Create Contact-Book.py

Author: rogers-cyber

19-Contact-book-CLI/Contact-Book.py

@@ -0,0 +1,191 @@
+import os
+import json
+import re
+
+# =========================
+# Globals
+# =========================
+contacts_file = "contacts.json"
+contacts = {}
+
+# =========================
+# Helper Functions
+# =========================
+def load_contacts():
+    global contacts
+    if os.path.exists(contacts_file):
+        with open(contacts_file, "r", encoding="utf-8") as f:
+            contacts = json.load(f)
+    else:
+        contacts = {}
+
+def save_contacts():
+    with open(contacts_file, "w", encoding="utf-8") as f:
+        json.dump(contacts, f, indent=4)
+
+def display_contacts(filter_term=None):
+    if not contacts:
+        print("\nNo contacts available.\n")
+        return
+    
+    print("\nContacts List:")
+    print("-" * 40)
+    for name, info in contacts.items():
+        if filter_term and filter_term.lower() not in name.lower():
+            continue
+        print(f"Name: {name}")
+        print(f"  Phone: {info.get('phone', 'N/A')}")
+        print(f"  Email: {info.get('email', 'N/A')}")
+        print("-" * 40)
+    print()
+
+def add_contact():
+    name = input("Enter name: ").strip()
+    if not name:
+        print("Name cannot be empty!")
+        return
+    phone = input("Enter phone: ").strip()
+    email = input("Enter email: ").strip()
+    
+    contacts[name] = {"phone": phone, "email": email}
+    save_contacts()
+    print(f"Contact '{name}' added successfully.\n")
+
+def update_contact():
+    name = input("Enter the name of the contact to update: ").strip()
+    if name not in contacts:
+        print(f"No contact found with name '{name}'\n")
+        return
+    
+    print("Leave blank to keep current value.")
+    phone = input(f"Enter new phone [{contacts[name].get('phone','')}]: ").strip()
+    email = input(f"Enter new email [{contacts[name].get('email','')}]: ").strip()
+    
+    if phone:
+        contacts[name]['phone'] = phone
+    if email:
+        contacts[name]['email'] = email
+    
+    save_contacts()
+    print(f"Contact '{name}' updated successfully.\n")
+
+def delete_contact():
+    name = input("Enter the name of the contact to delete: ").strip()
+    if name not in contacts:
+        print(f"No contact found with name '{name}'\n")
+        return
+    confirm = input(f"Are you sure you want to delete '{name}'? (y/n): ").strip().lower()
+    if confirm == 'y':
+        contacts.pop(name)
+        save_contacts()
+        print(f"Contact '{name}' deleted.\n")
+    else:
+        print("Deletion canceled.\n")
+
+def search_contacts():
+    term = input("Enter search term: ").strip()
+    if not term:
+        print("Search term cannot be empty!\n")
+        return
+    display_contacts(filter_term=term)
+
+# =========================
+# Bulk Search & Replace
+# =========================
+def bulk_search_replace():
+    global contacts  # << Move this to the top
+    if not contacts:
+        print("\nNo contacts available for bulk search & replace.\n")
+        return
+
+    print("\n--- Bulk Search & Replace ---")
+    field = input("Choose field to update (name/phone/email): ").strip().lower()
+    if field not in ['name', 'phone', 'email']:
+        print("Invalid field. Choose 'name', 'phone', or 'email'.")
+        return
+
+    search_text = input("Enter text to search: ").strip()
+    replace_text = input("Enter replacement text: ").strip()
+
+    if not search_text:
+        print("Search text cannot be empty!")
+        return
+
+    # Keep track of changes for preview
+    changes = []
+    updated_contacts = {}
+
+    for name, info in contacts.items():
+        if field == "name":
+            if re.search(re.escape(search_text), name, re.IGNORECASE):
+                new_name = re.sub(re.escape(search_text), replace_text, name, flags=re.IGNORECASE)
+                updated_contacts[new_name] = info
+                changes.append(f"{name} -> {new_name}")
+            else:
+                updated_contacts[name] = info
+        else:
+            value = info.get(field, "")
+            if re.search(re.escape(search_text), value, re.IGNORECASE):
+                new_value = re.sub(re.escape(search_text), replace_text, value, flags=re.IGNORECASE)
+                info[field] = new_value
+                changes.append(f"{name}: {field} -> {new_value}")
+            updated_contacts[name] = info
+
+    if not changes:
+        print("No matches found for the given search text.\n")
+        return
+
+    # Preview changes
+    print("\nPreview of changes:")
+    print("-" * 40)
+    for change in changes:
+        print(change)
+    print("-" * 40)
+
+    confirm = input("Apply these changes? (y/n): ").strip().lower()
+    if confirm == 'y':
+        contacts = updated_contacts
+        save_contacts()
+        print(f"{len(changes)} changes applied successfully.\n")
+    else:
+        print("Bulk replacement canceled.\n")
+
+# =========================
+# Main Menu
+# =========================
+def main_menu():
+    load_contacts()
+    while True:
+        print("\n=== Contact Book CLI ===")
+        print("1. Display all contacts")
+        print("2. Add contact")
+        print("3. Update contact")
+        print("4. Delete contact")
+        print("5. Search contacts")
+        print("6. Bulk Search & Replace")
+        print("7. Exit")
+        choice = input("Choose an option [1-7]: ").strip()
+        
+        if choice == '1':
+            display_contacts()
+        elif choice == '2':
+            add_contact()
+        elif choice == '3':
+            update_contact()
+        elif choice == '4':
+            delete_contact()
+        elif choice == '5':
+            search_contacts()
+        elif choice == '6':
+            bulk_search_replace()
+        elif choice == '7':
+            print("Exiting Contact Book. Goodbye!")
+            break
+        else:
+            print("Invalid choice. Please enter a number between 1 and 7.\n")
+
+# =========================
+# Run Program
+# =========================
+if __name__ == "__main__":
+    main_menu()