make Query a public api

lib/client.js

@@ -185,23 +185,12 @@ p._pulseQueryQueue = function() {
 };
 
 p.query = function(config, values, callback) {
-  //can take in strings or config objects
+  //can take in strings, config object or query object
-  config = (typeof(config) == 'string') ? { text: config } : config;
+  var query = (config instanceof Query) ? config : new Query(config, values, callback);
-  if (this.binary && !('binary' in config)) {
+  if (this.binary && !query.binary) {
-    config.binary = true;
+    query.binary = true;
   }
 
-  if(values) {
-    if(typeof values === 'function') {
-      callback = values;
-    } else {
-      config.values = values;
-    }
-  }
-
-  config.callback = callback;
-
-  var query = new Query(config);
   this.queryQueue.push(query);
   this._pulseQueryQueue();
   return query;

lib/index.js

@@ -13,6 +13,7 @@ var PG = function(clientConstructor) {
   EventEmitter.call(this);
   this.Client = clientConstructor;
   this.Connection = require(__dirname + '/connection');
+  this.Query = require(__dirname + '/query');
   this.defaults = defaults;
 };
 

lib/query.js

@@ -5,7 +5,21 @@ var Result = require(__dirname + '/result');
 var Types = require(__dirname + '/types');
 var utils = require(__dirname + '/utils');
 
-var Query = function(config) {
+var Query = function(config, values, callback) {
+  // use of "new" optional
+  if (!(this instanceof Query)) return new Query(config, values, callback);
+  
+  //can take in strings or config objects
+  config = (typeof(config) == 'string') ? { text: config } : config;
+  if(values) {
+    if(typeof values === 'function') {
+      callback = values;
+    } else {
+      config.values = values;
+    }
+  }
+  config.callback = callback;
+  
   this.text = config.text;
   this.values = config.values;
   this.rows = config.rows;