text: /**
   * Copyright 2013,2014 IBM Corp.
   *
   * 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.
   **/
  
  module.exports = function(RED) {
      "use strict";
      var mongo = require('mongodb');
      var MongoClient = mongo.MongoClient;
  
      function MongoNode(n) {
          RED.nodes.createNode(this,n);
          this.hostname = n.hostname;
          this.port = n.port;
          this.db = n.db;
          this.name = n.name;
  
          var url = "mongodb://";
          if (this.credentials && this.credentials.user && this.credentials.password) {
              url += this.credentials.user+":"+this.credentials.password+"@";
          }
          url += this.hostname+":"+this.port+"/"+this.db;
  
          this.url = url;
      }
  
      RED.nodes.registerType("mongodb",MongoNode,{
          credentials: {
              user: {type:"text"},
              password: {type: "password"}
          }
      });
  
      function ensureValidSelectorObject(selector) {
          if (selector != null && (typeof selector != 'object' || Buffer.isBuffer(selector))) {
              return {};
          }
          return selector;
      }
          
      
      function MongoOutNode(n) {
          RED.nodes.createNode(this,n);
          this.collection = n.collection;
          this.mongodb = n.mongodb;
          this.payonly = n.payonly || false;
          this.upsert = n.upsert || false;
          this.multi = n.multi || false;
          this.operation = n.operation;
          this.mongoConfig = RED.nodes.getNode(this.mongodb);
  
          if (this.mongoConfig) {
              var node = this;
              MongoClient.connect(this.mongoConfig.url, function(err, db) {
                  if (err) {
                      node.error(err);
                  } else {
                      node.clientDb = db;
                      var coll;
                      if (node.collection) {
                          coll = db.collection(node.collection);
                      }
                      node.on("input",function(msg) {
                          if (!coll) {
                              if (msg.collection) {
                                  coll = db.collection(msg.collection);
                              } else {
                                  node.error("No collection defined");
                                  return;
                              }
                          }
                          delete msg._topic;
                          delete msg.collection;
                          if (node.operation === "store") {
                              if (node.payonly) {
                                  if (typeof msg.payload !== "object") {
                                      msg.payload = {"payload": msg.payload};
                                  }
                                  coll.save(msg.payload,function(err, item) {
                                      if (err) {
                                          node.error(err);
                                      }
                                  });
                              } else {
                                  coll.save(msg,function(err, item) {
                                      if (err) {
                                          node.error(err);
                                      }
                                  });
                              }
                          } else if (node.operation === "insert") {
                              if (node.payonly) {
                                  if (typeof msg.payload !== "object") {
                                      msg.payload = {"payload": msg.payload};
                                  }
                                  coll.insert(msg.payload, function(err, item) {
                                      if (err) {
                                          node.error(err);
                                      }
                                  });
                              } else {
                                  coll.insert(msg, function(err,item) {
                                      if (err) {
                                          node.error(err);
                                      }
                                  });
                              }
                          } else if (node.operation === "update") {
                              if (typeof msg.payload !== "object") {
                                  msg.payload = {"payload": msg.payload};
                              }
                              var query = msg.query || {};
                              var payload = msg.payload || {};
                              var options = {
                                  upsert: node.upsert,
                                  multi: node.multi
                              };
  
                              coll.update(query, payload, options, function(err, item) {
                                  if (err) {
                                      node.error(err + " " + payload);
                                  }
                              });
                          } else if (node.operation === "delete") {
                              coll.remove(msg.payload, function(err, items) {
                                  if (err) {
                                      node.error(err);
                                  }
                              });
                          }
                      });
                  }
              });
          } else {
              this.error("missing mongodb configuration");
          }
  
          this.on("close", function() {
              if (this.clientDb) {
                  this.clientDb.close();
              }
          });
      }
      RED.nodes.registerType("mongodb out",MongoOutNode);
  
      function MongoInNode(n) {
          RED.nodes.createNode(this,n);
          this.collection = n.collection;
          this.mongodb = n.mongodb;
          this.operation = n.operation || "find";
          this.mongoConfig = RED.nodes.getNode(this.mongodb);
  
          if (this.mongoConfig) {
              var node = this;
              MongoClient.connect(this.mongoConfig.url, function(err,db) {
                  if (err) {
                      node.error(err);
                  } else {
                      node.clientDb = db;
                      var coll;
                      if (node.collection) {
                          coll = db.collection(node.collection);
                      }
                      node.on("input", function(msg) {
                          if (!coll) {
                              if (msg.collection) {
                                  coll = db.collection(msg.collection);
                              } else {
                                  node.error("No collection defined");
                                  return;
                              }
                          }
                          if (node.operation === "find") {
                              msg.projection = msg.projection || {};
                              var selector = ensureValidSelectorObject(msg.payload);
                              coll.find(selector,msg.projection).sort(msg.sort).limit(msg.limit).toArray(function(err, items) {
                                  if (err) {
                                      node.error(err);
                                  } else {
                                      msg.payload = items;
                                      delete msg.projection;
                                      delete msg.sort;
                                      delete msg.limit;
                                      node.send(msg);
                                  }
                              });
                          } else if (node.operation === "count") {
                              var selector = ensureValidSelectorObject(msg.payload);
                              coll.count(selector, function(err, count) {
                                  if (err) {
                                      node.error(err);
                                  } else {
                                      msg.payload = count;
                                      node.send(msg);
                                  }
                              });
                          } else if (node.operation === "aggregate") {
                              msg.payload = (msg.payload instanceof Array) ? msg.payload : [];
                              coll.aggregate(msg.payload, function(err, result) {
                                  if (err) {
                                      node.error(err);
                                  } else {
                                      msg.payload = result;
                                      node.send(msg);
                                  }
                              });
                          }
                      });
                  }
              });
          } else {
              this.error("missing mongodb configuration");
          }
  
          this.on("close", function() {
              if (this.clientDb) {
                  this.clientDb.close();
              }
          });
      }
      RED.nodes.registerType("mongodb in",MongoInNode);
  }
  