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Res1DReader.cs
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Res1DReader.cs
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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text.RegularExpressions;
using DHI.Mike1D.Generic;
using DHI.Mike1D.ResultDataAccess;
using DHI.Services.TimeSeries;
namespace DHI.Res1DReader
{
/// <summary>
/// Class for extracting and resampling multiple res1D-file time series.
/// Resamples all results if samplingPeriodMinutes > 0 in constructor.
/// Uses first loaded res1d file to set start time.
/// </summary>
public class Res1DReader
{
public const string DefaultRes1DFileKey = "res1d"; // Used when loading a single res1d
/// <summary>
/// The sampling reference sets the target resampling for all other res1d files.
/// </summary>
public string Res1DFileKeySamplingReference { get; }
public TimeSpan SamplingPeriod { get; }
public DateTime TargetStartTime { get; }
public IList<DateTime> DateTimes { get; }
protected bool DoResample { get; }
private readonly Dictionary<string, ResultData> _res1DData = new Dictionary<string, ResultData>();
private readonly Dictionary<string, DateTime[]> _res1DTimes = new Dictionary<string, DateTime[]>();
public Res1DReader(string res1DFile, int samplingPeriodMinutes = 0)
: this(new Dictionary<string, string> {{DefaultRes1DFileKey, res1DFile}}, samplingPeriodMinutes) { }
/// <summary>
/// Load multiple res1d files and set first res1d-file as sampling reference.
/// </summary>
/// <param name="res1DFiles"></param>
/// <param name="samplingPeriodMinutes"></param>
public Res1DReader(Dictionary<string, string> res1DFiles, int samplingPeriodMinutes = 0)
{
foreach (var res1DFile in res1DFiles)
{
_res1DData.Add(res1DFile.Key, LoadRes1DResultData(res1DFile.Value));
_res1DTimes.Add(res1DFile.Key, _res1DData[res1DFile.Key].TimesList.ToArray()); // Save time stamps
}
Res1DFileKeySamplingReference = res1DFiles.Keys.First();
DateTimes = GetDateTimes();
SamplingPeriod = new TimeSpan(0, samplingPeriodMinutes, 0);
DoResample = SamplingPeriod.TotalMinutes > 0;
if (DoResample)
{
DateTimes = GetDateTimesResample(samplingPeriodMinutes, Res1DFileKeySamplingReference);
TargetStartTime = DateTimes.First();
}
}
public Res1DReader(IEnumerable<string> res1DFileKey, IEnumerable<string> res1DFilePath, int samplingPeriodMinutes = 0)
: this(res1DFileKey.Zip(res1DFilePath, (k, v) => new {k, v}).ToDictionary(x => x.k, x => x.v), samplingPeriodMinutes) { }
private static ResultData LoadRes1DResultData(string res1DFilePath)
{
IResultData resultData = new ResultData();
resultData.Connection = Connection.Create(res1DFilePath);
var resultDiagnostics = new Diagnostics(res1DFilePath);
resultData.Load(resultDiagnostics);
if (resultDiagnostics.ErrorCountRecursive > 0)
throw new Exception("File could not be loaded: " + res1DFilePath);
return (ResultData) resultData;
}
public Res1DData Get(Res1DQuery query) => Get(new[] {query});
public Res1DData Get(params Res1DQuery[] queries) => Get(queries.ToList());
public Res1DData Get(IList<Res1DQuery> queries)
{
var results = new Res1DData();
foreach (var query in queries)
{
if (DoResample)
{
foreach (var data in query.GetData(this))
results.Add(query + data.Key, Resample(query.Res1DFileKey, data.Value));
}
else
results.Add(query.GetData(this));
}
return results;
}
public float[] GetNode(string id, string quantity = "WaterLevel", string res1DFileKey = DefaultRes1DFileKey)
{
IRes1DNode node = _res1DData[res1DFileKey].Nodes.FirstOrDefault(n => n.Id.Equals(id))
?? throw new Exception("Could not find node: " + id);
IDataItem dataItem = GetDataItem(node, id, quantity, res1DFileKey);
return dataItem.CreateTimeSeriesData(0);
}
public float[] GetReach(string id, string quantity = "Discharge", bool? atFromNode = null, string res1DFileKey = DefaultRes1DFileKey)
{
IRes1DReach reach = _res1DData[res1DFileKey].Reaches.FirstOrDefault(n => n.Name.Equals(id))
?? _res1DData[res1DFileKey].Reaches.FirstOrDefault(n => n.Name.Equals("Weir:" + id))
?? _res1DData[res1DFileKey].Reaches.FirstOrDefault(n => n.Name.Equals("Orifice:" + id))
?? throw new Exception("Could not find reach: " + id);
IDataItem dataItem = GetDataItem(reach, id, quantity, res1DFileKey);
return GetReach(quantity, atFromNode, dataItem) ?? throw new Exception($"atFromNode must be defined for reach {id} {quantity}");
}
private static float[] GetReach(string quantity, bool? atFromNode, IDataItem dataItem)
{
if (atFromNode.HasValue)
{
var elementIndex = (bool) atFromNode ? 0 : dataItem.NumberOfElements - 1;
return dataItem.CreateTimeSeriesData(elementIndex);
}
else if (quantity.Contains("Volume")) // Sum all HD points ToDo: handle depending on quantity
{
float[] sum = dataItem.CreateTimeSeriesData(0);
for (var i = 1; i < dataItem.NumberOfElements; i++)
sum = Res1DData.Sum(sum, dataItem.CreateTimeSeriesData(i));
return sum;
}
return null;
}
public float[] GetCatchment(string id, string quantity = "TotalRunOff", string res1DFileKey = DefaultRes1DFileKey)
{
//if (quantity.Equals("CatchmentDischarge"))
// id += "CatchmentDischarge";
IRes1DCatchment catchment = _res1DData[res1DFileKey].Catchments.FirstOrDefault(n => n.Id.Equals(id))
?? throw new Exception("Could not find catchment: " + id);
IDataItem dataItem = GetDataItem(catchment, id, quantity, res1DFileKey);
return dataItem.CreateTimeSeriesData(0);
}
public IDataItem GetDataItem(IRes1DDataSet dataSet, string id, string quantity, string res1DFileKey)
{
return dataSet.DataItems.FirstOrDefault(di => di.Quantity.Equals(ParseQuantity(quantity))) // Assume only one dataItem per quantity
?? throw new Exception("No data for chosen quantity: " + quantity + " for " + id);
}
private static Quantity ParseQuantity(string quantity)
{
try
{
quantity = Regex.Replace(quantity, " ", "");
var q = (PredefinedQuantity) Enum.Parse(typeof(PredefinedQuantity), quantity);
return Quantity.Create(q);
}
catch
{
throw new Exception("Invalid or unsupported quantity: " + quantity);
}
}
public void GetStartEndDateTimes(out DateTime startTime, out DateTime endTime)
{
startTime = _res1DData[DefaultRes1DFileKey].StartTime;
endTime = _res1DData[DefaultRes1DFileKey].EndTime;
}
public DateTime[] GetDateTimes(string res1DFileKey = DefaultRes1DFileKey)
{
return _res1DData[res1DFileKey].TimesList.ToArray();
}
public DateTime[] GetDateTimesResample(int samplingPeriodMinutes, string res1DFileKey = DefaultRes1DFileKey)
{
DateTime from = _res1DData[res1DFileKey].StartTime;
DateTime to = _res1DData[res1DFileKey].EndTime;
var timeStep = new TimeSpan(0, samplingPeriodMinutes, 0);
return DateTimeRange(from, to, timeStep).ToArray();
}
public static IEnumerable<DateTime> DateTimeRange(DateTime from, DateTime to, TimeSpan timeStep)
{
for (DateTime t = from; t <= to; t = t.Add(timeStep))
yield return t;
}
/// <summary>
/// Resamples time series data (time, values)
/// </summary>
/// <param name="time"></param>
/// <param name="values"></param>
/// <param name="targetStartTime"></param>
/// <param name="targetSamplePeriod"></param>
/// <returns></returns>
public static float[] Resample(DateTime[] time, float[] values, DateTime targetStartTime, TimeSpan targetSamplePeriod)
{
var tsData = CreateTimeSeriesData(time, values);
// Insert starting time if offset from target resampling
if (time.First() > targetStartTime)
tsData.Insert(targetStartTime, values.First());
else if (time.First() < targetStartTime)
{
var startValue = tsData.GetInterpolated(targetStartTime, TimeSeriesDataType.Instantaneous).Value;
tsData.Insert(targetStartTime, startValue);
}
return GetValues(tsData.Resample(targetSamplePeriod));
}
public float[] Resample(string res1DFileKey, float[] values)
{
return Resample(_res1DTimes[res1DFileKey], values, TargetStartTime, SamplingPeriod);
}
private static ITimeSeriesData<double> CreateTimeSeriesData(DateTime[] time, float[] values)
{
ITimeSeriesData<double> data = new TimeSeriesData<double>();
for (var i = 0; i < time.Length; i++)
{
data.DateTimes.Add(time[i]);
data.Values.Add(values[i]);
}
return data;
}
private static float[] GetValues(ITimeSeriesData<double> tsData)
{
return tsData.Values.Select(v => (float) (v ?? 0)).ToArray();
}
public string[] GetDateTimesResampleString(int minutes, string res1DFileKey = DefaultRes1DFileKey)
{
var tr = GetDateTimesResample(minutes, res1DFileKey);
return ToDateTimesString(tr);
}
public static string[] ToDateTimesString(DateTime[] time)
{
var english = CultureInfo.GetCultureInfo("en-GB");
var dt = new string[time.Length];
for (int t = 0; t < time.Length; t++)
dt[t] = time[t].ToString(english);
return dt;
}
public static IEnumerable<double> ToDouble(IEnumerable<float> values)
{
return values.Select(value => (double) value);
}
}
}