Major Refactoring

_test/BookCreatorLiveSelectionCollectorTest.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace dokuwiki\plugin\dw2pdf\test;
+
+use dokuwiki\plugin\dw2pdf\src\BookCreatorLiveSelectionCollector;
+use dokuwiki\plugin\dw2pdf\src\Config;
+use DokuWikiTest;
+
+/**
+ * @group plugin_dw2pdf
+ * @group plugins
+ */
+class BookCreatorLiveSelectionCollectorTest extends DokuWikiTest
+{
+    public function setUp(): void
+    {
+        parent::setUp();
+        $_REQUEST = [];
+    }
+
+    /**
+     * Live selections should be decoded and normalized via cleanID().
+     */
+    public function testCollectsPagesFromJsonSelection(): void
+    {
+        global $INPUT;
+        $pageA = 'playground:bookcreator:a';
+        $pageB = 'playground:bookcreator:Child';
+        $pageC = 'playground:bookcreator:nonexistent';
+        saveWikiText($pageA, 'A', 'create');
+        saveWikiText($pageB, 'B', 'create');
+
+        // page B has mixed case to test cleanID()
+        $INPUT->set('selection', json_encode([$pageA, $pageB, $pageC])); // page B has mixed case to test cleanID()
+
+        $collector = new BookCreatorLiveSelectionCollector(new Config());
+        $this->assertSame(
+            [$pageA, 'playground:bookcreator:child'], // page C should be skipped as it does not exist
+            $collector->getPages()
+        );
+    }
+
+    /**
+     * Invalid JSON payloads must bubble up as JsonException so the caller can handle them.
+     */
+    public function testThrowsOnInvalidJson(): void
+    {
+        global $INPUT;
+        $INPUT->set('selection', '{invalid');
+
+        $this->expectException(\JsonException::class);
+        new BookCreatorLiveSelectionCollector(new Config());
+    }
+}