LeafGasComparison extract single curve for optimization

Core/Parsers/LeafGasComparisonParser.cs

@@ -16,7 +16,7 @@ namespace LeafWeb.Core.Parsers
 		{
 		}
 
-		public LeafGasComparison[] Parse()
+		public LeafGasComparison[] Parse(string matchCurveId = null)
 		{
 			var fittingTitles = GetNextCsvRowValues();
 			if (fittingTitles == null)
@@ -25,18 +25,49 @@ namespace LeafWeb.Core.Parsers
 			if (fitUnits == null)
 				throw new ParseException($"Could not read data units row on line number {CsvReader.Row}");
 
-			return ParseLeafGasComparisonSet(fittingTitles).ToArray();
+			return ParseLeafGasComparisonSet(fittingTitles, matchCurveId).ToArray();
 		}
 
-		private IEnumerable<LeafGasComparison> ParseLeafGasComparisonSet(string[] fittingTitles)
+		public string[] ExtractCurveIds()
 		{
-			var matcher = new ParseInfoPropertyMatcher<LeafGasComparisonPhotosyntheticInfo>();
+			var fittingTitles = GetNextCsvRowValues();
+			if (fittingTitles == null)
+				throw new ParseException($"Could not read data header row on line number {CsvReader.Row}");
+			var fitUnits = GetNextCsvRowValues();
+			if (fitUnits == null)
+				throw new ParseException($"Could not read data units row on line number {CsvReader.Row}");
+
+			return ExtractSectionCurveIds(fittingTitles).Distinct().ToArray();
+		}
+
+		private IEnumerable<string> ExtractSectionCurveIds(string[] fittingTitles)
+		{
+			string[] values;
+			do
+			{
+				values = GetNextCsvRowValues();
+				if (values == null)
+					yield break;
+
+				var fittingInfo = ParsedObjectFactory<LeafGasComparisonFittingInfo>
+					.Create(fittingTitles, new[] {values});
+				yield return fittingInfo[0].CurveID;
+
+				while (!CsvReader.IsRecordEmpty())
+					values = GetNextCsvRowValues();
+			} while (values != null);
+		}
+
+		private IEnumerable<LeafGasComparison> ParseLeafGasComparisonSet(string[] fittingTitles, string matchCurveId = null)
+		{
+			var matcher = new ParseInfoPropertyMatcherWithCache<LeafGasComparisonPhotosyntheticInfo>();
 			var endOfFile = false;
 			while (!endOfFile)
 			{
 				// First Section
 				var fittingValues = new List<string[]>();
 				string[] photosyntheticTitles;
+				string curveId = null;
 				while (true)
 				{
 					var values = GetNextCsvRowValues();
@@ -50,6 +81,15 @@ namespace LeafWeb.Core.Parsers
 						break;
 					}
 					fittingValues.Add(values);
+
+					// extract the curveId
+					if (!string.IsNullOrEmpty(matchCurveId) && curveId == null)
+					{
+						var testFittingInfo = 
+							ParsedObjectFactory<LeafGasComparisonFittingInfo>
+								.Create(fittingTitles, fittingValues.ToArray());
+						curveId = testFittingInfo[0].CurveID;
+					}
 				}
 
 				var photosyntheticValues = new List<string[]>();
@@ -66,9 +106,14 @@ namespace LeafWeb.Core.Parsers
 					photosyntheticValues.Add(values);
 				}
 
+				// don't parse the values if it's not the curve we're wanting
+				if (!string.IsNullOrEmpty(matchCurveId) && curveId != matchCurveId)
+					continue;
+
 				var fittingInfo =
 					ParsedObjectFactory<LeafGasComparisonFittingInfo>
 						.Create(fittingTitles, fittingValues.ToArray());
+
 				var photosyntheticInfo =
 					ParsedObjectFactory<LeafGasComparisonPhotosyntheticInfo>
 						.Create(photosyntheticTitles, photosyntheticValues.ToArray());