@static-pages/io
v0.1.1
Published
Helpers for reading and writing data.
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Readme
Static Pages / IO
This package provides utilities for reading and writing documents from an abstract filesystem.
Use read() to create an async iterable collection of documents, and write() to handle rendering and storing.
This project is structured as a toolkit split to many packages, published under the @static-pages namespace on NPM. In most cases you should not use this io package directly, but the @static-pages/starter is a good point to begin with.
Usage
import staticPages from '@static-pages/core';
import { read, write } from '@static-pages/io/node';
staticPages({
from: read({
cwd: 'pages',
pattern: '**/*.md',
}),
controller(data) {
data.now = new Date().toJSON();
return data;
},
to: write({
render({ title, content, now }) {
return `<html><body><h1>${title}</h1><p>${content}</p><p>generated: ${now}</p></body></html>`;
},
})
})
.catch(error => {
console.error('Error:', error);
console.error(error.stack);
});Documentation
For detailed information, visit the project page.
read(options: ReadOptions<T>): AsyncIterable<T>
interface ReadOptions<T> {
// Filesystem implementation that handles reads and writes.
fs: Filesystem;
// Current working directory.
cwd?: string;
// File patterns to include.
pattern?: string | string[];
// File patterns to exclude.
ignore?: string | string[];
// Callback to parse raw contents into an object.
// default: see About the default `parse` function
parse?(content: Uint8Array | string, filename: string): T | Promise<T>;
// Handler function called on error.
// default: (err) => { throw err; }
onError?(error: unknown): void | Promise<void>;
}write(options: WriteOptions<T>): void
interface WriteOptions<T> {
// Filesystem implementation that handles reads and writes.
fs: Filesystem;
// Current working directory.
cwd?: string;
// Callback that retrieves the filename (URL) of a page.
// default: (d) => d.url + '.html'
name?(data: T): string | Promise<string>;
// Callback that renders the document into a page.
// default: (d) => d.content
render?(data: T): Uint8Array | string | Promise<Uint8Array | string>;
// Handler function called on error.
// default: (err) => { throw err; }
onError?(error: unknown): void | Promise<void>;
}Filesystem interface
You can provide a Filesystem implementation for both read() and write() helpers. This interface is a minimal subset of the NodeJS FS API.
interface Filesystem {
stat(
path: string | URL,
callback: (err: Error | null, stats: { isFile(): boolean; isDirectory(): boolean; }) => void
): void;
readdir(
path: string | URL,
options: {
encoding: 'utf8';
withFileTypes: false;
recursive: boolean;
},
callback: (err: Error | null, files: string[]) => void,
): void;
mkdir(
path: string | URL,
options: {
recursive: true;
},
callback: (err: Error | null, path?: string) => void
): void;
readFile(
path: string | URL,
callback: (err: Error | null, data: Uint8Array) => void
): void;
writeFile(
path: string | URL,
data: string | Uint8Array,
callback: (err: Error | null) => void
): void;
}About the default parse function
When using the default parser, a file type will be guessed by the file extension.
These could be json, yaml, yml, md or markdown.
jsonwill be parsed withJSON.parseyamlandymlwill be parsed with theyamlpackagemdandmarkdownwill be parsed with thegray-matterpackage
When the document is missing an url property this function will assign the filename without extension to it.
Importing @static-pages/io/node
The @static-pages/io/node export provides the same functions as the @static-pages/io with the added benefit of setting the default value of the fs property to the node:fs package.
This way it is easier to use these utility functions from a node script and also easier to bundle them for browsers.
Missing a feature?
Create an issue describing your needs! If it fits the scope of the project I will implement it.