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using System.Collections.Generic;
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using System.Linq;
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namespace Best.HTTP.Shared.Logger
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{
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/// <summary>
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/// Represents a logging context for categorizing and organizing log messages.
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/// </summary>
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/// <remarks>
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/// The LoggingContext class is used to provide additional context information
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/// to log messages, allowing for better categorization and organization of log output. It can be
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/// associated with specific objects or situations to enrich log entries with context-specific data.
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/// </remarks>
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public sealed class LoggingContext
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{
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/// <summary>
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/// Gets the unique hash value of this logging context.
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/// </summary>
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public string Hash { get; private set; }
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public enum LoggingContextFieldType
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{
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Long,
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Bool,
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String,
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AnotherContext
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}
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public struct LoggingContextField
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{
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public string key;
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public long longValue;
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public bool boolValue;
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public string stringValue;
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public LoggingContext loggingContextValue;
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public LoggingContextFieldType fieldType;
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public override string ToString()
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{
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object value = this.fieldType switch
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{
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LoggingContextFieldType.Bool => this.boolValue,
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LoggingContextFieldType.Long => this.longValue,
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LoggingContextFieldType.String => this.stringValue,
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_ => this.loggingContextValue
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};
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return $"[{this.key} => '{value}']";
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}
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}
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public List<LoggingContextField> fields = new List<LoggingContextField>(8);
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/// <summary>
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/// Initializes a new instance of the LoggingContext class associated with the specified object.
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/// </summary>
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/// <param name="boundto">The object to associate the context with.</param>
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public LoggingContext(object boundto)
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{
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var name = boundto.GetType().Name;
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Add("TypeName", name);
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UnityEngine.Hash128 hash = new UnityEngine.Hash128();
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hash.Append(name);
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hash.Append(boundto.GetHashCode());
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hash.Append(this.GetHashCode());
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this.Hash = hash.ToString();
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Add("Hash", this.Hash);
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}
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/// <summary>
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/// Adds a <c>long</c> value to the logging context.
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/// </summary>
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/// <param name="key">The key to associate with the value.</param>
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/// <param name="value">The <c>long</c> value to add.</param>
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public void Add(string key, long value) => Add(new LoggingContextField { fieldType = LoggingContextFieldType.Long, key = key, longValue = value });
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/// <summary>
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/// Adds a <c>bool</c> value to the logging context.
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/// </summary>
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/// <param name="key">The key to associate with the value.</param>
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/// <param name="value">The <c>bool</c> value to add.</param>
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public void Add(string key, bool value) => Add(new LoggingContextField { fieldType = LoggingContextFieldType.Bool, key = key, boolValue = value });
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/// <summary>
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/// Adds a <c>string</c> value to the logging context.
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/// </summary>
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/// <param name="key">The key to associate with the value.</param>
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/// <param name="value">The <c>string</c> value to add.</param>
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public void Add(string key, string value) => Add(new LoggingContextField { fieldType = LoggingContextFieldType.String, key = key, stringValue = value });
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/// <summary>
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/// Adds a <c>LoggingContext</c> value to the logging context.
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/// </summary>
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/// <param name="key">The key to associate with the value.</param>
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/// <param name="value">The <c>LoggingContext</c> value to add.</param>
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public void Add(string key, LoggingContext value) => Add(new LoggingContextField { fieldType = LoggingContextFieldType.AnotherContext, key = key, loggingContextValue = value });
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private void Add(LoggingContextField field)
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{
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Remove(field.key);
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this.fields.Add(field);
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}
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/// <summary>
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/// Gets the <c>string</c> field with the specified name from the logging context.
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/// </summary>
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/// <param name="fieldName">The name of the <c>string</c> field to retrieve.</param>
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/// <returns>The value of the <c>string</c> field or <c>null</c> if not found.</returns>
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public string GetStringField(string fieldName) => this.fields.FirstOrDefault(f => f.key == fieldName).stringValue;
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/// <summary>
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/// Removes a field from the logging context by its key.
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/// </summary>
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/// <param name="key">The key of the field to remove.</param>
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public void Remove(string key)
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{
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for (int i = 0; i < this.fields.Count; i++)
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{
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var field = this.fields[i];
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if (field.key.Equals(key, System.StringComparison.Ordinal))
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this.fields.RemoveAt(i--);
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}
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}
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/// <summary>
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/// Converts the logging context and its associated fields to a JSON string representation.
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/// </summary>
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/// <param name="sb">A <see cref="System.Text.StringBuilder"/> instance to which the JSON string is appended.</param>
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/// <remarks>
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/// This method serializes the logging context and its associated fields into a JSON format
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/// for structured logging purposes. The resulting JSON string represents the context and its fields, making it
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/// suitable for inclusion in log entries for better analysis and debugging.
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/// </remarks>
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public void ToJson(System.Text.StringBuilder sb)
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{
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if (this.fields == null || this.fields.Count == 0)
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{
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sb.Append("null");
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return;
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}
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sb.Append("{");
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for (int i = 0; i < this.fields.Count; ++i)
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{
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var field = this.fields[i];
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if (field.fieldType != LoggingContextFieldType.AnotherContext)
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{
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if (i > 0)
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sb.Append(", ");
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sb.AppendFormat("\"{0}\": ", field.key);
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}
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switch (field.fieldType)
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{
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case LoggingContextFieldType.Long:
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sb.Append(field.longValue);
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break;
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case LoggingContextFieldType.Bool:
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sb.Append(field.boolValue ? "true" : "false");
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break;
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case LoggingContextFieldType.String:
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sb.AppendFormat("\"{0}\"", Escape(field.stringValue));
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break;
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}
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}
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sb.Append("}");
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for (int i = 0; i < this.fields.Count; ++i)
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{
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var field = this.fields[i];
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if (field.loggingContextValue == null)
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continue;
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switch (field.fieldType)
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{
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case LoggingContextFieldType.AnotherContext:
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sb.Append(", ");
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field.loggingContextValue.ToJson(sb);
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break;
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}
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}
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}
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public static string Escape(string original)
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{
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return Best.HTTP.Shared.PlatformSupport.Text.StringBuilderPool.ReleaseAndGrab(Best.HTTP.Shared.PlatformSupport.Text.StringBuilderPool.Get(1)
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.Append(original)
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.Replace("\\", "\\\\")
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.Replace("\"", "\\\"")
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.Replace("/", "\\/")
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.Replace("\b", "\\b")
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.Replace("\f", "\\f")
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.Replace("\n", "\\n")
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.Replace("\r", "\\r")
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.Replace("\t", "\\t"));
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}
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}
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}
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