1 files changed, 86 insertions, 2 deletions

diff --git a/src/main/java/sevenUnitsGUI/Presenter.java b/src/main/java/sevenUnitsGUI/Presenter.java
index 4373049..07671e4 100644
--- a/src/main/java/sevenUnitsGUI/Presenter.java
+++ b/src/main/java/sevenUnitsGUI/Presenter.java
@@ -16,12 +16,21 @@
  */
 package sevenUnitsGUI;
 
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Scanner;
 import java.util.function.Function;
 import java.util.function.Predicate;
+import java.util.stream.Collectors;
 
+import sevenUnits.ProgramInfo;
+import sevenUnits.unit.BaseDimension;
+import sevenUnits.unit.Unit;
 import sevenUnits.unit.UnitDatabase;
 import sevenUnits.unit.UnitPrefix;
+import sevenUnits.utils.ObjectProduct;
 import sevenUnits.utils.UncertainDouble;
 
 /**
@@ -32,6 +41,62 @@ import sevenUnits.utils.UncertainDouble;
  */
 public final class Presenter {
 	/**
+	 * @return text in About file
+	 * @since 2022-02-19
+	 */
+	static final String getAboutText() {
+		return Presenter.getLinesFromResource("/about.txt").stream()
+				.map(Presenter::withoutComments).collect(Collectors.joining("\n"))
+				.replaceAll("\\[VERSION\\]", ProgramInfo.VERSION);
+	}
+	
+	/**
+	 * Gets the text of a resource file as a set of strings (each one is one line
+	 * of the text).
+	 *
+	 * @param filename filename to get resource from
+	 * @return contents of file
+	 * @since 2021-03-27
+	 */
+	private static final List<String> getLinesFromResource(String filename) {
+		final List<String> lines = new ArrayList<>();
+		
+		try (InputStream stream = inputStream(filename);
+				Scanner scanner = new Scanner(stream)) {
+			while (scanner.hasNextLine()) {
+				lines.add(scanner.nextLine());
+			}
+		} catch (final IOException e) {
+			throw new AssertionError(
+					"Error occurred while loading file " + filename, e);
+		}
+		
+		return lines;
+	}
+	
+	/**
+	 * Gets an input stream for a resource file.
+	 *
+	 * @param filepath file to use as resource
+	 * @return obtained Path
+	 * @since 2021-03-27
+	 */
+	private static final InputStream inputStream(String filepath) {
+		return Presenter.class.getResourceAsStream(filepath);
+	}
+	
+	/**
+	 * @return {@code line} with any comments removed.
+	 * @since 2021-03-13
+	 */
+	private static final String withoutComments(String line) {
+		final int index = line.indexOf('#');
+		return index == -1 ? line : line.substring(index);
+	}
+	
+	// ====== SETTINGS ======
+	
+	/**
 	 * The view that this presenter communicates with
 	 */
 	private final View view;
@@ -41,8 +106,6 @@ public final class Presenter {
 	 */
 	private final UnitDatabase database;
 	
-	// ====== SETTINGS ======
-	
 	/**
 	 * The rule used for parsing input numbers. Any number-string inputted into
 	 * this program will be parsed using this method.
@@ -136,6 +199,8 @@ public final class Presenter {
 	 */
 	public void loadSettings() {}
 	
+	void prefixSelected() {}
+	
 	/**
 	 * Gets user settings from the view then saves them to the user's settings
 	 * file.
@@ -143,4 +208,23 @@ public final class Presenter {
 	 * @since 2021-12-15
 	 */
 	public void saveSettings() {}
+	
+	/**
+	 * Returns true if and only if the unit represented by {@code unitName} has
+	 * the dimension represented by {@code dimensionName}.
+	 * 
+	 * @param unitName      name of unit to test
+	 * @param dimensionName name of dimension to test
+	 * @return whether unit has dimenision
+	 * @since 2019-04-13
+	 * @since v0.2.0
+	 */
+	boolean unitMatchesDimension(String unitName, String dimensionName) {
+		final Unit unit = this.database.getUnit(unitName);
+		final ObjectProduct<BaseDimension> dimension = this.database
+				.getDimension(dimensionName);
+		return unit.getDimension().equals(dimension);
+	}
+	
+	void unitNameSelected() {}
 }