Laurin Weger
4 weeks ago
parent
3c004980e0
commit
ea6a860c3e
@ -0,0 +1,147 @@ |
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import type { |
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ShapeType, |
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Shape, |
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Predicate, |
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Schema, |
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} from "@nextgraph-monorepo/ng-shex-orm"; |
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interface Triple { |
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s: string; |
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p: string; |
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o: string; |
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} |
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interface TrackedSubject { |
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shape: Shape; |
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parentObject?: TrackedSubject; |
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valid?: boolean; |
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trackedPredicates: Record<string, TrackedPredicate>; |
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/** For Sub-objects only */ |
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untracked?: boolean; |
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} |
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interface TrackedPredicate { |
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shape: Predicate; |
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currentCardinality: number; |
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childSubjects?: TrackedSubject[]; |
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} |
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export function buildObjects(shapeType: ShapeType<any>) { |
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//
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} |
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export function onTriplesRemoved( |
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trackedSubjects: Record<string, TrackedSubject[]>, |
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triplesRemoved: string[][], |
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shapeType: ShapeType<any> |
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) { |
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//
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} |
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/** |
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* Adds new triples to tracked subjects and creates and returns |
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* new tracked (possibly nested) subjects. |
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*/ |
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export function onTriplesAdded( |
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trackedSubjects: Record<string, TrackedSubject[]>, |
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triplesAdded: Triple[], |
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schema: Schema, |
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rootShape?: Shape |
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): { newTrackedSubjects: Record<string, TrackedSubject[]> } { |
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// Track for secondary iterations.
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const newTrackedSubjectsCreated: Record<string, TrackedSubject[]> = {}; |
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for (const triple of triplesAdded) { |
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if (!trackedSubjects[triple.s]) { |
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// If rootShape is not set, we are applying the triples new nested objects
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// and we don't create new tracked subjects.
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if (!rootShape) continue; |
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// Check if predicate is in root shape type.
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const matchedPredicate = rootShape.predicates.find((p) => triple.p); |
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if (!matchedPredicate) { |
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// Nothing to track.
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continue; |
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} |
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// The triple should be tracked. Create new tracked subject.
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const newTrackedSubject: TrackedSubject = { |
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shape: rootShape, |
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trackedPredicates: { |
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[triple.p]: { |
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shape: matchedPredicate, |
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currentCardinality: 1, |
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}, |
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}, |
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}; |
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trackedSubjects[triple.s] = [newTrackedSubject]; |
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} else { |
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// Add triple to tracked subject(s).
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// In the case of nested shapes, the same subject can be tracked
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// in multiple shapes.
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const trackedSubjectsMatching = trackedSubjects[triple.s]; |
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for (const trackedSubject of trackedSubjectsMatching) { |
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// Is predicate tracked in this subject's shape?
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const matchedPredShape = trackedSubject.shape.predicates.find( |
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(predShape) => predShape.iri === triple.p |
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); |
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if (!matchedPredShape) continue; |
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// Get or create tracked predicate for tracked shape.
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let trackedPredicate = |
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trackedSubject.trackedPredicates[matchedPredShape?.iri]; |
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if (!trackedSubjects) { |
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trackedPredicate = { |
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currentCardinality: 0, |
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shape: matchedPredShape, |
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}; |
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} |
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// Increase cardinality.
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trackedPredicate.currentCardinality += 1; |
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// If predicate shape has nested object, track that too.
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if (trackedPredicate.shape.nestedShape) { |
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const newTrackedObject: TrackedSubject = { |
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shape: schema[matchedPredShape.nestedShape as string], |
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trackedPredicates: {}, |
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parentObject: trackedSubject, |
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}; |
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// Remember for adding to registry and for re-running on nested shapes.
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const newTracked = newTrackedSubjectsCreated[triple.o]; |
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if (!newTracked) |
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newTrackedSubjectsCreated[triple.o] = [ |
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newTrackedObject, |
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]; |
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newTracked.push(newTrackedObject); |
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// Link to parent
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const childSubjects = trackedPredicate.childSubjects; |
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if (childSubjects) childSubjects.push(newTrackedObject); |
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else trackedPredicate.childSubjects = [newTrackedObject]; |
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} |
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// TODO: Inform tracked subjects about change
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} |
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} |
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} |
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// Rerun triples on new tracked subjects created.
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// Then merge with parent tracked subjects
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const newNestedSubjectsCreated = onTriplesAdded( |
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newTrackedSubjectsCreated, |
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triplesAdded, |
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schema |
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); |
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// TODO: Is it correct to do this?
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const ret: Record<string, TrackedSubject[]> = {}; |
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for (const subjectIri of Object.keys(newTrackedSubjectsCreated)) { |
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ret[subjectIri] = [ |
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...newTrackedSubjectsCreated[subjectIri], |
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...newNestedSubjectsCreated.newTrackedSubjects[subjectIri], |
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]; |
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} |
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// Update Valid invalid
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return { newTrackedSubjects: ret }; |
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} |
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// Do we have infinite-loop issues?
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