feat(lexicon): configurable default value

Signed-off-by: Maxence Lange <maxence@artificial-owl.com>

6 files changed, 138 insertions, 28 deletions

diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index ffa8da43873..9809ea53508 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -1157,6 +1157,7 @@ return array(
     'OC\\Comments\\Manager' => $baseDir . '/lib/private/Comments/Manager.php',
     'OC\\Comments\\ManagerFactory' => $baseDir . '/lib/private/Comments/ManagerFactory.php',
     'OC\\Config' => $baseDir . '/lib/private/Config.php',
+    'OC\\Config\\Lexicon\\CoreConfigLexicon' => $baseDir . '/lib/private/Config/Lexicon/CoreConfigLexicon.php',
     'OC\\Config\\UserConfig' => $baseDir . '/lib/private/Config/UserConfig.php',
     'OC\\Console\\Application' => $baseDir . '/lib/private/Console/Application.php',
     'OC\\Console\\TimestampFormatter' => $baseDir . '/lib/private/Console/TimestampFormatter.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index 89c0cd4395b..f612e0d5fc6 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -1198,6 +1198,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC\\Comments\\Manager' => __DIR__ . '/../../..' . '/lib/private/Comments/Manager.php',
         'OC\\Comments\\ManagerFactory' => __DIR__ . '/../../..' . '/lib/private/Comments/ManagerFactory.php',
         'OC\\Config' => __DIR__ . '/../../..' . '/lib/private/Config.php',
+        'OC\\Config\\Lexicon\\CoreConfigLexicon' => __DIR__ . '/../../..' . '/lib/private/Config/Lexicon/CoreConfigLexicon.php',
         'OC\\Config\\UserConfig' => __DIR__ . '/../../..' . '/lib/private/Config/UserConfig.php',
         'OC\\Console\\Application' => __DIR__ . '/../../..' . '/lib/private/Console/Application.php',
         'OC\\Console\\TimestampFormatter' => __DIR__ . '/../../..' . '/lib/private/Console/TimestampFormatter.php',
diff --git a/lib/private/AppFramework/Bootstrap/RegistrationContext.php b/lib/private/AppFramework/Bootstrap/RegistrationContext.php
index f3b612edc38..77cc58c6468 100644
--- a/lib/private/AppFramework/Bootstrap/RegistrationContext.php
+++ b/lib/private/AppFramework/Bootstrap/RegistrationContext.php
@@ -11,6 +11,7 @@ namespace OC\AppFramework\Bootstrap;
 
 use Closure;
 use NCU\Config\Lexicon\IConfigLexicon;
+use OC\Config\Lexicon\CoreConfigLexicon;
 use OC\Support\CrashReport\Registry;
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IRegistrationContext;
@@ -143,7 +144,7 @@ class RegistrationContext {
 	private array $declarativeSettings = [];
 
 	/** @var array<array-key, string> */
-	private array $configLexiconClasses = [];
+	private array $configLexiconClasses = ['core' => CoreConfigLexicon::class];
 
 	/** @var ServiceRegistration<ITeamResourceProvider>[] */
 	private array $teamResourceProviders = [];
diff --git a/lib/private/Config/Lexicon/CoreConfigLexicon.php b/lib/private/Config/Lexicon/CoreConfigLexicon.php
new file mode 100644
index 00000000000..f6bc586677b
--- /dev/null
+++ b/lib/private/Config/Lexicon/CoreConfigLexicon.php
@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+namespace OC\Config\Lexicon;
+
+use NCU\Config\Lexicon\ConfigLexiconEntry;
+use NCU\Config\Lexicon\ConfigLexiconStrictness;
+use NCU\Config\Lexicon\IConfigLexicon;
+use NCU\Config\ValueType;
+
+/**
+ * ConfigLexicon for 'core' app/user configs
+ */
+class CoreConfigLexicon implements IConfigLexicon {
+	/**
+	 * @inheritDoc
+	 * @return ConfigLexiconStrictness
+	 * @since 31.0.0
+	 */
+	public function getStrictness(): ConfigLexiconStrictness {
+		return ConfigLexiconStrictness::IGNORE;
+	}
+
+	/**
+	 * @inheritDoc
+	 * @return ConfigLexiconEntry[]
+	 * @since 31.0.0
+	 */
+	public function getAppConfigs(): array {
+		return [
+			new ConfigLexiconEntry('lastcron', ValueType::INT, 0, 'timestamp of last cron execution'),
+		];
+	}
+
+	/**
+	 * @inheritDoc
+	 * @return ConfigLexiconEntry[]
+	 * @since 31.0.0
+	 */
+	public function getUserConfigs(): array {
+		return [
+			new ConfigLexiconEntry('lang', ValueType::STRING, null, 'language'),
+		];
+	}
+}
diff --git a/lib/private/Config/UserConfig.php b/lib/private/Config/UserConfig.php
index 78c43fc4321..ed225409d1c 100644
--- a/lib/private/Config/UserConfig.php
+++ b/lib/private/Config/UserConfig.php
@@ -71,6 +71,7 @@ class UserConfig implements IUserConfig {
 
 	public function __construct(
 		protected IDBConnection $connection,
+		protected IConfig $config,
 		protected LoggerInterface $logger,
 		protected ICrypto $crypto,
 	) {
@@ -711,7 +712,7 @@ class UserConfig implements IUserConfig {
 		ValueType $type,
 	): string {
 		$this->assertParams($userId, $app, $key);
-		if (!$this->matchAndApplyLexiconDefinition($app, $key, $lazy, $type, default: $default)) {
+		if (!$this->matchAndApplyLexiconDefinition($userId, $app, $key, $lazy, $type, default: $default)) {
 			return $default; // returns default if strictness of lexicon is set to WARNING (block and report)
 		}
 		$this->loadConfig($userId, $lazy);
@@ -1046,7 +1047,7 @@ class UserConfig implements IUserConfig {
 		ValueType $type,
 	): bool {
 		$this->assertParams($userId, $app, $key);
-		if (!$this->matchAndApplyLexiconDefinition($app, $key, $lazy, $type, $flags)) {
+		if (!$this->matchAndApplyLexiconDefinition($userId, $app, $key, $lazy, $type, $flags)) {
 			return false; // returns false as database is not updated
 		}
 		$this->loadConfig($userId, $lazy);
@@ -1822,6 +1823,7 @@ class UserConfig implements IUserConfig {
 	 * @throws TypeConflictException
 	 */
 	private function matchAndApplyLexiconDefinition(
+		string $userId,
 		string $app,
 		string $key,
 		bool &$lazy,
@@ -1837,20 +1839,54 @@ class UserConfig implements IUserConfig {
 		/** @var ConfigLexiconEntry $configValue */
 		$configValue = $configDetails['entries'][$key];
 		if ($type === ValueType::MIXED) {
-			$type = $configValue->getValueType(); // we overwrite if value was requested as mixed
+			// we overwrite if value was requested as mixed
+			$type = $configValue->getValueType();
 		} elseif ($configValue->getValueType() !== $type) {
 			throw new TypeConflictException('The user config key ' . $app . '/' . $key . ' is typed incorrectly in relation to the config lexicon');
 		}
 
 		$lazy = $configValue->isLazy();
-		$default = $configValue->getDefault() ?? $default; // default from Lexicon got priority
 		$flags = $configValue->getFlags();
-
 		if ($configValue->isDeprecated()) {
 			$this->logger->notice('User config key ' . $app . '/' . $key . ' is set as deprecated.');
 		}
 
-		return true;
+		$enforcedValue = $this->config->getSystemValue('lexicon.default.userconfig.enforced', [])[$app][$key] ?? false;
+		if (!$enforcedValue && $this->hasKey($userId, $app, $key, $lazy)) {
+			// if key exists there should be no need to extract default
+			return true;
+		}
+
+		// default from Lexicon got priority but it can still be overwritten by admin
+		$default = $this->getSystemDefault($app, $configValue) ?? $configValue->getDefault() ?? $default;
+
+		// returning false will make get() returning $default and set() not changing value in database
+		return !$enforcedValue;
+	}
+
+	/**
+	 * get default value set in config/config.php if stored in key:
+	 *
+	 * 'lexicon.default.userconfig' => [
+	 *        <appId> => [
+	 *           <configKey> => 'my value',
+	 *        ]
+	 *     ],
+	 *
+	 * The entry is converted to string to fit the expected type when managing default value
+	 *
+	 * @param string $appId
+	 * @param ConfigLexiconEntry $configValue
+	 *
+	 * @return string|null
+	 */
+	private function getSystemDefault(string $appId, ConfigLexiconEntry $configValue): ?string {
+		$default = $this->config->getSystemValue('lexicon.default.userconfig', [])[$appId][$configValue->getKey()] ?? null;
+		if ($default === null) {
+			return null; // no system default, using default default.
+		}
+
+		return $configValue->convertToString($default);
 	}
 
 	/**
diff --git a/lib/unstable/Config/Lexicon/ConfigLexiconEntry.php b/lib/unstable/Config/Lexicon/ConfigLexiconEntry.php
index e6c6579881d..2cf196113f7 100644
--- a/lib/unstable/Config/Lexicon/ConfigLexiconEntry.php
+++ b/lib/unstable/Config/Lexicon/ConfigLexiconEntry.php
@@ -35,25 +35,12 @@ class ConfigLexiconEntry {
 	public function __construct(
 		private readonly string $key,
 		private readonly ValueType $type,
-		null|string|int|float|bool|array $default = null,
+		private null|string|int|float|bool|array $defaultRaw = null,
 		string $definition = '',
 		private readonly bool $lazy = false,
 		private readonly int $flags = 0,
 		private readonly bool $deprecated = false,
 	) {
-		if ($default !== null) {
-			// in case $default is array but is not expected to be an array...
-			$default = ($type !== ValueType::ARRAY && is_array($default)) ? json_encode($default) : $default;
-			$this->default = match ($type) {
-				ValueType::MIXED => (string)$default,
-				ValueType::STRING => $this->convertFromString((string)$default),
-				ValueType::INT => $this->convertFromInt((int)$default),
-				ValueType::FLOAT => $this->convertFromFloat((float)$default),
-				ValueType::BOOL => $this->convertFromBool((bool)$default),
-				ValueType::ARRAY => $this->convertFromArray((array)$default)
-			};
-		}
-
 		/** @psalm-suppress UndefinedClass */
 		if (\OC::$CLI) { // only store definition if ran from CLI
 			$this->definition = $definition;
@@ -61,7 +48,7 @@ class ConfigLexiconEntry {
 	}
 
 	/**
-	 * @inheritDoc
+	 * returns the config key
 	 *
 	 * @return string config key
 	 * @experimental 31.0.0
@@ -71,7 +58,7 @@ class ConfigLexiconEntry {
 	}
 
 	/**
-	 * @inheritDoc
+	 * get expected type for config value
 	 *
 	 * @return ValueType
 	 * @experimental 31.0.0
@@ -126,17 +113,51 @@ class ConfigLexiconEntry {
 	}
 
 	/**
-	 * @inheritDoc
+	 * returns default value
 	 *
 	 * @return string|null NULL if no default is set
 	 * @experimental 31.0.0
 	 */
 	public function getDefault(): ?string {
+		if ($this->defaultRaw === null) {
+			return null;
+		}
+
+		if ($this->default === null) {
+			$this->default = $this->convertToString($this->defaultRaw);
+		}
+
 		return $this->default;
 	}
 
 	/**
-	 * @inheritDoc
+	 * convert $entry into string, based on the expected type for config value
+	 *
+	 * @param string|int|float|bool|array $entry
+	 *
+	 * @return string
+	 * @experimental 31.0.0
+	 * @psalm-suppress PossiblyInvalidCast arrays are managed pre-cast
+	 * @psalm-suppress RiskyCast
+	 */
+	public function convertToString(string|int|float|bool|array $entry): string {
+		// in case $default is array but is not expected to be an array...
+		if ($this->getValueType() !== ValueType::ARRAY && is_array($entry)) {
+			$entry = json_encode($entry, JSON_THROW_ON_ERROR);
+		}
+
+		return match ($this->getValueType()) {
+			ValueType::MIXED => (string)$entry,
+			ValueType::STRING => $this->convertFromString((string)$entry),
+			ValueType::INT => $this->convertFromInt((int)$entry),
+			ValueType::FLOAT => $this->convertFromFloat((float)$entry),
+			ValueType::BOOL => $this->convertFromBool((bool)$entry),
+			ValueType::ARRAY => $this->convertFromArray((array)$entry)
+		};
+	}
+
+	/**
+	 * returns definition
 	 *
 	 * @return string
 	 * @experimental 31.0.0
@@ -146,7 +167,7 @@ class ConfigLexiconEntry {
 	}
 
 	/**
-	 * @inheritDoc
+	 * returns if config key is set as lazy
 	 *
 	 * @see IAppConfig for details on lazy config values
 	 * @return bool TRUE if config value is lazy
@@ -157,7 +178,7 @@ class ConfigLexiconEntry {
 	}
 
 	/**
-	 * @inheritDoc
+	 * returns flags
 	 *
 	 * @see IAppConfig for details on sensitive config values
 	 * @return int bitflag about the config value
@@ -178,7 +199,7 @@ class ConfigLexiconEntry {
 	}
 
 	/**
-	 * @inheritDoc
+	 * returns if config key is set as deprecated
 	 *
 	 * @return bool TRUE if config si deprecated
 	 * @experimental 31.0.0