import requests
def getArticleTitles(author):
    titles = []
    page = 1
    base_url = f"https://jsonmock.hackerrank.com/api/articles?author={author}&page="
    while True:
        response = requests.get(base_url + str(page))
        data = response.json()
        for article in data['data']:
            if article['title']:
                titles.append(article['title'])
            elif article['story_title']:
                titles.append(article['story_title'])
        if page >= data['total_pages']:
            break
        page += 1
    return titles