📊 Text Analysis Web Application

This project is a full-stack web application developed to analyze user submitted text. It provides detailed insights such as word count, character count, readability score, and a frequency analysis of the most common words. The goal of the project was to practice building a RESTful API using ASP.NET Core, and making it a responsive JavaScript-based frontend interface.

🛠️ Technologies Used

Frontend

• HTML5 – For structural layout
• CSS3 – Custom styles and bar charts
• Vanilla JavaScript (ES6+) – Handles input validation, API requests, and dynamic rendering
• Bootstrap – Responsive layout and styled components

Backend

• ASP.NET Core Web API – Serves the /api/textanalysis endpoint
• C# – Business logic for text analysis
• Regex (System.Text.RegularExpressions) – Tokenization and sentence detection
• Swagger – Built-in API documentation and testing interface
• CORS configuration – Enables frontend-backend communication during development

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📊 Key Features

• 📝 Submit raw text via a single-page frontend interface
• 🔢 Statistics returned:
  • Word count
  • Character count (excluding whitespace)
  • Flesch Reading Ease index
  • Top 5 most frequent words
• 📉 Visual representation of word frequency
• 📐 Readability classification based on index:
  • Green = Easy
  • Orange = Medium
  • Red = Hard
• 📱 Responsive layout across all devices

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🧠 Backend Logic Overview

• Service Layer (TextAnalysisService.cs): Core analysis is handled here

  • Words are extracted using Regex

  • Syllables are estimated using a simplified vowel-counting heuristic

  • Sentences are split on punctuation (., !, ?)

  • Flesch Reading Ease formula:

    206.835 - 1.015 * (words / sentences) - 84.6 * (syllables / words)
    

• Controller Layer (TextAnalysisController.cs):

  • Exposes a single POST route
  • Accepts a JSON body containing the inputText
  • Returns a TextAnalysisResult object with computed data

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📁 Project Structure

TextAnalysisApp/
├── FRONTEND/                    # Static frontend files
│   ├── index.html               # Single-page UI
│   ├── css
│   │   └── style.css            # Custom styling + chart visuals
│   │   js
│   │   └── script.js            # Fetch call to backend, DOM rendering
├── BACKEND/                     # ASP.NET Core Web API
│   ├── Controllers/
│   │   └── TextAnalysisController.cs   # POST endpoint handler
│   ├── Services/
│   │   ├── ITextAnalysisService.cs     # Interface
│   │   └── TextAnalysisService.cs      # Implementation of core logic
│   ├── Models/
│   │   ├── TextAnalysisRequest.cs      # Input model
│   │   ├── TextAnalysisResult.cs       # Output model
│   │   └── WordFrequency.cs            # Word-frequency pair
│   └── Program.cs                      # Startup config, routing, CORS, Swagger