@graphql-mesh/neo4j/index.cjs.js

'use strict';

function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }

const neo4jGraphqlJs = require('neo4j-graphql-js');
const neo4j = _interopDefault(require('neo4j-driver'));

class Neo4JHandler {
    constructor({ name, cache, config, pubsub }) {
        this.name = name;
        this.cache = cache;
        this.config = config;
        this.pubsub = pubsub;
    }
    getDriver() {
        if (!this.driver) {
            this.driver = neo4j.driver(this.config.url, neo4j.auth.basic(this.config.username, this.config.password));
            this.pubsub.subscribe('destroy', () => this.driver.close());
        }
        return this.driver;
    }
    async getMeshSource() {
        let typeDefs;
        const cacheKey = this.name + '_introspection';
        if (this.config.cacheIntrospection) {
            typeDefs = await this.cache.get(cacheKey);
        }
        if (!typeDefs) {
            const inferredSchema = await neo4jGraphqlJs.inferSchema(this.getDriver(), {
                alwaysIncludeRelationships: this.config.alwaysIncludeRelationships,
            });
            typeDefs = inferredSchema.typeDefs;
            if (this.config.cacheIntrospection) {
                await this.cache.set(cacheKey, typeDefs);
            }
        }
        const schema = neo4jGraphqlJs.makeAugmentedSchema({ typeDefs });
        return {
            schema,
            contextBuilder: async () => ({ driver: this.getDriver(), neo4jDatabase: this.config.database }),
        };
    }
}

module.exports = Neo4JHandler;
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