/// <summary>
/// Requests events from the server.
/// </summary>
private EventPacket RequestEvents(int archiveBit, TimeRange timeRange,
EventFilter filter, long filterID, bool useCache)
{
List <Event> events = filterID > 0
? clientAccessor.ScadaClient.GetEvents(archiveBit, timeRange, ref filterID)
: clientAccessor.ScadaClient.GetEvents(archiveBit, timeRange, filter, useCache, out filterID);
int eventCnt = events.Count;
EventRecord[] records = new EventRecord[eventCnt];
CnlDataFormatter formatter = CreateFormatter();
for (int i = 0; i < eventCnt; i++)
{
Event ev = events[i];
records[i] = new EventRecord
{
Id = ev.EventID.ToString(),
E = ev,
Ef = formatter.FormatEvent(ev)
};
}
return(new EventPacket
{
Records = records,
FilterID = filterID.ToString()
});
}
/// <summary>
/// Requests the current data from the server.
/// </summary>
private CurData RequestCurData(IList <int> cnlNums, long cnlListID, bool useCache)
{
int cnlCnt = cnlNums == null ? 0 : cnlNums.Count;
CurDataRecord[] records = new CurDataRecord[cnlCnt];
CurData curData = new()
{
ServerTime = TimeRecord.Create(DateTime.UtcNow, userContext.TimeZone),
Records = records,
CnlListID = "0"
};
if (cnlCnt > 0)
{
CnlData[] cnlDataArr = cnlListID > 0
? clientAccessor.ScadaClient.GetCurrentData(ref cnlListID)
: clientAccessor.ScadaClient.GetCurrentData(cnlNums.ToArray(), useCache, out cnlListID);
curData.CnlListID = cnlListID.ToString();
CnlDataFormatter formatter = CreateFormatter();
for (int i = 0; i < cnlCnt; i++)
{
int cnlNum = cnlNums[i];
CnlData cnlData = i < cnlDataArr.Length ? cnlDataArr[i] : CnlData.Empty;
records[i] = new CurDataRecord
{
D = new CurDataPoint(cnlNum, cnlData),
Df = formatter.FormatCnlData(cnlData, cnlNum, false)
};
}
}
return(curData);
}
/// <summary>
/// Requests historical data from the server.
/// </summary>
private HistData RequestHistData(int archiveBit, TimeRange timeRange, IList <int> cnlNums)
{
if (cnlNums == null)
{
cnlNums = Array.Empty <int>();
}
int cnlCnt = cnlNums.Count;
HistData.RecordList[] trends = new HistData.RecordList[cnlCnt];
HistData histData = new()
{
CnlNums = cnlNums,
Timestamps = Array.Empty <TimeRecord>(),
Trends = trends
};
if (cnlCnt > 0)
{
// request trends
TrendBundle trendBundle = clientAccessor.ScadaClient.GetTrends(
archiveBit, timeRange, cnlNums.ToArray());
// copy timestamps
int pointCount = trendBundle.Timestamps.Count;
TimeRecord[] timestamps = new TimeRecord[pointCount];
histData.Timestamps = timestamps;
for (int i = 0; i < pointCount; i++)
{
timestamps[i] = TimeRecord.Create(trendBundle.Timestamps[i], userContext.TimeZone);
}
// copy channel data
CnlDataFormatter formatter = CreateFormatter();
for (int cnlIdx = 0; cnlIdx < cnlCnt; cnlIdx++)
{
int cnlNum = cnlNums[cnlIdx];
Cnl cnl = webContext.ConfigDatabase.CnlTable.GetItem(cnlNum);
HistData.RecordList records = trends[cnlIdx] = new(pointCount);
TrendBundle.CnlDataList cnlDataList = trendBundle.Trends[cnlIdx];
for (int ptIdx = 0; ptIdx < pointCount; ptIdx++)
{
CnlData cnlData = cnlDataList[ptIdx];
records.Add(new HistDataRecord
{
D = cnlData,
Df = formatter.FormatCnlData(cnlData, cnl, false)
});
}
}
}
return(histData);
}
private TrendBundle trendBundle; // the chart data of many channels
/// <summary>
/// Initializes a new instance of the class.
/// </summary>
public ChartDataBuilder(ConfigDataset configDataset, ScadaClient scadaClient, ChartDataBuilderOptions options)
{
this.configDataset = configDataset ?? throw new ArgumentNullException(nameof(configDataset));
this.scadaClient = scadaClient ?? throw new ArgumentNullException(nameof(scadaClient));
this.options = options ?? throw new ArgumentNullException(nameof(options));
options.Validate();
formatter = new CnlDataFormatter(configDataset);
cnls = Array.Empty <Cnl>();
singleTrend = null;
trendBundle = null;
}
