Added internal GraphQL client, using GraphQL for scenes API.

src/web/graphql.js

@@ -0,0 +1,24 @@
+'use strict';
+
+const { withPostGraphileContext } = require('postgraphile');
+const { graphql } = require('graphql');
+
+const pg = require('./postgraphile');
+const logger = require('../logger')(__filename);
+
+async function query(graphqlQuery, params) {
+	return withPostGraphileContext(pg, async (context) => {
+		const schema = await pg.getGraphQLSchema();
+		const result = await graphql(schema, graphqlQuery, null, context, params);
+
+		if (result.errors?.length > 0) {
+			logger.error(result.errors);
+
+			throw result.errors[0];
+		}
+
+		return result.data;
+	});
+}
+
+module.exports = { graphql: query };