# spotify-statistics

instagram-statistics is a flow lets us scrape artists data and metrics using ```instaloader``` library.
The flow provides us with the next metrics:
* if the artist has *VERIFIED* label
* current **followers** count,  and it's growth compared to the previous week 
* Spotify **popularity**
* current **editorial playlist adds** count,  and it's growth compared to the previous week
* **editorial playlist** IDs,  and it's growth compared to the previous week
* current **notable playlist adds** count,  and it's growth compared to the previous week. Notable playlist means 3K+ followers
* **notable playlist** IDs,  and it's growth compared to the previous week
* the latest artist's release on Spotify

For scrapping the data ```spotipy``` uses Spotify Developers application and Spotify API. For creating the instance ```spotipy``` uses SPOTIFY_CLIENT_ID and SPOTIFY_CLIENT_SECRET variables written down at ```.env``` file.
```spotipy``` is a side library, so you need to install it separately.
3d party libraries are listed at ```Pipfile``` which lock is using at ```Dockerfile``` while installing it.

###Technical features

Requesting **Discovered On** playlists is not able with spotipy. For getting data on it ```get_playlists_ids()``` method is implemented. But for getting not empy file it requires **request_headers** from ```config.py```.
Due to its implementation with request, some playlists cannot be reachable, so to avoid the exception throwing ERROR logging only is implemented.

After all the data is scrapped, it is put at a dictionary with artist's username as a key.
And then, using the name, it is loaded to SnowFlake table.

As the initial table we could get the links from is *ARTISTS_TO_TRACK*, having all the links to Spotify, YouTube and SoundCloud also.

#Running the flow

To run the flow the repository contains ```Dockerfile```.
There we have OS installation (Centos8), location set up. 
Then we have *ARG* and *ENV* declarations. To provide them while building the ```Dockerfile``` **--build-arg {var_name}={var_value}** notation for is required.
Required environment variables* are:
* SNOWFLAKE_ROLE
* SNOWFLAKE_WAREHOUSE
* SNOWFLAKE_PASSWORD
* SNOWFLAKE_USER
* SNOWFLAKE_ACCOUNT
* SNOWFLAKE_DATABASE
* SNOWFLAKE_SCHEMA
* SPOTIFY_CLIENT_ID
* SPOTIFY_CLIENT_SECRET

To build the Docker container the following command from the repository directory:
```docker build -f Dockerfile --build-arg SNOWFLAKE_ROLE=${SNOWFLAKE_ROLE} --build-arg SNOWFLAKE_WAREHOUSE=${SNOWFLAKE_WAREHOUSE} --build-arg SNOWFLAKE_PASSWORD=${SNOWFLAKE_PASSWORD} --build-arg SNOWFLAKE_USER=${SNOWFLAKE_USER} --build-arg SNOWFLAKE_ACCOUNT=${SNOWFLAKE_ACCOUNT} --build-arg SNOWFLAKE_DATABASE=${SNOWFLAKE_DATABASE} --build-arg SNOWFLAKE_SCHEMA=${SNOWFLAKE_SCHEMA} --build-arg SPOTIFY_CLIENT_ID=${SPOTIFY_CLIENT_ID} --build-arg SPOTIFY_CLIENT_SECRET=${SPOTIFY_CLIENT_SECRET} -t myimage .```
*${VAR_NAME}* need to be replaced with *required environment variables.
After this the container starts to build, and the last step written down is ```RUN python3 /spotify-statistics/spotify_with_spotipy.py``` that starts the flow.