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feat: use origin based </x/y/> relativisation rather than <../../../x/y/> when result is a shorter relative IRI. #529

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feat: use origin based </x/y/> relativisation rather than <../../../x/y/> when result is a shorter relative IRI. #529

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bd6d3cb
feat: relativise to origin where appropriate
jeswr May 26, 2025
eb1030a
chore: remove unused tests
jeswr May 26, 2025
c4bce9c
chore: fix off-by-one comparison
jeswr May 26, 2025
1cc2acc
chore: remove duplicate test
jeswr May 26, 2025
c64695c
chore: make absoluteIris opt in
jeswr May 29, 2025
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14 changes: 12 additions & 2 deletions src/BaseIRI.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@ import { escapeRegex } from './Util';
const BASE_UNSUPPORTED = /^:?[^:?#]*(?:[?#]|$)|^file:|^[^:]*:\/*[^?#]+?\/(?:\.\.?(?:\/|$)|\/)/i;
const SUFFIX_SUPPORTED = /^(?:(?:[^/?#]{3,}|\.?[^/?#.]\.?)(?:\/[^/?#]{3,}|\.?[^/?#.]\.?)*\/?)?(?:[?#]|$)/;
const CURRENT = './';
const ORIGIN = '/';
const PARENT = '../';
const QUERY = '?';
const FRAGMENT = '#';
Expand Down Expand Up @@ -57,8 +58,17 @@ export default class BaseIRI {
}

// Precalculate parent path substitutions
for (let i = 0; i < segments.length; i++)
this._pathReplacements[segments[i]] = PARENT.repeat(segments.length - i - 1);
for (let i = 0; i < segments.length; i++) {
const parentLength = 3 * (segments.length - i - 1);
const baseLength = segments[i] - segments[0];

if (parentLength < baseLength) {
this._pathReplacements[segments[i]] = PARENT.repeat(segments.length - i - 1);
}
else {
this._pathReplacements[segments[i]] = ORIGIN + this.base.slice(segments[0], segments[i]);
}
}
this._pathReplacements[segments[segments.length - 1]] = CURRENT;

// Add the remainder of the base IRI (without fragment) to the regex
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9 changes: 9 additions & 0 deletions test/BaseIRI-test.js
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Expand Up @@ -137,6 +137,15 @@ describe('BaseIRI', () => {

relativizes('an IRI containing ../ in its fragment', 'http://example.org/foo/',
'http://example.org/foo/baz#bar/../baz', 'baz#bar/../baz');

relativizes('an IRI directly relative to the base', 'http://example.org/foo/',
'http://example.org/foo/baz', 'baz');

relativizes('an IRI where it is better to use a / path', 'http://example.org/foo/baz/nook/task/tar/',
'http://example.org/foo/bar', '/foo/bar');

relativizes('an IRI where it is better to use a / path [/x/y]', 'http://example.org/x/q/r/n/m/',
'http://example.org/x/y', '/x/y');
});
});

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