now using sub level and custom match_mapper, also changing matchers c…

…auses reindex

- new applyChanges method - now has callback

hash_object.js

@@ -0,0 +1,50 @@
+var crypto = require('crypto')
+
+module.exports = function(object, algo){
+  var string = canonicalJSON(object)
+  if (algo === 'djb2'){
+    return djb2(string).toString(36)
+  } else {
+    return crypto.createHash(algo || 'sha1').update(string).digest('base64')
+  }
+}
+
+function djb2(str) {
+  var hash = 5381
+  for (i = 0; i < str.length; i++) {
+    char = str.charCodeAt(i)
+    hash = ((hash << 5) + hash) + char
+  }
+  return hash
+}
+
+function canonicalJSON(object){
+  if (object == null){
+    return 'null'
+  }
+
+  var object = object.valueOf()
+
+  if (object instanceof Array){
+    var result = "["
+
+    object.forEach(function(value, i){
+      if (i > 0) result += ','
+      result += canonicalJSON(value)
+    })
+
+    return result + ']'
+  } else if (object instanceof Object){
+    var result = "{"
+
+    Object.keys(object).sort().forEach(function(key, i){
+      var value = object[key]
+      if (i > 0) result += ','
+      result += JSON.stringify(key) + ':' + canonicalJSON(value)
+    })
+
+    return result + '}'
+  } else {
+    return JSON.stringify(object)
+  }
+}