app.py

from flask import Flask, request, jsonify, make_response
from flasgger import Swagger, swag_from
from vaderSentiment.vaderSentiment import SentimentIntensityAnalyzer
import random
import csv

app = Flask(__name__)
swagger = Swagger(app)

# Définition du titre de la documentation Swagger
app.config['SWAGGER'] = {
    'title': 'API Analyse de sentiment',
    'description': 'Documentation de l\'API pour l\'analyse de sentiment',
    'version': '1.0.0'
}

# Charger les informations d'authentification à partir du fichier credentials.csv
def load_credentials(file_path):
    credentials = {}
    with open(file_path, newline='') as csvfile:
        reader = csv.DictReader(csvfile)
        for row in reader:
            credentials[row['username']] = {'password': row['password'], 'v1': int(row['v1']), 'v2': int(row['v2'])}
    return credentials

credentials = load_credentials('credentials.csv')

# Route pour vérifier l'état de l'API
@app.route('/status')
def status():
    """
    API Status
    ---
    responses:
      200:
        description: API is working
        examples:
          message: 1
    """
    return '1'

  

# Route pour saluer l'utilisateur
@app.route('/welcome')
def welcome():
    """
    Message de bienvenue
    ---
    parameters:
      - name: username
        in: query
        type: string
        required: true
        description: Message de bienvenue à l'utilisateur
    responses:
      200:
        description: Message
        examples:
        message: Bienvenue sur l'API d'Analyse de sentiment, Olivier!
    """
    username = request.args.get('username')
    return f"Bienvenue sur l'API d'Analyse de sentiment {username}!"



# Route pour vérifier les credentials de l'utilisateur
@app.route('/credentials', methods=['POST'])
def check_credentials():
    """
    credentials Route
    ---
    consumes:
      - application/json
    parameters:
      - in: header
        name: Authorization
        type: string
        required: true
        description: The user's credentials in the format "username=password"
    responses:
      200:
        description: A list of user credentials
        examples:
          username: John
          v1: 1
          v2: 0
    """
    auth = request.headers.get('Authorization')
    if not auth:
        return 'Unauthorized', 401

    username, password = auth.split('=')
    if username not in credentials or credentials[username]['password'] != password:
        return 'Unauthorized', 401

    response_data = {'username': username, 'v1': credentials[username]['v1'], 'v2': credentials[username]['v2']}
    response = make_response(jsonify(response_data), 200)
    response.headers['Content-Type'] = 'application/json'
    return response


# Route pour l'analyse de sentiment avec le modèle v1
@app.route('/v1/sentiment', methods=['POST'])
def sentiment_v1():
    """
    Sentiment Analysis Route (Model v1)
    ---
    parameters:
      - in: header
        name: Authorization
        type: string
        required: true
        description: The user's credentials in the format "username=password"
      - in: formData  # Modification ici pour spécifier le type de données du formulaire
        name: sentence
        type: string
        required: true
        description: The sentence to analyze
    responses:
      200:
        description: The sentiment score
        examples:
          score: 0.5
    """
    auth = request.headers.get('Authorization')
    if not auth:
      return 'Unauthorized', 401

    username, password = auth.split('=')
    if username not in credentials or credentials[username]['password'] != password:
      return 'Unauthorized (wrong username and/or password)', 401
    
    if credentials[username]['v1']==0:
      return 'User unauthorized for Sentiment Analysis v1', 401
    
    sentence = request.form.get('sentence')
    if not sentence:
      return 'Bad Request', 400

    # Implémentation factice de l'analyse de sentiment pour le modèle v1 (nombre aléatoire entre -1 et 1)
    sentiment_score = random.uniform(-1, 1)
    return str(sentiment_score)

# Route pour l'analyse de sentiment avec le modèle v2
@app.route('/v2/sentiment', methods=['POST'])
def sentiment_v2():
    """
    Sentiment Analysis Route (Model v2)
    ---
    parameters:
      - in: header
        name: Authorization
        type: string
        required: true
        description: The user's credentials in the format "username=password"
      - in: formData  # Modification ici pour spécifier le type de données du formulaire
        name: sentence
        type: string
        required: true
        description: The sentence to analyze
    responses:
      200:
        description: The sentiment score
        examples:
          score: 0.5
    """
    auth = request.headers.get('Authorization')
    if not auth:
      return 'Unauthorized', 401

    username, password = auth.split('=')
    if username not in credentials or credentials[username]['password'] != password:
      return 'Unauthorized (wrong username and/or password)', 401
    
    if credentials[username]['v2']==0:
      return 'User unauthorized for Sentiment Analysis v2', 401
    
    sentence = request.form.get('sentence')
    if not sentence:
      return 'Bad Request', 400

    # Implémentation de l'analyse de sentiment avec le modèle v2 (VaderSentiment)
    analyzer = SentimentIntensityAnalyzer()
    sentiment_score = analyzer.polarity_scores(sentence)['compound']
    return str(sentiment_score)

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