schema.graphql

type Step @exclude {
  latitude: Float
  longitude: Float
}
type Tag @exclude {
  key: String
  value: String
}
type PointOfInterest @exclude(operations: [CREATE, UPDATE, DELETE]) {
  name: String
  location: Point
  type: String
  wikipedia: String
    @cypher(
      statement: """
      MATCH (this)-->(t:OSMTags)
      WHERE EXISTS(t.wikipedia) WITH t LIMIT 1
      CALL apoc.load.json('https://en.wikipedia.org/w/api.php?action=parse&prop=text&formatversion=2&format=json&page=' + apoc.text.urlencode(t.wikipedia)) YIELD value
      RETURN value.parse.text
      """
    )
  tags(limit: Int = 10): [Tag]
    @cypher(
      statement: """
      MATCH (this)-->(t:OSMTags)
      UNWIND keys(t)[0..$limit] AS key
      RETURN {key: key, value: t[key]} AS tag
      """
    )
  routeToPOI(name: String!): [Step]
    @cypher(
      statement: """
      MATCH (other:PointOfInterest {name: $name})
      CALL gds.beta.shortestPath.dijkstra.stream({
        nodeProjection: 'OSMNode',
          relationshipProjection: {
            ROUTE: {
                type: 'ROUTE',
                  properties: 'distance',
                  orientation: 'UNDIRECTED'
              }
          },
          sourceNode: id(this),
          targetNode: id(other),
          relationshipWeightProperty: 'distance'
      })
      YIELD nodeIds
      WITH [nodeId IN nodeIds | gds.util.asNode(nodeId)] AS pathNodes
      UNWIND pathNodes AS node
      RETURN {latitude: node.location.latitude, longitude: node.location.longitude} AS route
      """
    )
}