Create mermaid dependency chart of github issues

gh_issue_dep_chart.py

"""
initial prompt:
assuming github issues will have their first line in the body as "#dep: #1, #2, #4", 
write a python script to get all open issues in a repo using the github rest API that 
will parse this information and create a flowchart using mermaid.js to show the issue 
dependenices. Also if there are no dependencies for an issue, add it to the flowchart 
anyway. Remember to do a null check on the body before checking if a string exists 
inside it. Use the requests library and not the github library
"""

import requests
import json
import re

# Set the repo and owner
owner = '..'
repo = '...'

# Set the authorization token
headers = {'Authorization': 'Bearer ...'}

# Get all open issues
url = f'https://api.github.com/repos/{owner}/{repo}/issues?state=open'
response = requests.get(url, headers=headers)
issues = json.loads(response.text)

def get_issues(owner, repo, access_token):
    url = f'https://api.github.com/repos/{owner}/{repo}/issues?state=open'
    response = requests.get(url, headers=headers)
    issues = response.json()
    return issues

def get_dependencies(issue):
    """
    Look for a line with the format
        #dep: #9, #10, #11
    """
    body = issue.get('body')
    if body:
        match = re.search(r'^#dep:\s+((#\d+,?\s*)+)', body)
        if match:
            dependencies = match.group(1).replace('#', '').split(',')
            dependencies = [int(dep.strip()) for dep in dependencies]
            return dependencies
    return []

def generate_mermaid(issues):
    mermaid = 'graph LR\n'
    for issue in issues:
        issue_number = issue['number']
        issue_title = re.sub(r"[()]", "", issue['title'])
        dependencies = get_dependencies(issue)
        if dependencies:
            for dep in dependencies:
                mermaid += f'{dep} --> {issue_number}[{issue_number}: {issue_title}]\n'
        else:
            mermaid += f'{issue_number}[{issue_number}: {issue_title}]\n'
    return mermaid

issues = get_issues(owner, repo, headers)
mermaid = generate_mermaid(issues)
print(mermaid)