first commit

.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-19">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="lib" path="C:/Users/Acer/Downloads/mysql-connector-j-8.0.31.jar">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>courseManagementSystem</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+	<filteredResources>
+		<filter>
+			<id>1685697234452</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
+</projectDescription>

.settings/org.eclipse.core.resources.prefs

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+eclipse.preferences.version=1
+encoding/<project>=UTF-8

.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=19
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=19
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=19

src/courseManagementSystem/Auth.java

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+package courseManagementSystem;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+
+
+public class Auth {
+	private static PreparedStatement checkEmailStmt;
+	private static PreparedStatement retrieveRoleStmt;
+	private static PreparedStatement checkEmailExistenceStmt;
+	private static PreparedStatement addCredentialStmt;
+
+	private static PreparedStatement addCourseStmt;
+	private static PreparedStatement deleteCourseStmt;
+
+	private static PreparedStatement addModuleStmt;
+	private static PreparedStatement deleteModuleStmt;
+
+	private static PreparedStatement addTeachStmt;
+	private static PreparedStatement deleteTeachStmt;
+
+	private static PreparedStatement addResultsStmt;
+	private static PreparedStatement addComboItemsStmt;
+
+	public Auth(DbManager db) throws SQLException {
+		checkEmailStmt = db.getConnection().prepareStatement("SELECT count(*) FROM auth WHERE email=?");
+		retrieveRoleStmt = db.getConnection()
+				.prepareStatement("SELECT name,role FROM auth WHERE email=? AND BINARY password=?");
+		checkEmailExistenceStmt = db.getConnection().prepareStatement("SELECT email FROM auth WHERE email=?");
+		addCredentialStmt = db.getConnection()
+				.prepareStatement("INSERT INTO auth (name, email, phoneNo, role, password, course) VALUES (?,?,?,'Student',?,?)");
+
+		addCourseStmt = db.getConnection().prepareStatement("INSERT INTO courses(course_name) VALUES (?)");
+		deleteCourseStmt = db.getConnection().prepareStatement("DELETE FROM courses WHERE course_name = ?");
+
+		addModuleStmt = db.getConnection().prepareStatement("INSERT INTO modules(module_name, module_type, course_id) VALUES (?,?,?)");
+		deleteModuleStmt = db.getConnection().prepareStatement("DELETE FROM modules WHERE module_name = ?");
+
+		addTeachStmt =  db.getConnection().
+				prepareStatement("INSERT INTO auth (name, email, phoneNo, role, password, course) VALUES (?,?,?,'Teacher',?,?)");
+		deleteTeachStmt = db.getConnection().prepareStatement("DELETE FROM auth WHERE email = ?");
+
+		addResultsStmt = db.getConnection()
+				.prepareStatement("INSERT INTO results(`student_id`, `module_id`, `marks`) VALUES (?,?,?)");
+
+		addComboItemsStmt = db.getConnection()
+				.prepareStatement("SELECT course_name FROM courses");
+
+	}
+
+	public ArrayList<String> login(String email, String password) throws Exception {
+		ArrayList<String> arrayList = new ArrayList<String>();
+		try {
+			checkEmailStmt.setString(1, email);
+			ResultSet rs = checkEmailStmt.executeQuery();
+			int count = 0;
+			if (rs.next()) {
+			}
+				count = rs.getInt(1);
+			if (count == 0)
+				throw new Exception("No user with this email found!");
+			else {
+				retrieveRoleStmt.setString(1, email);
+				retrieveRoleStmt.setString(2, password);
+				rs = retrieveRoleStmt.executeQuery();
+				if (rs.next()) {
+					arrayList.add(rs.getString("name"));
+					arrayList.add(rs.getString("role"));
+					return arrayList;
+				} else
+					throw new Exception("Password not valid!");
+			}
+		} catch (SQLException e) {
+			System.out.println(e.getMessage());
+			throw new Exception("An error occurred while checking the email and password!");
+		}
+	}
+
+	public void addCredential(String name, String email, String password, String phoneNo, String comboBox) throws Exception {
+		try {
+			checkEmailExistenceStmt.setString(1, email);
+			ResultSet rs = checkEmailExistenceStmt.executeQuery();
+			if (rs.next()) {
+				throw new Exception("Email already in use!");
+			} else {
+				addCredentialStmt.setString(1, name);
+				addCredentialStmt.setString(2, email);
+				addCredentialStmt.setString(3, password);
+				addCredentialStmt.setString(4, phoneNo);
+				addCredentialStmt.setString(5, comboBox);
+				addCredentialStmt.executeUpdate();
+			}
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
+	}
+
+	public static void addCourse(String course_name) throws Exception {
+		try {	
+				addCourseStmt.setString(1,course_name);
+				addCourseStmt.executeUpdate();
+			}
+		 catch (SQLException e) {
+			 System.out.println(e.getMessage());
+				throw new Exception("An error occurred while adding new course!");
+
+		}
+	}
+
+	public static void deleteCourse(String course_name) throws Exception {
+	          try {
+	            deleteCourseStmt.setString(1, course_name);
+	            deleteCourseStmt.executeUpdate();
+	          } catch (SQLException e) {
+	            System.out.println(e.getMessage());
+	            throw new Exception("An error occurred trying to delete the course!");
+	          }
+	        }
+
+	public static void addModule(String module_name, String module_type, String course_ID) throws Exception {
+		try {	
+			addModuleStmt.setString(1,module_name);
+			addModuleStmt.setString(2,module_type);
+			addModuleStmt.setString(3,course_ID);
+			addModuleStmt.executeUpdate();
+			}
+		 catch (SQLException e) {
+			 System.out.println(e.getMessage());
+				throw new Exception("An error occurred while adding module!");
+
+		}
+	}
+
+	public static void deleteModule(String module_name) throws Exception {
+		try {	
+			deleteModuleStmt.setString(1,module_name);
+			deleteModuleStmt.executeUpdate();
+			}
+		 catch (SQLException e) {
+			 System.out.println(e.getMessage());
+				throw new Exception("An error occurred while deleting module!");
+
+		}
+	}
+
+	public static void addTeach(String name, String email, String password, String phoneNo, String comboBox) throws Exception {
+		try {
+			addTeachStmt.setString(1, name);
+			addTeachStmt.setString(2, email);
+			addTeachStmt.setString(3, password);
+			addTeachStmt.setString(4, phoneNo);
+			addTeachStmt.setString(5, comboBox);
+			addTeachStmt.executeUpdate();
+			}
+		  catch (SQLException e) {
+			  System.out.println(e.getMessage());
+				throw new Exception("An error occurred while adding teacher!");
+		}
+	}
+
+	public static void deleteTeach(String email) throws Exception {
+		try {	
+			deleteTeachStmt.setString(1,email);
+			deleteTeachStmt.executeUpdate();
+			}
+		 catch (SQLException e) {
+			 System.out.println(e.getMessage());
+				throw new Exception("An error occurred while deleting module!");
+
+		}
+	}
+
+
+	public static void addResults(String student_id, String module_id, String marks) throws Exception {
+		try {	
+			addResultsStmt.setString(1, student_id);
+			addResultsStmt.setString(2, module_id);
+			addResultsStmt.setString(3, marks);
+			addResultsStmt.executeUpdate();
+			}
+		 catch (SQLException e) {
+			 System.out.println(e.getMessage());
+				throw new Exception("An error occurred while deleting module!");
+
+		}
+	}
+
+	public PreparedStatement getAddComboItemsStmt() {
+	    return addComboItemsStmt;
+	  }
+}