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app/code/WeltPixel/Backend/Setup/Patch/Data/GenerateCronExpression.php

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+<?php
+namespace WeltPixel\Backend\Setup\Patch\Data;
+
+use Magento\Framework\Setup\ModuleDataSetupInterface;
+use Magento\Framework\Setup\Patch\DataPatchInterface;
+use Magento\Framework\Setup\Patch\PatchVersionInterface;
+use Magento\Framework\App\Config\Storage\WriterInterface;
+
+class GenerateCronExpression implements DataPatchInterface, PatchVersionInterface
+{
+    const UPDATE_CRON_STRING_PATH = "weltpixel/crontab/license";
+
+    /** @var WriterInterface */
+    private $configWriter;
+
+    /**
+     * @var ModuleDataSetupInterface $moduleDataSetup
+     */
+    private $moduleDataSetup;
+
+    /**
+     * @param ModuleDataSetupInterface $moduleDataSetup
+     * @param WriterInterface $configWriter
+     */
+    public function __construct(
+        ModuleDataSetupInterface $moduleDataSetup,
+        WriterInterface $configWriter)
+    {
+        $this->moduleDataSetup = $moduleDataSetup;
+        $this->configWriter = $configWriter;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function apply()
+    {
+        $this->moduleDataSetup->startSetup();
+
+        $cronExpression = $this->_generateCronExpression();
+        $this->configWriter->save(self::UPDATE_CRON_STRING_PATH, $cronExpression);
+
+        $this->moduleDataSetup->endSetup();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function getVersion()
+    {
+        return '1.1.1';
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getAliases()
+    {
+        return [];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public static function getDependencies()
+    {
+        return [];
+    }
+
+    /**
+     * @return string
+     */
+    protected function _generateCronExpression()
+    {
+        $minute = rand(0, 59);
+        $hour = rand(-2, 6);
+        $dayOfWeek = rand(0, 6);
+        if ($hour < 0) {
+            $hour += 24;
+        }
+        return $minute . ' ' . $hour . ' * * ' . $dayOfWeek;
+    }
+}