Web Page Change Tracker

Phase 1 — Add, Remove, and Store Pages

• Implement a command-line interface or a graphical interface to add, delete, and modify tracked web pages
• Store pages in a local database (e.g., SQLite) with URL and last snapshot
• Validate URLs before saving

Functional result: User can manage a list of pages to track; database correctly stores added, deleted, and modified entries.

Phase 2 — Page Retrieval & Snapshot

• Fetch HTML content of each tracked page
• Save initial snapshot in the database
• Handle basic errors (network failures, invalid URLs)

Functional result: Program downloads and stores snapshots of all tracked pages; failed URLs are reported clearly.

Phase 3 — Change Detection

• Compare current page snapshot with the last saved version
• Detect changes recursively in the HTML content (e.g., new text, removed elements)
• Mark which parts of the page have been modified

Functional result: Program identifies when a page has changed and records differences; no false positives for unchanged pages.

Phase 4 — Notifications & Reporting

• Send email notifications to the user when a page has changed
• Include summary of changes in the message

Functional result: User receives email alerts when tracked pages are modified; console or log output lists the detected changes.