icon"
-          />
+        />
         <FormattedMessage
           id="menu.select_wikitree_id"
           defaultMessage="Select WikiTree ID"
@@ -828,7 +827,7 @@ export class TopBar extends React.Component<
                     src={WIKITREE_LOGO_URL}
                     alt="WikiTree logo"
                     className="menu-icon"
-                    />
+                  />
                   <FormattedMessage
                     id="menu.wikitree_login"
                     defaultMessage="Log in to WikiTree"
@@ -878,7 +877,7 @@ export class TopBar extends React.Component<
                     src={WIKITREE_LOGO_URL}
                     alt="WikiTree logo"
                     className="menu-icon"
-                    />
+                  />
                   <FormattedMessage
                     id="menu.wikitree_logged_in"
                     defaultMessage="Logged in"

src/wikitree.ts

@@ -3,6 +3,12 @@ import {Date, JsonFam, JsonIndi, DateOrRange} from 'topola';
 import {GedcomData, TopolaData, normalizeGedcom} from './gedcom_util';
 import {GedcomEntry} from 'parse-gedcom';
 
+/**
+ * Cookie where the logged in user name is stored. This cookie is shared
+ * between apps hosted on apps.wikitree.com.
+ */
+const USER_NAME_COOKIE = 'wikidb_wtb_UserName';
+
 /** WikiTree API getAncestors request. */
 interface GetAncestorsRequest {
   action: 'getAncestors';
@@ -11,19 +17,29 @@ interface GetAncestorsRequest {
 }
 
 /** WikiTree API getRelatives request. */
-interface GetRelatives {
+interface GetRelativesRequest {
   action: 'getRelatives';
   keys: string;
   getChildren?: true;
   getSpouses?: true;
 }
 
-interface ClientLogin {
+/** WikiTree API clientLogin request. */
+interface ClientLoginRequest {
   action: 'clientLogin';
   authcode: string;
 }
 
-type WikiTreeRequest = GetAncestorsRequest | GetRelatives | ClientLogin;
+/** WikiTree API clientLogin response. */
+interface ClientLoginResponse {
+  result: string;
+  username: string;
+}
+
+type WikiTreeRequest =
+  | GetAncestorsRequest
+  | GetRelativesRequest
+  | ClientLoginRequest;
 
 /** Person structure returned from WikiTree API. */
 interface Person {
@@ -154,7 +170,9 @@ async function getRelatives(keys: string[], handleCors: boolean) {
   return result.concat(fetchedResults);
 }
 
-export async function clientLogin(authcode: string) {
+export async function clientLogin(
+  authcode: string,
+): Promise<ClientLoginResponse> {
   const response = await wikiTreeGet(
     {
       action: 'clientLogin',
@@ -165,6 +183,18 @@ export async function clientLogin(authcode: string) {
   return response.clientLogin;
 }
 
+/**
+ * Returnes the logged in user name or undefined if not logged in.
+ *
+ * This is not an authoritative answer. The result of this function relies on
+ * the cookies set on the apps.wikitree.com domain under which this application
+ * is hosted. The authoritative source of login information is in cookies set on
+ * the api.wikitree.com domain.
+ */
+export function getLoggedInUserName(): string | undefined {
+  return Cookies.get(USER_NAME_COOKIE);
+}
+
 /**
  * Loads data from WikiTree to populate an hourglass chart starting from the
  * given person ID.
@@ -176,10 +206,11 @@ export async function loadWikiTree(
   // Work around CORS if not in apps.wikitree.com domain.
   const handleCors = window.location.hostname !== 'apps.wikitree.com';
 
-  if (!handleCors && !Cookies.get('wikidb_wtb_UserID') && authcode) {
+  if (!handleCors && !getLoggedInUserName() && authcode) {
     const loginResult = await clientLogin(authcode);
     if (loginResult.result === 'Success') {
       sessionStorage.clear();
+      Cookies.set(USER_NAME_COOKIE, loginResult.username);
     }
   }