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Update graph.ts #9

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11 changes: 9 additions & 2 deletions src/modules/graph.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -7,13 +7,20 @@ import { Neo4jGraph } from "@langchain/community/graphs/neo4j_graph";
let graph: Neo4jGraph;

/**
* <2> Return the existing `graph` object or create one
* Return the existing `graph` object or create one
* has not already been created
*
* @returns {Promise<Neo4jGraph>}
*/
export async function initGraph(): Promise<Neo4jGraph> {
if (!graph) {
// TODO: Create singleton and wait for connection to be verified
// Create singleton and wait for connection to be verified
graph = await Neo4jGraph.initialize({
url: process.env.NEO4J_URI as string,
username: process.env.NEO4J_USERNAME as string,
password: process.env.NEO4J_PASSWORD as string,
database: process.env.NEO4J_DATABASE as string | undefined,
});
}

return graph;
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