pre async

directory.js

@@ -0,0 +1,77 @@
+let satitm_directory = require('./config/ldap.js');
+// Search for a user in the directory
+async function queryUser(upn, attributes) {
+  return new Promise((resolve, reject) => {
+    let opts = {
+      filter: `(userPrincipalName=${upn})`,
+      scope: 'sub',
+      attributes: attributes
+    };
+    satitm_directory.search('DC=ad,DC=satitm,DC=chula,DC=ac,DC=th', opts, function(err, ldapRes) {
+      ldapRes.on('searchEntry', function(entry) {
+        console.log('entry: ' + JSON.stringify(entry.object));
+        resolve(entry.object);
+      });
+      ldapRes.on('error', function(err) {
+        console.error('error: ' + err.message);
+        reject(err);
+      });
+      ldapRes.on('end', function(result) {
+        console.log('status: ' + result.status);
+      });
+    });
+  });
+}
+
+function setAttribute(upn, attribute, value, callback) {
+  // First, get DN of the user from the UPN
+  let attributes = ['dn'];
+  
+}
+
+// 0: Unkown, 1: Student, 2: Parent
+const USER_TYPE = {
+  UNKNOWN: 0,
+  STUDENT: 1,
+  PARENT: 2
+};
+
+// Determine the type of user
+// Student is in OU=Students,OU=Users,DC=ad,DC=satitm,DC=chula,DC=ac,DC=th 
+// Parent is in OU=Parents,OU=Users,DC=ad,DC=satitm,DC=chula,DC=ac,DC=th
+function getUserType(req, res) {
+  // The user's DN is present in the session as req.user.dn
+  // To convert DN to OU, remove from first CN= to first ,
+  let ou = req.user.dn.substring(req.user.dn.indexOf(',') + 1);
+  console.log('OU:', ou);
+  if (ou === 'OU=Students,DC=ad,DC=satitm,DC=chula,DC=ac,DC=th') {
+    return USER_TYPE.STUDENT;
+  }
+  else if (ou === 'OU=Parents,DC=ad,DC=satitm,DC=chula,DC=ac,DC=th') {
+    return USER_TYPE.PARENT;
+  }
+  else {
+    return USER_TYPE.UNKNOWN;
+  }
+}
+
+async function getPrimaryParent(student_upn, callback) {
+  return new Promise((resolve, reject) => {
+    // Query primaryParent attribute in the student's LDAP entry
+    let attributes = ['primaryParent'];
+    queryUser(student_upn, attributes, function(err, student) {
+      if (err) {
+        reject(err);
+      } else {
+        let primaryParent = student.primaryParent;
+        resolve(primaryParent);
+      }
+    });
+  });
+}
+
+module.exports = {
+    queryUser: queryUser,
+    getUserType: getUserType,
+    USER_TYPE: USER_TYPE
+};