/// <summary>
/// Find first file in the specified group
/// </summary>
/// <param name="grp"></param>
/// <returns></returns>
public FileDsc FindFirstFileForTheGroup(FileGroupDsc grp)
{
if (this.Files != null)
{
return(this.EnumerateGroupFiles(grp).FirstOrDefault());
}
return(null);
}
/// <summary>
/// Find first image file in the specified group
/// </summary>
/// <param name="grp"></param>
/// <returns></returns>
public FileDsc FindFirstImageForTheGroup(FileGroupDsc grp)
{
if (this.Files != null)
{
return(this.EnumerateGroupFiles(grp).FirstOrDefault((fl) => _imgExtensions.Contains(fl.Extension)));
}
return(null);
}
public List <FileGroupDsc> RecalcGroups(double intervalM, Func <int, string> grpNameGenerator = null)
{
List <FileGroupDsc> rz = new List <FileGroupDsc>();
DateTime dt = DateTime.MinValue;
Func <int, string> namer = grpNameGenerator ?? ((n) => string.Format("Group #{0}", n));
FileGroupDsc tmp = null;
int ix = 1;
if (this.Files.Count > 0)
{
var q = from t in this.Files orderby t.FileTime select t;
foreach (var t in q)
{
if (tmp == null)
{
tmp = new FileGroupDsc()
{
GrpName = namer(ix++),
StartTime = new DateTimeRef(t.FileTime),
EndTime = new DateTimeRef(DateTime.MaxValue),
Count = 1
};
dt = t.FileTime;
t.Group = tmp;
rz.Add(tmp);
}
else
{
if (dt.AddMinutes(intervalM) < t.FileTime)
{
tmp.EndTime.Value = dt;
tmp = new FileGroupDsc()
{
GrpName = namer(ix++),
StartTime = new DateTimeRef(t.FileTime),
EndTime = new DateTimeRef(DateTime.MaxValue),
Count = 1
};
dt = t.FileTime;
t.Group = tmp;
rz.Add(tmp);
}
else
{
tmp.Count += 1;
t.Group = tmp;
dt = t.FileTime;
}
}
}
tmp.EndTime.Value = dt;
}
return(this.FileGroups = rz);
}
public FileGroupDsc CreateNextGroup(string grpName, DateTime endTime)
{
var rz = new FileGroupDsc()
{
GrpName = grpName,
StartTime = this.EndTime,
EndTime = new DateTimeRef(endTime)
};
return(rz);
}
void DoStartGroup()
{
var cfl = this.CurrentFileDsc;
if (cfl != null)
{
var cgrp = cfl.Group;
int ix = this.FileGroups.IndexOf(cgrp);
var ngrp = new FileGroupDsc()
{
GrpName = GetNextGrpName(cgrp),
StartTime = new DateTimeRef(cfl.FileTime),
EndTime = new DateTimeRef(cgrp.EndTime.Value),
IsManual = true
};
this.FileGroups.Insert(ix + 1, ngrp);
cgrp.EndTime = new DateTimeRef(cfl.FileTime.AddMilliseconds(-1));
var qg = from f in this.Files where object.ReferenceEquals(f.Group, cgrp) select f;
var cgMaxTm = cgrp.StartTime.Value; //need get more accurate endtime for the old group
int cgn = 0, ngn = 0;
foreach (var f in qg)
{
if (f.FileTime < cgrp.EndTime.Value)
{
cgn++;
if (cgMaxTm < f.FileTime)
{
cgMaxTm = f.FileTime;
}
}
else
{
ngn++;
f.Group = ngrp;
}
}
cgrp.Count = cgn;
cgrp.EndTime.Value = cgMaxTm;
ngrp.Count = ngn;
PrepareNames();
this.CurrentGroup = ngrp;
}
}
/// <summary>
/// Converts collection of DateTimes into groups ordered by time.
/// </summary>
/// <param name="times">Collection of DateTimes. May contain duplicates and may not be ordered.</param>
/// <param name="grpNameGenerator">Group name generator. If <c>null</c> then default generator is used.</param>
/// <returns></returns>
public static IEnumerable <FileGroupDsc> GenerateSequence(IEnumerable <DateTime> times, Func <int, string> grpNameGenerator = null)
{
HashSet <DateTime> dths = new HashSet <DateTime>(times);
var tml = (from t in dths orderby t select t).ToArray();
Func <int, string> namer = grpNameGenerator ?? ((x) => string.Format("Group #{0}", x));
if (tml.Length > 0)
{
if (tml.Length == 1)
{
yield return(new FileGroupDsc()
{
GrpName = namer(1),
StartTime = new DateTimeRef(tml[0]),
EndTime = new DateTimeRef(DateTime.MaxValue)
});
}
else
{
FileGroupDsc fg = new FileGroupDsc()
{
GrpName = namer(1),
StartTime = new DateTimeRef(tml[0]),
EndTime = new DateTimeRef(tml[1])
};
yield return(fg);
for (int i = 2; i < tml.Length; i++)
{
fg = fg.CreateNextGroup(namer(i), tml[i]);
yield return(fg);
}
fg = fg.CreateNextGroup(namer(tml.Length), DateTime.MaxValue);
yield return(fg);
}
}
}
IEnumerable <FileDsc> EnumerateGroupFiles(FileGroupDsc fgrp)
{
return(from f in this.Files where object.ReferenceEquals(f.Group, fgrp) select f);
}
string GetNextGrpName(FileGroupDsc grp)
{
return(grp.GrpName + ".a");
}