Show sharer preview for matrix.to links

src/components/DefaultPreview.scss

@@ -19,4 +19,8 @@ limitations under the License.
         border-radius: 0;
         border: 0;
     }
+
+    h1 {
+        word-break: break-all;
+    }
 }

src/components/LinkPreview.tsx

@@ -20,10 +20,11 @@ import { getEvent, client } from 'matrix-cypher';
 import { RoomPreviewWithTopic } from './RoomPreview';
 import InviteTile from './InviteTile';
 import { SafeLink, LinkKind } from '../parser/types';
-import UserPreview from './UserPreview';
+import UserPreview, { WrappedInviterPreview } from './UserPreview';
 import EventPreview from './EventPreview';
 import HomeserverOptions from './HomeserverOptions';
 import DefaultPreview from './DefaultPreview';
+import Toggle from './Toggle';
 import { clientMap } from '../clients';
 import {
     getRoomFromId,
@@ -32,12 +33,7 @@ import {
     getUser,
 } from '../utils/cypher-wrapper';
 import { ClientContext } from '../contexts/ClientContext';
-import HSContext, {
-    TempHSContext,
-    HSOptions,
-    State as HSState,
-} from '../contexts/HSContext';
-import Toggle from './Toggle';
+import useHSs from '../utils/getHS';
 
 interface IProps {
     link: SafeLink;
@@ -118,32 +114,14 @@ const Preview: React.FC<PreviewProps> = ({ link, client }: PreviewProps) => {
     return content;
 };
 
-function selectedClient(link: SafeLink, hsOptions: HSState): string[] {
-    switch (hsOptions.option) {
-        case HSOptions.Unset:
-            return [];
-        case HSOptions.None:
-            return [];
-        case HSOptions.TrustedHSOnly:
-            return [hsOptions.hs];
-        case HSOptions.Any:
-            return [
-                'https://' + link.identifier.split(':')[1],
-                ...link.arguments.vias,
-            ];
-    }
-}
-
 const LinkPreview: React.FC<IProps> = ({ link }: IProps) => {
     let content: JSX.Element;
     const [showHSOptions, setShowHSOPtions] = useState(false);
-    const [hsOptions] = useContext(HSContext);
-    const [tempHSState] = useContext(TempHSContext);
 
-    if (
-        hsOptions.option === HSOptions.Unset &&
-        tempHSState.option === HSOptions.Unset
-    ) {
+    const hses = useHSs(link);
+    console.log(hses);
+
+    if (!hses) {
         content = (
             <>
                 <DefaultPreview link={link} />
@@ -164,11 +142,7 @@ const LinkPreview: React.FC<IProps> = ({ link }: IProps) => {
             );
         }
     } else {
-        const clients =
-            tempHSState.option !== HSOptions.Unset
-                ? selectedClient(link, tempHSState)
-                : selectedClient(link, hsOptions);
-        content = <Preview link={link} client={clients[0]} />;
+        content = <Preview link={link} client={hses[0]} />;
     }
 
     const [{ clientId }] = useContext(ClientContext);
@@ -182,8 +156,20 @@ const LinkPreview: React.FC<IProps> = ({ link }: IProps) => {
 
     const client = displayClientId ? clientMap[displayClientId] : null;
 
+    const sharer = link.arguments.sharer ? (
+        <WrappedInviterPreview
+            link={{
+                kind: LinkKind.UserId,
+                identifier: link.arguments.sharer,
+                arguments: { vias: [] },
+                originalLink: '',
+            }}
+        />
+    ) : null;
+
     return (
         <InviteTile client={client} link={link}>
+            {sharer}
             {content}
         </InviteTile>
     );

src/components/UserPreview.tsx

@@ -14,10 +14,13 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React from 'react';
-import { User } from 'matrix-cypher';
+import React, { useState, useEffect } from 'react';
+import { client, User, getUserDetails } from 'matrix-cypher';
+import icon from '../imgs/chat-icon.svg';
 
-import { UserAvatar } from './Avatar';
+import Avatar, { UserAvatar } from './Avatar';
+import useHSs from '../utils/getHS';
+import { UserId } from '../parser/types';
 
 import './UserPreview.scss';
 
@@ -37,14 +40,49 @@ const UserPreview: React.FC<IProps> = ({ user, userId }: IProps) => (
 
 export default UserPreview;
 
-export const InviterPreview: React.FC<IProps> = ({ user, userId }: IProps) => (
+interface InviterPreviewProps {
+    user?: User;
+    userId: string;
+}
+
+export const InviterPreview: React.FC<InviterPreviewProps> = ({
+    user,
+    userId,
+}: InviterPreviewProps) => {
+    const avatar = user ? (
+        <UserAvatar user={user} userId={userId} />
+    ) : (
+        <Avatar label={`Placeholder icon for ${userId}`} avatarUrl={icon} />
+    );
+    return (
         <div className="miniUserPreview">
             <div>
                 <h1>
-                Invited by <b>{user.displayname}</b>
+                    Invited by <b>{user ? user.displayname : userId}</b>
                 </h1>
-            <p>{userId}</p>
+                {user ? <p>{userId}</p> : null}
             </div>
-        <UserAvatar user={user} userId={userId} />
+            {avatar}
         </div>
-);
+    );
+};
+
+interface WrappedInviterProps {
+    link: UserId;
+}
+
+export const WrappedInviterPreview: React.FC<WrappedInviterProps> = ({
+    link,
+}: WrappedInviterProps) => {
+    const [user, setUser] = useState<User | undefined>(undefined);
+    const hss = useHSs(link);
+    useEffect(() => {
+        if (hss) {
+            client(hss[0])
+                .then((c) => getUserDetails(c, link.identifier))
+                .then(setUser)
+                .catch((x) => console.log("couldn't fetch user preview", x));
+        }
+    }, [hss, link]);
+    return <InviterPreview user={user} userId={link.identifier} />;
+};

src/contexts/HSContext.ts

@@ -29,17 +29,12 @@ export enum HSOptions {
     TrustedHSOnly = 'TRUSTED_CLIENT_ONLY',
     // Matrix.to may contact any homeserver it requires
     Any = 'ANY',
-    // Matrix.to may not contact any homeservers
-    None = 'NONE',
 }
 
 const STATE_SCHEMA = union([
     object({
         option: literal(HSOptions.Unset),
     }),
-    object({
-        option: literal(HSOptions.None),
-    }),
     object({
         option: literal(HSOptions.Any),
     }),
@@ -55,7 +50,6 @@ export type State = TypeOf<typeof STATE_SCHEMA>;
 export enum ActionType {
     SetHS = 'SET_HS',
     SetAny = 'SET_ANY',
-    SetNone = 'SET_NONE',
 }
 
 export interface SetHS {
@@ -67,11 +61,7 @@ export interface SetAny {
     action: ActionType.SetAny;
 }
 
-export interface SetNone {
-    action: ActionType.SetNone;
-}
-
-export type Action = SetHS | SetAny | SetNone;
+export type Action = SetHS | SetAny;
 
 export const INITIAL_STATE: State = {
     option: HSOptions.Unset,
@@ -81,10 +71,6 @@ export const unpersistedReducer = (state: State, action: Action): State => {
     console.log('reducing');
     console.log(action);
     switch (action.action) {
-        case ActionType.SetNone:
-            return {
-                option: HSOptions.None,
-            };
         case ActionType.SetAny:
             return {
                 option: HSOptions.Any,

src/utils/getHS.ts

@@ -0,0 +1,52 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { useContext } from 'react';
+import HSContext, {
+    TempHSContext,
+    State,
+    HSOptions,
+} from '../contexts/HSContext';
+import { SafeLink } from '../parser/types';
+
+function selectedClient(link: SafeLink, hsOptions: State): string[] {
+    switch (hsOptions.option) {
+        case HSOptions.Unset:
+            return [];
+        case HSOptions.TrustedHSOnly:
+            return [hsOptions.hs];
+        case HSOptions.Any:
+            return [
+                ...link.identifier
+                    .split('/')
+                    .map((i) => 'https://' + i.split(':')[1]),
+                ...link.arguments.vias,
+            ];
+    }
+}
+
+export default function useHSs(link: SafeLink): string[] {
+    const [HSState] = useContext(HSContext);
+    const [TempHSState] = useContext(TempHSContext);
+
+    if (HSState.option !== HSOptions.Unset) {
+        return selectedClient(link, HSState);
+    } else if (TempHSState.option !== HSOptions.Unset) {
+        return selectedClient(link, TempHSState);
+    } else {
+        return [];
+    }
+}