From d39abe603daa03dd4874dca12d6ad8fe1cbc1c86 Mon Sep 17 00:00:00 2001
From: Ellpeck <me@ellpeck.de>
Date: Thu, 30 Nov 2023 22:46:16 +0100
Subject: [PATCH] added LogWriter class

---
 ExtremelySimpleLogger/LogWriter.cs | 82 ++++++++++++++++++++++++++++++
 Sample/Program.cs                  |  8 ++-
 2 files changed, 89 insertions(+), 1 deletion(-)
 create mode 100644 ExtremelySimpleLogger/LogWriter.cs

diff --git a/ExtremelySimpleLogger/LogWriter.cs b/ExtremelySimpleLogger/LogWriter.cs
new file mode 100644
index 0000000..6f92ea1
--- /dev/null
+++ b/ExtremelySimpleLogger/LogWriter.cs
@@ -0,0 +1,82 @@
+using System;
+using System.IO;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ExtremelySimpleLogger {
+    /// <summary>
+    /// Implementation of a <see cref="TextWriter"/> that writes to a <see cref="Logger"/>.
+    /// </summary>
+    public class LogWriter : TextWriter {
+
+        /// <summary>
+        /// The log level that this log writer should write with.
+        /// </summary>
+        public LogLevel Level {
+            get {
+                lock (this.logger)
+                    return this.level;
+            }
+            set {
+                lock (this.logger)
+                    this.level = value;
+            }
+        }
+
+        /// <inheritdoc />
+        public override Encoding Encoding => Encoding.UTF8;
+
+        private readonly StringBuilder line = new StringBuilder();
+        private readonly Logger logger;
+
+        private LogLevel level;
+
+        /// <summary>
+        /// Creates a new log writer with the given settings.
+        /// </summary>
+        /// <param name="logger">The logger to write to.</param>
+        /// <param name="level">The log level to write with.</param>
+        public LogWriter(Logger logger, LogLevel level = LogLevel.Info) {
+            this.logger = logger;
+            this.level = level;
+        }
+
+        /// <inheritdoc />
+        public override void Write(char value) {
+            lock (this.logger)
+                this.line.Append(value);
+        }
+
+        /// <inheritdoc />
+        public override void Write(char[] buffer, int index, int count) {
+            lock (this.logger)
+                this.line.Append(buffer, index, count);
+        }
+
+        /// <inheritdoc />
+        public override void Write(string value) {
+            lock (this.logger)
+                this.line.Append(value);
+        }
+
+        /// <inheritdoc />
+        public override void WriteLine(string value) {
+            this.Write(value);
+            this.WriteLine();
+        }
+
+        /// <inheritdoc />
+        public override void WriteLine() {
+            this.Flush();
+        }
+
+        /// <inheritdoc />
+        public override void Flush() {
+            lock (this.logger) {
+                this.logger.Log(this.level, this.line);
+                this.line.Clear();
+            }
+        }
+
+    }
+}
diff --git a/Sample/Program.cs b/Sample/Program.cs
index e521c86..2620791 100644
--- a/Sample/Program.cs
+++ b/Sample/Program.cs
@@ -39,9 +39,15 @@ namespace Sample {
             logger.Log(LogLevel.Trace, "This is a message that only the file sink will receive, since its minimum level is lower.");
             logger.Log(LogLevel.Info, "The program finished.");
 
+            // we can also use a writer to write to the log
+            Console.SetError(new LogWriter(logger, LogLevel.Warn));
+            Console.Error.WriteLine("This is an error written through serr! Oh no!");
+            Console.Error.Write("This is another error, but ");
+            Console.Error.WriteLine("written in multiple parts!");
+
             // Once we're done using the logger, we can dispose it so that our FileSink instances free their files
             logger.Dispose();
         }
 
     }
-}
\ No newline at end of file
+}