[dotnet] Internal logging

dotnet/src/webdriver/BUILD.bazel

@@ -33,6 +33,10 @@ csharp_library(
         "**/*.cs",
     ]) + devtools_version_targets(),
     out = "WebDriver",
+    internals_visible_to = [
+        "WebDriver.Common.Tests",
+    ],
+    langversion = "10.0",
     resources = [
         "//javascript/atoms/fragments:find-elements.js",
         "//javascript/atoms/fragments:is-displayed.js",
@@ -64,6 +68,7 @@ csharp_library(
     ]) + devtools_version_targets(),
     out = "WebDriver.StrongNamed",
     keyfile = "//dotnet:WebDriver.snk",
+    langversion = "10.0",
     resources = [
         "//javascript/atoms/fragments:find-elements.js",
         "//javascript/atoms/fragments:is-displayed.js",

dotnet/src/webdriver/Chrome/ChromeDriver.cs

@@ -21,6 +21,7 @@
 using System.Collections.ObjectModel;
 using OpenQA.Selenium.Remote;
 using OpenQA.Selenium.Chromium;
+using OpenQA.Selenium.Internal.Logging;
 
 namespace OpenQA.Selenium.Chrome
 {

dotnet/src/webdriver/Internal/Logging/ConsoleLogHandler.cs

@@ -0,0 +1,49 @@
+// <copyright file="ConsoleLogHandler.cs" company="WebDriver Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// </copyright>
+
+using System;
+
+namespace OpenQA.Selenium.Internal.Logging
+{
+    /// <summary>
+    /// Represents a log handler that writes log events to the console.
+    /// </summary>
+    public class ConsoleLogHandler : ILogHandler
+    {
+        // performance trick to avoid expensive Enum.ToString() with fixed length
+        private static readonly string[] _levels = { "TRACE", "DEBUG", " INFO", " WARN", "ERROR" };
+
+        /// <summary>
+        /// Handles a log event by writing it to the console.
+        /// </summary>
+        /// <param name="logEvent">The log event to handle.</param>
+        public void Handle(LogEvent logEvent)
+        {
+            Console.Error.WriteLine($"{logEvent.Timestamp:HH:mm:ss.fff} {_levels[(int)logEvent.Level]} {logEvent.IssuedBy.Name}: {logEvent.Message}");
+        }
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="ConsoleLogHandler"/> class.
+        /// </summary>
+        /// <returns>A new instance of the <see cref="ConsoleLogHandler"/> class.</returns>
+        public ILogHandler Clone()
+        {
+            return this;
+        }
+    }
+}

dotnet/src/webdriver/Internal/Logging/ILogContext.cs

@@ -0,0 +1,83 @@
+// <copyright file="ILogContext.cs" company="WebDriver Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// </copyright>
+
+using System;
+
+namespace OpenQA.Selenium.Internal.Logging
+{
+    /// <summary>
+    /// Represents a logging context that provides methods for creating sub-contexts, retrieving loggers, emitting log messages, and configuring minimum log levels.
+    /// </summary>
+    public interface ILogContext : IDisposable
+    {
+        /// <summary>
+        /// Creates a new logging context.
+        /// </summary>
+        /// <returns>A new instance of <see cref="ILogContext"/>.</returns>
+        ILogContext CreateContext();
+
+        /// <summary>
+        /// Creates a new logging context with the specified minimum log level.
+        /// </summary>
+        /// <param name="minimumLevel">The minimum log level for the new context.</param>
+        /// <returns>A new instance of <see cref="ILogContext"/> with the specified minimum log level.</returns>
+        ILogContext CreateContext(LogEventLevel minimumLevel);
+
+        /// <summary>
+        /// Gets a logger for the specified type.
+        /// </summary>
+        /// <typeparam name="T">The type for which to retrieve the logger.</typeparam>
+        /// <returns>An instance of <see cref="ILogger"/> for the specified type.</returns>
+        internal ILogger GetLogger<T>();
+
+        /// <summary>
+        /// Gets a logger for the specified type.
+        /// </summary>
+        /// <param name="type">The type for which to retrieve the logger.</param>
+        /// <returns>An instance of <see cref="ILogger"/> for the specified type.</returns>
+        internal ILogger GetLogger(Type type);
+
+        /// <summary>
+        /// Emits a log message using the specified logger, log level, and message.
+        /// </summary>
+        /// <param name="logger">The logger to emit the log message.</param>
+        /// <param name="level">The log level of the message.</param>
+        /// <param name="message">The log message.</param>
+        internal void EmitMessage(ILogger logger, LogEventLevel level, string message);
+
+        /// <summary>
+        /// Sets the minimum log level for the current context.
+        /// </summary>
+        /// <param name="level">The minimum log level.</param>
+        /// <returns>The current instance of <see cref="ILogContext"/> with the minimum log level set.</returns>
+        ILogContext SetLevel(LogEventLevel level);
+
+        /// <summary>
+        /// Sets the minimum log level for the specified type in the current context.
+        /// </summary>
+        /// <param name="issuer">The type for which to set the minimum log level.</param>
+        /// <param name="level">The minimum log level.</param>
+        /// <returns>The current instance of <see cref="ILogContext"/> with the minimum log level set for the specified type.</returns>
+        ILogContext SetLevel(Type issuer, LogEventLevel level);
+
+        /// <summary>
+        /// Gets a list of log handlers.
+        /// </summary>
+        ILogHandlerList Handlers { get; }
+    }
+}

dotnet/src/webdriver/Internal/Logging/ILogHandler.cs

@@ -0,0 +1,38 @@
+// <copyright file="ILogHandler.cs" company="WebDriver Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// </copyright>
+
+namespace OpenQA.Selenium.Internal.Logging
+{
+    /// <summary>
+    /// Represents a log handler that handles log events.
+    /// </summary>
+    public interface ILogHandler
+    {
+        /// <summary>
+        /// Handles a log event.
+        /// </summary>
+        /// <param name="logEvent">The log event to handle.</param>
+        void Handle(LogEvent logEvent);
+
+        /// <summary>
+        /// Creates a clone of the log handler.
+        /// </summary>
+        /// <returns>A clone of the log handler.</returns>
+        ILogHandler Clone();
+    }
+}

dotnet/src/webdriver/Internal/Logging/ILogHandlerList.cs

@@ -0,0 +1,48 @@
+// <copyright file="ILogHandlerList.cs" company="WebDriver Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// </copyright>
+
+using System.Collections.Generic;
+
+namespace OpenQA.Selenium.Internal.Logging
+{
+    /// <summary>
+    /// Represents a list of log handlers.
+    /// </summary>
+    public interface ILogHandlerList : IEnumerable<ILogHandler>
+    {
+        /// <summary>
+        /// Adds a log handler to the list.
+        /// </summary>
+        /// <param name="handler">The log handler to add.</param>
+        /// <returns>The log context.</returns>
+        ILogContext Add(ILogHandler handler);
+
+        /// <summary>
+        /// Removes a log handler from the list.
+        /// </summary>
+        /// <param name="handler">The log handler to remove.</param>
+        /// <returns>The log context.</returns>
+        ILogContext Remove(ILogHandler handler);
+
+        /// <summary>
+        /// Clears all log handlers from the list.
+        /// </summary>
+        /// <returns>The log context.</returns>
+        ILogContext Clear();
+    }
+}

dotnet/src/webdriver/Internal/Logging/ILogger.cs

@@ -0,0 +1,68 @@
+// <copyright file="ILogger.cs" company="WebDriver Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// </copyright>
+
+using System;
+
+namespace OpenQA.Selenium.Internal.Logging
+{
+    /// <summary>
+    /// Defines the interface through which log messages are emitted.
+    /// </summary>
+    internal interface ILogger
+    {
+        /// <summary>
+        /// Writes a trace-level log message.
+        /// </summary>
+        /// <param name="message">The log message.</param>
+        void Trace(string message);
+
+        /// <summary>
+        /// Writes a debug-level log message.
+        /// </summary>
+        /// <param name="message">The log message.</param>
+        void Debug(string message);
+
+        /// <summary>
+        /// Writes an info-level log message.
+        /// </summary>
+        /// <param name="message">The log message.</param>
+        void Info(string message);
+
+        /// <summary>
+        /// Writes a warning-level log message.
+        /// </summary>
+        /// <param name="message">The log message.</param>
+        void Warn(string message);
+
+        /// <summary>
+        /// Writes an error-level log message.
+        /// </summary>
+        /// <param name="message">The log message.</param>
+        void Error(string message);
+
+        /// <summary>
+        /// Gets or sets the log event level.
+        /// </summary>
+        LogEventLevel Level { get; set; }
+
+        /// <summary>
+        /// Gets the type of the logger issuer.
+        /// </summary>
+        Type Issuer { get; }
+    }
+}