Create a custom configured resource for Strava API

[jairus-m]

Summary

Currently, the Strava API configuration is hard-coded and baked into the assets/activities.py as a function. This works if you are only developing a single pipeline for testing, but does not scale since the configured API is not modular and/or reusable.

This PR aims to create a reusable resource for the Strava API that can be used as a Dagster resource just like the dbt or duckdb resources.

Details

Utilized the ConfigurableResource class to be inherited by a new StravaAPIResource class in order to import and reuse the API across my project and to follow best practices. This object is in the resources/ directory and is used just like any other Dagster resource and inherits the same benefits.

from dagster import ConfigurableResource, asset, Definitions
import requests
from typing import Dict, Any

class StravaAPIResource(ConfigurableResource):
    client_id: str
    client_secret: str
    refresh_token: str
    _access_token: str = None

    def get_access_token(self) -> str:
        if not self._access_token:
            self._access_token = self._refresh_access_token()
        return self._access_token

    def _refresh_access_token(self) -> str:
        auth_url = "https://www.strava.com/oauth/token"
        payload = {
            'client_id': self.client_id,
            'client_secret': self.client_secret,
            'refresh_token': self.refresh_token,
            'grant_type': 'refresh_token'
        }
        response = requests.post(auth_url, data=payload, timeout=100)
        response.raise_for_status() 
        return response.json()['access_token']