adding support for writuing column names

src/Goodby/CSV/Export/Standard/CsvFileObject.php

@@ -64,17 +64,12 @@ public function fputcsv($fields, $delimiter = null, $enclosure = null)
         fclose($fp);
 
         /**
-         * Because the php_fputcsv() implementation in PHP´s source code
-         * has a hardcoded "\n", this method replaces the last LF code
-         * with what the client code wishes.
+         * Because php_fputcsv() implementation in PHP source code
+         * has hardcoded "\n", this method replace last LF code
+         * with what client code wish.
          */
         $line = rtrim($line, "\n"). $this->newline;
-
-        // if the enclosure was '' | false
-        if (empty($enclosure)) {
-            $line = str_replace("\0", '', $line);
-        }
-
+
         if ( is_callable($this->csvFilter) ) {
             $line = call_user_func($this->csvFilter, $line);
         }

src/Goodby/CSV/Export/Standard/Exporter.php

@@ -51,13 +51,13 @@ public function unstrict()
      */
     public function export($filename, $rows)
     {
-        $delimiter   = $this->config->getDelimiter();
-        $enclosure   = $this->config->getEnclosure();
-        $enclosure   = empty($enclosure) ? "\0" : $enclosure;
-        $newline     = $this->config->getNewline();
-        $fromCharset = $this->config->getFromCharset();
-        $toCharset   = $this->config->getToCharset();
-        $fileMode    = $this->config->getFileMode();
+        $delimiter        = $this->config->getDelimiter();
+        $enclosure        = $this->config->getEnclosure();
+        $newline          = $this->config->getNewline();
+        $fromCharset      = $this->config->getFromCharset();
+        $toCharset        = $this->config->getToCharset();
+        $fileMode         = $this->config->getFileMode();
+        $writeColumnNames = $this->config->getWriteColumnNames();
 
         try {
             $csv = new CsvFileObject($filename, $fileMode);
@@ -73,8 +73,15 @@ public function export($filename, $rows)
             });
         }
 
+
         foreach ( $rows as $row ) {
             $this->checkRowConsistency($row);
+
+            if ($writeColumnNames) {
+                $csv->fputcsv(array_keys($row), $delimiter, $enclosure);
+                $writeColumnNames = false;
+            }
+
             $csv->fputcsv($row, $delimiter, $enclosure);
         }
         $csv->fflush();

src/Goodby/CSV/Export/Standard/ExporterConfig.php

@@ -43,6 +43,12 @@ class ExporterConfig
      */
     private $toCharset = null;
 
+    /**
+     * write column names in first line of csv
+     * @var bool
+     */
+    private $writeColumnNames = false;
+
     /**
      * File mode
      * @var string
@@ -188,4 +194,24 @@ public function getFileMode()
     {
         return $this->fileMode;
     }
+
+    /**
+     * Set option for writing column names
+     * @param bool $writeColumnNames
+     * @return ExporterConfig
+     */
+    public function setWriteColumnNames($writeColumnNames)
+    {
+        $this->writeColumnNames = $writeColumnNames;
+        return $this;
+    }
+
+    /**
+     * Return file mode
+     * @return string
+     */
+    public function getWriteColumnNames()
+    {
+        return $this->writeColumnNames;
+    }
 }

src/Goodby/CSV/Export/Tests/Standard/Unit/ExporterConfigTest.php

@@ -47,4 +47,11 @@ public function testToCharset()
         $this->assertSame(null, $config->getToCharset());
         $this->assertSame('UTF-8', $config->setToCharset('UTF-8')->getToCharset());
     }
+
+    public function testWriteColumnNames()
+    {
+        $config = new ExporterConfig();
+        $this->assertSame(false, $config->getWriteColumnNames());
+        $this->assertSame(true, $config->setWriteColumnNames(true)->getWriteColumnNames());
+    }
 }

src/Goodby/CSV/Import/Standard/Interpreter.php

@@ -84,6 +84,8 @@ private function notify($line)
      */
     private function delegate($observer, $line)
     {
+        $this->checkCallable($observer);
+
         call_user_func($observer, $line);
     }