@asset-pipe/sink-mem

A asset-pipe sink for writing and reading asset feeds and js/css bundles to and from a simple in memory store.

The intention of the asset-pipe sink modules is to use be able to write and read files to different backends by just swapping modules. By each sink implementing the same public API it is possible to ex use this module in one environment and another sink module in another environment.

These sinks are normally used by the asset-pipe-build-server.

Installation

$ npm install @asset-pipe/sink-mem

Example

Read an asset feed from the store and serve it on http:

const express = require('express');
const Sink = require('@asset-pipe/sink-mem');

const app = express();
const sink = new Sink();

app.get('/', (req, res, next) => {
    const file = sink.reader('feed.json');
    file.on('file not found', () => {
        res.status(404).send('File not found');
    });
    file.on('file found', () => {
        res.status(200);
        file.pipe(res);
    });
});

app.listen(8000);

API

This module have the following API:

constructor()

Constructor takes no arguments.

get(fileName: string): Promise

Async method for reading a file from storage

set(fileName: string, fileContent: string): Promise

Async method for writing file to storage

has(fileName: string): Promise

Async method for checking if file exist in storage

dir(directoryName: string): Promise

Async method for getting all files in a given directory

writer(type)

Method for writing a file to memory. Returns a write stream.

Supported arguments are:

• type - String - File type of the file to write. Used as extension of the persisted file. - Required

Events:

• file saved - When a file have been sucessfully persisted. Emits with: id and file.
• file not saved - When a file could not be persisted. Emits with: error.
• error - When an error occured during persistence. Emits with: error.

reader(file)

Method for reading a file from memory. Returns a read stream.

Supported arguments are:

• file - String - File name of the file to read. - Required

Events:

• file found - When the file we want to read is found. Emits with: file.
• file not saved - When the file we want to read is not found. Emits with: file.

License

The MIT License (MIT)

Copyright (c) 2017 - Trygve Lie - post@trygve-lie.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Contributing

The contribution process is as follows:

• Fork this repository.
• Make your changes as desired.
• Run the tests using npm test. This will also check to ensure that 100% code coverage is maintained. If not you may need to add additional tests.
• Stage your changes.
• Run git commit or, if you are not familiar with semantic commit messages, please run npm run cm and follow the prompts instead which will help you write a correct semantic commit message.
• Push your changes and submit a PR.