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dbconnection.py
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dbconnection.py
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from flask import Flask, request, redirect, url_for, session, send_file, render_template
from flask_bootstrap import Bootstrap
import logging
import requests
import json
import psycopg2
import csv
from tenacity import retry, stop_after_attempt, wait_fixed
from urllib.parse import urlencode
from sqlalchemy import create_engine, Column, Integer, String, ForeignKey
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
# Create database connection
engine = create_engine('postgresql://postgres:password@mypostgres:5432/mydatabase')
Session = sessionmaker(bind=engine)
# Create declarative base
Base = declarative_base()
app = Flask(__name__)
bootstrap = Bootstrap(app)
app.secret_key = "my_secret_key"
# Github OAuth settings
CLIENT_ID = 'cb02994933b0febfa39c'
CLIENT_SECRET = '4e7410487747eed49943d1ba5881009f9a7c0cea'
AUTHORIZE_URL = "https://github.com/login/oauth/authorize"
ACCESS_TOKEN_URL = "https://github.com/login/oauth/access_token"
# Configure logging
logging.basicConfig(filename='app.log', level=logging.INFO)
# Home page
@app.route('/')
def home():
logging.info("Home page accessed.")
return render_template('home.html', oauth_url=url_for('oauth_login'))
# OAuth login
@app.route('/oauth/login')
def oauth_login():
logging.info("OAuth login initiated.\n")
# Redirect user to Github OAuth login page
params = {
"client_id": CLIENT_ID,
"redirect_uri": url_for("oauth_callback", _external=True),
"scope": "repo"
}
return redirect(AUTHORIZE_URL + "?" + urlencode(params))
# OAuth callback
@app.route('/oauth/callback')
def oauth_callback():
logging.info("OAuth callback initiated.")
# Exchange authorization code for access token
code = request.args.get("code")
params = {
"client_id": CLIENT_ID,
"client_secret": CLIENT_SECRET,
"code": code
}
response = requests.post(ACCESS_TOKEN_URL, params=params, headers={
"Accept": "application/json"})
access_token = json.loads(response.text)["access_token"]
# Store access token in session
session["access_token"] = access_token
# Redirect user to fetch data
return redirect(url_for("fetch_data"))
@app.route('/fetch_data')
def fetch_data():
logging.info("Data fetching initiated.\n")
# Get access token from session
access_token = session["access_token"]
# Fetch repository data from Github API
try:
repos = fetch_repos(access_token)
except requests.exceptions.RequestException as e:
logging.error(f"Error fetching data: {e}")
return "Error fetching data. Please try again later."
# Normalize data and deduplicate
normalized_data = normalize_data(repos)
# Store data in Postgres database
try:
store_data(normalized_data)
except(Exception, psycopg2.Error) as error:
logging.error("Error while connecting to database.", error)
return "Error while storing data in database."
# Create CSV file
try:
session_ = Session()
query = session_.query(Owner.id, Owner.name, Owner.email, Repo.id, Repo.name, Repo.status, Repo.stars_count).join(Repo).all()
create_csv_file(query)
return render_template('result.html', oauth_login=url_for('oauth_login'), download_csv=url_for('download_csv'))
except Exception as e:
logging.error("An error occurred while writing data to CSV: " + str(e))
return "An error occurred while writing data to CSV: " + str(e)
# Function to fetch repository data from Github API
@retry(stop=stop_after_attempt(10), wait=wait_fixed(1))
def fetch_repos(access_token):
headers = {
"Authorization": f"Bearer {access_token}",
"Accept": "application/vnd.github.v3+json"
}
user_repos_url = "https://api.github.com/user/repos"
response = requests.get(user_repos_url, headers=headers)
user_repos = response.json()
org_repos_url = "https://api.github.com/orgs/{org}/repos"
org_name = "ACM-VIT"
response = requests.get(org_repos_url.format(org=org_name), headers=headers)
org_repos = response.json()
# Return both user and organization repositories
return user_repos + org_repos
# Function to normalize data and deduplicate
def normalize_data(repos):
normalized_data = []
seen = set()
for repo in repos:
owner = {
'id': repo['owner']['id'],
'name': repo['owner']['login'],
'email': repo['owner'].get('email', '')
}
normalized_repo = {
'id': repo['id'],
'name': repo['name'],
'status': 'Public' if repo['private'] == False else 'Private',
'stars_count': repo['stargazers_count'],
'owner_id': repo['owner']['id']
}
key = (normalized_repo['id'], normalized_repo['owner_id'])
if key not in seen:
seen.add(key)
normalized_data.append({'owner': owner, 'repo': normalized_repo})
return normalized_data
# Define owners and repos tables
class Owner(Base):
__tablename__ = 'owners'
id = Column(Integer, primary_key=True)
name = Column(String)
email = Column(String)
class Repo(Base):
__tablename__ = 'repos'
id = Column(Integer, primary_key=True)
name = Column(String)
status = Column(String)
stars_count = Column(Integer)
owner_id = Column(Integer, ForeignKey('owners.id'))
# Define function to store data
def store_data(normalized_data):
try:
# Create session
session = Session()
# Create tables if they don't exist
Base.metadata.create_all(engine)
# Insert data into the tables
for data in normalized_data:
owner = data['owner']
repo = data['repo']
# Upsert owners table
owner_obj = Owner(id=owner['id'], name=owner['name'], email=owner['email'])
session.merge(owner_obj)
# Upsert repos table
repo_obj = Repo(id=repo['id'], name=repo['name'], status=repo['status'], stars_count=repo['stars_count'], owner_id=owner['id'])
session.merge(repo_obj)
# Commit the changes to the database
session.commit()
logging.info("Data stored successfully.")
except Exception as error:
logging.error("Error while storing data.", error)
finally:
if session:
session.close()
logging.info("Session closed.")
# Function to create CSV file
def create_csv_file(query_fetched_data):
try:
with open('repos.csv', mode='w', newline='') as file:
writer = csv.writer(file)
writer.writerow(['Owner ID', 'Owner Name', 'Owner Email',
'Repo ID', 'Repo Name', 'Status', 'Stars Count'])
for data in query_fetched_data:
writer.writerow(list(data))
print("Data fetched and stored successfully.")
except Exception as e:
print(f"An error occurred while writing data to CSV: {e}")
# Download CSV file
@app.route('/download_csv', methods=['GET', 'POST'])
def download_csv():
return send_file('repos.csv', mimetype='text/csv', as_attachment=True, attachment_filename='repos.csv')
if __name__ == '__main__':
app.run(debug=True)