Refactor readers for better di (#457)

* Refactor readers to get a proper DI

Similar to what was done with writers, readers also needed to be updated to match the new way of doing things.
This commits promotes a better DI (factories, injection through constructors).

* Escapers should not be singletons

Instead, they should be proper object that can be injected where needed.

src/Spout/Reader/XLSX/Creator/HelperFactory.php

@@ -0,0 +1,87 @@
+<?php
+
+namespace Box\Spout\Reader\XLSX\Creator;
+
+use Box\Spout\Common\Helper\Escaper;
+use Box\Spout\Reader\XLSX\Helper\CellValueFormatter;
+use Box\Spout\Reader\XLSX\Helper\SharedStringsCaching\CachingStrategyFactory;
+use Box\Spout\Reader\XLSX\Helper\SharedStringsHelper;
+use Box\Spout\Reader\XLSX\Helper\SheetHelper;
+use Box\Spout\Reader\XLSX\Helper\StyleHelper;
+
+
+/**
+ * Class EntityFactory
+ * Factory to create helpers
+ *
+ * @package Box\Spout\Reader\XLSX\Creator
+ */
+class HelperFactory extends \Box\Spout\Common\Creator\HelperFactory
+{
+    /** @var CachingStrategyFactory */
+    private $cachingStrategyFactory;
+
+    /**
+     * @param CachingStrategyFactory $cachingStrategyFactory Factory to create shared strings caching strategies
+     */
+    public function __construct(CachingStrategyFactory $cachingStrategyFactory)
+    {
+        $this->cachingStrategyFactory = $cachingStrategyFactory;
+    }
+
+    /**
+     * @param string $filePath Path of the XLSX file being read
+     * @param string $tempFolder Temporary folder where the temporary files to store shared strings will be stored
+     * @param EntityFactory $entityFactory Factory to create entities
+     * @return SharedStringsHelper
+     */
+    public function createSharedStringsHelper($filePath, $tempFolder, $entityFactory)
+    {
+        return new SharedStringsHelper($filePath, $tempFolder, $entityFactory, $this, $this->cachingStrategyFactory);
+    }
+
+    /**
+     * @param string $filePath Path of the XLSX file being read
+     * @param \Box\Spout\Common\Manager\OptionsManagerInterface $optionsManager Reader's options manager
+     * @param \Box\Spout\Reader\XLSX\Helper\SharedStringsHelper Helper to work with shared strings
+     * @param \Box\Spout\Common\Helper\GlobalFunctionsHelper $globalFunctionsHelper
+     * @param EntityFactory $entityFactory Factory to create entities
+     * @return SheetHelper
+     */
+    public function createSheetHelper($filePath, $optionsManager, $sharedStringsHelper, $globalFunctionsHelper, $entityFactory)
+    {
+        $escaper = $this->createStringsEscaper();
+        return new SheetHelper($filePath, $optionsManager, $sharedStringsHelper, $globalFunctionsHelper, $escaper, $entityFactory);
+    }
+
+    /**
+     * @param string $filePath Path of the XLSX file being read
+     * @param EntityFactory $entityFactory Factory to create entities
+     * @return StyleHelper
+     */
+    public function createStyleHelper($filePath, $entityFactory)
+    {
+        return new StyleHelper($filePath, $entityFactory);
+    }
+
+    /**
+     * @param SharedStringsHelper $sharedStringsHelper Helper to work with shared strings
+     * @param StyleHelper $styleHelper Helper to work with styles
+     * @param bool $shouldFormatDates Whether date/time values should be returned as PHP objects or be formatted as strings
+     * @return CellValueFormatter
+     */
+    public function createCellValueFormatter($sharedStringsHelper, $styleHelper, $shouldFormatDates)
+    {
+        $escaper = $this->createStringsEscaper();
+        return new CellValueFormatter($sharedStringsHelper, $styleHelper, $shouldFormatDates, $escaper);
+    }
+
+    /**
+     * @return Escaper\XLSX
+     */
+    public function createStringsEscaper()
+    {
+        /** @noinspection PhpUnnecessaryFullyQualifiedNameInspection */
+        return new Escaper\XLSX();
+    }
+}