Add per-subject RDF export endpoint

docs/api/rest-api.md

@@ -48,6 +48,7 @@ Read, change, and validate Subjects. New Subjects are created on a page — see
 | Endpoint | Description |
 |---|---|
 | `GET /neowiki/v0/subject/{subjectId}` | Fetch a Subject. Optional `revisionId`; `expand` with `page` or `relations`. |
+| `GET /neowiki/v0/subject/{subjectId}/rdf` | Export one Subject as RDF. `format` is `trig` (default) or `turtle`; `projection` is `native` (default) or an ontology target. See [RDF export](../rdf/rdf-export.md). |
 | `PUT /neowiki/v0/subject/{subjectId}` | Replace a Subject's label and statements. |
 | `DELETE /neowiki/v0/subject/{subjectId}` | Delete a Subject. |
 | `POST /neowiki/v0/subject/validate` | Check whether a new Subject is valid, without saving it. |

docs/rdf/rdf-export.md

@@ -64,26 +64,51 @@ describe the same set of entities. A warning is logged for each omitted Subject.
 
 ## Endpoint
 
-`GET /rest.php/neowiki/v0/page/{pageId}/rdf`
-
-Returns the page's projection. The `projection` query parameter selects the vocabulary: `native` (the
-default, described here) or the name of a Mapping page — see
-[Ontology Mapping](ontology-mapping.md). An unknown projection returns `400`.
-
-The format is chosen by the `format` query parameter, falling back to the `Accept` header, then to
-TriG:
+RDF is served per page or per Subject. Both take the same `projection` and `format` query parameters.
+The `projection` selects the vocabulary: `native` (the default, described here) or the name of a
+Mapping page — see [Ontology Mapping](ontology-mapping.md); an unknown projection returns `400`. The
+`format` picks the serialization, falling back to the `Accept` header, then to TriG:
 
 | `format` | `Accept` | Content-Type | Named graph |
 |---|---|---|---|
 | `trig` (default) | `application/trig` | `application/trig; charset=utf-8` | yes |
 | `turtle` | `text/turtle` | `text/turtle; charset=utf-8` | no (same triples, no graph wrapper) |
 
+### Page
+
+`GET /rest.php/neowiki/v0/page/{pageId}/rdf`
+
+Returns the page's projection: its page metadata and every Subject on it, in the page's named graph.
 Returns `404` when the page does not exist or has no NeoWiki Subject data.
 
 ```sh
 curl 'https://wiki.example/rest.php/neowiki/v0/page/42/rdf?format=turtle'
 ```
 
+### Subject
+
+`GET /rest.php/neowiki/v0/subject/{subjectId}/rdf`
+
+Returns one Subject's projection: exactly the triples the page export emits for that Subject — its
+outbound description, including the native relation reification — with none of the page-metadata
+triples, in the hosting page's named graph. Inbound relations pointing at the Subject from elsewhere
+are not included.
+
+Returns `404` when the Subject does not exist or is on a page the caller may not read — the two are
+indistinguishable. A malformed Subject ID returns `400`. A readable Subject whose Schema has no mapping
+for the requested ontology target projects to an empty graph — a `200`, not a `404`.
+
+```sh
+curl 'https://wiki.example/rest.php/neowiki/v0/subject/s1demo8aaaaaab5/rdf?projection=EDM'
+```
+
+### Finding these exports
+
+These exports are surfaced in the UI: the Data tab (`?action=subjects`) links to each Subject's JSON and
+per-projection Turtle/TriG, and to the same for the whole page. Pages that carry NeoWiki data also
+advertise the page export through `<link rel="alternate">` autodiscovery tags (Turtle and TriG, native
+projection) in the HTML head, so Linked Data tooling can locate the data without reading this reference.
+
 ## Bulk dump
 
 `maintenance/DumpRdf.php` streams the projection of **every** subject page to stdout as TriG, one named

extension.json

@@ -254,6 +254,11 @@
 			"method": [ "DELETE" ],
 			"factory": "ProfessionalWiki\\NeoWiki\\NeoWikiExtension::newDeleteSubjectApi"
 		},
+		{
+			"path": "/neowiki/v0/subject/{subjectId}/rdf",
+			"method": [ "GET" ],
+			"factory": "ProfessionalWiki\\NeoWiki\\NeoWikiExtension::newExportSubjectRdfApi"
+		},
 		{
 			"path": "/neowiki/v0/schema/{schemaName}",
 			"method": [ "GET" ],
@@ -586,7 +591,12 @@
 				"neowiki-managesubjects-id-label",
 				"neowiki-managesubjects-id-copy",
 				"neowiki-managesubjects-id-copied",
-				"neowiki-managesubjects-id-copy-error"
+				"neowiki-managesubjects-id-copy-error",
+				"neowiki-managesubjects-export-button",
+				"neowiki-managesubjects-export-json",
+				"neowiki-managesubjects-export-native",
+				"neowiki-managesubjects-export-turtle",
+				"neowiki-managesubjects-export-trig"
 			],
 			"@group:": "TODO: Load code separately while in development. Remove later.",
 			"group": "ext.neowiki"

i18n/en.json

@@ -305,5 +305,10 @@
 	"neowiki-managesubjects-id-copy": "Copy subject ID $1",
 	"neowiki-managesubjects-id-copied": "Copied \"$1\" to clipboard.",
 	"neowiki-managesubjects-id-copy-error": "Couldn't copy the subject ID.",
+	"neowiki-managesubjects-export-button": "Export",
+	"neowiki-managesubjects-export-json": "JSON",
+	"neowiki-managesubjects-export-native": "Native",
+	"neowiki-managesubjects-export-turtle": "$1 · Turtle",
+	"neowiki-managesubjects-export-trig": "$1 · TriG",
 	"action-subjects": "manage subjects on this page"
 }

i18n/qqq.json

@@ -236,5 +236,10 @@
 	"neowiki-managesubjects-id-copy": "Tooltip on the subject ID button. $1 is the Subject ID. Click copies the ID to the clipboard.",
 	"neowiki-managesubjects-id-copied": "Notification shown after the subject ID was copied. $1 is the Subject ID.",
 	"neowiki-managesubjects-id-copy-error": "Notification shown when copying the subject ID to the clipboard failed.",
+	"neowiki-managesubjects-export-button": "Label and accessible name of the button that opens the data export menu on the Data tab (per Subject, and for the whole page in the header).",
+	"neowiki-managesubjects-export-json": "Export menu item that downloads the raw JSON representation of the Subject or page.",
+	"neowiki-managesubjects-export-native": "Display name of the native (NeoWiki-vocabulary) RDF projection, used as $1 in {{msg-neowiki|neowiki-managesubjects-export-turtle}} and {{msg-neowiki|neowiki-managesubjects-export-trig}}.",
+	"neowiki-managesubjects-export-turtle": "Export menu item for the Turtle serialization of an RDF projection. $1 is the projection name (e.g. the message {{msg-neowiki|neowiki-managesubjects-export-native}}, or an ontology name such as \"EDM\"). \"Turtle\" is the name of the RDF serialization format and is not translated.",
+	"neowiki-managesubjects-export-trig": "Export menu item for the TriG serialization of an RDF projection. $1 is the projection name (e.g. the message {{msg-neowiki|neowiki-managesubjects-export-native}}, or an ontology name such as \"EDM\"). \"TriG\" is the name of the RDF serialization format and is not translated.",
 	"action-subjects": "Description of the Subject management action used by MediaWiki when generating action descriptions."
 }

resources/ext.neowiki/src/components/SubjectsManager/SubjectsManagerPage.vue

@@ -8,15 +8,28 @@
 				{{ $i18n( 'neowiki-managesubjects-count', subjects.length ).text() }}
 			</span>
 			<span v-else class="ext-neowiki-subjects-manager__count" />
-			<CdxButton
-				v-if="canCreate && !isCompletelyEmpty"
-				weight="primary"
-				action="progressive"
-				@click="onAddClicked"
-			>
-				<CdxIcon :icon="cdxIconAdd" />
-				{{ $i18n( 'neowiki-managesubjects-add-button' ).text() }}
-			</CdxButton>
+			<div class="ext-neowiki-subjects-manager__controls-actions">
+				<CdxMenuButton
+					v-if="!loading && subjects.length > 0"
+					v-model:selected="exportMenuSelection"
+					class="ext-neowiki-subjects-manager__export-menu"
+					:menu-items="pageExportItems"
+					:aria-label="$i18n( 'neowiki-managesubjects-export-button' ).text()"
+					@update:selected="openExport"
+				>
+					<CdxIcon :icon="cdxIconDownload" />
+					{{ $i18n( 'neowiki-managesubjects-export-button' ).text() }}
+				</CdxMenuButton>
+				<CdxButton
+					v-if="canCreate && !isCompletelyEmpty"
+					weight="primary"
+					action="progressive"
+					@click="onAddClicked"
+				>
+					<CdxIcon :icon="cdxIconAdd" />
+					{{ $i18n( 'neowiki-managesubjects-add-button' ).text() }}
+				</CdxButton>
+			</div>
 		</div>
 
 		<p
@@ -174,6 +187,16 @@
 									</data>
 								</button>
 							</span>
+							<CdxMenuButton
+								v-model:selected="exportMenuSelection"
+								class="ext-neowiki-subjects-manager__export-menu"
+								:menu-items="subjectExportItems( mainSubject as Subject )"
+								:aria-label="$i18n( 'neowiki-managesubjects-export-button' ).text()"
+								@update:selected="openExport"
+							>
+								<CdxIcon :icon="cdxIconDownload" />
+								{{ $i18n( 'neowiki-managesubjects-export-button' ).text() }}
+							</CdxMenuButton>
 						</footer>
 					</div>
 				</details>
@@ -320,6 +343,16 @@
 										</data>
 									</button>
 								</span>
+								<CdxMenuButton
+									v-model:selected="exportMenuSelection"
+									class="ext-neowiki-subjects-manager__export-menu"
+									:menu-items="subjectExportItems( subject )"
+									:aria-label="$i18n( 'neowiki-managesubjects-export-button' ).text()"
+									@update:selected="openExport"
+								>
+									<CdxIcon :icon="cdxIconDownload" />
+									{{ $i18n( 'neowiki-managesubjects-export-button' ).text() }}
+								</CdxMenuButton>
 							</footer>
 						</div>
 					</details>
@@ -386,6 +419,7 @@ import type { MenuButtonItemData } from '@wikimedia/codex';
 import {
 	cdxIconAdd,
 	cdxIconCollapse,
+	cdxIconDownload,
 	cdxIconDraggable,
 	cdxIconEdit,
 	cdxIconEllipsis,
@@ -406,9 +440,14 @@ import EditSummary from '@/components/common/EditSummary.vue';
 import I18nSlot from '@/components/common/I18nSlot.vue';
 import SubjectStatementsView from '@/components/SubjectsManager/SubjectStatementsView.vue';
 import { setPendingNotification } from '@/presentation/PendingNotification.ts';
+import { subjectExportMenuItems, pageExportMenuItems } from '@/presentation/DataExportMenu.ts';
 
 const pageId = Number( mw.config.get( 'wgNeoWikiManageSubjectsPageId' ) );
 
+// RDF projections readable by the viewing user (native + ontology mappings), permission-filtered
+// server-side. Drives the export menus; native is always present, so this is never truly empty.
+const rdfProjections = ( mw.config.get( 'wgNeoWikiRdfProjections' ) as string[] | null ) ?? [];
+
 const subjectStore = useSubjectStore();
 const schemaStore = useSchemaStore();
 const {
@@ -553,6 +592,26 @@ function dispatchRowAction( value: string | number | null, subject: Subject ): v
 	}
 }
 
+const exportMenuSelection = ref<string | number | null>( null );
+
+function subjectExportItems( subject: Subject ): MenuButtonItemData[] {
+	return subjectExportMenuItems( subject.getId().text, rdfProjections );
+}
+
+const pageExportItems = computed<MenuButtonItemData[]>(
+	() => pageExportMenuItems( pageId, rdfProjections )
+);
+
+// The menu item value is the export endpoint URL; open it in a new tab so the Data tab UI state
+// (expanded rows, edits in progress) survives. Codex 1.14 menu-item anchors cannot set a target,
+// so we navigate on selection rather than rely on the item's `url`.
+function openExport( value: string | number | null ): void {
+	exportMenuSelection.value = null;
+	if ( typeof value === 'string' && value !== '' ) {
+		window.open( value, '_blank', 'noopener' );
+	}
+}
+
 function toggleExpanded( id: string ): void {
 	const next = new Set( expandedIds.value );
 	if ( next.has( id ) ) {
@@ -799,6 +858,12 @@ onUnmounted( () => {
 		margin-bottom: @spacing-150;
 	}
 
+	&__controls-actions {
+		display: flex;
+		align-items: center;
+		gap: @spacing-100;
+	}
+
 	&__count {
 		color: @color-subtle;
 	}
@@ -1104,7 +1169,9 @@ onUnmounted( () => {
 
 	&__row-footer {
 		display: flex;
-		justify-content: flex-start;
+		flex-wrap: wrap;
+		align-items: center;
+		justify-content: space-between;
 		gap: @spacing-100;
 		margin-top: @spacing-100;
 		padding-top: @spacing-75;

resources/ext.neowiki/src/presentation/DataExportMenu.ts

@@ -0,0 +1,67 @@
+import type { MenuButtonItemData } from '@wikimedia/codex';
+
+/**
+ * Builds the export menu items for the Data tab: a JSON entry, then Turtle and TriG entries for each
+ * RDF projection the viewing user may read (native first, then ontology mappings). Item values are the
+ * full endpoint URLs; the menu navigates to them on selection. Kept as pure functions so the URL and
+ * label derivation is unit-tested independently of the Vue component.
+ */
+
+interface RdfFormatOption {
+	format: string;
+	messageKey: string;
+}
+
+const RDF_FORMATS: readonly RdfFormatOption[] = [
+	{ format: 'turtle', messageKey: 'neowiki-managesubjects-export-turtle' },
+	{ format: 'trig', messageKey: 'neowiki-managesubjects-export-trig' },
+];
+
+const NATIVE_PROJECTION = 'native';
+
+function restApiBase(): string {
+	return mw.util.wikiScript( 'rest' );
+}
+
+function projectionLabel( projection: string ): string {
+	return projection === NATIVE_PROJECTION ?
+		mw.msg( 'neowiki-managesubjects-export-native' ) :
+		projection;
+}
+
+function exportMenuItems(
+	jsonUrl: string,
+	rdfEndpoint: string,
+	projections: readonly string[],
+): MenuButtonItemData[] {
+	const items: MenuButtonItemData[] = [
+		{ value: jsonUrl, label: mw.msg( 'neowiki-managesubjects-export-json' ) },
+	];
+
+	for ( const projection of projections ) {
+		for ( const { format, messageKey } of RDF_FORMATS ) {
+			items.push( {
+				value: `${ rdfEndpoint }?projection=${ encodeURIComponent( projection ) }&format=${ format }`,
+				label: mw.msg( messageKey, projectionLabel( projection ) ),
+			} );
+		}
+	}
+
+	return items;
+}
+
+export function subjectExportMenuItems(
+	subjectId: string,
+	projections: readonly string[],
+): MenuButtonItemData[] {
+	const base = `${ restApiBase() }/neowiki/v0/subject/${ encodeURIComponent( subjectId ) }`;
+	return exportMenuItems( base, `${ base }/rdf`, projections );
+}
+
+export function pageExportMenuItems(
+	pageId: number,
+	projections: readonly string[],
+): MenuButtonItemData[] {
+	const base = `${ restApiBase() }/neowiki/v0/page/${ pageId }`;
+	return exportMenuItems( `${ base }/subjects`, `${ base }/rdf`, projections );
+}

resources/ext.neowiki/tests/presentation/DataExportMenu.spec.ts

@@ -0,0 +1,67 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { subjectExportMenuItems, pageExportMenuItems } from '@/presentation/DataExportMenu';
+
+describe( 'DataExportMenu', () => {
+	beforeEach( () => {
+		vi.stubGlobal( 'mw', {
+			util: { wikiScript: vi.fn( () => '/w/rest.php' ) },
+			msg: vi.fn( ( key: string, ...params: string[] ) =>
+				params.length > 0 ? `[${ key }|${ params.join( ',' ) }]` : `[${ key }]` ),
+		} );
+	} );
+
+	describe( 'subjectExportMenuItems', () => {
+		it( 'lists JSON first, then Turtle and TriG for each projection in order', () => {
+			const items = subjectExportMenuItems( 's2picasso2aaaa2', [ 'native', 'EDM' ] );
+
+			expect( items.map( ( item ) => item.value ) ).toEqual( [
+				'/w/rest.php/neowiki/v0/subject/s2picasso2aaaa2',
+				'/w/rest.php/neowiki/v0/subject/s2picasso2aaaa2/rdf?projection=native&format=turtle',
+				'/w/rest.php/neowiki/v0/subject/s2picasso2aaaa2/rdf?projection=native&format=trig',
+				'/w/rest.php/neowiki/v0/subject/s2picasso2aaaa2/rdf?projection=EDM&format=turtle',
+				'/w/rest.php/neowiki/v0/subject/s2picasso2aaaa2/rdf?projection=EDM&format=trig',
+			] );
+		} );
+
+		it( 'labels JSON, the native projection, and mapping projections distinctly', () => {
+			const items = subjectExportMenuItems( 's2picasso2aaaa2', [ 'native', 'EDM' ] );
+
+			expect( items.map( ( item ) => item.label ) ).toEqual( [
+				'[neowiki-managesubjects-export-json]',
+				'[neowiki-managesubjects-export-turtle|[neowiki-managesubjects-export-native]]',
+				'[neowiki-managesubjects-export-trig|[neowiki-managesubjects-export-native]]',
+				'[neowiki-managesubjects-export-turtle|EDM]',
+				'[neowiki-managesubjects-export-trig|EDM]',
+			] );
+		} );
+
+		it( 'percent-encodes the projection name in the RDF URLs', () => {
+			const items = subjectExportMenuItems( 's1aaaaaaaaaaaa1', [ 'Wikidata items' ] );
+
+			expect( items[ 1 ].value ).toBe(
+				'/w/rest.php/neowiki/v0/subject/s1aaaaaaaaaaaa1/rdf?projection=Wikidata%20items&format=turtle',
+			);
+		} );
+
+		it( 'returns only the JSON entry when there are no readable projections', () => {
+			const items = subjectExportMenuItems( 's1aaaaaaaaaaaa1', [] );
+
+			expect( items ).toHaveLength( 1 );
+			expect( items[ 0 ].value ).toBe( '/w/rest.php/neowiki/v0/subject/s1aaaaaaaaaaaa1' );
+		} );
+	} );
+
+	describe( 'pageExportMenuItems', () => {
+		it( 'targets the page subjects JSON and the page RDF endpoint', () => {
+			const items = pageExportMenuItems( 42, [ 'native', 'EDM' ] );
+
+			expect( items.map( ( item ) => item.value ) ).toEqual( [
+				'/w/rest.php/neowiki/v0/page/42/subjects',
+				'/w/rest.php/neowiki/v0/page/42/rdf?projection=native&format=turtle',
+				'/w/rest.php/neowiki/v0/page/42/rdf?projection=native&format=trig',
+				'/w/rest.php/neowiki/v0/page/42/rdf?projection=EDM&format=turtle',
+				'/w/rest.php/neowiki/v0/page/42/rdf?projection=EDM&format=trig',
+			] );
+		} );
+	} );
+} );