@theguild/federation-composition/esm/supergraph/validation/rules/satisfiablity/operation-path.js

Open Source Composition library for Apollo Federation

import { isFieldEdge } from "./edge.js";
import { lazy } from "./helpers.js";
export const emptyOverrideLabel = " ";
export class OperationPath {
    _rootNode;
    _toString = lazy(() => {
        let str = this._rootNode.toString();
        for (let i = 0; i < this.previousEdges.length; i++) {
            const edge = this.previousEdges[i];
            if (edge) {
                str += ` -(${edge.move})-> ${edge.tail}`;
            }
        }
        return str;
    });
    previousEdges = [];
    contextsInScope = 0n;
    get contexts() {
        return this.contextsInScope;
    }
    constructor(_rootNode) {
        this._rootNode = _rootNode;
    }
    move(edge) {
        this._toString.invalidate();
        this.previousEdges.push(edge);
        if (isFieldEdge(edge) && edge.head.contexts !== 0n) {
            this.contextsInScope |= edge.head.contexts;
        }
        return this;
    }
    clone() {
        const newPath = new OperationPath(this._rootNode);
        newPath.previousEdges = this.previousEdges.slice();
        newPath.contextsInScope = this.contextsInScope;
        return newPath;
    }
    withoutContexts() {
        const newPath = this.clone();
        newPath.contextsInScope = 0n;
        return newPath;
    }
    hasContexts(required) {
        return (this.contextsInScope & required) === required;
    }
    depth() {
        return this.previousEdges.length;
    }
    edge() {
        return this.previousEdges[this.previousEdges.length - 1];
    }
    steps() {
        return this.previousEdges.map((edge) => isFieldEdge(edge)
            ? { typeName: edge.move.typeName, fieldName: edge.move.fieldName }
            : { typeName: edge.tail.typeName });
    }
    tail() {
        return this.edge()?.tail;
    }
    rootNode() {
        return this._rootNode;
    }
    isVisitedEdge(edge) {
        return this.previousEdges.includes(edge);
    }
    toString() {
        return this._toString.get();
    }
}