From 7a28a7e31401e4f9aa574c07b316d339aab09ab6 Mon Sep 17 00:00:00 2001
From: Manuel Thalmann <m@nuth.ch>
Date: Wed, 14 Dec 2022 11:23:04 +0100
Subject: [PATCH] Add express handlers for managing save games

---
 package-lock.json            | 31 ++++++++++-
 packages/server/package.json |  3 +-
 packages/server/src/main.js  | 99 ++++++++++++++++++++++++++++++++++++
 3 files changed, 131 insertions(+), 2 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 45bcac4..21e89bd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2660,6 +2660,14 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/drange": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/drange/-/drange-1.1.1.tgz",
+      "integrity": "sha512-pYxfDYpued//QpnLIm4Avk7rsNtAtQkUES2cwAYSvD/wd2pKD71gN2Ebj3e7klzXwjocvE8c5vx/1fxwpqmSxA==",
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/duplexify": {
       "version": "3.7.1",
       "resolved": "https://registry.npmjs.org/duplexify/-/duplexify-3.7.1.tgz",
@@ -7238,6 +7246,26 @@
         }
       ]
     },
+    "node_modules/randexp": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/randexp/-/randexp-0.5.3.tgz",
+      "integrity": "sha512-U+5l2KrcMNOUPYvazA3h5ekF80FHTUG+87SEAmHZmolh1M+i/WyTCxVzmi+tidIa1tM4BSe8g2Y/D3loWDjj+w==",
+      "dependencies": {
+        "drange": "^1.0.2",
+        "ret": "^0.2.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/randexp/node_modules/ret": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/ret/-/ret-0.2.2.tgz",
+      "integrity": "sha512-M0b3YWQs7R3Z917WRQy1HHA7Ba7D8hvZg6UE5mLykJxQVE2ju0IXbGlaHPPlkY+WN7wFP+wUMXmBFA0aV6vYGQ==",
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/range-parser": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
@@ -9692,7 +9720,8 @@
       "name": "connect-force-server",
       "version": "0.0.0",
       "dependencies": {
-        "express": "^4.18.2"
+        "express": "^4.18.2",
+        "randexp": "^0.5.3"
       },
       "devDependencies": {
         "@types/express": "^4.17.15",
diff --git a/packages/server/package.json b/packages/server/package.json
index 07413bf..4d61558 100644
--- a/packages/server/package.json
+++ b/packages/server/package.json
@@ -8,7 +8,8 @@
     "start": "noderel -e ./src/main.js"
   },
   "dependencies": {
-    "express": "^4.18.2"
+    "express": "^4.18.2",
+    "randexp": "^0.5.3"
   },
   "devDependencies": {
     "@types/express": "^4.17.15",
diff --git a/packages/server/src/main.js b/packages/server/src/main.js
index 8a767e4..aa8b964 100644
--- a/packages/server/src/main.js
+++ b/packages/server/src/main.js
@@ -1,8 +1,11 @@
 import { join } from "path";
 import { fileURLToPath } from "url";
 import express from "express";
+import RandExp from "randexp";
 import { HTTPError } from "./HTTPError.js";
 
+const { randexp } = RandExp;
+
 const dirname = fileURLToPath(new URL(".", import.meta.url));
 const app = express();
 
@@ -10,6 +13,27 @@ const apiKeys = [
     "c4game"
 ];
 
+const dataPath = "/api/data";
+const parametrizedDataPath = "/api/data/:id";
+
+/**
+ * The data provided by the api.
+ *
+ * @type {Record<string, unknown>}
+ */
+let data = {};
+
+/**
+ * Creates a new guid.
+ *
+ * @returns {string}
+ * The newly created guid.
+ */
+function createGuid()
+{
+    return randexp(/[0-9a-f]{8}(-[0-9a-f]){4}[0-9a-f]{8}/);
+}
+
 app.use(express.static(join(dirname, "..", "..", "game", "lib", "static")));
 app.use("/api", express.json());
 
@@ -38,6 +62,66 @@ app.use(
         }
     });
 
+app.get(
+    parametrizedDataPath,
+    (request, response, next) =>
+    {
+        let id = request.params.id;
+        console.log(`Data ID \`${id}\` requested`);
+
+        if (id in data)
+        {
+            response.send(data[id]);
+        }
+        else
+        {
+            next();
+        }
+    });
+
+app.post(
+    dataPath,
+    (request, response, next) =>
+    {
+        let id = createGuid();
+        data[id] = request.body;
+        response.send({ id });
+    });
+
+app.put(
+    parametrizedDataPath,
+    (request, response, next) =>
+    {
+        let id = request.params.id;
+
+        if (id in data)
+        {
+            data[id] = request.body;
+        }
+        else
+        {
+            next();
+        }
+    });
+
+app.delete(
+    parametrizedDataPath,
+    (request, response, next) =>
+    {
+        let id = request.params.id;
+
+        if (id in data)
+        {
+            delete data[id];
+            response.send();
+            response.status(204);
+        }
+        else
+        {
+            next();
+        }
+    });
+
 app.use(
     [
         (error, request, response, next) =>
@@ -47,4 +131,19 @@ app.use(
         }
     ]);
 
+app.use(
+    "/api",
+    (request, response) =>
+    {
+        response.send({ error: "Not Found" });
+        response.status(404);
+    });
+
+app.use(
+    (request, response) =>
+    {
+        response.send("Not Found");
+        response.status(404);
+    });
+
 app.listen(1337);