Outbound link previews

ts/textsecure/SendMessage.ts

@@ -7,6 +7,7 @@
 
 import { Dictionary, without } from 'lodash';
 import PQueue from 'p-queue';
+import { AbortSignal } from 'abort-controller';
 
 import {
   GroupCredentialsType,
@@ -37,6 +38,10 @@ import {
 } from '../textsecure.d';
 import { MessageError, SignedPreKeyRotationError } from './Errors';
 import { BodyRangesType } from '../types/Util';
+import {
+  LinkPreviewImage,
+  LinkPreviewMetadata,
+} from '../linkPreviews/linkPreviewFetch';
 
 function stringToArrayBuffer(str: string): ArrayBuffer {
   if (typeof str !== 'string') {
@@ -272,6 +277,8 @@ class Message {
         const item = new window.textsecure.protobuf.DataMessage.Preview();
         item.title = preview.title;
         item.url = preview.url;
+        item.description = preview.description || null;
+        item.date = preview.date || null;
         item.image = preview.image || null;
         return item;
       });
@@ -1723,6 +1730,20 @@ export default class MessageSender {
     );
   }
 
+  async fetchLinkPreviewMetadata(
+    href: string,
+    abortSignal: AbortSignal
+  ): Promise<null | LinkPreviewMetadata> {
+    return this.server.fetchLinkPreviewMetadata(href, abortSignal);
+  }
+
+  async fetchLinkPreviewImage(
+    href: string,
+    abortSignal: AbortSignal
+  ): Promise<null | LinkPreviewImage> {
+    return this.server.fetchLinkPreviewImage(href, abortSignal);
+  }
+
   async makeProxiedRequest(
     url: string,
     options?: ProxiedRequestOptionsType

ts/textsecure/WebAPI.ts

@@ -7,6 +7,7 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 
 import fetch, { Response } from 'node-fetch';
+import { AbortSignal } from 'abort-controller';
 import ProxyAgent from 'proxy-agent';
 import { Agent } from 'https';
 import pProps from 'p-props';
@@ -39,6 +40,8 @@ import {
   getRandomValue,
   splitUuids,
 } from '../Crypto';
+import * as linkPreviewFetch from '../linkPreviews/linkPreviewFetch';
+
 import {
   AvatarUploadAttributesClass,
   GroupChangeClass,
@@ -761,6 +764,14 @@ export type WebAPIType = {
   getUuidsForE164s: (
     e164s: ReadonlyArray<string>
   ) => Promise<Dictionary<string | null>>;
+  fetchLinkPreviewMetadata: (
+    href: string,
+    abortSignal: AbortSignal
+  ) => Promise<null | linkPreviewFetch.LinkPreviewMetadata>;
+  fetchLinkPreviewImage: (
+    href: string,
+    abortSignal: AbortSignal
+  ) => Promise<null | linkPreviewFetch.LinkPreviewImage>;
   makeProxiedRequest: (
     targetUrl: string,
     options?: ProxiedRequestOptionsType
@@ -942,6 +953,8 @@ export function initialize({
       getStorageManifest,
       getStorageRecords,
       getUuidsForE164s,
+      fetchLinkPreviewMetadata,
+      fetchLinkPreviewImage,
       makeProxiedRequest,
       modifyGroup,
       modifyStorageRecords,
@@ -1750,6 +1763,24 @@ export function initialize({
       return characters;
     }
 
+    async function fetchLinkPreviewMetadata(
+      href: string,
+      abortSignal: AbortSignal
+    ) {
+      return linkPreviewFetch.fetchLinkPreviewMetadata(
+        fetch,
+        href,
+        abortSignal
+      );
+    }
+
+    async function fetchLinkPreviewImage(
+      href: string,
+      abortSignal: AbortSignal
+    ) {
+      return linkPreviewFetch.fetchLinkPreviewImage(fetch, href, abortSignal);
+    }
+
     async function makeProxiedRequest(
       targetUrl: string,
       options: ProxiedRequestOptionsType = {}