/*
* This file is part of PKM (Persistent Knowledge Monitor).
* Copyright (c) 2020 Capgemini Group, Commissariat à l'énergie atomique et aux énergies alternatives,
* OW2, Sysgo AG, Technikon, Tree Technology, Universitat Politècnica de València.
*
* PKM is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3 as published by
* the Free Software Foundation.
*
* PKM 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with PKM. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* Delete some documents in a generic manner from a collection of a database
*
* @memberof PKM
* @instance
* @param {string} dbName - database name
* @param {string} collection_name - collection name
* @param {Object} [query] - query
*
* @return {Promise} a promise
*/
function delete_documents(dbName, collection_name, query = {})
{
return new Promise(function(resolve, reject)
{
const debug = this.debug;
const query_is_empty = Object.keys(query).length == 0;
this.get_collection(dbName, collection_name).then((documents_collection) =>
{
documents_collection.deleteMany(query).then((delete_many_result) =>
{
if(debug) console.log(delete_many_result.deletedCount + ' Document(s) deleted in collection \'' + collection_name + '\': ', query);
if(query_is_empty || delete_many_result.deletedCount)
{
resolve();
}
else
{
reject(this.NotFound());
}
}).catch((err) =>
{
reject(this.Error(err));
});
}).catch((err) =>
{
reject(this.Error(err));
});
}.bind(this));
}
exports.delete_documents = delete_documents;