1 files changed, 198 insertions, 0 deletions
diff --git a/vendor/mikespub/php-epub-meta/src/Contents/Spine.php b/vendor/mikespub/php-epub-meta/src/Contents/Spine.php
new file mode 100644
index 000000000..e6dfc2a84
--- /dev/null
+++ b/vendor/mikespub/php-epub-meta/src/Contents/Spine.php
@@ -0,0 +1,198 @@
+<?php
+
+namespace SebLucas\EPubMeta\Contents;
+
+use SebLucas\EPubMeta\Data\Item;
+use ArrayAccess;
+use Countable;
+use Iterator;
+use BadMethodCallException;
+
+/**
+ * EPUB spine structure
+ *
+ * @author Simon Schrape <simon@epubli.com>
+ * @implements \Iterator<int, Item>
+ * @implements \ArrayAccess<int, Item>
+ */
+class Spine implements Iterator, Countable, ArrayAccess
+{
+    /** @var Item */
+    protected $tocItem;
+    protected string $tocFormat;
+    /** @var array|Item[] The ordered list of all Items in this Spine. */
+    protected $items = [];
+
+    /**
+     * Spine Constructor.
+     *
+     * @param Item $tocItem The TOC Item of this Spine.
+     * @param string $tocFormat The TOC Format of this Spine (Toc or Nav).
+     */
+    public function __construct(Item $tocItem, string $tocFormat)
+    {
+        $this->tocItem = $tocItem;
+        $this->tocFormat = $tocFormat;
+    }
+
+    /**
+     * Get the TOC Item of this Spine.
+     *
+     * @return Item
+     */
+    public function getTocItem()
+    {
+        return $this->tocItem;
+    }
+
+    /**
+     * Get the TOC Format of this Spine.
+     *
+     * @return string
+     */
+    public function getTocFormat()
+    {
+        return $this->tocFormat;
+    }
+
+    /**
+     * Append an Item to this Spine.
+     *
+     * @param Item $item The Item to append to this Spine.
+     * @return void
+     */
+    public function appendItem(Item $item)
+    {
+        $this->items[] = $item;
+    }
+
+    /**
+     * Return the current Item while iterating this Spine.
+     *
+     * @link http://php.net/manual/en/iterator.current.php
+     * @return Item
+     */
+    public function current(): Item
+    {
+        return current($this->items);
+    }
+
+    /**
+     * Move forward to next Item while iterating this Spine.
+     * @link http://php.net/manual/en/iterator.next.php
+     * @return void Any returned value is ignored.
+     */
+    public function next(): void
+    {
+        next($this->items);
+    }
+
+    /**
+     * Return the index of the current Item while iterating this Spine.
+     *
+     * @link http://php.net/manual/en/iterator.key.php
+     * @return int|null on success, or null on failure.
+     */
+    public function key(): ?int
+    {
+        return key($this->items);
+    }
+
+    /**
+     * Checks if current Iterator position is valid.
+     *
+     * @link http://php.net/manual/en/iterator.valid.php
+     * @return boolean true on success or false on failure.
+     */
+    public function valid(): bool
+    {
+        return (bool) current($this->items);
+    }
+
+    /**
+     * Rewind the Iterator to the first element.
+     *
+     * @link http://php.net/manual/en/iterator.rewind.php
+     * @return void Any returned value is ignored.
+     */
+    public function rewind(): void
+    {
+        reset($this->items);
+    }
+
+    /**
+     * Get the first Item of this Spine.
+     *
+     * @return Item
+     */
+    public function first()
+    {
+        return reset($this->items);
+    }
+
+    /**
+     * Get the last Item of this Spine.
+     *
+     * @return Item
+     */
+    public function last()
+    {
+        return end($this->items);
+    }
+
+    /**
+     * Count items of this Spine.
+     *
+     * @link https://php.net/manual/en/countable.count.php
+     * @return int The number of Items contained in this Spine.
+     */
+    public function count(): int
+    {
+        return count($this->items);
+    }
+
+    /**
+     * Whether a offset exists
+     * @link https://php.net/manual/en/arrayaccess.offsetexists.php
+     * @param int $offset An offset to check for.
+     * @return boolean true on success or false on failure.
+     */
+    public function offsetExists($offset): bool
+    {
+        return isset($this->items[$offset]);
+    }
+
+    /**
+     * Offset to retrieve
+     * @link https://php.net/manual/en/arrayaccess.offsetget.php
+     * @param int $offset The offset to retrieve.
+     * @return Item
+     */
+    public function offsetGet($offset): Item
+    {
+        return $this->items[$offset];
+    }
+
+    /**
+     * Offset to set
+     * @link https://php.net/manual/en/arrayaccess.offsetset.php
+     * @param mixed $offset The offset to assign the value to.
+     * @param mixed $value The value to set.
+     * @throws BadMethodCallException
+     */
+    public function offsetSet($offset, $value): void
+    {
+        throw new BadMethodCallException("Only reading array access is supported!");
+    }
+
+    /**
+     * Offset to unset
+     * @link https://php.net/manual/en/arrayaccess.offsetunset.php
+     * @param mixed $offset The offset to unset.
+     * @throws BadMethodCallException
+     */
+    public function offsetUnset($offset): void
+    {
+        throw new BadMethodCallException("Only reading array access is supported!");
+    }
+}