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Improve filename template

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This commit is contained in:
Michael Bucari-Tovo 2022-06-18 13:04:57 -06:00
parent a3844a3535
commit ae6c2afb30
1 changed files with 54 additions and 13 deletions
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65
Source/FileManager/FileNamingTemplate.cs
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@ -1,6 +1,7 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Dinah.Core;
namespace FileManager
@ -22,21 +23,65 @@ namespace FileManager
// using .Add() instead of "[key] = value" will make unintended overwriting throw exception
=> ParameterReplacements.Add(key, value);
/// <summary>If set, truncate each parameter replacement to this many characters. Default 50</summary>
public int? ParameterMaxSize { get; set; } = null;
/// <summary>Optional step 2: Replace all illegal characters with this. Default=<see cref="string.Empty"/></summary>
public string IllegalCharacterReplacements { get; set; }
/// <summary>Generate a valid path for this file or directory</summary>
public LongPath GetFilePath(bool returnFirstExisting = false)
{
var filename = Template;
int lastSlash = Template.LastIndexOf('\\');
foreach (var r in ParameterReplacements)
filename = filename.Replace($"<{formatKey(r.Key)}>", formatValue(r.Value));
var directoryName = lastSlash >= 0 ? Template[..(lastSlash + 1)] : string.Empty;
var filename = lastSlash >= 0 ? Template[(lastSlash + 1)..] : Template;
return FileUtility.GetValidFilename(filename, IllegalCharacterReplacements, returnFirstExisting);
List<StringBuilder> filenameParts = new();
var paramReplacements = ParameterReplacements.ToDictionary(r => $"<{formatKey(r.Key)}>", r => formatValue(r.Value));
//Build the filename in parts, replacing replacement parameters with
//their values, and storing the parts in a list.
while(!string.IsNullOrEmpty(filename))
{
int openIndex = filename.IndexOf('<');
int closeIndex = filename.IndexOf('>');
if (openIndex == 0 && closeIndex > 0)
{
var key = filename[..(closeIndex + 1)];
if (paramReplacements.ContainsKey(key))
filenameParts.Add(new StringBuilder(paramReplacements[key]));
else
filenameParts.Add(new StringBuilder(key));
filename = filename[(closeIndex + 1)..];
}
else if (openIndex > 0 && closeIndex > openIndex)
{
var other = filename[..openIndex];
filenameParts.Add(new StringBuilder(other));
filename = filename[openIndex..];
}
else
{
filenameParts.Add(new StringBuilder(filename));
filename = string.Empty;
}
}
//Remove 1 character from the end of the longest filename part until
//the total filename is less than max filename length
while(filenameParts.Sum(p => p.Length) > LongPath.MaxFilenameLength)
{
int maxLength = filenameParts.Max(p => p.Length);
var maxEntry = filenameParts.First(p => p.Length == maxLength);
maxEntry.Remove(maxLength - 1, 1);
}
filename = string.Join("", filenameParts);
return FileUtility.GetValidFilename(directoryName + filename, IllegalCharacterReplacements, returnFirstExisting);
}
private static string formatKey(string key)
@ -51,14 +96,10 @@ namespace FileManager
// Other illegal characters will be taken care of later. Must take care of slashes now so params can't introduce new folders.
// Esp important for file templates.
var val = value
return value
.ToString()
.Replace($"{System.IO.Path.DirectorySeparatorChar}", IllegalCharacterReplacements)
.Replace($"{System.IO.Path.AltDirectorySeparatorChar}", IllegalCharacterReplacements);
return
ParameterMaxSize.HasValue && ParameterMaxSize.Value > 0
? val.Truncate(ParameterMaxSize.Value)
: val;
}
}
}