Files
topos/src/Evaluator.ts
2023-08-13 19:36:15 +02:00

93 lines
2.5 KiB
TypeScript

import type { Editor } from "./main";
import type { File } from "./AppSettings";
const delay = (ms: number) =>
new Promise((_, reject) =>
setTimeout(() => reject(new Error("Operation took too long")), ms)
);
const tryCatchWrapper = (
application: Editor,
code: string
): Promise<boolean> => {
/**
* This function wraps a string of code in a try/catch block and returns a promise
* that resolves to true if the code is valid and false if the code is invalid after
* being evaluated.
*
* @param application - The main application instance
* @param code - The string of code to wrap and evaluate
* @returns A promise that resolves to true if the code is valid and false if the code is invalid
*/
return new Promise((resolve, _) => {
try {
Function(`with (this) {try{${code}} catch (e) {console.log(e)}};`).call(
application.api
);
resolve(true);
} catch (error) {
console.log(error);
resolve(false);
}
});
};
export const tryEvaluate = async (
/**
* This function attempts to evaluate a string of code in the context of user API.
* If the code is invalid, it will attempt to evaluate the previous valid code.
*
* @param application - The main application instance
* @param code - The set of files to evaluate
* @param timeout - The timeout in milliseconds
* @returns A promise that resolves to void
*
*/
application: Editor,
code: File,
timeout = 5000
): Promise<void> => {
try {
code.evaluations!++;
const isCodeValid = await Promise.race([
tryCatchWrapper(
application,
(`let i = ${code.evaluations};` + code.candidate) as string
),
delay(timeout),
]);
if (isCodeValid) {
code.committed = code.candidate;
} else {
await evaluate(application, code, timeout);
}
} catch (error) {
console.log(error);
}
};
export const evaluate = async (
application: Editor,
code: File,
timeout = 1000
): Promise<void> => {
/**
* This function evaluates a string of code in the context of user API.
*
* @param application - The main application instance
* @param code - The set of files to evaluate
* @param timeout - The timeout in milliseconds
* @returns A promise that resolves to void
*/
try {
await Promise.race([
tryCatchWrapper(application, code.committed as string),
delay(timeout),
]);
if (code.evaluations) code.evaluations++;
} catch (error) {
console.log(error);
}
};