Implemented the ability to override the instance of ZipContainer.

ZipContainer will be cloned before writing the zip file.
Tested custom ZipWriter, ZipReader, ZipContainer and ZipFile.

tests/Internal/Epub/EpubWriter.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace PhpZip\Tests\Internal\Epub;
+
+use PhpZip\Constants\ZipCompressionMethod;
+use PhpZip\Constants\ZipPlatform;
+use PhpZip\Exception\ZipUnsupportMethodException;
+use PhpZip\IO\ZipWriter;
+use PhpZip\Model\Data\ZipNewData;
+use PhpZip\Model\ZipEntry;
+
+/**
+ * Class EpubWriter.
+ *
+ * @property EpubZipContainer $zipContainer
+ */
+class EpubWriter extends ZipWriter
+{
+    /**
+     * @throws ZipUnsupportMethodException
+     */
+    protected function beforeWrite()
+    {
+        parent::beforeWrite();
+
+        if (!$this->zipContainer->hasEntry('mimetype')) {
+            $zipEntry = new ZipEntry('mimetype');
+            $zipEntry->setCreatedOS(ZipPlatform::OS_DOS);
+            $zipEntry->setExtractedOS(ZipPlatform::OS_DOS);
+            $zipEntry->setCompressionMethod(ZipCompressionMethod::STORED);
+            $zipEntry->setData(new ZipNewData($zipEntry, 'application/epub+zip'));
+            $this->zipContainer->addEntry($zipEntry);
+        }
+
+        $this->sortEntries();
+    }
+
+    private function sortEntries()
+    {
+        $this->zipContainer->sortByEntry(
+            static function (ZipEntry $a, ZipEntry $b) {
+                if (strcasecmp($a->getName(), 'mimetype') === 0) {
+                    return -1;
+                }
+
+                if (strcasecmp($b->getName(), 'mimetype') === 0) {
+                    return 1;
+                }
+
+                if ($a->isDirectory() && $b->isDirectory()) {
+                    return strcmp($a->getName(), $b->getName());
+                }
+
+                if ($a->isDirectory()) {
+                    return -1;
+                }
+
+                if ($b->isDirectory()) {
+                    return 1;
+                }
+
+                return strcmp($a->getName(), $b->getName());
+            }
+        );
+    }
+}