stringify

README.md

@@ -15,6 +15,16 @@ in js file
 ```javascript
 qs = require('query-string-object')
 qs('xx=yy&zz..') // just like what is pass to the native qs.parse
+qs.stringify({
+  fInt: 1,
+  fString: 'string',
+  fObject: {
+    anobject: {a:1, b:2},
+    anything: 'thing'
+  },
+  fArray: [1,2,"string"]
+}) 
+// fInt=1&fString=string&fObject[anobject][a]=1&fObject[anobject][b]=2&fObject[anything]=thing&fArray[]=1&fArray[]=2&fArray[]=string
 ```
 
 ###Tests

index.js

@@ -1,4 +1,5 @@
-native_qs = require("querystring");
+var native_qs = require("querystring");
+var _ = require('lodash');
 
 module.exports = function(query) {
   if( ! query ) return {};
@@ -30,3 +31,50 @@ function parse( query ){
   }
   return dirty ? parse(query) : query
 }
+
+module.exports.stringify = function(obj) {
+  if (_.isObject(obj) && !_.isArray(obj)) {
+    var result = [];
+    _.each(obj, function(val, key){
+      if (_.isArray(val)) {
+        result.push(stringifyArray(key, val));
+      } else if (_.isObject(val)) {
+        result.push(stringifyObject(key, val));
+      } else {
+        result.push(key+'='+val);
+      }
+    });
+    return result.join('&');
+  } else {
+    throw new Error('Invalid Object Format');
+    return ;
+  }
+}
+
+function stringifyObject (key, obj) {
+  var result = [];
+  _.each(obj, function(val, key2){
+    key2 = key+'['+key2+']';
+    if (_.isArray(val)) {
+      result.push(stringifyArray(key2, val));
+    } else if (_.isObject(val)) {
+      result.push(stringifyObject(key2, val));
+    } else {
+      result.push(key2+'='+val);
+    }
+  });
+  return result.join('&');
+}
+
+function stringifyArray (key, obj) {
+  var result = [];
+  _.each(obj, function(val){
+    if (_.isObject(val)) {
+      // not allow any object in an array
+      throw new Error('Not Allow Any Object In An Array:'+key+'='+JSON.stringify(obj));
+    } else {
+      result.push(key+'[]=' + val);
+    }
+  });
+  return result.join('&');
+}

package.json

@@ -1,17 +1,23 @@
 {
   "name": "query-string-object",
-  "version": "0.1.1",
+  "version": "0.2.0",
   "desciption": "support object or array like what's php did: ?a[a]=1&a[b]=2 -> a={a:1,b:2}",
   "keywords": "querystring, object, array, php, query, extend, string, rest, restful",
   "homepage": "https://github.com/ericdum/querystring/",
   "bugs": "https://github.com/ericdum/querystring/issues",
   "author": "木酱 <[email protected]> (http://mujiang.info/)",
-  "repository": {"type":"git", "url": "https://github.com/ericdum/querystring"},
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/ericdum/querystring"
+  },
   "scripts": {
     "test": "./node_modules/.bin/mocha --reporter tap test.js"
   },
-  "devDependencies" : {
-    "mocha"         : "*",
-    "expect.js"     : "*"
+  "devDependencies": {
+    "mocha": "*",
+    "expect.js": "*"
+  },
+  "dependencies": {
+    "lodash": "~3.8.0"
   }
 }

test.js

@@ -64,3 +64,67 @@ describe("querystring", function(){
     });
   })
 });
+describe("querystring.stringify", function(){
+  it("normal: ?a=1&b=2", function(){
+    expect(qs.stringify({
+      a:1,
+      b:2
+    })).to.be.eql("a=1&b=2");
+  })
+  it("array: ?a=1&b[]=1&b[]=2&c=3", function(){
+    expect(qs.stringify( {
+      a:1,
+      b:[1,2],
+      c:3
+    })).to.be.eql( "a=1&b[]=1&b[]=2&c=3" );
+  })
+  it("array with single value: ?a=1&b[]=1&c=3", function(){
+    expect(qs.stringify( {
+      a:1,
+      b:[1],
+      c:3
+    })).to.be.eql( "a=1&b[]=1&c=3" );
+  })
+  it("object of number key: ?a=1&b[1]=1&c[3]=2&c=3", function(){
+    expect(qs.stringify( {
+      a:1,
+      b:{1:1},
+      c:{3:2}
+    })).to.be.eql( "a=1&b[1]=1&c[3]=2" );
+  })
+  it("object with single key: ?a=1&b[eric]=dum&c[stive]=jobs&c=3", function(){
+    expect(qs.stringify( {
+      a:1,
+      b:{
+        eric:"dum"
+      },
+      c:{
+        stive:"jobs"
+      }
+    })).to.be.eql( "a=1&b[eric]=dum&c[stive]=jobs" );
+  })
+  it("object with multiple key: ?a=1&b[eric]=dum&b[stive]=jobs&c=3", function(){
+    expect(qs.stringify( {
+      a:1,
+      b:{
+        eric:"dum",
+        stive:"jobs"
+      }, 
+      c:3
+    })).to.be.eql( "a=1&b[eric]=dum&b[stive]=jobs&c=3" );
+  })
+  it("array in object: ?a=1&b[eric][]=dum&b[stive][]=jobs&b[stive][]=fans&c=3", function(){
+    expect(qs.stringify( {
+      a:1,
+      b:{
+        eric:["dum"],
+        stive: [
+          "jobs",
+          "fans"
+        ]
+      },
+      c:3
+    })).to.be.eql( "a=1&b[eric][]=dum&b[stive][]=jobs&b[stive][]=fans&c=3");
+  })
+  //*/
+});