Adding an optional system for CSV fields

app/src/main/java/net/pokeranalytics/android/util/csv/CSVDescriptor.kt

@@ -130,14 +130,14 @@ abstract class CSVDescriptor(var source: DataSource, vararg elements: CSVField)
 		this.fields.forEach { field ->
 
 			val index = headers.indexOf(field.header)
-			this.fieldMapping[field] = index
-
 			if (index >= 0) {
+				this.fieldMapping[field] = index
 				count++
 			}
 		}
+		val mandatoryfields = this.fields.filter { it.optional == false }
 		Timber.d("source= ${this.source.name} > total fields = ${this.fields.size}, identified = $count")
-		return count == this.fields.size
+		return count >= mandatoryfields.size
 	}
 
 }

app/src/main/java/net/pokeranalytics/android/util/csv/CSVField.kt

@@ -89,4 +89,8 @@ interface TypedCSVField<T> : CSVField {
 
 interface CSVField {
 	val header: String
+	val optional: Boolean
+		get() {
+			return false
+		}
 }

app/src/main/java/net/pokeranalytics/android/util/csv/ProductCSVDescriptors.kt

@@ -37,7 +37,7 @@ class ProductCSVDescriptors {
 			SessionField.Game("game"),
 			SessionField.Bankroll("currency"), // same as currency code
 			SessionField.Location("type"),
-//			SessionField.Comment("sessionnote"),
+			SessionField.Comment("comment", true),
 			SessionField.Tips("expensesfromstack"),
 			SessionField.SmallBlind("smallblind"),
 			SessionField.BigBlind("bigblind"),

app/src/main/java/net/pokeranalytics/android/util/csv/SessionField.kt

@@ -114,7 +114,7 @@ sealed class SessionField {
 	data class LocationType(override var header: String) : CSVField
 	data class Bankroll(override var header: String) : CSVField
 	data class LimitType(override var header: String) : CSVField
-	data class Comment(override var header: String) : CSVField
+	data class Comment(override var header: String, override val optional: Boolean = false) : CSVField
 	data class SessionType(override var header: String) : CSVField
 	data class TableSize(override var header: String) : CSVField
 	data class CurrencyCode(override var header: String) : CSVField