http: add /ready

openapi.yml

@@ -1,12 +1,36 @@
 openapi: "3.0.2"
 info:
-  title: API Title
+  title: BeamMP-Server
   version: "1.0"
+  description: |
+    The BeamMP-Server optionally runs an HTTP server
+    which can be used to query information about the server's 
+    status, health, players, etc.
 servers:
-  - url: https://localhost:8000/v1
+  - url: http://localhost:{port}/v1
+    description: local BeamMP-Server
+    variables:
+      port:
+        default: "8000"
 paths:
+  /ready:
+    get:
+      summary: whether the server has started fully
+      description: |
+        True once all subsystems have started up.
+        This doesn't tell you whether they're healthy, 
+        check /health for that information.
+      responses:
+        "200":
+          description: OK
+          content:
+            "text/plain":
+              schema:
+                type: boolean
+
   /health:
     get:
+      summary: health of the server's systems
       responses:
         "200":
           description: OK

src/Http.cpp

@@ -157,6 +157,25 @@ void Http::Server::THttpServerInstance::operator()() try {
     HttpLibServerInstance->Get("/", [](const httplib::Request&, httplib::Response& res) {
         res.set_content("<!DOCTYPE html><article><h1>Hello World!</h1><section><p>BeamMP Server can now serve HTTP requests!</p></section></article></html>", "text/html");
     });
+    HttpLibServerInstance->Get(API_V1 "/ready", [](const httplib::Request&, httplib::Response& res) {
+        auto Statuses = Application::GetSubsystemStatuses();
+        bool Started = true;
+        for (const auto& NameStatusPair : Statuses) {
+            switch (NameStatusPair.second) {
+            case Application::Status::Starting:
+            case Application::Status::ShuttingDown:
+            case Application::Status::Shutdown:
+                Started = false;
+                break;
+            case Application::Status::Good:
+            case Application::Status::Bad:
+                break;
+            }
+        }
+        res.status = 200;
+        res.set_content(Started ? "true" : "false", "text/plain");
+    });
+
     HttpLibServerInstance->Get(API_V1 "/health", [](const httplib::Request&, httplib::Response& res) {
         size_t SystemsGood = 0;
         size_t SystemsBad = 0;