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#28: Compacting IRIs in storage (WIP)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| import { Quad } from 'rdf-js'; | ||
| import { fromRDF, toRDF, Options, processContext } from 'jsonld'; | ||
| import { cloneQuad } from './quads'; | ||
| import { Context, Iri } from 'jsonld/jsonld-spec'; | ||
| import { getInitialContext, expandIri, ActiveContext } from 'jsonld/lib/context'; | ||
| import { compactIri as _compactIri } from 'jsonld/lib/compact'; | ||
| export { Options } from 'jsonld'; | ||
| export { ActiveContext } from 'jsonld/lib/context'; | ||
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| export function rdfToJson(quads: Quad[]): Promise<any> { | ||
| // Using native types to avoid unexpected value objects | ||
| return fromRDF(quads, { useNativeTypes: true }); | ||
| } | ||
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| export async function jsonToRdf(json: any): Promise<Quad[]> { | ||
| const quads = await toRDF(json) as Quad[]; | ||
| // jsonld produces quad members without equals | ||
| return quads.map(cloneQuad); | ||
| } | ||
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| export function expandTerm(value: string, ctx: ActiveContext, options?: Options.Expand): Iri { | ||
| return expandIri(ctx, value, { base: true }, options ?? {}); | ||
| } | ||
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| export function compactIri(iri: Iri, ctx: ActiveContext, options?: Options.CompactIri): string { | ||
| return _compactIri({ activeCtx: ctx, iri, ...options }); | ||
| } | ||
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| export async function activeCtx(ctx: Context, options?: Options.DocLoader): Promise<ActiveContext> { | ||
| return await processContext(getInitialContext({}), ctx, options ?? {}); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| declare module 'jsonld/lib/compact' { | ||
| import { Iri, Url } from 'jsonld/jsonld-spec'; | ||
| import { ActiveContext } from 'jsonld/lib/context'; | ||
| import { Options } from 'jsonld'; | ||
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| function compactIri(opts: { | ||
| activeCtx: ActiveContext, | ||
| iri: Iri | ||
| } & Options.CompactIri): string; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| declare module 'jsonld/lib/context' { | ||
| import { Context, Iri } from 'jsonld/jsonld-spec'; | ||
| import { Options } from 'jsonld'; | ||
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| // Using the 'protected' field to prevent type mistakes | ||
| type ActiveContext = Context & { protected: {} }; | ||
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| function getInitialContext(options: { processingMode?: boolean }): ActiveContext; | ||
| function expandIri( | ||
| activeCtx: Context, | ||
| value: string, | ||
| relativeTo: { vocab?: boolean, base?: boolean }, | ||
| options: Options.Common): Iri; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| import { Context, Url } from 'jsonld/jsonld-spec'; | ||
| import { ActiveContext } from 'jsonld/lib/context'; | ||
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| declare module 'jsonld' { | ||
| namespace Options { | ||
| export interface CompactIri { | ||
| value?: any, // TODO | ||
| relativeTo?: { vocab: boolean; }, | ||
| reverse?: boolean, | ||
| base?: Url | ||
| } | ||
| } | ||
|
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| function processContext( | ||
| activeCtx: ActiveContext, | ||
| localCtx: Context, | ||
| options: Options.DocLoader): | ||
| Promise<ActiveContext>; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| import { expandTerm, compactIri, ActiveContext, activeCtx } from '../src/engine/jsonld'; | ||
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| describe('JSON-LD', () => { | ||
| const context = { | ||
| '@base': 'http://example.org/', | ||
| '@vocab': 'http://example.org/#', | ||
| 'mld': 'http://m-ld.org/' | ||
| }; | ||
| let ctx: ActiveContext; | ||
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| beforeAll(async () => { | ||
| ctx = await activeCtx(context); | ||
| }); | ||
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| describe('expand term', () => { | ||
| test('expand prefix', () => { | ||
| expect(expandTerm('mld:hello', ctx)).toBe('http://m-ld.org/hello'); | ||
| }); | ||
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| test('ignores undefined prefix', () => { | ||
| expect(expandTerm('foo:hello', ctx)).toBe('foo:hello'); | ||
| }); | ||
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| test('leaves an IRI', () => { | ||
| expect(expandTerm('http://hello.com/', ctx)).toBe('http://hello.com/'); | ||
| }); | ||
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| test('expands against base', () => { | ||
| expect(expandTerm('hello', ctx)).toBe('http://example.org/hello'); | ||
| }); | ||
| }); | ||
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| describe('compact IRI', () => { | ||
| test('compacts with prefix', () => { | ||
| expect(compactIri('http://m-ld.org/hello', ctx)).toBe('mld:hello'); | ||
| }); | ||
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| test('ignores prefix', () => { | ||
| expect(compactIri('foo:hello', ctx)).toBe('foo:hello'); | ||
| }); | ||
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| test('leaves an unmatched IRI', () => { | ||
| expect(compactIri('http://hello.com/', ctx)).toBe('http://hello.com/'); | ||
| }); | ||
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| test('compacts using base', () => { | ||
| expect(compactIri('http://example.org/hello', ctx)).toBe('hello'); | ||
| }); | ||
| }); | ||
| }); |
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