shared board option show_only_assigned_cards or all due dates

Signed-off-by: Jakob Röhrl <jakob.roehrl@web.de>

lib/Migration/Version010404Date20210305.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\Deck\Migration;
+
+use Closure;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+class Version010404Date20210305 extends SimpleMigrationStep {
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		$table = $schema->getTable('deck_boards');
+        if (!$table->hasColumn('upcoming_show_only_assigned_cards')) {
+            $table->addColumn('upcoming_show_only_assigned_cards', 'boolean', [
+                'notnull' => false,
+                'default' => true
+            ]);
+        }
+        return $schema;
+	}
+}