header order

dist/pofile.js

@@ -1,4 +1,4 @@
-require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+require=(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
 
 },{}],"pofile":[function(require,module,exports){
 var fs = require('fs');
@@ -11,6 +11,7 @@ var PO = function () {
     this.comments = [];
     this.extractedComments = [];
     this.headers = {};
+    this.headerOrder = [];
     this.items = [];
 };
 
@@ -35,9 +36,24 @@ PO.prototype.toString = function () {
     lines.push('msgid ""');
     lines.push('msgstr ""');
 
-    var keys = Object.keys(this.headers);
     var self = this;
+    var headerOrder = [];
+
+    this.headerOrder.forEach(function (key) {
+        if (key in self.headers) {
+            headerOrder.push(key);
+        }
+    });
+
+    var keys = Object.keys(this.headers);
+
     keys.forEach(function (key) {
+        if (headerOrder.indexOf(key) === -1) {
+            headerOrder.push(key);
+        }
+    });
+
+    headerOrder.forEach(function (key) {
         lines.push('"' + key + ': ' + self.headers[key] + '\\n"');
     });
 
@@ -91,6 +107,7 @@ PO.parse = function (data) {
         'Content-Transfer-Encoding': '',
         'Plural-Forms': '',
     };
+    po.headerOrder = [];
 
     headers.split(/\n/).reduce(function (acc, line) {
         if (acc.merge) {
@@ -114,6 +131,7 @@ PO.parse = function (data) {
             var name = p.shift().trim();
             var value = p.join(':').trim();
             po.headers[name] = value;
+            po.headerOrder.push(name);
         }
     });
 

lib/po.js

@@ -8,6 +8,7 @@ var PO = function () {
     this.comments = [];
     this.extractedComments = [];
     this.headers = {};
+    this.headerOrder = [];
     this.items = [];
 };
 
@@ -32,9 +33,24 @@ PO.prototype.toString = function () {
     lines.push('msgid ""');
     lines.push('msgstr ""');
 
-    var keys = Object.keys(this.headers);
     var self = this;
+    var headerOrder = [];
+
+    this.headerOrder.forEach(function (key) {
+        if (key in self.headers) {
+            headerOrder.push(key);
+        }
+    });
+
+    var keys = Object.keys(this.headers);
+
     keys.forEach(function (key) {
+        if (headerOrder.indexOf(key) === -1) {
+            headerOrder.push(key);
+        }
+    });
+
+    headerOrder.forEach(function (key) {
         lines.push('"' + key + ': ' + self.headers[key] + '\\n"');
     });
 
@@ -88,6 +104,7 @@ PO.parse = function (data) {
         'Content-Transfer-Encoding': '',
         'Plural-Forms': '',
     };
+    po.headerOrder = [];
 
     headers.split(/\n/).reduce(function (acc, line) {
         if (acc.merge) {
@@ -111,6 +128,7 @@ PO.parse = function (data) {
             var name = p.shift().trim();
             var value = p.join(':').trim();
             po.headers[name] = value;
+            po.headerOrder.push(name);
         }
     });
 

test/write.js

@@ -504,4 +504,26 @@ describe('Write', function () {
             assert.ok(po.toString().indexOf('msgctxt') >= 0);
         });
     });
+
+    it('should keep the header order', function () {
+        var input = fs.readFileSync(__dirname + '/fixtures/big.po', 'utf8');
+        var po = PO.parse(input);
+        var str = po.toString();
+
+        assertHasContiguousLines(str, [
+            'msgid ""',
+            'msgstr ""',
+            '"Project-Id-Version: Link (6.x-2.9)\\n"',
+            '"POT-Creation-Date: 2011-12-31 23:39+0000\\n"',
+            '"PO-Revision-Date: 2013-12-17 14:21+0100\\n"',
+            '"Language-Team: French\\n"',
+            '"MIME-Version: 1.0\\n"',
+            '"Content-Type: text/plain; charset=UTF-8\\n"',
+            '"Content-Transfer-Encoding: 8bit\\n"',
+            '"Plural-Forms: nplurals=2; plural=(n > 1);\\n"',
+            '"Last-Translator: Ruben Vermeersch <ruben@rocketeer.be>\\n"',
+            '"Language: fr\\n"',
+            '"X-Generator: Poedit 1.6.2\\n"',
+        ]);
+    });
 });