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define([
"execute/javascript"
], function(javascript) {
var LANGUAGES = {
"javascript": javascript
};
var evalJS = function(lang, code, callback) {
var ready = false;
var finished = false;
var finish = function() {
if(finished) {
return console.error('Already finished');
}
finished = true;
return callback.apply(null, arguments);
};
var repl;
// Handles all our events
var eventHandler = function(data, eventType) {
console.log([eventType, data]);
switch(eventType) {
case 'progress':
// Update UI loading bar
break;
case 'timeout':
finish(new Error(data));
break;
case 'result':
finish(null, {
value: data,
type: 'result'
});
break;
case 'error':
if(ready) {
return finish(null, {
value: data,
type: 'error'
});
}
return finish(new Error(data));
break
case 'ready':
// We're good to get results and stuff back now
ready = true;
// Eval our code now that the runtime is ready
repl.eval(code);
break;
default:
console.log('Unhandled event =', eventType, 'data =', data);
}
};
repl = new lang.REPL({
input: eventHandler,
output: eventHandler,
result: eventHandler,
error: eventHandler,
progress: eventHandler,
timeout: {
time: 30000,
callback: eventHandler
}
});
repl.loadLanguage(lang.id, eventHandler);
};
var execute = function(lang, solution, validation, callback) {
// Check language is supported
if (!LANGUAGES[lang]) return callback(new Error("Language '"+lang+"' not available for execution"));
// Validate with validation code
var code = [solution, LANGUAGES[lang].assertCode, validation].join(";\n");
evalJS(LANGUAGES[lang], code, function(err, res) {
if(err) return callback(err);
if (res.type == "error") callback(new Error(res.value));
else callback(null, res.value);
});
};
return execute;
});
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