Fix Serilog.MinimumLevel not working and use restrictedToMinimumLevel (#17)

* fix Serilog.MinimumLevel not working and use restrictedToMinimumLevel to set default level

* optimize eventbuilder allocations.
merge GetLevel method

Author: NivalXer

src/Serilog.Sinks.Exceptionless/LoggerSinkConfigurationExtensions.cs

@@ -32,7 +32,7 @@ public static LoggerConfiguration Exceptionless(
             if (apiKey == null)
                 throw new ArgumentNullException(nameof(apiKey));
 
-            return loggerConfiguration.Sink(new ExceptionlessSink(apiKey, null, null, additionalOperation, includeProperties), restrictedToMinimumLevel);
+            return loggerConfiguration.Sink(new ExceptionlessSink(apiKey, null, null, additionalOperation, includeProperties, restrictedToMinimumLevel), restrictedToMinimumLevel);
         }
 
         /// <summary>Creates a new Exceptionless sink with the specified <paramref name="apiKey"/>.</summary>
@@ -60,7 +60,7 @@ public static LoggerConfiguration Exceptionless(
             if (apiKey == null)
                 throw new ArgumentNullException(nameof(apiKey));
 
-            return loggerConfiguration.Sink(new ExceptionlessSink(apiKey, serverUrl, defaultTags, additionalOperation, includeProperties), restrictedToMinimumLevel);
+            return loggerConfiguration.Sink(new ExceptionlessSink(apiKey, serverUrl, defaultTags, additionalOperation, includeProperties, restrictedToMinimumLevel), restrictedToMinimumLevel);
         }
 
         /// <summary>Creates a new Exceptionless sink.</summary>

src/Serilog.Sinks.Exceptionless/Sinks/Exceptionless/ExceptionlessClientExtensions.cs

@@ -13,7 +13,7 @@ public static EventBuilder CreateFromLogEvent(this ExceptionlessClient client, L
 
             var builder = log.Exception != null
                 ? client.CreateException(log.Exception)
-                : client.CreateLog(log.GetSource(), message, log.GetLevel());
+                : client.CreateLog(log.GetSource(), message, log.Level.GetLevel());
 
             builder.Target.Date = log.Timestamp;
             if (log.Level == LogEventLevel.Fatal)
@@ -36,8 +36,10 @@ internal static string GetSource(this LogEvent log) {
             return null;
         }
 
-        internal static LogLevel GetLevel(this LogEvent log) {
-            switch (log.Level) {
+        internal static LogLevel GetLevel(this LogEventLevel log)
+        {
+            switch (log)
+            {
                 case LogEventLevel.Verbose:
                     return LogLevel.Trace;
                 case LogEventLevel.Debug:

src/Serilog.Sinks.Exceptionless/Sinks/Exceptionless/ExceptionlessSink.cs

@@ -37,12 +37,16 @@ public class ExceptionlessSink : ILogEventSink, IDisposable {
         /// <param name="includeProperties">
         /// If false then the Serilog properties will not be submitted to Exceptionless
         /// </param>
+        /// <param name="restrictedToMinimumLevel">
+        /// The minimum log event level required in order to write an event to the sink.
+        /// </param>
         public ExceptionlessSink(
             string apiKey,
             string serverUrl = null,
             string[] defaultTags = null,
             Func<EventBuilder, EventBuilder> additionalOperation = null,
-            bool includeProperties = true
+            bool includeProperties = true,
+            LogEventLevel restrictedToMinimumLevel = LevelAlias.Minimum
         ) {
             if (apiKey == null)
                 throw new ArgumentNullException(nameof(apiKey));
@@ -56,6 +60,7 @@ public ExceptionlessSink(
 
                 config.UseInMemoryStorage();
                 config.UseLogger(new SelfLogLogger());
+                config.SetDefaultMinLogLevel(restrictedToMinimumLevel.GetLevel());
             });
 
             _defaultTags = defaultTags;
@@ -93,6 +98,10 @@ public void Emit(LogEvent logEvent) {
             if (logEvent == null || !_client.Configuration.IsValid)
                 return;
 
+            var minLogLevel = _client.Configuration.Settings.GetMinLogLevel(logEvent.GetSource());
+            if (logEvent.Level.GetLevel() < minLogLevel)
+                return;
+
             var builder = _client.CreateFromLogEvent(logEvent).AddTags(_defaultTags);
 
             if (_includeProperties && logEvent.Properties != null) {