@seriouscoderone/toposort
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Topological sort of directed ascyclic graphs (like dependecy lists)
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<h1><a href="index.html">All files</a> validators.ts</h1>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import { makeNodesHash, makeOutgoingEdges, uniqueNodes } from "./helpers.js";
export const validateEdges = (nodes: unknown[], edges: unknown[][]) => {
const nodesHash = makeNodesHash(nodes);
edges.forEach(function (edge) {
if (!nodesHash.has(edge[0]) || !nodesHash.has(edge[1])) {
throw new Error(
"Unknown node. There is an unknown node in the supplied edges."
);
}
});
};
export const validateArgs = (opts: {
edges: unknown[][];
nodes?: unknown[];
}) => {
if (!opts) {
throw new Error("No parameter provided");
}
if (!opts.edges) {
throw new Error("Missing edges in opts");
}
};
export function validateDag({
edges,
nodes = uniqueNodes(edges),
outgoing = makeOutgoingEdges(edges),
}: {
edges: unknown[][];
nodes?: unknown[];
outgoing?: Map<any, any>;
}) {
const visited = new Set();
const finished = new Set();
const dfs = (node: unknown) => {
if (finished.has(node)) {
return;
}
if (visited.has(node)) {
throw new Error("Cyclic dependency, node was:" + node);
}
visited.add(node);
outgoing.get(node).forEach((node: any) => dfs(node));
finished.add(node);
};
nodes.forEach((node) => dfs(node));
}
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