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RESTHeart MongoDB - GraphQL plugin

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/*-
 * ========================LICENSE_START=================================
 * restheart-graphql
 * %%
 * Copyright (C) 2020 - 2024 SoftInstigate
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 * =========================LICENSE_END==================================
 */
package org.restheart.graphql.datafetchers;

import org.bson.BsonDocument;
import org.restheart.graphql.models.FieldMapping;

import com.mongodb.client.MongoClient;

import graphql.schema.DataFetcher;
import graphql.schema.DataFetchingEnvironment;
import graphql.schema.GraphQLList;
import graphql.schema.GraphQLNonNull;
import graphql.schema.GraphQLType;

public abstract class GraphQLDataFetcher implements DataFetcher {
    protected static MongoClient mongoClient;
    protected FieldMapping fieldMapping;

    public static void setMongoClient(MongoClient mClient){
        mongoClient = mClient;
    }

    public GraphQLDataFetcher(FieldMapping fieldMapping){
        this.fieldMapping = fieldMapping;
    }

    /**
     * utility method to store the root document in the context
     * if the execution path level is 2 (when the root = source)
     * @param env
     */
    protected void storeRootDoc(DataFetchingEnvironment env) {
        BsonDocument ctx = env.getLocalContext();
        // at path level 2 the parent is the root
        if (env.getExecutionStepInfo().getPath().getLevel() == 2) {
            ctx.put("rootDoc", env.getSource());
        }
    }

    /**
     * check if type is a list also when the actual type is wrapped in GraphQLNonNull
     * @param type
     * @return true if the field type is a list
     */
    protected boolean isList(GraphQLType type) {
        if (type instanceof GraphQLList) {
            return true;
        } else if (type instanceof GraphQLNonNull nnt) {
            return isList(nnt.getWrappedType());
        }

        return false;
    }

    protected long maxTimeTotal(DataFetchingEnvironment env) {
        BsonDocument ctx = env.getLocalContext();
        return  ctx.containsKey("query-time-limit")
                ? ctx.get("query-time-limit").asInt64().getValue()
                : 0l;
    }

    protected long maxTimeLeft(DataFetchingEnvironment env) {
        BsonDocument ctx = env.getLocalContext();
        return ctx.containsKey("query-time-limit-left") ?
            ctx.get("query-time-limit-left").asInt64().getValue()
            : maxTimeTotal(env);
    }
}
    

    

    

            

    

            



    
    






    
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