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refactor: More precise error messages

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This commit is contained in:
Ruben Verborgh
2020-09-04 23:15:35 +02:00
parent 389fb33334
commit 063437e5c1
2 changed files with 18 additions and 20 deletions
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30
src/ldp/permissions/SparqlPatchPermissionsExtractor.ts
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@@ -12,31 +12,29 @@ import { PermissionsExtractor } from './PermissionsExtractor';
* while DELETEs require write permissions as well.
*/
export class SparqlPatchPermissionsExtractor extends PermissionsExtractor {
public async canHandle(input: Operation): Promise<void> {
if (input.method !== 'PATCH') {
throw new UnsupportedHttpError('Only PATCH operations are supported.');
public async canHandle({ method, body }: Operation): Promise<void> {
if (method !== 'PATCH') {
throw new UnsupportedHttpError(`Cannot determine permissions of ${method}, only PATCH.`);
}
if (!input.body) {
throw new UnsupportedHttpError('PATCH body is required to determine permissions.');
if (!body) {
throw new UnsupportedHttpError('Cannot determine permissions of PATCH operations without a body.');
}
if (!this.isSparql(input.body)) {
throw new UnsupportedHttpError('Only SPARQL update PATCHes are supported.');
if (!this.isSparql(body)) {
throw new UnsupportedHttpError('Cannot determine permissions of non-SPARQL patches.');
}
if (!this.isDeleteInsert(input.body.algebra)) {
throw new UnsupportedHttpError('Only DELETE/INSERT SPARQL update operations are supported.');
if (!this.isDeleteInsert(body.algebra)) {
throw new UnsupportedHttpError('Cannot determine permissions of a PATCH without DELETE/INSERT.');
}
}
public async handle(input: Operation): Promise<PermissionSet> {
public async handle({ body }: Operation): Promise<PermissionSet> {
// Verified in `canHandle` call
const op = (input.body as SparqlUpdatePatch).algebra as Algebra.DeleteInsert;
const read = false;
const write = this.needsWrite(op);
const update = (body as SparqlUpdatePatch).algebra as Algebra.DeleteInsert;
// Since `append` is a specific type of write, it is true if `write` is true.
const append = write || this.needsAppend(op);
const read = false;
const write = this.needsWrite(update);
const append = write || this.needsAppend(update);
return { read, write, append };
}