re-written exporter for simpler extendability (#1349)

src/Export/ExportItemInterface.php

@@ -0,0 +1,52 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Export;
+
+use App\Entity\MetaTableTypeInterface;
+use App\Invoice\InvoiceItemInterface;
+
+interface ExportItemInterface extends InvoiceItemInterface
+{
+    /**
+     * A name representation for this type of export.
+     *
+     * @return string
+     */
+    public function getType(): string;
+
+    /**
+     * A name representation for the category of this type.
+     *
+     * @return string
+     */
+    public function getCategory(): string;
+
+    /**
+     * Whether this item was already exported.
+     *
+     * @return bool
+     */
+    public function isExported(): bool;
+
+    /**
+     * Returns the named meta field or null.
+     *
+     * @param string $name
+     * @return MetaTableTypeInterface|null
+     */
+    public function getMetaField(string $name): ?MetaTableTypeInterface;
+
+    /**
+     * Returns all assigned tag names.
+     *
+     * @return string[]
+     */
+    public function getTagsAsArray(): array;
+}