126 lines
2.7 KiB
C#
126 lines
2.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Collections.Immutable;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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// A spot for immutable helpers
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namespace imm
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{
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public record class Versioned<T>
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where T: Versioned<T>
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{
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public uint Version { get; protected set; } = 0;
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public string Reason { get; protected set; } = "";
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public T Process(Func<T, T> fn, string reason = "")
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{
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var newT = fn((T)this);
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return newT with
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{
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Version = newT.Version + 1,
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Reason = reason,
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};
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}
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}
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public record class Recorded<T> : Versioned<T>
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where T : Recorded<T>
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{
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public T? Old { get; protected set; }
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public string Expression { get; protected set; } = "";
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public string MemberName { get; protected set; } = "";
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public string FilePath { get; protected set; } = "";
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public int LineNumber { get; protected set; } = -1;
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public T Record(string reason = "",
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[CallerMemberName] string memberName = "",
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[CallerFilePath] string filePath = "",
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[CallerLineNumber] int lineNumber = 0)
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{
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var orig = (T)this;
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var newT = base.Process((old) => old with
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{
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Old = orig,
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MemberName = memberName,
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FilePath = filePath,
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LineNumber = lineNumber,
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}, reason);
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return newT;
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}
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public T Process(Func<T, T> fn, string reason = "",
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[CallerMemberName] string memberName = "",
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[CallerFilePath] string filePath = "",
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[CallerLineNumber] int lineNumber = 0,
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[CallerArgumentExpression("fn")]
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string expression = default)
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{
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var orig = (T)this;
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return (T)this with
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{
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//Do the Versioned code here
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Version = orig.Version + 1,
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//Recorded
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Old = orig,
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Expression = expression,
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MemberName = memberName,
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FilePath = filePath,
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LineNumber = lineNumber,
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};
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}
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}
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public record class Timed<T> : Recorded<T>
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where T : Timed<T>
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{
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public readonly DateTime CreatedAt = DateTime.Now;
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public DateTime TouchedAt { get; set; } = DateTime.Now;
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public T Process(Func<T, T> fn, string reason = "",
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[CallerMemberName] string memberName = "",
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[CallerFilePath] string filePath = "",
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[CallerLineNumber] int lineNumber = 0,
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[CallerArgumentExpression("fn")]
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string expression = default)
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{
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var orig = (T)this;
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return (T)this with
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{
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//Versioned
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Version = orig.Version + 1,
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//Recorded
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Old = orig,
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Expression = expression,
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MemberName = memberName,
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FilePath = filePath,
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LineNumber = lineNumber,
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TouchedAt = DateTime.Now,
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};
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}
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}
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public static class Util
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{
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}
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}
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