Add CodeTranslation blueprint

Author: gopal-raj-suresh

CodeTranslation/.env.example

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+# Backend API Configuration
+BACKEND_PORT=5001
+
+# Keycloak Authentication
+BASE_URL=https://your-enterprise-api.com
+KEYCLOAK_CLIENT_ID=api
+KEYCLOAK_CLIENT_SECRET=your-client-secret
+
+# Model Configuration - CodeLlama-34b-instruct
+INFERENCE_MODEL_ENDPOINT=CodeLlama-34b-Instruct-hf
+INFERENCE_MODEL_NAME=codellama/CodeLlama-34b-Instruct-hf
+
+# LLM Settings
+LLM_TEMPERATURE=0.2
+LLM_MAX_TOKENS=4096
+
+# Code Translation Settings
+MAX_CODE_LENGTH=10000
+MAX_FILE_SIZE=10485760
+
+# CORS Configuration
+CORS_ALLOW_ORIGINS=["http://localhost:5173", "http://localhost:3000"]

CodeTranslation/.gitignore

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+# Environment variables
+.env
+.env.local
+.env.production
+.env.*.local
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+venv/
+env/
+ENV/
+.venv
+
+# Node
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+.npm
+.yarn
+package-lock.json
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Build outputs
+dist/
+*.log
+
+# Temporary files
+*.tmp
+tmp/
+temp/

CodeTranslation/README.md

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+## Code Translation
+
+A full-stack code translation application that converts code between programming languages using AI.
+The system integrates a FastAPI backend powered by CodeLlama-34b-instruct, alongside a modern React + Vite + Tailwind CSS frontend for an intuitive translation experience.
+
+## Table of Contents
+
+- [Project Overview](#project-overview)
+- [Features](#features)
+- [Architecture](#architecture)
+- [Prerequisites](#prerequisites)
+- [Quick Start Deployment](#quick-start-deployment)
+- [User Interface](#user-interface)
+- [Troubleshooting](#troubleshooting)
+
+---
+
+## Project Overview
+
+The **Code Translation** application demonstrates how large language models can be used to translate code between different programming languages. It accepts source code in one language, processes it through CodeLlama-34b-instruct, and returns translated code in the target language. This project integrates seamlessly with cloud-hosted APIs or local model endpoints, offering flexibility for research, enterprise, or educational use.
+
+---
+
+## Features
+
+**Backend**
+
+- Code translation between 6 languages (Java, C, C++, Python, Rust, Go)
+- PDF code extraction with pattern recognition
+- CodeLlama-34b-instruct for accurate translations
+- Enterprise inference endpoints
+- Keycloak authentication for secure API access
+- Comprehensive error handling and logging
+- File validation and size limits
+- CORS enabled for web integration
+- Health check endpoints
+- Modular architecture (config + models + services)
+
+**Frontend**
+
+- Side-by-side code comparison interface
+- Language selection dropdowns (6 languages)
+- PDF file upload with drag-and-drop support
+- Real-time character counter with limits
+- Modern, responsive design with Tailwind CSS
+- Built with Vite for fast development
+- Live status updates
+- Copy to clipboard functionality
+- Mobile-friendly
+
+---
+
+## Architecture
+
+Below is the architecture as it consists of a server that waits for code input or PDF uploads. Once code is provided, the server calls the CodeLlama model to translate the code to the target language.
+
+```mermaid
+  graph TB
+      subgraph "User Interface"
+          A[React Frontend<br/>Port 3000]
+          A1[Code Input]
+          A2[PDF Upload]
+          A3[Language Selection]
+      end
+
+      subgraph "FastAPI Backend"
+          B[API Server<br/>Port 5001]
+          C[PDF Service]
+          D[API Client]
+      end
+
+      subgraph "External Services"
+          E[Keycloak Auth]
+          F[CodeLlama-34b Model]
+      end
+
+      A1 --> B
+      A2 --> B
+      A3 --> B
+      B --> C
+      C -->|Extracted Code| B
+      B --> D
+      D -->|Get Token| E
+      E -->|Access Token| D
+      D -->|Translate Code + Token| F
+      F -->|Translated Code| D
+      D --> B
+      B --> A
+
+      style A fill:#e1f5ff
+      style B fill:#fff4e1
+      style F fill:#e1ffe1
+```
+
+This application is built with enterprise inference capabilities using Keycloak for authentication and CodeLlama-34b-instruct for code translation.
+
+**Service Components:**
+
+1. **React Web UI (Port 3000)** -  Provides side-by-side code comparison interface with language selection, PDF upload, and real-time translation results
+
+2. **FastAPI Backend (Port 5001)** -  Handles code validation, PDF extraction, Keycloak authentication, and orchestrates code translation through CodeLlama model
+
+**Typical Flow:**
+
+1. User enters code or uploads a PDF through the web UI.
+2. The backend validates the input and extracts code if needed.
+3. The backend authenticates with Keycloak and calls CodeLlama model.
+4. The model translates the code to the target language.
+5. The translated code is returned and displayed to the user.
+6. User can copy the translated code with one click.
+
+---
+
+## Prerequisites
+
+### System Requirements
+
+Before you begin, ensure you have the following installed:
+
+- **Docker and Docker Compose**
+- **Enterprise inference endpoint access** (Keycloak authentication)
+
+### Verify Docker Installation
+
+```bash
+# Check Docker version
+docker --version
+
+# Check Docker Compose version
+docker compose version
+
+# Verify Docker is running
+docker ps
+```
+---
+
+## Quick Start Deployment
+
+### Clone the Repository
+
+```bash
+git clone https://github.com/opea-project/GenAIExamples.git
+cd GenAIExamples/CodeTranslation
+```
+
+### Set up the Environment
+
+This application requires an `.env` file in the root directory for proper configuration. Create it with the commands below:
+
+```bash
+# Create the .env file
+cat > .env << EOF
+# Backend API Configuration
+BACKEND_PORT=5001
+
+# Required - Enterprise/Keycloak Configuration
+BASE_URL=https://api.example.com
+KEYCLOAK_CLIENT_ID=api
+KEYCLOAK_CLIENT_SECRET=your_client_secret
+
+# Required - Model Configuration
+INFERENCE_MODEL_ENDPOINT=CodeLlama-34b-Instruct-hf
+INFERENCE_MODEL_NAME=codellama/CodeLlama-34b-Instruct-hf
+
+# LLM Settings
+LLM_TEMPERATURE=0.2
+LLM_MAX_TOKENS=4096
+
+# Code Translation Settings
+MAX_CODE_LENGTH=10000
+MAX_FILE_SIZE=10485760
+
+# CORS Configuration
+CORS_ALLOW_ORIGINS=["http://localhost:5173", "http://localhost:3000"]
+EOF
+```
+
+Or manually create `.env` with:
+
+```bash
+# Backend API Configuration
+BACKEND_PORT=5001
+
+# Required - Enterprise/Keycloak Configuration
+BASE_URL=https://api.example.com
+KEYCLOAK_CLIENT_ID=api
+KEYCLOAK_CLIENT_SECRET=your_client_secret
+
+# Required - Model Configuration
+INFERENCE_MODEL_ENDPOINT=CodeLlama-34b-Instruct-hf
+INFERENCE_MODEL_NAME=codellama/CodeLlama-34b-Instruct-hf
+
+# LLM Settings
+LLM_TEMPERATURE=0.2
+LLM_MAX_TOKENS=4096
+
+# Code Translation Settings
+MAX_CODE_LENGTH=10000
+MAX_FILE_SIZE=10485760
+
+# CORS Configuration
+CORS_ALLOW_ORIGINS=["http://localhost:5173", "http://localhost:3000"]
+```
+
+**Note**: The docker-compose.yaml file automatically loads environment variables from `.env` for the backend service.
+
+### Running the Application
+
+Start both API and UI services together with Docker Compose:
+
+```bash
+# From the CodeTranslation directory
+docker compose up --build
+
+# Or run in detached mode (background)
+docker compose up -d --build
+```
+
+The API will be available at: `http://localhost:5001`  
+The UI will be available at: `http://localhost:3000`
+
+**View logs**:
+
+```bash
+# All services
+docker compose logs -f
+
+# Backend only
+docker compose logs -f backend
+
+# Frontend only
+docker compose logs -f frontend
+```
+
+**Verify the services are running**:
+
+```bash
+# Check API health
+curl http://localhost:5001/health
+
+# Check if containers are running
+docker compose ps
+```
+
+## User Interface
+
+**Using the Application**
+
+Make sure you are at the localhost:3000 url
+
+You will be directed to the main page which has each feature
+
+![User Interface](images/ui.png)
+
+The interface provides:
+
+Translate code:
+
+- Select source language from dropdown (Java, C, C++, Python, Rust, Go)
+- Select target language from dropdown
+- Enter or paste your code in the left textarea
+- Click "Translate Code" button
+- View translated code in the right textarea
+- Click "Copy" to copy the result
+
+Upload a PDF:
+
+- Scroll to the "Alternative: Upload PDF" section
+- Drag and drop a PDF file, or
+- Click "browse" to select a file
+- Wait for code extraction to complete
+- Extracted code appears in the source code box
+
+**UI Configuration**
+
+When running with Docker Compose, the UI automatically connects to the backend API. The frontend is available at `http://localhost:3000` and the API at `http://localhost:5001`.
+
+
+For production deployments, you may want to configure a reverse proxy or update the API URL in the frontend configuration.
+
+### Stopping the Application
+
+
+```bash
+docker compose down
+```
+
+---
+
+## Troubleshooting
+
+For comprehensive troubleshooting guidance, common issues, and solutions, refer to:
+
+[Troubleshooting Guide - TROUBLESHOOTING.md](./TROUBLESHOOTING.md)