feat: Create initial Flask API for text analysis

[GYFX35]

This commit introduces a basic Flask application to serve as a backend for text analysis. It is designed to be called by mobile applications (Android/iOS) to check text for potential security threats.

The application includes:

• A root endpoint for health checks.
• An /analyze endpoint that accepts POST requests with JSON data.
• Placeholder logic for text analysis.
• A requirements.txt file for dependency management.

Summary by Sourcery

Introduce a basic Flask application to support text analysis via HTTP endpoints

New Features:

• Add root ""/"" endpoint for health checks
• Implement POST "/analyze" endpoint that validates JSON input and returns placeholder threat detection
• Include requirements.txt with Flask dependency for environment setup

[sourcery-ai]

Reviewer's Guide

Introduces a new Flask-based API for text analysis, defining health check and /analyze endpoints with JSON parsing, input validation, placeholder suspicious-text detection, and includes a requirements file for dependencies.

Sequence diagram for the /analyze endpoint interaction

sequenceDiagram
actor MobileApp
participant FlaskAPI
participant "Text Analysis Logic"
MobileApp->>FlaskAPI: POST /analyze {"text": "..."}
FlaskAPI->>FlaskAPI: Validate input
alt Invalid input
    FlaskAPI-->>MobileApp: 400 {"error": "Invalid input, 'text' field is required."}
else Valid input
    FlaskAPI->>"Text Analysis Logic": Analyze text
    "Text Analysis Logic"-->>FlaskAPI: is_suspicious
    FlaskAPI-->>MobileApp: 200 {"text": "...", "analysis": {"is_suspicious": true/false}}
end

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Class diagram for Flask API structure

classDiagram
    class FlaskApp {
        +hello()
        +analyze()
    }
    class Request {
        +get_json()
    }
    class Response {
        +jsonify()
    }
    FlaskApp <.. Request : uses
    FlaskApp <.. Response : uses

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File-Level Changes

Change	Details	Files
Initialize Flask application with health-check and analysis endpoints	Created Flask app instance in app.py Added root ('/') endpoint for health checks Implemented '/analyze' POST endpoint with JSON parsing and input validation Added placeholder logic to flag text containing 'phishing' Defined main entrypoint to run the server on 0.0.0.0:8080	text_message_analyzer/app.py
Introduce dependency management	Added requirements.txt listing Flask	text_message_analyzer/requirements.txt

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[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

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[guardrails]

⚠️ We detected 1 security issue in this pull request:

Vulnerable Libraries (1)

Severity	Details
N/A	pkg:pypi/flask@0.0.0 (t) upgrade to: 1.0

More info on how to fix Vulnerable Libraries in Python.

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