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refactor: Move file related metadata to FileResourceStore

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This commit is contained in:
Joachim Van Herwegen
2020-09-23 17:05:59 +02:00
parent 22962192ff
commit fa935cc4c7
3 changed files with 55 additions and 30 deletions
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34
src/util/MetadataController.ts
View File

@@ -1,35 +1,31 @@
import type { Stats } from 'fs';
import type { Readable } from 'stream';
import arrayifyStream from 'arrayify-stream';
import { DataFactory, StreamParser, StreamWriter } from 'n3';
import type { Quad } from 'rdf-js';
import type { NamedNode, Quad } from 'rdf-js';
import streamifyArray from 'streamify-array';
import { RepresentationMetadata } from '../ldp/representation/RepresentationMetadata';
import { TEXT_TURTLE } from './ContentTypes';
import { DCTERMS, LDP, POSIX, RDF, XSD } from './UriConstants';
import { toNamedNode, toTypedLiteral } from './UriUtil';
import { pipeStreamsAndErrors } from './Util';
import { LDP, RDF } from './UriConstants';
import { toNamedNode } from './UriUtil';
import { pipeStreamsAndErrors, pushQuad } from './Util';
export class MetadataController {
/**
* Helper function to generate quads for a Container or Resource.
* @param uri - The URI for which the quads should be generated.
* @param stats - The Stats of the subject.
* Helper function to generate type quads for a Container or Resource.
* @param subject - Subject for the new quads.
* @param isContainer - If the identifier corresponds to a container.
*
* @returns The generated quads.
*/
public generateResourceQuads(uri: string, stats: Stats): Quad[] {
const metadata = new RepresentationMetadata(uri);
if (stats.isDirectory()) {
metadata.add(RDF.type, toNamedNode(LDP.Container));
metadata.add(RDF.type, toNamedNode(LDP.BasicContainer));
public generateResourceQuads(subject: NamedNode, isContainer: boolean): Quad[] {
const quads: Quad[] = [];
if (isContainer) {
pushQuad(quads, subject, toNamedNode(RDF.type), toNamedNode(LDP.Container));
pushQuad(quads, subject, toNamedNode(RDF.type), toNamedNode(LDP.BasicContainer));
}
metadata.add(RDF.type, toNamedNode(LDP.Resource));
metadata.add(POSIX.size, toTypedLiteral(stats.size, XSD.integer));
metadata.add(DCTERMS.modified, toTypedLiteral(stats.mtime.toISOString(), XSD.dateTime));
metadata.add(POSIX.mtime, toTypedLiteral(Math.floor(stats.mtime.getTime() / 1000), XSD.integer));
pushQuad(quads, subject, toNamedNode(RDF.type), toNamedNode(LDP.Resource));
return metadata.quads();
return quads;
}
/**
@@ -39,7 +35,7 @@ export class MetadataController {
*
* @returns The generated quads.
*/
public generateContainerContainsResourceQuads(containerURI: string, childURIs: string[]): Quad[] {
public generateContainerContainsResourceQuads(containerURI: NamedNode, childURIs: string[]): Quad[] {
return new RepresentationMetadata(containerURI, { [LDP.contains]: childURIs.map(DataFactory.namedNode) }).quads();
}

9
src/util/Util.ts
View File

@@ -1,5 +1,7 @@
import type { Readable, Writable } from 'stream';
import arrayifyStream from 'arrayify-stream';
import { DataFactory } from 'n3';
import type { Literal, NamedNode, Quad } from 'rdf-js';
import { UnsupportedHttpError } from './errors/UnsupportedHttpError';
/**
@@ -84,3 +86,10 @@ export const decodeUriPathComponents = (path: string): string => path.split('/')
* Encodes all (non-slash) special characters in a URI path.
*/
export const encodeUriPathComponents = (path: string): string => path.split('/').map(encodeURIComponent).join('/');
/**
* Generates a quad with the given subject/predicate/object and pushes it to the given array.
*/
export const pushQuad =
(quads: Quad[], subject: NamedNode, predicate: NamedNode, object: NamedNode | Literal): number =>
quads.push(DataFactory.quad(subject, predicate, object));