Refactor writers for better DI (#427)

This commit is a big refactor that improves the code organization.
It focuses on how dependencies are injected into the different classes. This is now done via some factories.

Also, the code is now built around entities (data model that only exposes getters and setters), managers (used to manage an entity) and helpers (used by the managers to perform some specific tasks).

The refactoring is not fully complete, as some dependencies are still hidden...

src/Spout/Writer/XLSX/Writer.php

@@ -2,10 +2,8 @@
 
 namespace Box\Spout\Writer\XLSX;
 
-use Box\Spout\Writer\AbstractMultiSheetsWriter;
 use Box\Spout\Writer\Common\Options;
-use Box\Spout\Writer\Style\StyleBuilder;
-use Box\Spout\Writer\XLSX\Internal\Workbook;
+use Box\Spout\Writer\WriterMultiSheetsAbstract;
 
 /**
  * Class Writer
@@ -13,14 +11,11 @@ use Box\Spout\Writer\XLSX\Internal\Workbook;
  *
  * @package Box\Spout\Writer\XLSX
  */
-class Writer extends AbstractMultiSheetsWriter
+class Writer extends WriterMultiSheetsAbstract
 {
     /** @var string Content-Type value for the header */
     protected static $headerContentType = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
 
-    /** @var Internal\Workbook The workbook for the XLSX file */
-    protected $book;
-
     /**
      * Sets a custom temporary folder for creating intermediate files/folders.
      * This must be set before opening the writer.
@@ -54,56 +49,4 @@ class Writer extends AbstractMultiSheetsWriter
         $this->optionsManager->setOption(Options::SHOULD_USE_INLINE_STRINGS, $shouldUseInlineStrings);
         return $this;
     }
-
-    /**
-     * Configures the write and sets the current sheet pointer to a new sheet.
-     *
-     * @return void
-     * @throws \Box\Spout\Common\Exception\IOException If unable to open the file for writing
-     */
-    protected function openWriter()
-    {
-        if (!$this->book) {
-            $this->book = new Workbook($this->optionsManager);
-            $this->book->addNewSheetAndMakeItCurrent();
-        }
-    }
-
-    /**
-     * @return Internal\Workbook The workbook representing the file to be written
-     */
-    protected function getWorkbook()
-    {
-        return $this->book;
-    }
-
-    /**
-     * Adds data to the currently opened writer.
-     * If shouldCreateNewSheetsAutomatically option is set to true, it will handle pagination
-     * with the creation of new worksheets if one worksheet has reached its maximum capicity.
-     *
-     * @param array $dataRow Array containing data to be written.
-     *          Example $dataRow = ['data1', 1234, null, '', 'data5'];
-     * @param \Box\Spout\Writer\Style\Style $style Style to be applied to the row.
-     * @return void
-     * @throws \Box\Spout\Writer\Exception\WriterNotOpenedException If the book is not created yet
-     * @throws \Box\Spout\Common\Exception\IOException If unable to write data
-     */
-    protected function addRowToWriter(array $dataRow, $style)
-    {
-        $this->throwIfBookIsNotAvailable();
-        $this->book->addRowToCurrentWorksheet($dataRow, $style);
-    }
-
-    /**
-     * Closes the writer, preventing any additional writing.
-     *
-     * @return void
-     */
-    protected function closeWriter()
-    {
-        if ($this->book) {
-            $this->book->close($this->filePointer);
-        }
-    }
 }