refact: Add clean command improvements

Author: bastianallgeier

commands/clean/content.php

@@ -3,11 +3,14 @@
 declare(strict_types = 1);
 
 use Kirby\CLI\CLI;
+use Kirby\Cms\Languages;
 
 $cleanContent = function (
+	CLI $cli,
 	Generator $collection,
 	array|null $ignore = null,
-	string|null $lang = null
+	string $lang = 'default',
+	bool $dryrun = false,
 ): void {
 	foreach ($collection as $item) {
 		// get all fields in the content file
@@ -32,59 +35,75 @@
 		$fieldsToBeDeleted = array_diff($contentFieldKeys, $blueprintFieldKeys);
 
 		// update page only if there are any fields to be deleted
-		if (count($fieldsToBeDeleted) > 0) {
-			// create a mapping: lowercase => original field name
-			$lowercaseToOriginal = array_combine($contentFieldKeys, $originalContentKeys);
-
-			// build data array with original field names as keys and null as values
-			$data = [];
-			foreach ($fieldsToBeDeleted as $lowercaseField) {
-				$originalField = $lowercaseToOriginal[$lowercaseField];
-				$data[$originalField] = null;
-			}
+		if (count($fieldsToBeDeleted) === 0) {
+			continue;
+		}
 
-			// get the latest version of the item
-			$version = $item->version('latest');
+		// create a mapping: lowercase => original field name
+		$lowercaseToOriginal = array_combine($contentFieldKeys, $originalContentKeys);
 
-			// check if the version exists for the given language
-			// and try to update the page with the data
-			if ($version->exists($lang ?? 'default') === true) {
-				$version->update($data, $lang ?? 'default');
-			}
+		// build data array with original field names as keys and null as values
+		$data = [];
+
+		foreach ($fieldsToBeDeleted as $lowercaseField) {
+			$originalField = $lowercaseToOriginal[$lowercaseField];
+			$data[$originalField] = null;
+
+			$cli->out('Remove "' . $originalField . '" from ' . $item::CLASS_ALIAS . ' (' . $item->id() . ')');
+		}
+
+		// don't update models that have changes
+		if ($item->version('changes')->exists() === true) {
+			$cli->error('The ' . $item::CLASS_ALIAS . ' (' . $item->id() . ') has changes and cannot be cleaned. Save the changes and try again.');
+		}
+
+		// in a dry-run, the models will not be updated
+		if ($dryrun === true) {
+			continue;
+		}
+
+		// get the latest version of the item
+		$version = $item->version('latest');
+
+		// check if the version exists for the given language
+		// and try to update the page with the data
+		if ($version->exists($lang) === true) {
+			$version->update($data);
 		}
 	}
 };
 
 return [
 	'description' => 'Deletes all fields from page, file or user content files that are not defined in the blueprint, no matter if they contain content or not.',
+	'args' => [
+		'dry-run' => [
+			'description' => 'Run the command without actually updating content',
+			'noValue'     => true,
+		],
+	],
 	'command' => static function (CLI $cli) use ($cleanContent): void {
 
-		$cli->confirmToContinue('This will delete all fields from content files that are not defined in blueprints, no matter if they contain content or not. Are you sure?');
+		$kirby  = $cli->kirby();
+		$dryrun = $cli->arg('dry-run');
 
-		$kirby = $cli->kirby();
+		if ($dryrun === false) {
+			$cli->confirmToContinue('This will delete all fields from content files that are not defined in blueprints, no matter if they contain content or not. Are you sure?');
+		}
 
 		// Authenticate as almighty
 		$kirby->impersonate('kirby');
 
 		// set the fields to be ignored
 		$ignore = ['uuid', 'title', 'slug', 'template', 'sort', 'focus'];
 
-		// call the script for all languages if multilang
-		if ($kirby->multilang() === true) {
-			$languages = $kirby->languages();
-
-			foreach ($languages as $language) {
-				// should call kirby models for each loop
-				// since generators cannot be cloned
-				// otherwise run into an exception
-				$collection = $kirby->models();
-
-				$cleanContent($collection, $ignore, $language->code());
-			}
-
-		} else {
+		// go through all languages
+		foreach (Languages::ensure() as $language) {
+			// should call kirby models for each loop
+			// since generators cannot be cloned
+			// otherwise run into an exception
 			$collection = $kirby->models();
-			$cleanContent($collection, $ignore);
+
+			$cleanContent($cli, $collection, $ignore, $language->code(), $dryrun);
 		}
 
 		$cli->success('The content files have been cleaned');