add third party github login for future updates in vscode-leetcode and somehow solve the recaptcha problem

Author: yihong0618

README.md

@@ -40,6 +40,7 @@ Great thanks to leetcode.com, a really awesome website!
 
 	Read help first                         $ leetcode help
 	Login with your leetcode account        $ leetcode user -l
+	Login with third party account--github  $ leetcode user -g
 	Cookie login with cookie                $ leetcode user -c
 	Browse all questions                    $ leetcode list
 	Choose one question                     $ leetcode show 1 -g -l cpp

lib/commands/user.js

@@ -27,6 +27,12 @@ const cmd = {
         default:  false,
         describe: 'cookieLogin'
       })
+      .option('g', {
+        alias:    'github',
+        type:     'boolean',
+        default:  false,
+        describe: 'githubLogin'
+      })
       .option('L', {
         alias:    'logout',
         type:     'boolean',
@@ -36,6 +42,7 @@ const cmd = {
       .example(chalk.yellow('leetcode user'), 'Show current user')
       .example(chalk.yellow('leetcode user -l'), 'User login')
       .example(chalk.yellow('leetcode user -c'), 'User Cookie login')
+      .example(chalk.yellow('leetcode user -g'), 'User Github login')
       .example(chalk.yellow('leetcode user -L'), 'User logout');
   }
 };
@@ -66,6 +73,21 @@ cmd.handler = function(argv) {
       log.info('Successfully logout as', chalk.yellow(user.name));
     else
       log.fail('You are not login yet?');
+  } else if (argv.github) {
+    // github 
+    prompt.colors = false;
+    prompt.message = '';
+    prompt.start();
+    prompt.get([
+      {name: 'login', required: true},
+      {name: 'pass', required: true, hidden: true}
+    ], function(e, user) {
+      if (e) return log.fail(e)
+      core.githubLogin(user, function(e, user) {
+      if (e) return log.fail(e);
+      log.info('Successfully github login as', chalk.yellow(user.name));
+      });
+    });
   } else if (argv.cookie) {
     // session
     prompt.colors = false;

lib/config.js

@@ -34,6 +34,8 @@ const DEFAULT_CONFIG = {
       base:            'https://leetcode.com',
       graphql:         'https://leetcode.com/graphql',
       login:           'https://leetcode.com/accounts/login/',
+      // third part login base urls. TODO facebook linkin google
+      github_login:    'https://leetcode.com/accounts/github/login/?next=%2F',
       problems:        'https://leetcode.com/api/problems/$category/',
       problem:         'https://leetcode.com/problems/$slug/description/',
       test:            'https://leetcode.com/problems/$slug/interpret_solution/',

lib/plugins/leetcode.js

@@ -51,7 +51,7 @@ plugin.checkError = function(e, resp, expectedStatus) {
 
 plugin.init = function() {
   config.app = 'leetcode';
-}
+};
 
 plugin.getProblems = function(cb) {
   log.debug('running leetcode.getProblems');
@@ -95,7 +95,7 @@ plugin.getCategoryProblems = function(category, cb) {
     }
 
     const problems = json.stat_status_pairs
-        .filter(p => !p.stat.question__hide)
+        .filter((p) => !p.stat.question__hide)
         .map(function(p) {
           return {
             state:    p.status || 'None',
@@ -167,7 +167,7 @@ plugin.getProblem = function(problem, cb) {
     problem.testable = q.enableRunCode;
     problem.templateMeta = JSON.parse(q.metaData);
     // @si-yao: seems below property is never used.
-    //problem.discuss =  q.discussCategoryId;
+    // problem.discuss =  q.discussCategoryId;
 
     return cb(null, problem);
   });
@@ -254,9 +254,9 @@ function formatResult(result) {
   };
 
   x.error = _.chain(result)
-    .pick((v, k) => /_error$/.test(k) && v.length > 0)
-    .values()
-    .value();
+      .pick((v, k) => /_error$/.test(k) && v.length > 0)
+      .values()
+      .value();
 
   if (/[runcode|interpret].*/.test(result.submission_id)) {
     // It's testing
@@ -374,8 +374,8 @@ plugin.starProblem = function(problem, starred, cb) {
     };
   } else {
     opts.url = config.sys.urls.favorite_delete
-      .replace('$hash', user.hash)
-      .replace('$id', problem.id);
+        .replace('$hash', user.hash)
+        .replace('$id', problem.id);
     opts.method = 'DELETE';
   }
 
@@ -508,7 +508,7 @@ plugin.signin = function(user, cb) {
 plugin.getUser = function(user, cb) {
   plugin.getFavorites(function(e, favorites) {
     if (!e) {
-      const f = favorites.favorites.private_favorites.find(f => f.name === 'Favorite');
+      const f = favorites.favorites.private_favorites.find((f) => f.name === 'Favorite');
       if (f) {
         user.hash = f.id_hash;
         user.name = favorites.user_name;
@@ -538,19 +538,68 @@ plugin.login = function(user, cb) {
   });
 };
 
-plugin.cookieLogin = function(user, cb) {
-  // re pattern for cookie chrome or firefox
+function parseCookie(cookie, cb) {
   const SessionPattern = /LEETCODE_SESSION=(.+?)(;|$)/;
   const csrfPattern = /csrftoken=(.+?)(;|$)/;
-  const reSessionResult = SessionPattern.exec(user.cookie);
-  const reCsrfResult = csrfPattern.exec(user.cookie);
+  const reSessionResult = SessionPattern.exec(cookie);
+  const reCsrfResult = csrfPattern.exec(cookie);
   if (reSessionResult === null || reCsrfResult === null) {
-    return cb('invalid cookie?')
+    return cb('invalid cookie?');
   }
-  user.sessionId = reSessionResult[1];
-  user.sessionCSRF = reCsrfResult[1];
+  return {
+    sessionId:   reSessionResult[1],
+    sessionCSRF: reCsrfResult[1],
+  };
+}
+
+plugin.cookieLogin = function(user, cb) {
+  const cookieData = parseCookie(user.cookie, cb);
+  user.sessionId = cookieData.sessionId;
+  user.sessionCSRF = cookieData.sessionCSRF;
   session.saveUser(user);
   plugin.getUser(user, cb);
-}
+};
+
+plugin.githubLogin = function(user, cb) {
+  const leetcodeUrl = config.sys.urls.github_login;
+  const _request = request.defaults({jar: true});
+  _request('https://github.com/login', function(e, resp, body) {
+    const authenticityToken = body.match(/name="authenticity_token" value="(.*?)"/);
+    if (authenticityToken === null) {
+      return cb('Get github token failed');
+    }
+    const options = {
+      url:     'https://github.com/session',
+      method:  'POST',
+      headers: {
+        'Content-Type': 'application/x-www-form-urlencoded',
+      },
+      followAllRedirects: true,
+      form:               {
+        'login':              user.login,
+        'password':           user.pass,
+        'authenticity_token': authenticityToken[1],
+        'utf8':               encodeURIComponent('✓'),
+        'commit':             encodeURIComponent('Sign in')
+      },
+    };
+    _request(options, function(e, resp, body) {
+      if (resp.statusCode !== 200) {
+        return cb('Github login failed');
+      }
+      _request.get({url: leetcodeUrl}, function(e, resp, body) {
+        const redirectUri = resp.request.uri.href;
+        if (redirectUri !== 'https://leetcode.com/') {
+          return cb('Github login failed or github did not link to leetcode');
+        }
+        const cookieData = parseCookie(resp.request.headers.cookie, cb);
+        user.sessionId = cookieData.sessionId;
+        user.sessionCSRF = cookieData.sessionCSRF;
+        session.saveUser(user);
+        plugin.getUser(user, cb);
+      });
+    });
+  });
+};
 
 module.exports = plugin;