public static Task <List <T> > GetAll <T>(
string fileName,
Func <T, bool> match)
{
using (var stream = FileUtils.GetReadStream(fileName))
{
var list = stream.ReadList <T>();
return(Task.FromResult(list.Where(t => match(t)).ToList()));
}
}
public static Task <bool> Exists <T>(
string fileName,
T itemToFind,
MatchForUpdate <T> matcher)
{
var found = false;
using (var stream = FileUtils.GetReadStream(fileName))
{
var list = stream.ReadList <T>();
for (int idx = 0; idx < list.Count && !found; idx++)
{
var item = list[idx];
bool shouldUpdate = false;
(found, shouldUpdate) = matcher(item, itemToFind);
}
}
return(Task.FromResult(found));
}
public static Task <T?> Get <T>(
string fileName,
Func <T, bool> match)
where T : struct
{
var found = false;
using (var stream = FileUtils.GetReadStream(fileName))
{
var list = stream.ReadList <T>();
for (int idx = 0; idx < list.Count && !found; idx++)
{
if (match(list[idx]))
{
return(Task.FromResult <T?>(list[idx]));
}
}
}
return(Task.FromResult <T?>(null));
}
public Task <Stream> GetReadStream(string pathKey)
=> Task.FromResult <Stream>(
FileUtils.GetReadStream(
Path.Combine(
_blobDirectory, pathKey)));
public static Task <int> CountAll <T>(
string fileName)
{
using (var stream = FileUtils.GetReadStream(fileName))
{ return(Task.FromResult(stream.ReadList <T>().Count)); }
}
