Implemented prefix settings, saving & loading of settings

Also fixed some bugs:
- Presenter now has default values for its settings in case they don't load properly
- UnitDatabase ensures its units, prefixes and dimensions have all of the names
you give it

1 files changed, 17 insertions, 0 deletions

diff --git a/src/main/java/sevenUnits/utils/NameSymbol.java b/src/main/java/sevenUnits/utils/NameSymbol.java
index 955f980..7ef2967 100644
--- a/src/main/java/sevenUnits/utils/NameSymbol.java
+++ b/src/main/java/sevenUnits/utils/NameSymbol.java
@@ -288,4 +288,21 @@ public final class NameSymbol {
 		else
 			return this.primaryName.orElseGet(this.symbol::orElseThrow);
 	}
+	
+	/**
+	 * Creates and returns a copy of this {@code NameSymbol} with the provided
+	 * extra name. If this {@code NameSymbol} has a primary name, the provided
+	 * name will become an other name, otherwise it will become the primary name.
+	 *
+	 * @since 2022-04-19
+	 */
+	public final NameSymbol withExtraName(String name) {
+		if (this.primaryName.isPresent()) {
+			final var otherNames = new HashSet<>(this.otherNames);
+			otherNames.add(name);
+			return NameSymbol.ofNullable(this.primaryName.orElse(null),
+					this.symbol.orElse(null), otherNames);
+		} else
+			return NameSymbol.ofNullable(name, this.symbol.orElse(null));
+	}
 }
\ No newline at end of file