DATA-ADAPTER 💥 💥🔥

Focusing on the pain points of a developer while moving files across different storages lik file system,AWS,MongoDB or any other cloud environment, This module serves as a easy to switch adapter interface for File system and AWS currently.This library can be extended easily to support any cloud storages or databases.Contributions Welcome!

How to install this module:

From your node project folder run the below npm command.You must have the git system to install this as the module is not yet published in npm repository

npm i git+ssh://git@github.com:jenilChristo/data-adapter.git#master

How to initialise the module:

const dataAdapter = require('data-adapter')(config);

config is a configurable object for the adapter that chooses the data store.Config looks like

  data_store:"fs", //can be fs,s3 . 
  s3:{ . 
      bucket:"bucket_name",  
      apiVersin:"apiVersion to connect",  
      cPath:"path to s3 config json", 
  } . 
} . ```

### Supported API's
All the API's are promise based to support asynchronisity .Thus errors has to be handled appropriately in the promise chains

* saveFile()
* getFile()
* deleteFile()
* getMetaData()

### saveFile(options)
Saves a file to either s3 bucket or the filesystem based on data_store value.

options is an object which must have `options.path` set to a valid file path to save. 

It resolves to `{status:"OK",savedIn:"path"}`, if file is written successfully

### getFile(options)
Reads a file  either from s3 bucket or the filesystem based on data_store value.

options is an object which must have `options.path` set to a valid file path to get file data
and `options.output` is the output file name to write.

This method automatically creates a folder `./out` if not exists and stores all get Files here.
It resolves with the destination of the fetched output file

###  deleteFile(options)

`options.path` represents the key/name of the file to be deleted.This is a required parameter for this API

Resolves with `{ status: "OK", message: "File deleted successfully" }`, if file is deleted succesfully

###  getMetaData(options)

`options.path` represents the key/name of the file to be deleted.This is a required parameter for this API

Resolves with Meta info of the file, from which last_updated_date etc can be accessed.

### Tests
Tests are written in mocha, chai and sinon.To run all test cases run the following command

`npm run test`

### Useful Reference
* https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/setting-credentials-node.html
* https://nodejs.org/api/stream.html#stream_readable_streams
* https://nodejs.org/api/fs.html
* https://sinonjs.org

### Issues
While this library is still not past the beta development stage and needs to be improved before it is used in production, any issues or comments are welcome and we are ready to address them and patch a fix if required

* To raise an issue goto https://github.com/jenilChristo/data-adapter/issues

### PR
While this library is still not past the beta stage , any active suggestions or contributions are most welcome

* Open a PR https://github.com/jenilChristo/data-adapter/issues