function findOrCreatePlugin(schema) {
    schema.statics.findOrCreate = findOrCreate;
};

function findOrCreate(query, done) {
    var Model = this;
    done = done || nooperr;
    return new Promise(function(resolve, reject) {
        Model.findOne(query, function(err, doc) {
            if (doc) {
                done(null, doc);
                resolve(doc);
            } else {
                var doc = new Model(query);
                doc.save(function(err, doc) {
                    if (doc) {
                        done(null, doc);
                        resolve(doc);
                    } else {
                        done(err);
                        reject(err);
                    }
                });
            }
        });
    });
};

module.exports = findOrCreatePlugin;