project-init
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#!/usr/bin/env python3
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"""
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Student Management System
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==========================
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Terminal CRUD application for STUDENT / GUARDIAN / ATTENDANCE, backed by
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MySQL on 10.0.1.40:3306 (student_db).
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On startup this:
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1. Connects to the MySQL server.
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2. Verifies (or creates) the student_db database.
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3. Verifies (or creates) the STUDENT, GUARDIAN and ATTENDANCE tables.
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4. Launches an interactive terminal menu for CRUD operations.
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Run:
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python3 main.py
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"""
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import sys
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import pymysql
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import crud
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import db
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from ui_helpers import (
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clear_hint,
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pause,
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print_table,
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prompt_attendance_status,
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prompt_date,
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prompt_guid,
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prompt_int,
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prompt_phone,
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prompt_str,
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)
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# ============================================================ GUARDIAN UI ==
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def menu_guardians(conn):
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while True:
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clear_hint()
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print("GUARDIAN MANAGEMENT")
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print(" 1. List all guardians")
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print(" 2. View a guardian")
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print(" 3. Add a guardian")
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print(" 4. Update a guardian")
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print(" 5. Delete a guardian")
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print(" 0. Back to main menu")
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choice = input("\nChoice: ").strip()
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try:
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if choice == "1":
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print()
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print_table(crud.list_guardians(conn))
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pause()
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elif choice == "2":
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guid = prompt_guid()
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row = crud.get_guardian(conn, guid)
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print()
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print_table([row] if row else [])
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pause()
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elif choice == "3":
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add_guardian(conn)
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elif choice == "4":
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update_guardian(conn)
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elif choice == "5":
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delete_guardian(conn)
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elif choice == "0":
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return
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else:
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print(" Invalid choice.")
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except crud.CrudError as e:
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print(f"\n [ERROR] {e}")
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pause()
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def add_guardian(conn):
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print("\n-- Add Guardian --")
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guid = prompt_guid()
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gname = prompt_str("Guardian name", max_len=20)
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gphone = prompt_phone()
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gaddress = prompt_str("Guardian address", max_len=30)
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crud.create_guardian(conn, guid, gname, gphone, gaddress)
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print(f" [OK] Guardian {guid} added.")
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pause()
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def update_guardian(conn):
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print("\n-- Update Guardian --")
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guid = prompt_guid()
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existing = crud.get_guardian(conn, guid)
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if not existing:
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print(" No guardian found with that GUID.")
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pause()
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return
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print(f" Current: {existing}")
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print(" (Press Enter to leave a field unchanged)")
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gname = prompt_str("New name", max_len=20, allow_blank_skip=True)
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gphone_raw = input("New phone (10 digits, blank = unchanged, 'clear' = remove): ").strip()
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gphone = existing["GPhone"]
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if gphone_raw.lower() == "clear":
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gphone = None
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elif gphone_raw:
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gphone = prompt_phone_validate(gphone_raw)
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if gphone is None:
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print(" Invalid phone — update aborted for that field.")
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gphone = existing["GPhone"]
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gaddress = prompt_str("New address", max_len=30, allow_blank_skip=True)
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crud.update_guardian(conn, guid, gname=gname, gphone=gphone, gaddress=gaddress)
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print(" [OK] Guardian updated.")
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pause()
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def prompt_phone_validate(raw):
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import re
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return raw if re.match(r"^\d{10}$", raw) else None
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def delete_guardian(conn):
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print("\n-- Delete Guardian --")
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guid = prompt_guid()
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confirm = input(f" Type 'yes' to confirm deleting guardian {guid}: ").strip().lower()
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if confirm != "yes":
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print(" Cancelled.")
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pause()
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return
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rows = crud.delete_guardian(conn, guid)
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if rows:
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print(" [OK] Guardian deleted.")
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else:
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print(" No guardian found with that GUID.")
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pause()
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# ============================================================= STUDENT UI ==
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def menu_students(conn):
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while True:
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clear_hint()
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print("STUDENT MANAGEMENT")
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print(" 1. List all students")
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print(" 2. View a student")
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print(" 3. Add a student")
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print(" 4. Update a student")
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print(" 5. Delete a student")
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print(" 0. Back to main menu")
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choice = input("\nChoice: ").strip()
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try:
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if choice == "1":
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print()
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print_table(crud.list_students(conn))
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pause()
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elif choice == "2":
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roll = prompt_int("Roll number", max_digits=3)
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row = crud.get_student(conn, roll)
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print()
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print_table([row] if row else [])
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pause()
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elif choice == "3":
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add_student(conn)
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elif choice == "4":
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update_student(conn)
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elif choice == "5":
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delete_student(conn)
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elif choice == "0":
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return
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else:
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print(" Invalid choice.")
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except crud.CrudError as e:
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print(f"\n [ERROR] {e}")
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pause()
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def add_student(conn):
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print("\n-- Add Student --")
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roll = prompt_int("Roll number (max 3 digits)", max_digits=3)
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sname = prompt_str("Student name", max_len=20)
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dob = prompt_date("Date of birth")
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print(" (Guardian must already exist — add them first via Guardian Management if needed)")
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guid = prompt_guid()
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crud.create_student(conn, roll, sname, dob, guid)
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print(f" [OK] Student {roll} added.")
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pause()
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def update_student(conn):
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print("\n-- Update Student --")
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roll = prompt_int("Roll number", max_digits=3)
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existing = crud.get_student(conn, roll)
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if not existing:
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print(" No student found with that roll number.")
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pause()
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return
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print(f" Current: {existing}")
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print(" (Press Enter to leave a field unchanged)")
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sname = prompt_str("New name", max_len=20, allow_blank_skip=True)
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dob = prompt_date("New date of birth", allow_blank_skip=True)
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guid = prompt_guid("New guardian GUID", allow_blank_skip=True)
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crud.update_student(conn, roll, sname=sname, sdateofbirth=dob, guid=guid)
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print(" [OK] Student updated.")
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pause()
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def delete_student(conn):
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print("\n-- Delete Student --")
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roll = prompt_int("Roll number", max_digits=3)
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confirm = input(f" Type 'yes' to confirm deleting student {roll} "
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f"(also deletes their attendance records): ").strip().lower()
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if confirm != "yes":
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print(" Cancelled.")
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pause()
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return
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rows = crud.delete_student(conn, roll)
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if rows:
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print(" [OK] Student deleted.")
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else:
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print(" No student found with that roll number.")
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pause()
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# =========================================================== ATTENDANCE UI ==
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def menu_attendance(conn):
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while True:
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clear_hint()
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print("ATTENDANCE MANAGEMENT")
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print(" 1. Mark / update attendance for a student")
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print(" 2. View attendance by date")
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print(" 3. View attendance history for a student")
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print(" 4. Delete an attendance record")
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print(" 0. Back to main menu")
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choice = input("\nChoice: ").strip()
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try:
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if choice == "1":
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mark_attendance(conn)
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elif choice == "2":
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d = prompt_date("Date")
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print()
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print_table(crud.list_attendance_by_date(conn, d))
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pause()
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elif choice == "3":
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roll = prompt_int("Roll number", max_digits=3)
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print()
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print_table(crud.list_attendance_by_student(conn, roll))
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pause()
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elif choice == "4":
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delete_attendance(conn)
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elif choice == "0":
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return
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else:
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print(" Invalid choice.")
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except crud.CrudError as e:
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print(f"\n [ERROR] {e}")
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pause()
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def mark_attendance(conn):
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print("\n-- Mark Attendance --")
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roll = prompt_int("Roll number", max_digits=3)
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if not crud.get_student(conn, roll):
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print(" No student found with that roll number.")
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pause()
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return
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d = prompt_date("Date")
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status = prompt_attendance_status()
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result = crud.mark_attendance(conn, d, roll, status)
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print(f" [OK] Attendance {result} for student {roll} on {d}: {status}")
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pause()
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def delete_attendance(conn):
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print("\n-- Delete Attendance Record --")
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roll = prompt_int("Roll number", max_digits=3)
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d = prompt_date("Date")
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confirm = input(" Type 'yes' to confirm: ").strip().lower()
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if confirm != "yes":
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print(" Cancelled.")
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pause()
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return
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rows = crud.delete_attendance(conn, d, roll)
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if rows:
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print(" [OK] Attendance record deleted.")
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else:
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print(" No matching attendance record found.")
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pause()
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# ================================================================ MAIN ====
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def main_menu(conn):
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while True:
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clear_hint()
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print("STUDENT MANAGEMENT SYSTEM")
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print(" 1. Guardian management")
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print(" 2. Student management")
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print(" 3. Attendance management")
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print(" 0. Exit")
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choice = input("\nChoice: ").strip()
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if choice == "1":
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menu_guardians(conn)
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elif choice == "2":
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menu_students(conn)
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elif choice == "3":
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menu_attendance(conn)
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elif choice == "0":
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print("\nGoodbye!")
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return
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else:
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print(" Invalid choice.")
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def main():
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print("=" * 60)
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print(" STUDENT MANAGEMENT SYSTEM - Startup")
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print("=" * 60)
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conn = db.get_connection()
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print("\nAll checks passed. Starting application...\n")
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try:
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main_menu(conn)
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except KeyboardInterrupt:
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print("\n\nInterrupted. Exiting.")
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except pymysql.err.MySQLError as e:
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print(f"\n[ERROR] Lost database connection: {e}")
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sys.exit(1)
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finally:
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conn.close()
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if __name__ == "__main__":
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main()
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