lincd/lib/esm/queries/QueryContext.js

LINCD is a JavaScript library for building user interfaces with linked data (also known as 'structured data', or RDF)

import { useEffect } from 'react';
import { QueryShape } from './SelectQuery.js';
import { Shape } from '../shapes/Shape.js';
import { TestNode } from '../utils/TraceShape.js';
const queryContext = new Map();
export function useQueryContext(name, initialData, shapeType) {
    useEffect(() => {
        setQueryContext(name, initialData, shapeType);
    }, [initialData, name]);
}
export function getQueryContext(name) {
    if (!queryContext.has(name)) {
        //TODO:should return something here so that the query still works and returns default values
        // like NullQueryShape or similar
        return null;
    }
    return queryContext.get(name);
}
export function setQueryContext(name, value, shapeType) {
    //if a QResult was provided
    if (value &&
        (typeof value.id === 'string' || typeof value.uri === 'string')) {
        //convert to QShape
        if (!shapeType) {
            console.warn('setQueryContext: value is a QResult but no shapeType provided', value);
            return;
        }
        const testNode = new TestNode();
        testNode.targetID = value.id || value.uri;
        const shape = new shapeType(testNode); //.getFromURI(value.id);
        value = QueryShape.create(shape);
        //const converted = QueryBuilderObject.convertOriginal(shape,null,null);
    }
    if (value instanceof Shape) {
        //convert to QShape
        value = new QueryShape(value);
    }
    else if (value && !(value instanceof QueryShape)) {
        console.warn('setQueryContext: value is not a QueryShape or Shape', value);
        return;
    }
    queryContext.set(name, value);
}
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