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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 program = compile(ast);
state.notify({
type: MESSAGES.COMPILE_RESULT,
value: program,
});
} catch (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,
value: result,
});
} catch (e) {
state.notify({
type: MESSAGES.EVAL_RESULT,
error: e.toString(),
});
}
}
});
};
main();
// -- a bit of some hacky ui code --
const instructionsEl = document.getElementById("instructions");
const instructionsEditorEl = CodeMirror.fromTextArea(instructionsEl, {
lineNumbers: true,
});
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, {
lineNumbers: true,
});
state.subscribe((msg) => {
if (msg.type == MESSAGES.COMPILE_RESULT) {
evalStatusEl.classList.remove("error");
evalStatusEl.classList.remove("success");
evalStatusEl.innerHTML = "";
if (typeof msg.value !== "undefined") {
compiledEditorEl.setValue(msg.value);
compileStatusEl.classList.add("success");
compileStatusEl.classList.remove("error");
compileStatusEl.innerHTML = `Successful compile at ${new Date().toLocaleString()}!`;
} else if (msg.error) {
compiledEditorEl.setValue("");
compileStatusEl.classList.remove("success");
compileStatusEl.classList.add("error");
compileStatusEl.innerHTML = msg.error;
}
}
});
state.subscribe((msg) => {
if (msg.type == MESSAGES.EVAL_RESULT) {
if (typeof msg.value !== "undefined") {
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")) {
editorEl.setValue(atob(urlParams.get("instructions")));
}
compileButton.addEventListener("click", () => {
state.notify({
type: MESSAGES.COMPILE,
value: instructionsEditorEl.getValue(),
});
});
evalButton.addEventListener("click", () => {
state.notify({
type: MESSAGES.EVAL,
});
});
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