WebService: Verify username and token (#2930)

* WebService: Verify username and token; Log errors in PostJson

* Fixup: added docstrings to the functions

* Webservice: Added Icons to the verification, imrpved error detection in cpr, fixup nits

* fixup: fmt warning

src/core/settings.h

@@ -133,6 +133,7 @@ struct Values {
     // WebService
     bool enable_telemetry;
     std::string telemetry_endpoint_url;
+    std::string verify_endpoint_url;
     std::string citra_username;
     std::string citra_token;
 } extern values;

src/core/telemetry_session.cpp

@@ -15,6 +15,7 @@
 
 #ifdef ENABLE_WEB_SERVICE
 #include "web_service/telemetry_json.h"
+#include "web_service/verify_login.h"
 #endif
 
 namespace Core {
@@ -75,6 +76,17 @@ u64 RegenerateTelemetryId() {
     return new_telemetry_id;
 }
 
+std::future<bool> VerifyLogin(std::string username, std::string token, std::function<void()> func) {
+#ifdef ENABLE_WEB_SERVICE
+    return WebService::VerifyLogin(username, token, Settings::values.verify_endpoint_url, func);
+#else
+    return std::async(std::launch::async, [func{std::move(func)}]() {
+        func();
+        return false;
+    });
+#endif
+}
+
 TelemetrySession::TelemetrySession() {
 #ifdef ENABLE_WEB_SERVICE
     if (Settings::values.enable_telemetry) {

src/core/telemetry_session.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <future>
 #include <memory>
 #include "common/telemetry.h"
 
@@ -47,4 +48,13 @@ u64 GetTelemetryId();
  */
 u64 RegenerateTelemetryId();
 
+/**
+ * Verifies the username and token.
+ * @param username Citra username to use for authentication.
+ * @param token Citra token to use for authentication.
+ * @param func A function that gets exectued when the verification is finished
+ * @returns Future with bool indicating whether the verification succeeded
+ */
+std::future<bool> VerifyLogin(std::string username, std::string token, std::function<void()> func);
+
 } // namespace Core