Allow for missing whitelines.

Dumper/PoFileDumper.php

@@ -27,9 +27,16 @@ public function format(MessageCatalogue $messages, $domain = 'messages')
     {
         $output = '';
 
+        $newLine = FALSE;
         foreach ($messages->all($domain) as $source => $target) {
-            $output .= sprintf("msgid \"%s\"\n", $this->escape($source));
-            $output .= sprintf("msgstr \"%s\"\n\n", $this->escape($target));
+            if ($newLine) {
+              $output .= "\n";
+            }
+            else {
+              $newLine = TRUE;
+            }
+            $output .= sprintf('msgid "%s"' . "\n", $this->escape($source));
+            $output .= sprintf('msgstr "%s"', $this->escape($target));
         }
 
         return $output;

Loader/PoFileLoader.php

@@ -15,6 +15,7 @@
 
 /**
  * @copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/)
+ * @copyright Copyright (c) 2012, Clemens Tolboom
  */
 class PoFileLoader extends ArrayLoader implements LoaderInterface
 {
@@ -41,6 +42,36 @@ public function load($resource, $locale, $domain = 'messages')
     /**
      * Parses portable object (PO) format.
      *
+     * From http://www.gnu.org/software/gettext/manual/gettext.html#PO-Files
+     * we should be able to parse files having:
+     *
+     * white-space
+     * #  translator-comments
+     * #. extracted-comments
+     * #: reference...
+     * #, flag...
+     * #| msgid previous-untranslated-string
+     * msgid untranslated-string
+     * msgstr translated-string
+     *
+     * extra or different lines are:
+     *
+     * #| msgctxt previous-context
+     * #| msgid previous-untranslated-string
+     * msgctxt context
+     *
+     * #| msgid previous-untranslated-string-singular
+     * #| msgid_plural previous-untranslated-string-plural
+     * msgid untranslated-string-singular
+     * msgid_plural untranslated-string-plural
+     * msgstr[0] translated-string-case-0
+     * ...
+     * msgstr[N] translated-string-case-n
+     *
+     * The definition states:
+     * - white-space and comments are optional.
+     * - msgid "" that an empty singleline defines a header.
+     *
      * This parser sacrifices some features of the reference implementation the
      * differences to that implementation are as follows.
      * - No support for comments spanning multiple lines.
@@ -69,20 +100,14 @@ private function parse($resource)
             $line = trim($line);
 
             if ($line === '') {
-                if (is_array($item['translated'])) {
-                    $messages[$item['ids']['singular']] = stripslashes($item['translated'][0]);
-                    if (isset($item['ids']['plural'])) {
-                        $plurals = array();
-                        foreach ($item['translated'] as $plural => $translated) {
-                            $plurals[] = sprintf('{%d} %s', $plural, $translated);
-                        }
-                        $messages[$item['ids']['plural']] = stripcslashes(implode('|', $plurals));
-                    }
-                } elseif(!empty($item['ids']['singular'])) {
-                    $messages[$item['ids']['singular']] = stripslashes($item['translated']);
-                }
+                // Whitespace indicated current item is done
+                $this->addMessage($messages, $item);
                 $item = $defaults;
             } elseif (substr($line, 0, 7) === 'msgid "') {
+                // We start a new msg so save previous
+                // TODO: this fails when comments or contexts are added
+                $this->addMessage($messages, $item);
+                $item = $defaults;
                 $item['ids']['singular'] = substr($line, 7, -1);
             } elseif (substr($line, 0, 8) === 'msgstr "') {
                 $item['translated'] = substr($line, 8, -1);
@@ -103,8 +128,41 @@ private function parse($resource)
             }
 
         }
+        // save last item
+        $this->addMessage($messages, $item);
         fclose($stream);
 
         return array_filter($messages);
     }
+
+    /**
+     * Save a translation item to the messeages.
+     *
+     * A .po file could contain by error missing plural indexes. We need to
+     * fix these before saving them.
+     *
+     * @param array $messages
+     * @param array $item
+     */
+    private function addMessage(array &$messages, array $item)
+    {
+        if (is_array($item['translated'])) {
+            $messages[$item['ids']['singular']] = stripslashes($item['translated'][0]);
+            if (isset($item['ids']['plural'])) {
+                $plurals = $item['translated'];
+                // PO are by definition indexed so sort by index.
+                ksort($plurals);
+                // Make sure every index is filled.
+                end($plurals);
+                $count = key($plurals);
+                // Fill missing spots with '-'.
+                $empties = array_fill(0, $count+1, '-');
+                $plurals += $empties;
+                ksort($plurals);
+                $messages[$item['ids']['plural']] = stripcslashes(implode('|', $plurals));
+            }
+        } elseif(!empty($item['ids']['singular'])) {
+              $messages[$item['ids']['singular']] = stripslashes($item['translated']);
+        }
+    }
 }

Tests/Loader/PoFileLoaderTest.php

@@ -39,7 +39,7 @@ public function testLoadPlurals()
         $resource = __DIR__.'/../fixtures/plurals.po';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar', 'foos' => '{0} bar|{1} bars'), $catalogue->all('domain1'));
+        $this->assertEquals(array('foo' => 'bar', 'foos' => 'bar|bars'), $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
         $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
     }

Tests/fixtures/resources.po

@@ -1,3 +1,2 @@
 msgid "foo"
-msgstr "bar"
-
+msgstr "bar"