Changed db.create to call success even if the database already exists…

…. Added an additional parameter to db.create called failOnDuplicate, if true, db.create will behave as it used to.

lib/index.js

@@ -59,8 +59,8 @@ function _interact(verb, path, successStatus, options, host) {
     //          HTTP request type (or verb).  E.g. GET, PUT, POST, DELETE
     // path: String
     //          CouchDB resource path.
-    // successStatus: Integer
-    //          The HTTP response code we expect on a successful interaction 
+    // successStatus: Integer|Array
+    //          The HTTP response code(s) we expect on a successful interaction 
     //          with the server.
     // options: Object
     //          Options for the interaction with the server.
@@ -132,7 +132,7 @@ function _interact(verb, path, successStatus, options, host) {
             }
             responseBody = JSON.parse(responseBody);
 
-            if (response.statusCode === successStatus) {
+            if (isAcceptableStatus(response.statusCode,successStatus)) {
                 if (options.success) {
                     options.success(responseBody);
                 }
@@ -146,6 +146,30 @@ function _interact(verb, path, successStatus, options, host) {
 
 }
 
+function isAcceptableStatus(testCode, acceptable){
+    // summary:
+    //          Quick utility function to test if an HTTP response code is 
+    //          acceptable for a purpose.
+    // testCode: Integer
+    //          Code we're testing.
+    // acceptable: Integer|Array
+    //          Either an individual status code, or an array of acceptable 
+    //          status codes.
+    // returns:
+    //          True if testCode is an acceptable status code. False otherwise.
+
+    if (acceptable.constructor.toString().indexOf("Array") == -1) {
+        acceptable = [acceptable];
+    }
+
+    for(var i = 0, len = acceptable.length; i < len; i++){
+        if(acceptable[i] == testCode){
+            return true;
+        }
+    }
+    return false;
+}
+
 function encodeOptions(options) {
     // summary:
     //          Builds an HTTP query string given an object containing options 
@@ -315,8 +339,8 @@ var CouchDB = {
                 //          That is, it's the stuff that comes after 
                 //          [host]/[name]/ in a URL.  Otherwise, it's a full 
                 //          path.
-                // successStatus: Integer
-                //          HTTP status code that indicates successful 
+                // successStatus: Integer|Array
+                //          HTTP status code(s) that indicate successful 
                 //          interaction.
                 // options: Object
                 //          Standard options object.
@@ -341,7 +365,7 @@ var CouchDB = {
                 this.interact("post", "_compact", 202, options);
             },
 
-            create : function(options) {
+            create : function(options, failOnDuplicate) {
                 // summary:
                 //          Creates the database.
                 // description:
@@ -350,7 +374,19 @@ var CouchDB = {
                 //              http://wiki.apache.org/couchdb/HTTP_database_API
                 // options: Object
                 //          Standard options object.
-                this.interact("put", "", 201, options);
+                // failOnDuplicate: Boolean - Optional
+                //          If set to true, this function will fail and the 
+                //          error option callback will be run if the database 
+                //          already exists.  If set to false, or left unset, the 
+                //          success function will be called even if the database 
+                //          exists.
+
+                var acceptableStatuses = [201, 412];
+                if(failOnDuplicate){
+                    acceptableStatuses.pop();
+                }
+
+                this.interact("put", "", acceptableStatuses, options);
             },
 
             drop : function(options) {