Pseudo Code Generator | JavaScript

Flask Knowledge Graph Web Application

This pseudo code outlines a Flask web application for generating knowledge graphs, handling roadmaps, exporting data in various formats, and managing templates, along with real-time updates via WebSocket events.

Prompt

import os
from flask import Flask, request, jsonify, render_template, send_file
from flask_socketio import SocketIO, emit
from utils.nlp_processor import process_topic
from utils.graph_generator import generate_knowledge_graph
from utils.database import save_roadmap, load_roadmap
from utils.template_manager import list_templates, load_template
from chat_request import send_openai_request
from io import BytesIO
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter
from svglib.svglib import svg2rlg
from reportlab.graphics import renderPDF
from PIL import Image

app = Flask(__name__)
app.config['SECRET_KEY'] = 'secret!'
socketio = SocketIO(app)

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/generate', methods=['POST'])
def generate():
    topic = request.json['topic']
    subtopics = process_topic(topic)
    graph_data = generate_knowledge_graph(topic, subtopics)
    return jsonify(graph_data)

@app.route('/save', methods=['POST'])
def save():
    roadmap_data = request.json
    roadmap_id = save_roadmap(roadmap_data)
    return jsonify({'id': roadmap_id})

@app.route('/load/', methods=['GET'])
def load(roadmap_id):
    roadmap_data = load_roadmap(roadmap_id)
    if 'error' in roadmap_data:
        return jsonify(roadmap_data), 404 if roadmap_data['error'] == 'Roadmap not found' else 400
    return jsonify(roadmap_data)

@app.route('/export/pdf', methods=['POST'])
def export_pdf():
    svg_data = request.json['svg']
    buffer = BytesIO()
    drawing = svg2rlg(BytesIO(svg_data.encode('utf-8')))
    renderPDF.drawToFile(drawing, buffer)
    buffer.seek(0)
    return send_file(buffer, as_attachment=True, download_name='mindmap.pdf', mimetype='application/pdf')

@app.route('/export/image', methods=['POST'])
def export_image():
    svg_data = request.json['svg']
    buffer = BytesIO()
    drawing = svg2rlg(BytesIO(svg_data.encode('utf-8')))
    img = Image.open(BytesIO(renderPDF.drawToString(drawing)))
    img.save(buffer, format='PNG')
    buffer.seek(0)
    return send_file(buffer, as_attachment=True, download_name='mindmap.png', mimetype='image/png')

@app.route('/export/html', methods=['POST'])
def export_html():
    graph_data = request.json['graph_data']
    html_content = render_template('export.html', graph_data=graph_data)
    return jsonify({'html': html_content})

@app.route('/templates', methods=['GET'])
def get_templates():
    templates = list_templates()
    return jsonify(templates)

@app.route('/templates/', methods=['GET'])
def get_template(name):
    template_data = load_template(name)
    if template_data:
        return jsonify(template_data)
    return jsonify({'error': 'Template not found'}), 404

@socketio.on('connect')
def handle_connect():
    print('Client connected')

@socketio.on('disconnect')
def handle_disconnect():
    print('Client disconnected')

@socketio.on('update_node')
def handle_update_node(data):
    emit('node_updated', data, broadcast=True)

@socketio.on('add_node')
def handle_add_node(data):
    emit('node_added', data, broadcast=True)

@socketio.on('delete_node')
def handle_delete_node(data):
    emit('node_deleted', data, broadcast=True)

if __name__ == '__main__':
    socketio.run(app, host='0.0.0.0', port=5000, debug=True)

Answer

Pseudo Code Representation of Flask Application

Overview

The code provided is a Flask web application that serves various endpoints for generating knowledge graphs, saving/loading roadmaps, exporting different formats, and managing templates. It also includes socket events for real-time updates. Below is the pseudo code representation outlining the main logic and functionality.

Pseudo Code

Initialization

FUNCTION initialize_app():
    CREATE Flask application instance
    SET app configuration (SECRET_KEY)
    INITIALIZE SocketIO with the Flask app

    RETURN app, socketio

Route Definitions

Home Page

FUNCTION define_routes(app):
    @app.route('/')
    FUNCTION index():
        RETURN render HTML template 'index.html'

Generate Knowledge Graph

    @app.route('/generate', methods=['POST'])
    FUNCTION generate():
        READING JSON request body for 'topic'
        subtopics = process_topic(topic)
        graph_data = generate_knowledge_graph(topic, subtopics)
        RETURN JSON response with graph_data

Save Roadmap

    @app.route('/save', methods=['POST'])
    FUNCTION save():
        roadmap_data = READING JSON request body
        roadmap_id = save_roadmap(roadmap_data)
        RETURN JSON response with roadmap_id

Load Roadmap

    @app.route('/load/', methods=['GET'])
    FUNCTION load(roadmap_id):
        roadmap_data = load_roadmap(roadmap_id)
        IF 'error' in roadmap_data:
            RETURN JSON response with error and HTTP status code
        RETURN JSON response with roadmap_data

Export as PDF

    @app.route('/export/pdf', methods=['POST'])
    FUNCTION export_pdf():
        svg_data = READING JSON request body for 'svg'
        buffer = NEW BytesIO instance
        drawing = convert SVG to reportlab drawing
        renderPDF.drawToFile(drawing, buffer)
        buffer.seek(0)
        RETURN file from buffer as PDF

Export as Image

    @app.route('/export/image', methods=['POST'])
    FUNCTION export_image():
        svg_data = READING JSON request body for 'svg'
        buffer = NEW BytesIO instance
        drawing = convert SVG to reportlab drawing
        img = convert drawing to image
        img.save(buffer, format='PNG')
        buffer.seek(0)
        RETURN file from buffer as PNG

Export as HTML

    @app.route('/export/html', methods=['POST'])
    FUNCTION export_html():
        graph_data = READING JSON request body
        html_content = render HTML template 'export.html' with graph_data
        RETURN JSON response with html_content

Template Management

    @app.route('/templates', methods=['GET'])
    FUNCTION get_templates():
        templates = list_templates()
        RETURN JSON response with templates
    
    @app.route('/templates/', methods=['GET'])
    FUNCTION get_template(name):
        template_data = load_template(name)
        IF template_data is None:
            RETURN JSON response with error 'Template not found'
        RETURN JSON response with template_data

WebSocket Events

@socketio.on('connect')
FUNCTION handle_connect():
    PRINT 'Client connected'

@socketio.on('disconnect')
FUNCTION handle_disconnect():
    PRINT 'Client disconnected'

@socketio.on('update_node')
FUNCTION handle_update_node(data):
    emit 'node_updated' with data to all clients

@socketio.on('add_node')
FUNCTION handle_add_node(data):
    emit 'node_added' with data to all clients

@socketio.on('delete_node')
FUNCTION handle_delete_node(data):
    emit 'node_deleted' with data to all clients

Application Execution

IF __name__ == '__main__':
    RUN socketio app on specified host and port with debug mode

Conclusion

This pseudo code provides a clear and simplified representation of the logic implemented in the original Flask application. Each function and route is described in a manner that highlights the steps and structures used in the application, facilitating understanding and documentation.