Adds Bridge Handler for Fetching Logged in Steam User

src/lib/bridge/handlers/fetch_steam_user.ts

@@ -0,0 +1,38 @@
+import {SimpleHandler} from './main';
+import {RequestType} from './types';
+
+interface FetchSteamUserRequest {}
+
+interface FetchSteamUserResponse {
+    isLoggedIn: boolean;
+    steamID?: string;
+    sessionID?: string;
+}
+
+export const FetchSteamUser = new SimpleHandler<FetchSteamUserRequest, FetchSteamUserResponse>(
+    RequestType.FETCH_STEAM_USER,
+    async (req) => {
+        const resp = await fetch('https://steamcommunity.com');
+        if (!resp.ok) {
+            throw new Error('non-ok response for steamcommunity.com');
+        }
+
+        const res: FetchSteamUserResponse = {
+            isLoggedIn: false,
+        };
+
+        const text = await resp.text();
+        const steamIDMatch = text.match(/g_steamID = "(\d+)"/);
+        if (steamIDMatch) {
+            res.isLoggedIn = true;
+            res.steamID = steamIDMatch[1];
+        }
+
+        const sessionIDMatch = text.match(/g_sessionID = "([0-9a-fA-F]+)"/);
+        if (sessionIDMatch) {
+            res.sessionID = sessionIDMatch[1];
+        }
+
+        return res;
+    }
+);

src/lib/bridge/handlers/handlers.ts

@@ -18,6 +18,7 @@ import {PingSetupExtension} from './ping_setup_extension';
 import {PingExtensionStatus} from './ping_extension_status';
 import {PingCancelTrade} from './ping_cancel_trade';
 import {CreateTradeOffer} from './create_trade_offer';
+import {FetchSteamUser} from './fetch_steam_user';
 
 export const HANDLERS_MAP: {[key in RequestType]: RequestHandler<any, any>} = {
     [RequestType.EXECUTE_SCRIPT_ON_PAGE]: ExecuteScriptOnPage,
@@ -38,4 +39,5 @@ export const HANDLERS_MAP: {[key in RequestType]: RequestHandler<any, any>} = {
     [RequestType.PING_EXTENSION_STATUS]: PingExtensionStatus,
     [RequestType.PING_CANCEL_TRADE]: PingCancelTrade,
     [RequestType.CREATE_TRADE_OFFER]: CreateTradeOffer,
+    [RequestType.FETCH_STEAM_USER]: FetchSteamUser,
 };

src/lib/bridge/handlers/types.ts

@@ -17,4 +17,5 @@ export enum RequestType {
     PING_EXTENSION_STATUS = 15,
     PING_CANCEL_TRADE = 16,
     CREATE_TRADE_OFFER = 17,
+    FETCH_STEAM_USER = 18,
 }