Migration: Don't use unsigned for pubdate

Signed-off-by: Sean Molenaar <sean@seanmolenaar.eu>

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is almost based on [Keep a Changelog](https://keepachangelog.com/en/1
 
 ### Changed
 
+- Use signed integer for pubdate (#997)
+
 ### Fixed
 
 - Fetch feed after creation (#1058)

lib/Migration/Version150200Date20210118190652.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\News\Migration;
+
+use Closure;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+/**
+ * Auto-generated migration step: Please modify to your needs!
+ */
+class Version150200Date20210118190652 extends SimpleMigrationStep {
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 */
+	public function preSchemaChange(IOutput $output, Closure $schemaClosure, array $options): void {
+	}
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 * @return null|ISchemaWrapper
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
+        /** @var ISchemaWrapper $schema */
+        $schema = $schemaClosure();
+
+        if ($schema->hasTable('news_items') &&
+            $schema->getTable('news_items')->hasColumn('pub_date') &&
+            $schema->getTable('news_items')->getColumn('pub_date')->getUnsigned()) {
+            $schema->getTable('news_items')
+                ->getColumn('pub_date')
+                ->setUnsigned(false);
+        }
+
+        if ($schema->hasTable('news_items') &&
+            $schema->getTable('news_items')->hasColumn('updated_date') &&
+            $schema->getTable('news_items')->getColumn('updated_date')->getUnsigned()
+        ) {
+            $schema->getTable('news_items')
+                ->getColumn('updated_date')
+                ->setUnsigned(false);
+        }
+
+        return $schema;
+	}
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 */
+	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options): void {
+	}
+}