Authenticated Media Support (#51)

* Fix AvatarField to work with authenticated media

* Fix ViewMediaButton to work for user's media tab and reported events

* remove console.log

* cleanup AvatarField

* use correct thumbnail size

* fix AvatarField.test

* ignore postgres data for watchman

* fix new avatar preview

* watchman should ignore testdata completely, instead of specific subdirs

* update README

* change user's media icon in sidebar - use the same icon as the media tab

* Add preview for user media files if mimeType is image/*

* Add new line in user media Dialog

src/utils/fetchMedia.ts

@@ -0,0 +1,43 @@
+import storage from "../storage";
+
+export const getServerAndMediaIdFromMxcUrl = (mxcUrl: string): { serverName: string, mediaId: string } => {
+    const re = /^mxc:\/\/([^/]+)\/(\w+)/;
+    const ret = re.exec(mxcUrl);
+    console.log("mxcClient " + ret);
+    if (ret == null) {
+      throw new Error("Invalid mxcUrl");
+    }
+    const serverName = ret[1];
+    const mediaId = ret[2];
+    return { serverName, mediaId };
+};
+
+export type MediaType = "thumbnail" | "original";
+
+export const fetchAuthenticatedMedia = async (mxcUrl: string, type: MediaType): Promise<Response> => {
+  const homeserver = storage.getItem("base_url");
+  const accessToken = storage.getItem("access_token");
+
+  const { serverName, mediaId } = getServerAndMediaIdFromMxcUrl(mxcUrl);
+  if (!serverName || !mediaId) {
+    throw new Error("Invalid mxcUrl");
+  }
+
+  let url = "";
+  if (type === "thumbnail") {
+    // ref: https://spec.matrix.org/latest/client-server-api/#thumbnails
+    url = `${homeserver}/_matrix/client/v1/media/thumbnail/${serverName}/${mediaId}?width=320&height=240&method=scale`;
+  } else if (type === "original") {
+    url = `${homeserver}/_matrix/client/v1/media/download/${serverName}/${mediaId}`;
+  } else {
+    throw new Error("Invalid authenticated media type");
+  }
+
+  const response = await fetch(`${url}`, {
+    headers: {
+      authorization: `Bearer ${accessToken}`,
+    },
+  });
+
+  return response;
+};