feature: add getData for mobi

#2

Author: Gemorroj

composer.json

@@ -18,7 +18,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^11.5.15",
-        "friendsofphp/php-cs-fixer": "^3.73.1",
+        "friendsofphp/php-cs-fixer": "^3.75",
         "phpstan/phpstan": "^2.1"
     },
     "autoload": {

src/Data/MobiData.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace EbookReader\Data;
+
+use EbookReader\EbookDataInterface;
+use EbookReader\Resource\Style;
+
+final readonly class MobiData implements EbookDataInterface
+{
+    /**
+     * @param Style[] $styles
+     */
+    public function __construct(
+        private string $text,
+        private ?string $title,
+        private array $styles = [],
+    ) {
+    }
+
+    public function getText(): string
+    {
+        return $this->text;
+    }
+
+    public function getTitle(): ?string
+    {
+        return $this->title;
+    }
+
+    /**
+     * @return Style[]
+     */
+    public function getStyles(): array
+    {
+        return $this->styles;
+    }
+}

src/Decompressor/DecompressorInterface.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace EbookReader\Decompressor;
+
+interface DecompressorInterface
+{
+    public function decompress(string $data): string;
+}

src/Decompressor/PalmDocLz77.php

@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace EbookReader\Decompressor;
+
+final class PalmDocLz77 implements DecompressorInterface
+{
+    /**
+     * @var int[]
+     */
+    private array $data;
+    private int $offset = 0;
+    /**
+     * @var int[]
+     */
+    private array $buffer;
+
+    public function decompress(string $data): string
+    {
+        $this->data = \array_values(\unpack('C*', $data));
+        $this->offset = 0;
+        $this->buffer = [];
+
+        $length = \count($this->data);
+        while ($this->offset < $length) {
+            $char = $this->readByte();
+
+            if (0 === $char) {
+                $this->buffer[] = $char;
+            } elseif ($char <= 8) {
+                $this->writeLiteral($char);
+            } elseif ($char <= 0x7F) {
+                $this->buffer[] = $char;
+            } elseif ($char <= 0xBF) {
+                $this->writeBackReference($char);
+            } else {
+                $this->writeSpecial($char);
+            }
+        }
+
+        return \pack('C*', ...$this->buffer);
+    }
+
+    private function readByte(): int
+    {
+        return $this->data[$this->offset++];
+    }
+
+    private function writeLiteral(int $count): void
+    {
+        for ($i = 0; $i < $count; ++$i) {
+            $this->buffer[] = $this->readByte();
+        }
+    }
+
+    private function writeBackReference(int $char): void
+    {
+        $next = $this->readByte();
+        $distance = (($char << 8 | $next) >> 3) & 0x7FF;
+        $lzLength = ($next & 0x7) + 3;
+
+        $bufferSize = \count($this->buffer);
+        for ($i = 0; $i < $lzLength; ++$i) {
+            $this->buffer[] = $this->buffer[$bufferSize - $distance + $i];
+        }
+    }
+
+    private function writeSpecial(int $char): void
+    {
+        $this->buffer[] = 32;
+        $this->buffer[] = $char ^ 0x80;
+    }
+}