@neo4j/graphql
Version:
A GraphQL to Cypher query execution layer for Neo4j and JavaScript GraphQL implementations
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JavaScript
;
/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.createConnectionEventMeta = createConnectionEventMeta;
exports.createConnectionEventMetaObject = createConnectionEventMetaObject;
const constants_1 = require("../../constants");
function isEventMetaWithTypenames(event) {
return !!event["fromTypename"];
}
function projectAllProperties(varName) {
return `${varName} { .* }`;
}
function createConnectionEventMeta(params) {
return `${constants_1.META_CYPHER_VARIABLE} + ${createConnectionEventMetaObject(params)} AS ${constants_1.META_CYPHER_VARIABLE}`;
}
function createConnectionEventMetaObject(eventMeta) {
const { event, relVariable, typename, fromVariable, toVariable } = eventMeta;
const commonFieldsStr = `event: "${event}", timestamp: timestamp()`;
const identifiersStr = `id_from: id(${fromVariable}), id_to: id(${toVariable}), id: id(${relVariable})`;
if (isEventMetaWithTypenames(eventMeta)) {
return `{ ${[
commonFieldsStr,
identifiersStr,
`relationshipName: "${typename}", fromTypename: "${eventMeta.fromTypename}", toTypename: "${eventMeta.toTypename}"`,
`properties: { from: ${projectAllProperties(fromVariable)}, to: ${projectAllProperties(toVariable)}, relationship: ${projectAllProperties(relVariable)} }`,
].join(", ")} }`;
}
else {
return `{ ${[
commonFieldsStr,
identifiersStr,
`relationshipName: ${typename}, fromLabels: ${eventMeta.fromLabels}, toLabels: ${eventMeta.toLabels}`,
`properties: { from: ${eventMeta.fromProperties}, to: ${eventMeta.toProperties}, relationship: ${projectAllProperties(relVariable)} }`,
].join(", ")} }`;
}
}
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