(core) Allowing non-owner managers to add other managers

Summary:
Billing managers can now add other billing managers. Before
only managers with owner access could do that.

Test Plan: Added test

Reviewers: georgegevoian

Reviewed By: georgegevoian

Differential Revision: https://phab.getgrist.com/D4339

app/client/ui/UserImage.ts

@@ -1,5 +1,5 @@
 import {colors, theme} from 'app/client/ui2018/cssVars';
-import {FullUser} from 'app/common/LoginSessionAPI';
+import {UserProfile} from 'app/common/LoginSessionAPI';
 import {dom, DomElementArg, styled} from 'grainjs';
 import {icon} from 'app/client/ui2018/icons';
 
@@ -9,7 +9,9 @@ export type Size = 'small' | 'medium' | 'large';
  * Returns a DOM element showing a circular icon with a user's picture, or the user's initials if
  * picture is missing. Also varies the color of the circle when using initials.
  */
-export function createUserImage(user: FullUser|'exampleUser'|null, size: Size, ...args: DomElementArg[]): HTMLElement {
+export function createUserImage(
+  user: UserProfile|'exampleUser'|null, size: Size, ...args: DomElementArg[]
+): HTMLElement {
   let initials: string;
   return cssUserImage(
     cssUserImage.cls('-' + size),
@@ -39,7 +41,7 @@ export function getInitials(user: {name?: string, email?: string}) {
 /**
  * Hashes the username to return a color.
  */
-function pickColor(user: FullUser): string {
+function pickColor(user: UserProfile): string {
   let c = hashCode(user.name + ':' + user.email) % someColors.length;
   if (c < 0) { c += someColors.length; }
   return someColors[c];

app/common/LoginSessionAPI.ts

@@ -1,3 +1,4 @@
+import {normalizeEmail} from 'app/common/emails';
 import {UserPrefs} from 'app/common/Prefs';
 
 // User profile info for the user. When using Cognito, it is fetched during login.
@@ -12,6 +13,21 @@ export interface UserProfile {
   locale?: string|null;
 }
 
+/**
+ * Tries to compare two user profiles to see if they represent the same user.
+ * Note: if you have access to FullUser objects, comparing ids is more reliable.
+ */
+export function sameUser(a: UserProfile|FullUser, b: UserProfile|FullUser): boolean {
+  if ('id' in a && 'id' in b) {
+    return a.id === b.id;
+  }
+  if (a.loginEmail && b.loginEmail) {
+    return a.loginEmail === b.loginEmail;
+  } else {
+    return normalizeEmail(a.email) === normalizeEmail(b.email);
+  }
+}
+
 // User profile including user id and user ref.  All information in it should
 // have been validated against database.
 export interface FullUser extends UserProfile {