delete-images.py

import requests
import json
import calendar
from datetime import datetime, timedelta

# https://api.slack.com/docs/oauth-test-tokens
_token = 'token'
_domain = 'hma'

if __name__ == '__main__':
    while True:
        files_list_url = 'https://slack.com/api/files.list'
        date = str(calendar.timegm((datetime.now() + timedelta(-30)).utctimetuple()))
        data = {'token': _token, 'ts_to': date}
        response = requests.post(files_list_url, data = data)
        files = response.json()['files']
        images = [f for f in files if 'image/' in f['mimetype']]
        
        if len(files) == 0 or len(images) == 0:
            break
            
        for f in files:
            if 'image/' not in f['mimetype']:
                continue
            
            print('Deleting file ' + f['name'] + '...')
            timestamp = str(calendar.timegm(datetime.now().utctimetuple()))
            delete_url = 'https://' + _domain + '.slack.com/api/files.delete?t=' + timestamp
            requests.post(delete_url, data={
                'token': _token, 
                'file': f['id'], 
                'set_active': 'true', 
                '_attempts': '1'}
            )
    print('All files deleted.')