Merge pull request #4 from Level/add/encode-ltgt

add .encodeLtgt

Author: juliangruber

README.md

@@ -31,6 +31,10 @@ var codec = new Codec(db.options);
 
   Encode `batch` ops with given `opts`.
 
+### #encodeLtgt(ltgt[, opts])
+
+  Encode the ltgt values of option object `ltgt` with given `opts`.
+
 ### #decodeKey(key[, opts])
 
   Decode `key` with given `opts`.

index.js

@@ -59,6 +59,19 @@ Codec.prototype.encodeBatch = function(ops, opts){
   });
 };
 
+var ltgtKeys = ['lt', 'gt', 'lte', 'gte', 'start', 'end'];
+
+Codec.prototype.encodeLtgt = function(ltgt, opts){
+  var self = this;
+  var ret = {};
+  Object.keys(ltgt).forEach(function(key){
+    ret[key] = ltgtKeys.indexOf(key) > -1
+      ? self.encodeKey(ltgt[key], opts)
+      : ltgt[key]
+  });
+  return ret;
+};
+
 Codec.prototype.keyAsBuffer = function(opts){
   return this._keyEncoding(opts).buffer;
 };

test/ltgt.js

@@ -0,0 +1,21 @@
+var test = require('tape');
+var Codec = require('..');
+
+test('encode ltgt', function(t){
+  var ltgt = {
+    start: '686579',
+    lte: '686579'
+  };
+  var codec = new Codec({ keyEncoding: 'hex' });
+
+  var encoded = codec.encodeLtgt(ltgt);
+  t.equal(encoded.start.toString(), 'hey');
+  t.equal(encoded.lte.toString(), 'hey');
+
+  var encoded = codec.encodeLtgt(ltgt, { keyEncoding: 'json' });
+  t.equal(encoded.start, '"686579"');
+  t.equal(encoded.lte, '"686579"');
+
+  t.end();
+});
+