log minizinc solutions

Author: hatemhosny

src/livecodes/languages/minizinc/lang-minizinc-script.ts

@@ -32,6 +32,14 @@ let hasRun = false;
 const pageLoaded = new Promise((resolve) => onLoad(resolve));
 const modPromise = import(minizincUrl);
 
+const getOutput = (solution: any) =>
+  solution?.output?.default ??
+  solution?.output?.dzn ??
+  solution?.output?.json ??
+  solution?.output?.raw ??
+  solution?.output ??
+  '';
+
 const run = (data: MiniZincData = {}) => {
   if (!MiniZinc) {
     throw new Error('MiniZinc is not initialized. await livecodes.minizinc.init() first.');
@@ -67,12 +75,22 @@ livecodes.minizinc = {
     await livecodes.minizinc.init();
     return new Promise((resolve) => {
       const solve = run(data);
+      let lastOutput = '';
       const errors: any[] = [];
       solve.on('error', (error: any) => {
+        const msg = `MiniZinc: ${error?.what ?? 'Error'}: ${error.message}`;
         // eslint-disable-next-line no-console
-        console.error(error);
+        console.error(msg);
         errors.push(error);
       });
+      solve.on('solution', (solution: any) => {
+        const output = getOutput(solution);
+        const line = '----------';
+        const msg = typeof output === 'string' ? output + line : output;
+        // eslint-disable-next-line no-console
+        console.log(msg);
+        lastOutput = output;
+      });
       solve.on('exit', (msg: any) => {
         if (msg.code === 0) return;
         if (errors.length) {
@@ -103,13 +121,8 @@ livecodes.minizinc = {
           ERROR: '=====ERROR=====',
         };
         const status = statusMap[result.status] || '';
-        const output =
-          result.solution?.output?.default ??
-          result.solution?.output?.dzn ??
-          result.solution?.output?.json ??
-          result.solution?.output?.raw ??
-          result.solution?.output ??
-          '';
+        const resultOutput = getOutput(result.solution);
+        const output = lastOutput === resultOutput ? '' : resultOutput;
         const msg = typeof output === 'string' ? output + status : output;
         // eslint-disable-next-line no-console
         console.log(msg);

src/livecodes/templates/starter/minizinc-starter.ts

@@ -156,7 +156,7 @@ cocoa = 500;
   },
   script: {
     language: 'minizinc',
-    content: `
+    content: String.raw`
 % from https://docs.minizinc.dev/en/stable/part_2_tutorial.html
 % Baking cakes for the school fete (with data file)
 
@@ -195,8 +195,8 @@ constraint 75 * c <= cocoa;
 solve maximize 400 * b + 450 * c;
 
 output [
-  "no. of banana cakes = \\(b)\\n",
-  "no. of chocolate cakes = \\(c)\\n"];
+  "no. of banana cakes = \(b)\n",
+  "no. of chocolate cakes = \(c)\n"];
 `.trimStart(),
   },
 };

src/livecodes/utils/utils.ts

@@ -689,7 +689,7 @@ export const onLoad = /* @__PURE__ */ (fn: (...args: any[]) => any) => {
   if (document.readyState === 'complete' || document.readyState === 'interactive') {
     fn();
   } else {
-    window.addEventListener('load', fn);
+    window.addEventListener('load', fn, { once: true });
   }
 };