format naming by review and refactor the parse cookie function(includ…

…e if cn test) to make it more clear, also fixed a tiny bug before

lib/plugins/leetcode.js

@@ -471,8 +471,8 @@ plugin.deleteSession = function(session, cb) {
 };
 
 plugin.signin = function(user, cb) {
-  log.debug('running leetcode.signin');
-  const spin = h.spin('Signing in leetcode.com');
+  const isCN = config.app === 'leetcode.cn';
+  const spin = isCN ? h.spin('Signing in leetcode-cn.com') : h.spin('Signing in leetcode.com');
   request(config.sys.urls.login, function(e, resp, body) {
     spin.stop();
     e = plugin.checkError(e, resp, 200);
@@ -538,26 +538,18 @@ plugin.login = function(user, cb) {
   });
 };
 
-function parseCookie(cookie, cb) {
+function parseCookie(cookie, body, cb) {
+  const isCN = config.app === 'leetcode.cn';
   const SessionPattern = /LEETCODE_SESSION=(.+?)(;|$)/;
-  const csrfPattern = /csrftoken=(.+?)(;|$)/;
-  const reSessionResult = SessionPattern.exec(cookie);
-  const reCsrfResult = csrfPattern.exec(cookie);
-  if (reSessionResult === null || reCsrfResult === null) {
-    return cb('invalid cookie?');
+  let csrfPattern;
+  // leetcode-cn.com Cookie is not the same as leetcode.com in third parties
+  if (isCN) {
+    csrfPattern = /name="csrfmiddlewaretoken" value="(.*?)"/;
+  } else {
+    csrfPattern = /csrftoken=(.+?)(;|$)/;
   }
-  return {
-    sessionId:   reSessionResult[1],
-    sessionCSRF: reCsrfResult[1],
-  };
-}
-
-// leetcode-cn.com Cookie is not the same as leetcode.com in third parties
-function parseCNCookie(cookie, body, cb) {
-  const SessionPattern = /LEETCODE_SESSION=(.+?)(;|$)/;
-  const csrfPattern = /name="csrfmiddlewaretoken" value="(.*?)"/;
   const reSessionResult = SessionPattern.exec(cookie);
-  const reCsrfResult = csrfPattern.exec(body);
+  const reCsrfResult = csrfPattern.exec(isCN? body: cookie);
   if (reSessionResult === null || reCsrfResult === null) {
     return cb('invalid cookie?');
   }
@@ -567,16 +559,13 @@ function parseCNCookie(cookie, body, cb) {
   };
 }
 
-function requestLeetcodeAndSave(request, leetcodeUrl, user, cb, party) {
+function requestLeetcodeAndSave(request, leetcodeUrl, user, cb) {
   request.get({url: leetcodeUrl}, function(e, resp, body) {
     const redirectUri = resp.request.uri.href;
     if (redirectUri !== config.sys.urls.leetcode_redirect) {
-      return cb(`${party} login failed or ${party} did not connect to LeetCode`);
+      return cb('Login failed. Please make sure the credential is correct.');
     }
-    let cookieData = {};
-    if (leetcodeUrl.includes('cn')) {
-      cookieData = parseCNCookie(resp.request.headers.cookie, body, cb);
-    } else cookieData = parseCookie(resp.request.headers.cookie, cb);
+    const cookieData = parseCookie(resp.request.headers.cookie, body, cb);
     user.sessionId = cookieData.sessionId;
     user.sessionCSRF = cookieData.sessionCSRF;
     session.saveUser(user);
@@ -621,7 +610,6 @@ plugin.githubLogin = function(user, cb) {
         return cb('GitHub login failed');
       }
       if (resp.request.uri.href === urls.github_tf_redirect) {
-        cb('Your GitHub are using two-factor authentication');
         // read two-factor code must be sync.
         const twoFactorcode = require('prompt-sync')()('Please enter your two-factor code: ');
         const authenticityTokenTwoFactor = body.match(/name="authenticity_token" value="(.*?)"/);
@@ -645,10 +633,10 @@ plugin.githubLogin = function(user, cb) {
           if (resp.request.uri.href === urls.github_tf_session_request) {
             return cb('Invalid two-factor code please check');
           }
-          requestLeetcodeAndSave(_request, leetcodeUrl, user, cb, config.sys.login_methods.GitHub);
+          requestLeetcodeAndSave(_request, leetcodeUrl, user, cb);
         });
       } else {
-        requestLeetcodeAndSave(_request, leetcodeUrl, user, cb, config.sys.login_methods.GitHub);
+        requestLeetcodeAndSave(_request, leetcodeUrl, user, cb);
       }
     });
   });
@@ -689,7 +677,7 @@ plugin.linkedinLogin = function(user, cb) {
       if (resp.statusCode !== 200) {
         return cb('LinkedIn login failed');
       }
-      requestLeetcodeAndSave(_request, leetcodeUrl, user, cb, config.sys.login_methods.LinkedIn);
+      requestLeetcodeAndSave(_request, leetcodeUrl, user, cb);
     });
   });
 };