From bf0e2bb444b5c6eb7e88ad40d07a980432173304 Mon Sep 17 00:00:00 2001
From: Seth Trowbridge <seth111@gmail.com>
Date: Tue, 6 Jun 2023 12:50:50 -0400
Subject: [PATCH] init

---
 .vscode/settings.json |  4 ++
 serve.tsx             | 99 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)
 create mode 100644 .vscode/settings.json
 create mode 100644 serve.tsx

diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..8675ad5
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,4 @@
+{
+    "deno.enable": true,
+    "deno.unstable": true
+}
\ No newline at end of file
diff --git a/serve.tsx b/serve.tsx
new file mode 100644
index 0000000..66660dd
--- /dev/null
+++ b/serve.tsx
@@ -0,0 +1,99 @@
+import * as MIME from "https://deno.land/std@0.180.0/media_types/mod.ts";
+import * as HTTP from "https://deno.land/std@0.177.0/http/server.ts";
+import * as SWCW from "https://esm.sh/@swc/wasm-web@1.3.62";
+
+type Configuration = {Proxy:string, Allow:string, Reset:string};
+type ConfigurationArgs = {Proxy?:string, Allow?:string, Reset?:string};
+
+let Configure:Configuration =
+{
+    Proxy: "",
+    Allow: "*",
+    Reset: "/clear-cache"
+};
+export default (config:ConfigurationArgs)=> Configure = {...Configure, ...config};
+
+const TranspileConfig:SWCW.Options = {
+  sourceMaps: true,
+  minify: true,
+  jsc:
+  {
+    minify:
+    {
+        compress: { unused: true },
+        mangle: true
+    },
+    parser:
+    {
+        syntax: "typescript",
+        tsx: true,
+    },
+    transform:
+    {
+      react: { runtime: "automatic" }
+    }
+  },
+}
+const TranspileCache:Map<string, string> = new Map();
+const TranspileFetch =async(inPath:string)=>
+{
+    if(inPath.endsWith(".tsx") || inPath.endsWith(".jsx") || inPath.endsWith(".js") || inPath.endsWith(".mjs"))
+    {
+        const check = TranspileCache.get(inPath);
+        if(check)
+        {
+            return check;
+        }
+        else
+        {
+            try
+            {
+                const resp = await fetch(Configure.Proxy + inPath);
+                const text = await resp.text();
+                const {code, map} = await SWCW.transform(text, TranspileConfig);
+                TranspileCache.set(inPath, code);
+                return code;
+            }
+            catch(e)
+            {
+                return null;
+            }
+        }
+    }
+    else
+    {
+        return false;
+    }
+};
+
+await SWCW.default();
+HTTP.serve(async(req: Request)=>
+{
+    const url:URL = new URL(req.url);
+
+    if(url.pathname === Configure.Reset)
+    {
+        const size = TranspileCache.size;
+        TranspileCache.clear();
+        return new Response(`cache cleared (${size} items)`);
+    }
+
+    const lookup = await TranspileFetch(url.pathname);
+    if(lookup === null)
+    {
+        // error
+        return new Response(`error (see console)`, {status:404, headers:{"content-type":"application/javascript", "Access-Control-Allow-Origin": Configure.Allow, charset:"utf-8"}});
+    }
+    else if(lookup === false)
+    {
+        // not a javascript file
+        const type = MIME.typeByExtension(url.pathname.substring(url.pathname.lastIndexOf("."))) || "text/html";
+        const file = await fetch(Configure.Proxy + url.pathname);
+        const text = await file.text();
+        return new Response(text, {headers:{"content-type":type, "Access-Control-Allow-Origin":Configure.Allow, charset:"utf-8"}});
+    }
+    else
+    {
+        return new Response(lookup, {headers:{"content-type":"application/javascript", "Access-Control-Allow-Origin": Configure.Allow, charset:"utf-8"}});
+    }
+});
\ No newline at end of file