Merge pull request #3 from Simponic/godel

L-Program and Godel Numbers

1 files changed, 175 insertions, 0 deletions

diff --git a/godel/js/main.js b/godel/js/main.js
new file mode 100644
index 0000000..9092d2c
--- /dev/null
+++ b/godel/js/main.js
@@ -0,0 +1,175 @@
+const MESSAGES = {
+  COMPILE: "COMPILE",
+  COMPILE_RESULT: "COMPILE_RESULT",
+  EVAL: "EVAL",
+  EVAL_STATUS: "EVAL_RESULT",
+};
+
+// -- the "real" code --
+
+const state = new Observable();
+
+const prepareSource = (text) => text.replaceAll(/\/\/.*/g, "").trim();
+
+const main = () => {
+  let program;
+
+  state.subscribe((msg) => {
+    if (msg.type == MESSAGES.COMPILE) {
+      const { value } = msg;
+      const source = prepareSource(value);
+
+      try {
+        const ast = parser.parse(source);
+        const { js, godelSequence } = compile(ast);
+
+        state.notify({
+          type: MESSAGES.COMPILE_RESULT,
+          success: true,
+          js,
+          godelSequence,
+        });
+      } catch (e) {
+        console.error(e);
+        state.notify({
+          type: MESSAGES.COMPILE_RESULT,
+          error: e.toString(),
+        });
+      }
+    }
+    if (msg.type == MESSAGES.EVAL) {
+      const source = compiledEditorEl.getValue();
+      try {
+        const result = eval(source);
+        state.notify({
+          type: MESSAGES.EVAL_RESULT,
+          success: true,
+          value: result,
+        });
+      } catch (e) {
+        state.notify({
+          type: MESSAGES.EVAL_RESULT,
+          error: e.toString(),
+        });
+      }
+    }
+  });
+};
+main();
+
+// -- a bit of some hacky ui code --
+
+const codeMirrorConfig = {
+  lineNumbers: true,
+};
+const instructionsEl = document.getElementById("instructions");
+const instructionsEditorEl = CodeMirror.fromTextArea(
+  instructionsEl,
+  codeMirrorConfig
+);
+
+const compileButton = document.getElementById("compile");
+const evalButton = document.getElementById("eval");
+const evalStatusEl = document.getElementById("eval_status");
+const compileStatusEl = document.getElementById("compile_status");
+const compiledEl = document.getElementById("compiled");
+const compiledEditorEl = CodeMirror.fromTextArea(compiledEl, codeMirrorConfig);
+const godelSequenceEl = document.getElementById("godel_sequence");
+const godelNumberEl = document.getElementById("godel_number");
+const godelNumberComputeBtn = document.getElementById("godel_number_comp");
+const copyStateButton = document.getElementById("copy");
+
+// hackily copy the program state and put it in the clipboard
+copyStateButton.addEventListener("click", () => {
+  const instructions = btoa(instructionsEditorEl.getValue());
+
+  navigator.clipboard
+    .writeText(
+      window.location.href.split("?")[0] + `?instructions=${instructions}`
+    )
+    .then(() => alert("copied to clipboard"));
+});
+
+state.subscribe((msg) => {
+  if (msg.type == MESSAGES.COMPILE_RESULT) {
+    evalStatusEl.classList.remove("error");
+    evalStatusEl.classList.remove("success");
+    evalStatusEl.innerHTML = "";
+
+    if (msg.success) {
+      const { js, godelSequence } = msg;
+      compiledEditorEl.setValue(js);
+
+      godelSequenceEl.innerHTML = `[${godelSequence.join(", ")}]`;
+      godelNumberComputeBtn.style.display = "inline";
+
+      compileStatusEl.classList.add("success");
+      compileStatusEl.classList.remove("error");
+      compileStatusEl.innerHTML = `Successful compile at ${new Date().toLocaleString()}!`;
+    } else if (msg.error) {
+      compiledEditorEl.setValue("");
+      godelSequenceEl.innerHTML = "";
+      godelNumberEl.innerHTML = "";
+      godelNumberComputeBtn.style.display = "none";
+
+      compileStatusEl.classList.remove("success");
+      compileStatusEl.classList.add("error");
+      compileStatusEl.innerHTML = msg.error;
+    }
+  }
+});
+
+state.subscribe((msg) => {
+  if (msg.type == MESSAGES.COMPILE_RESULT) {
+    if (msg.success) {
+      const { godelSequence } = msg;
+
+      godelNumberComputeBtn.onclick = () => {
+        godelNumberEl.innerHTML = "working...";
+
+        const worker = new Worker("js/godelWorker.js");
+
+        worker.addEventListener("message", (e) => {
+          const godelNumber = e.data;
+          godelNumberEl.innerHTML = godelNumber.toString();
+        });
+
+        worker.postMessage(godelSequence);
+      };
+    } else if (msg.error) {
+      godelNumberComputeBtn.onclick = () => {};
+    }
+  }
+});
+
+state.subscribe((msg) => {
+  if (msg.type == MESSAGES.EVAL_RESULT) {
+    if (msg.success) {
+      evalStatusEl.classList.add("success");
+      evalStatusEl.classList.remove("error");
+      evalStatusEl.innerHTML = `Result: ${msg.value}`;
+    } else if (msg.error) {
+      evalStatusEl.classList.remove("success");
+      evalStatusEl.classList.add("error");
+      evalStatusEl.innerHTML = msg.error;
+    }
+  }
+});
+
+const urlParams = new URLSearchParams(window.location.search);
+if (urlParams.get("instructions")) {
+  instructionsEditorEl.setValue(atob(urlParams.get("instructions")));
+}
+
+compileButton.addEventListener("click", () => {
+  state.notify({
+    type: MESSAGES.COMPILE,
+    value: instructionsEditorEl.getValue(),
+  });
+});
+
+evalButton.addEventListener("click", () => {
+  state.notify({
+    type: MESSAGES.EVAL,
+  });
+});