Can now read and write most PO files. Added simple test.

lib/po.js

@@ -1,12 +1,65 @@
-var fs = require('fs');
+var fs = require('fs')
+  , util = require('util');
 
 var PO = function() {
   this.headers = {};
   this.items = [];
 };
 
-PO.prototype.write = function(filename) {
+PO.prototype.save = function(filename, callback) {
+  var lines = ['msgid ""', 'msgstr ""']
+    , that = this;
 
+  var keys = Object.keys(this.headers);
+  keys.forEach(function(key){
+    lines.push(util.format('"%s: %s\\n"', key, that.headers[key]));
+  });
+  
+  lines.push('');
+  
+  var _processEach = function(keyword, text, i) {
+    var lines = []
+      , parts = text.split(/\n/)
+      , index = typeof i != 'undefined' ? util.format('[%d]', i) : '';
+    if (parts.length > 1) {
+      lines.push(util.format('%s%s ""', keyword, index));
+      parts.forEach(function(part){
+        lines.push(util.format('"%s"', part))
+      });
+    }
+    else {
+      lines.push(util.format('%s%s "%s"', keyword, index, text));
+    }
+    return lines;
+  }
+  
+  this.items.forEach(function(item){
+    if (item.references.length > 0) {
+      item.references.forEach(function(ref){
+        lines.push(util.format('#: %s', ref));
+      });
+      ['msgid', 'msgid_plural', 'msgstr'].forEach(function(keyword){
+        var text = item[keyword];
+        if (text != null) {
+          if (util.isArray(text) && text.length > 1) {
+            text.forEach(function(t, i){
+              lines = lines.concat(_processEach(keyword, t, i));
+            });
+          }
+          else {
+            text = util.isArray(text) ? text.join() : text;
+            lines = lines.concat(_processEach(keyword, text));
+          }
+        }
+      });
+    };
+    lines.push('');
+  });
+  
+  fs.writeFile(filename, lines.join("\n"), function(err){
+    if (err) throw err;
+    callback && callback();
+  })
 };
 
 PO.load = function(filename, callback) {
@@ -18,17 +71,21 @@ PO.load = function(filename, callback) {
     
     headers.forEach(function(header){
       if (header.match(/^"/)) {
-        var p = header.split(/:/, 2);
-        po.headers[p[0].trim()] = p[1].trim();
+        header = header.trim().replace(/^"/, '').replace(/\\n"$/, '');        
+        var p = header.split(/:/)
+          , name = p.shift().trim()
+          , value = p.join(':').trim().replace(/n$/);
+        po.headers[name] = value;
       }
     });
         
     parts.forEach(function(part){
+      if (part.length < 1) return;
       var item = PO.Item.parse(part);
       po.items.push(item);
     });
     
-    callback(po);
+    callback && callback(po);
   });
 };
 
@@ -44,7 +101,7 @@ PO.Item.parse = function(chunk) {
   var item = new PO.Item();
   var parts = chunk.split(/\nmsg/);
   
-  var extract = function(string) {
+  var _extract = function(string) {
     var lines = string.split(/\n/);
     var value = '';
     lines.forEach(function(line){
@@ -59,19 +116,17 @@ PO.Item.parse = function(chunk) {
       item.references.push(part.replace(/^#:\s/, ''));
     }
     else if (part.match(/^id\s/)) {
-      item.msgid = extract(part);
+      item.msgid = _extract(part);
     }
     else if (part.match(/id_plural/)) {
-      item.msgid_plural = extract(part);
+      item.msgid_plural = _extract(part);
     }
     else if (part.match(/str/)) {
-      item.msgstr.push(extract(part));
+      item.msgstr.push(_extract(part));
     }
   });
 
   return item;
 };
 
-PO.load('extras.po', function(po){
-  //console.log(po);
-});
+module.exports = PO;

tests/copy.po

@@ -47,4 +47,3 @@ msgid "@count entry"
 msgid_plural "@count entries"
 msgstr[0] "@count entrada"
 msgstr[1] "@count entradas"
-

tests/run.js

@@ -0,0 +1,15 @@
+var po = require('../lib/po.js')
+  , fs = require('fs')
+  , assert = require('assert')
+  , exec = require('child_process').exec;
+  
+po.load('text.po', function(_po){
+  _po.save('copy.po', function(){
+    var orig = fs.readFileSync('text.po');
+    var data = fs.readFileSync('copy.po');
+    
+    console.log(data == orig);
+    assert.equal(orig, data, 'Saved data is identical to original.');
+  });
+});
+  

tests/text.po

@@ -0,0 +1,49 @@
+msgid ""
+msgstr ""
+"Project-Id-Version: PROJECT VERSION\n"
+"POT-Creation-Date: 2011-08-12 09:55-0700\n"
+"PO-Revision-Date: 2011-12-21 22:30-0800\n"
+"Last-Translator: Mike Holly <mikejholly@gmail.com>\n"
+"Language-Team: LANGUAGE <EMAIL@ADDRESS>\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"
+
+#: strutta/strutta.admin.inc:11
+msgid "CSV file"
+msgstr "Archivo CVS"
+
+#: strutta/strutta.admin.inc:12
+msgid "Please make sure the file is formatted correctly (Name, E-mail)"
+msgstr "Por favor asegúrese de que el archivo tenga el fomato correcto (Nombre, E-mail)"
+
+#: strutta/strutta.admin.inc:18
+msgid "From address"
+msgstr "Dirección"
+
+#: strutta/strutta.admin.inc:25
+msgid "Plain text"
+msgstr "Texto plano"
+
+#: strutta/strutta.admin.inc:26
+msgid "HTML markup"
+msgstr "Formato HTML"
+
+#: strutta/strutta.admin.inc:28
+msgid "Content type"
+msgstr "Tipo de contenido"
+
+#: strutta_contests_client/strutta_contests_client.module:1381
+msgid ""
+"There is a limit of <strong>1 vote</strong> per entry over <strong>!period</strong>. \n"
+"      <br>Please come back and vote again in <strong>!retry</strong>."
+msgstr ""
+"Hay un límite de <strong>1 voto</strong> por entrada <strong>!period</strong>. \n"
+"      <br>Por favor vuelve más tarde para votar<strong>!retry</strong>.\""
+
+#: strutta_submit/strutta_submit.module:113
+msgid "@count entry"
+msgid_plural "@count entries"
+msgstr[0] "@count entrada"
+msgstr[1] "@count entradas"