private void TryNormalizePathPartsList(
FsPathNormalizerResultMtbl mtbl,
List <SplitStrTuple> rootParts,
List <SplitStrTuple> partsList,
bool allowStartWithLinkToParent)
{
bool pathIsValid = mtbl.IsValid;
int idx = 0;
bool startsWithDirSep = false;
while (pathIsValid && idx < partsList.Count)
{
var part = partsList[idx];
if (string.IsNullOrEmpty(part.Str))
{
if (idx > 0 || rootParts.Any())
{
partsList.RemoveAt(idx);
}
else
{
idx++;
startsWithDirSep = true;
}
}
else if (part.Str == ".")
{
partsList.RemoveAt(idx);
}
else if (part.Str == "..")
{
pathIsValid = allowStartWithLinkToParent || (idx > 1) || (idx == 1 && !startsWithDirSep);
if (pathIsValid)
{
if (idx > 0)
{
partsList.RemoveRange(idx - 1, 2);
}
else
{
idx++;
}
}
}
else if (!string.IsNullOrEmpty(part.Str) && part.Str.All(
c => char.IsWhiteSpace(c) || c == '.'))
{
pathIsValid = false;
}
else
{
idx++;
}
}
mtbl.IsValid = pathIsValid;
}
private void TryNormalizePathCore(
FsPathNormalizerResultMtbl mtbl,
List <SplitStrTuple> rootParts,
List <SplitStrTuple> partsList)
{
if (mtbl.IsValid)
{
var allParts = rootParts.Concat(partsList).ToList();
if (allParts.Any())
{
int idx = 0;
bool rm = false;
while (idx < allParts.Count)
{
if (allParts[idx].Str == "..")
{
if (idx > 0)
{
allParts.RemoveRange(idx - 1, 2);
rm = true;
}
}
if (!rm)
{
idx++;
rm = false;
}
}
char dirSep = Path.DirectorySeparatorChar;
if (mtbl.IsUnixStyle == true)
{
dirSep = '/';
}
string dirSepStr = dirSep.ToString();
string[] partsArr = allParts.Select(
p => p.Str).ToArray();
mtbl.NormalizedPath = string.Join(dirSepStr, partsArr);
}
else
{
mtbl.NormalizedPath = string.Empty;
}
}
else
{
mtbl.NormalizedPath = null;
}
}
public IFsPathNormalizerResult TryNormalizePath(
string path,
bool?isUnixStyle = null,
bool allowStartWithLinkToParent = false)
{
var mtbl = new FsPathNormalizerResultMtbl
{
IsUnixStyle = isUnixStyle,
IsValid = true
};
var rootParts = new List <SplitStrTuple>();
var partsList = GetPathPartsList(path, mtbl, rootParts);
TryNormalizePathPartsList(mtbl, rootParts, partsList, allowStartWithLinkToParent);
TryNormalizePathCore(mtbl, rootParts, partsList);
var immtbl = new FsPathNormalizerResultImmtbl(mtbl);
return(immtbl);
}
private List <SplitStrTuple> GetPathPartsList(
string path,
FsPathNormalizerResultMtbl mtbl,
List <SplitStrTuple> rootParts)
{
path = path?.Trim() ?? string.Empty;
var partsList = path.SplitStr(new char[] { '/', '\\' }, true);
int partsListCount = partsList.Count;
mtbl.IsAbsUri = null;
(var first, var second, var third) = GetFirstThreeParts(
partsList, partsListCount);
if (first != null)
{
if (string.IsNullOrEmpty(first.Str)) // Starts with / or \
{
if (IsNotNullEmptyEqWith(second, first)) // Starts with // or \\
{
mtbl.IsRooted = true;
ExtractItems(rootParts, partsList, 2);
if (first.Chr == '/' && mtbl.IsUnixStyle != false) // Starts with //
{
mtbl.IsUnixStyle = true;
}
else if (first.Chr == '\\' && mtbl.IsUnixStyle != true) // Starts with \\
{
mtbl.IsUnixStyle = false;
}
if (IsNotNullEmptyEqWith(third, second)) // Starts with /// or \\\
{
ExtractItems(rootParts, partsList, 1);
}
}
else if (first.Chr == '/' && mtbl.IsUnixStyle != false) // Starts with /
{
if (second.Str.Any(c => c != '.')) // Starts with smth like /asdf
{
mtbl.IsRooted = true;
mtbl.IsUnixStyle = true;
ExtractItems(rootParts, partsList, 2);
}
else if (second.Str != ".")
{
mtbl.IsValid = false;
}
}
}
else if (IsUriSchemeLike(first.Str)) // Starts with smth like asdf: or C: or c:
{
if (mtbl.IsUnixStyle != true && IsWinDriveLetter(first.Str)) // Starts with smth like C: or c:
{
mtbl.IsUnixStyle = false;
mtbl.IsRooted = true;
ExtractItems(rootParts, partsList, 1);
}
else if (first.Chr == '/') // Starts with smth like asdf:/
{
ExtractItems(rootParts, partsList, 1);
if (IsNotNullEmptyEqWith(second, first)) // Starts with smth like asdf://
{
mtbl.IsAbsUri = true;
ExtractItems(rootParts, partsList, 1);
if (IsNotNullEmptyEqWith(third, second)) // Starts with smth like asdf:///
{
ExtractItems(rootParts, partsList, 1);
}
}
}
}
}
return(partsList);
}
