From 525e4f51976c11b36d5dd7918a95f4021f9bb25e Mon Sep 17 00:00:00 2001
From: Araozu <fernando@araozu.dev>
Date: Sun, 19 May 2024 21:47:31 -0500
Subject: [PATCH] Create a state machine with Alpine

---
 src/components/InteractiveCode.astro | 54 +++++++++++++++++-----------
 1 file changed, 34 insertions(+), 20 deletions(-)

diff --git a/src/components/InteractiveCode.astro b/src/components/InteractiveCode.astro
index 0975b33..3dd8cf3 100644
--- a/src/components/InteractiveCode.astro
+++ b/src/components/InteractiveCode.astro
@@ -99,7 +99,15 @@ function highlightCode(lines: Array<string>): string {
 const codeHtml = highlightCode(trimAndDedent(code));
 ---
 
-<div class="bg-black text-white rounded" x-data="editor">
+<div class="bg-black text-white rounded"
+    x-data={`{
+        line: 0,
+        stdout: "",
+        ip: 0,
+        inst: [["line", 5]],
+        done: false,
+    }`}
+>
     <span class="inline-block bg-[var(--code-theme-bg-acolor)] px-2 rounded-tl rounded-tr font-mono text-sm">thp code</span>
     <pre class="language-thp" style="margin: 0; border-top-left-radius: 0;" data-disabled><code set:html={codeHtml}></code></pre>
     <div class="grid grid-cols-2 font-mono text-sm">
@@ -117,36 +125,42 @@ const codeHtml = highlightCode(trimAndDedent(code));
         </div>
     </div>
     <div class="border-t border-white p-1">
-        <button class="font-mono px-1 rounded bg-pink-950" @click="next()">
+        <button class="font-mono px-1 rounded bg-pink-950" @click="alpineNext($data)" :disabled="done && 'true'">
             Step
         </button>
     </div>
 </div>
 
 <script>
+    type Instruction = "line" ;
     type AlpineState = {
         line: number,
         stdout: string,
+        ip: number,
+        inst: Array<[Instruction, number]>
+        done: boolean,
     }
 
-    document.addEventListener("alpine:init", () => {
-        // @ts-ignore
-        const Alpine: any = window.Alpine;
-
-        function f(obj: AlpineState) {
-            obj.line += 1;
+    /// Executes the instruction following the state of the machine.
+    function alpineNext(data: AlpineState) {
+        const len = data.inst.length;
+        const ip = data.ip;
+        data.ip += 1;
+        
+        const instructionArr = data.inst[ip]!;
+        switch (instructionArr[0]) {
+            case "line": {
+                data.line = Number(instructionArr[1]);
+                break;
+            }
         }
 
-        Alpine.data("editor", () => ({
-            line: 0,
-            stdout: "",
-            next() {
-                f(this);
-            },
-            reset() {
-                this.line = 0;
-                this.stdout = "";
-            },
-        }));
-    });
+        if (data.ip >= len) {
+            console.log("done");
+            data.done = true;
+            return;
+        }
+    }
+    // @ts-ignore
+    window.alpineNext = alpineNext;
 </script>