StorageStack Core

With storagestack you can use middleware to control the flow of storing data into a storage system.

When we see the rise of decentralized applications it is important to build upon a framework to control the content in these distributed systems. This will help to implement common functionality within the space.

This provides you with the application object of storagestack

import { ss } from '@storagestack/core';

Provider

A provider is an abstract definition of a storage mechanism. Every provider can set, get and delete content.

You can register a provider on the application object of storagestack.

ss.registerProvider(new MemoryProvider());

Or when you want to use a pattern ...

ss.registerProvider(new MemoryProvider(), '*-index.json');

Take a look in the core library to the provider interface.

Middleware

You will have also an ability to define middleware to transform your storage content to the content you want for your application.

You register a middleware by providing a pattern when the middleware needs to be handled and the middleware implementation.

ss.use('*', new UpperMiddleware());

When you want to create your own middleware you can just implement the 'MiddlewareStack' interface.

An example of a middleware implementation that has a counter and transforms the content to uppercase when it is been set.

class UpperMiddleware implements MiddlewareStack {
    count = 1;
    
    set(storageInfo: StorageInfo, next: () => void) {
        storageInfo.content = storageInfo.content.toUpperCase();
        next();
    }
    
    get(storageInfo: StorageInfo, next: () => void) {
        storageInfo.content = `${this.count} ${storageInfo.origin}`;
        this.count++;
        next();
    }
}