Add isLoggingOff implementation

Author: YarnSphere

src/androidMain/kotlin/io/github/oshai/KLogger.kt

@@ -118,4 +118,11 @@ public actual interface KLogger {
    * @return True if this Logger is enabled for the ERROR level, false otherwise.
    */
   public actual val isErrorEnabled: Boolean
+
+  /**
+   * Is the logger instance OFF?
+   *
+   * @return True if this Logger is set to the OFF level, false otherwise.
+   */
+  public actual val isLoggingOff: Boolean
 }

src/androidMain/kotlin/io/github/oshai/internal/KLoggerAndroid.kt

@@ -130,4 +130,11 @@ internal class KLoggerAndroid(override val name: String) : KLogger {
    * @return True if this Logger is enabled for the ERROR level, false otherwise.
    */
   override val isErrorEnabled: Boolean = Log.isLoggable(name, Log.ERROR)
+
+  /**
+   * Is the logger instance OFF?
+   *
+   * @return True if this Logger is set to the OFF level, false otherwise.
+   */
+  override val isLoggingOff: Boolean = !Log.isLoggable(name, Log.ASSERT)
 }

src/commonMain/kotlin/io/github/oshai/KLogger.kt

@@ -123,6 +123,13 @@ public expect interface KLogger {
    * @return True if this Logger is enabled for the ERROR level, false otherwise.
    */
   public val isErrorEnabled: Boolean
+
+  /**
+   * Is the logger instance OFF?
+   *
+   * @return True if this Logger is set to the OFF level, false otherwise.
+   */
+  public val isLoggingOff: Boolean
 }
 
 /**
@@ -138,7 +145,7 @@ public fun KLogger.isEnabledForLevel(level: Level): Boolean {
     Levels.INFO_INT -> isInfoEnabled
     Levels.WARN_INT -> isWarnEnabled
     Levels.ERROR_INT -> isErrorEnabled
-    Levels.OFF_INT -> false
+    Levels.OFF_INT -> isLoggingOff
     else -> throw IllegalArgumentException("Level [$level] not recognized.")
   }
 }
@@ -261,4 +268,11 @@ public interface ActualKLogger {
    * @return True if this Logger is enabled for the ERROR level, false otherwise.
    */
   public val isErrorEnabled: Boolean
+
+  /**
+   * Is the logger instance OFF?
+   *
+   * @return True if this Logger is set to the OFF level, false otherwise.
+   */
+  public val isLoggingOff: Boolean
 }

src/jsMain/kotlin/io/github/oshai/internal/KLoggerJS.kt

@@ -7,6 +7,7 @@ import io.github.oshai.Level
 import io.github.oshai.Level.DEBUG
 import io.github.oshai.Level.ERROR
 import io.github.oshai.Level.INFO
+import io.github.oshai.Level.OFF
 import io.github.oshai.Level.TRACE
 import io.github.oshai.Level.WARN
 import io.github.oshai.Marker
@@ -166,4 +167,11 @@ internal class KLoggerJS(override val name: String) : KLogger {
    * @return True if this Logger is enabled for the ERROR level, false otherwise.
    */
   override val isErrorEnabled: Boolean = ERROR.isLoggingEnabled()
+
+  /**
+   * Is the logger instance OFF?
+   *
+   * @return True if this Logger is set to the OFF level, false otherwise.
+   */
+  override val isLoggingOff: Boolean = OFF.isLoggingEnabled()
 }

src/jsTest/kotlin/io/github/oshai/SimpleJsTest.kt

@@ -1,9 +1,6 @@
 package io.github.oshai
 
-import kotlin.test.AfterTest
-import kotlin.test.BeforeTest
-import kotlin.test.Test
-import kotlin.test.assertEquals
+import kotlin.test.*
 
 private val logger = KotlinLogging.logger("SimpleJsTest")
 
@@ -33,6 +30,7 @@ class SimpleJsTest {
   @Test
   fun offLevelJsTest() {
     KotlinLoggingConfiguration.LOG_LEVEL = Level.OFF
+    assertTrue(logger.isLoggingOff)
     logger.error { "error msg" }
     assertEquals("NA", appender.lastMessage)
     assertEquals("NA", appender.lastLevel)

src/jvmMain/kotlin/io/github/oshai/KLogger.kt

@@ -549,4 +549,12 @@ public actual interface KLogger : ActualKLogger {
    * @param t the exception (throwable) to log
    */
   public fun error(marker: Marker?, msg: String?, t: Throwable?)
+
+  /**
+   * Similar to [.isLoggingOff] method except that the marker data is also taken into consideration.
+   *
+   * @param marker The marker data to take into consideration
+   * @return True if this Logger is set to the OFF level, false otherwise.
+   */
+  public fun isLoggingOff(marker: Marker?): Boolean
 }

src/jvmMain/kotlin/io/github/oshai/jul/internal/JulLoggerWrapper.kt

@@ -379,6 +379,13 @@ internal class JulLoggerWrapper(override val underlyingLogger: Logger) : KLogger
     return underlyingLogger.isLoggable(ERROR.toJULLevel())
   }
 
+  override val isLoggingOff: Boolean
+    get() = underlyingLogger.isLoggable(OFF.toJULLevel())
+
+  override fun isLoggingOff(marker: Marker?): Boolean {
+    return underlyingLogger.isLoggable(OFF.toJULLevel())
+  }
+
   private fun io.github.oshai.Level.toJULLevel(): Level {
     val julLevel: Level =
       when (this) {

src/jvmMain/kotlin/io/github/oshai/slf4j/internal/Slf4jLoggerWrapper.kt

@@ -44,4 +44,11 @@ internal abstract class Slf4jLoggerWrapper(override val underlyingLogger: Logger
   override fun isErrorEnabled(marker: Marker?): Boolean {
     return underlyingLogger.isErrorEnabled(marker?.toSlf4j())
   }
+
+  override val isLoggingOff: Boolean
+    get() = !underlyingLogger.isErrorEnabled
+
+  override fun isLoggingOff(marker: Marker?): Boolean {
+    return !underlyingLogger.isErrorEnabled(marker?.toSlf4j())
+  }
 }

src/nativeMain/kotlin/io/github/oshai/internal/KLoggerNative.kt

@@ -177,4 +177,11 @@ internal class KLoggerNative(override val name: String) : KLogger {
    * @return True if this Logger is enabled for the ERROR level, false otherwise.
    */
   override val isErrorEnabled: Boolean = ERROR.isLoggingEnabled()
+
+  /**
+   * Is the logger instance OFF?
+   *
+   * @return True if this Logger is set to the OFF level, false otherwise.
+   */
+  override val isLoggingOff: Boolean = OFF.isLoggingEnabled()
 }

src/nativeTest/kotlin/io/github/oshai/SimpleNativeTest.kt

@@ -1,9 +1,6 @@
 package io.github.oshai
 
-import kotlin.test.AfterTest
-import kotlin.test.BeforeTest
-import kotlin.test.Test
-import kotlin.test.assertEquals
+import kotlin.test.*
 
 private val logger = KotlinLogging.logger {}
 
@@ -34,6 +31,7 @@ class SimpleNativeTest {
   @Test
   fun offLevelNativeTest() {
     KotlinLoggingConfiguration.logLevel = Level.OFF
+    assertTrue(logger.isLoggingOff)
     logger.error { "error msg" }
     assertEquals("NA", appender.lastMessage)
     assertEquals("NA", appender.lastLevel)