sanket3280/code-execution

1const axios = require('axios');2const Language = require('../models/Language');3 4// Note: HackerEarth supported languages endpoint reference placeholder.5// If an official endpoint is available, configure it via env. Else, maintain a curated map6const HE_LANG_ENDPOINT = process.env.HE_LANG_ENDPOINT || '';7 8// Fallback curated list to seed when endpoint is not available9const CURATED_LANGUAGES = [10  { heCode: 'JAVASCRIPT_NODE', displayName: 'JavaScript', version: 'Node', iconName: 'javascript' },11  { heCode: 'PYTHON3', displayName: 'Python', version: '3', iconName: 'python' },12  { heCode: 'JAVA17', displayName: 'Java', version: '17', iconName: 'java' },13  { heCode: 'CPP14', displayName: 'C++', version: '14', iconName: 'cpp' },14  { heCode: 'C', displayName: 'C', version: '', iconName: 'c' },15  { heCode: 'CSHARP', displayName: 'C#', version: '', iconName: 'csharp' },16];17 18async function fetchLanguagesFromHE() {19  if (!HE_LANG_ENDPOINT) return CURATED_LANGUAGES;20  try {21    const headers = {};22    if (process.env.CLIENT_SECRET) headers['client-secret'] = process.env.CLIENT_SECRET;23    const { data } = await axios.get(HE_LANG_ENDPOINT, { headers, timeout: 10000 });24    // Expect data to be an array of { code, displayName, version }25    const list = Array.isArray(data) ? data : (data.languages || []);26    return list.map((l) => ({27      heCode: l.code || l.heCode,28      displayName: l.displayName || l.name || l.title || l.code,29      version: l.version || '',30      iconName: l.iconName || '',31    }));32  } catch (err) {33    console.error('Failed to fetch HE languages, using curated fallback:', err.message);34    return CURATED_LANGUAGES;35  }36}37 38async function upsertLanguages(languages) {39  // Parallelize language upserts40  await Promise.all(41    languages.map(async (lang) => {42      try {43        const { heCode, displayName, version, iconName } = lang;44        // Upsert by heCode first; fallback to displayName+version45        let existing = await Language.findOne({ heCode });46        if (!existing && displayName) {47          existing = await Language.findOne({ displayName, version: version || '' });48        }49 50        if (existing) {51          existing.displayName = displayName || existing.displayName;52          existing.version = version || existing.version;53          if (iconName !== undefined) existing.iconName = iconName;54          await existing.save();55        } else {56          await Language.create({ heCode, displayName, version: version || '', iconName: iconName || '' });57        }58      } catch (e) {59        console.error('Language upsert error:', e.message);60      }61    })62  );63}64 65async function syncLanguages() {66  const langs = await fetchLanguagesFromHE();67  await upsertLanguages(langs);68  return await Language.find({}).lean();69}70 71async function getAllowedLanguagesForProblem(problemDoc) {72  const hasAllowList = Array.isArray(problemDoc.allowedLanguages) && problemDoc.allowedLanguages.length > 0;73  const allLangs = await Language.find({}).lean();74 75  // Compute allowed flag76  const allowedSet = new Set(hasAllowList ? problemDoc.allowedLanguages : []);77  const langsWithAllowed = allLangs.map(l => {78    const globallyEnabled = !!l.enabled;79    const allowed = hasAllowList ? (allowedSet.has(l.heCode) && globallyEnabled) : globallyEnabled;80    return {81      heCode: l.heCode,82      displayName: l.displayName,83      version: l.version,84      iconName: l.iconName,85      allowed86    };87  });88 89  // Sorting: allowed + popular first, then others alphabetically90  const popularOrder = ['JAVASCRIPT_NODE', 'PYTHON3', 'JAVA17', 'CPP14', 'C', 'CSHARP'];91  langsWithAllowed.sort((a, b) => {92    if (a.allowed !== b.allowed) return a.allowed ? -1 : 1;93    const ai = popularOrder.indexOf(a.heCode);94    const bi = popularOrder.indexOf(b.heCode);95    if (ai !== -1 || bi !== -1) {96      if (ai === -1) return 1;97      if (bi === -1) return -1;98      return ai - bi;99    }100    const an = (a.displayName || '').toLowerCase();101    const bn = (b.displayName || '').toLowerCase();102    return an.localeCompare(bn);103  });104 105  return langsWithAllowed;106}107 108module.exports = {109  syncLanguages,110  getAllowedLanguagesForProblem,111};112 113 114