add files

src/ui/dialogs/Ui_login.py

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+# Form implementation generated from reading ui file '/home/alexander/GitHub/Semesterapparate/ui/dialogs/login.ui'
+#
+# Created by: PyQt6 UI code generator 6.5.3
+#
+# WARNING: Any manual changes made to this file will be lost when pyuic6 is
+# run again.  Do not edit this file unless you know what you are doing.
+
+
+import hashlib
+
+from PyQt6 import QtCore, QtWidgets
+
+from src.backend.database import Database
+from src.backend.admin_console import AdminCommands
+
+class Ui_Dialog(object):
+    def setupUi(self, Dialog):
+        Dialog.setObjectName("Dialog")
+        Dialog.resize(218, 190)
+        self.dialog = Dialog
+        self.login_button = QtWidgets.QPushButton(parent=Dialog)
+        self.login_button.setGeometry(QtCore.QRect(30, 140, 76, 32))
+        self.login_button.setObjectName("login_button")
+        self.login_button.setText("Login")
+        self.login_button.setFocusPolicy(QtCore.Qt.FocusPolicy.ClickFocus)
+        self.cancel_button = QtWidgets.QPushButton(parent=Dialog)
+        self.cancel_button.setGeometry(QtCore.QRect(120, 140, 76, 32))
+        self.cancel_button.setObjectName("cancel_button")
+        self.cancel_button.setText("Cancel")
+        self.cancel_button.setFocusPolicy(QtCore.Qt.FocusPolicy.ClickFocus)
+        self.cancel_button.clicked.connect(self.cancel_buttonfn)
+        self.label = QtWidgets.QLabel(parent=Dialog)
+        self.label.setGeometry(QtCore.QRect(20, 40, 71, 21))
+        self.label.setObjectName("label")
+        self.lineEdit = QtWidgets.QLineEdit(parent=Dialog)
+        self.lineEdit.setGeometry(QtCore.QRect(80, 40, 113, 21))
+        self.lineEdit.setObjectName("lineEdit")
+        # set strong focus to lineEdit
+        self.lineEdit.setFocusPolicy(QtCore.Qt.FocusPolicy.StrongFocus)
+        self.label_2 = QtWidgets.QLabel(parent=Dialog)
+        self.label_2.setGeometry(QtCore.QRect(20, 80, 71, 21))
+        self.label_2.setObjectName("label_2")
+        self.lineEdit_2 = QtWidgets.QLineEdit(parent=Dialog)
+        self.lineEdit_2.setGeometry(QtCore.QRect(80, 80, 113, 21))
+        self.lineEdit_2.setInputMethodHints(QtCore.Qt.InputMethodHint.ImhSensitiveData)
+        # set echo mode to password
+        self.lineEdit_2.setEchoMode(QtWidgets.QLineEdit.EchoMode.Password)
+        self.lineEdit_2.setClearButtonEnabled(True)
+        self.lineEdit_2.setObjectName("lineEdit_2")
+
+        self.retranslateUi(Dialog)
+        # if buttonbox accepted is clicked, launch login test
+        self.login_button.clicked.connect(self.login)
+        self.lresult = -1
+        self.lusername = ""
+        QtCore.QMetaObject.connectSlotsByName(Dialog)
+
+    def retranslateUi(self, Dialog):
+        _translate = QtCore.QCoreApplication.translate
+        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
+        self.label.setText(_translate("Dialog", "Username"))
+        self.label_2.setText(_translate("Dialog", "Password"))
+
+    def login(self):
+        username = self.lineEdit.text()
+        password = self.lineEdit_2.text()
+        print(type(username), password)
+        # Assuming 'Database' is a class to interact with your database
+        db = Database()  
+
+        hashed_password = hashlib.sha256(
+            password.encode()
+        ).hexdigest()
+        if len(db.get_users()) == 0:
+            AdminCommands().create_admin()
+            self.lresult = 1  # Indicate successful login
+            self.lusername = username
+            self.dialog.accept()
+        if db.login(username, hashed_password):
+            self.lresult = 1  # Indicate successful login
+            self.lusername = username
+            self.dialog.accept()
+            db.close()
+        else:
+            # Credentials are invalid, display a warning
+            if username == "" or password == "":
+                warning_dialog = QtWidgets.QMessageBox()
+                warning_dialog.setIcon(QtWidgets.QMessageBox.Icon.Warning)
+                warning_dialog.setText("Please enter a username and password.")
+                warning_dialog.setWindowTitle("Login Failed")
+                warning_dialog.exec()
+            else:
+                warning_dialog = QtWidgets.QMessageBox()
+                warning_dialog.setIcon(QtWidgets.QMessageBox.Icon.Warning)
+                warning_dialog.setText(
+                    "Invalid username or password. Please try again."
+                )
+                warning_dialog.setWindowTitle("Login Failed")
+                warning_dialog.exec()
+
+    def cancel_buttonfn(self):
+        self.dialog.reject()
+
+
+if __name__ == "__main__":
+    import sys
+
+    app = QtWidgets.QApplication(sys.argv)
+    Dialog = QtWidgets.QDialog()
+    ui = Ui_Dialog()
+    ui.setupUi(Dialog)
+    Dialog.show()
+    sys.exit(app.exec())