Better display of multiple minecraft version

src/main/java/fr/pandacube/java/util/MinecraftVersion.java

@@ -1,8 +1,14 @@
 package fr.pandacube.java.util;
 
 import java.util.ArrayList;
-import java.util.HashSet;
+import java.util.Arrays;
+import java.util.EnumSet;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import com.google.common.collect.ImmutableList;
 
 public enum MinecraftVersion {
 	v1_7_2_to_1_7_5(4, "1.7.2-1.7.5"),
@@ -11,32 +17,75 @@ public enum MinecraftVersion {
 	v1_9(107, "1.9"),
 	v1_9_1(108, "1.9.1"),
 	v1_9_2(109, "1.9.2"),
-	v1_9_3_to_1_9_4(110, "1.9.3-1.9.4"),
+	v1_9_3_to_1_9_4(110, "1.9.3", "1.9.4"),
 	v1_10(210, "1.10.x"),
 	v1_11(315, "1.11"),
-	v1_11_1_to_1_11_2(316, "1.11.1-1.11.2"),
+	v1_11_1_to_1_11_2(316, "1.11.1", "1.11.2"),
 	v1_12(335, "1.12"),
 	v1_12_1(338, "1.12.1"),
 	v1_12_2(340, "1.12.2"),
 	v1_13(393, "1.13"),
 	v1_13_1(401, "1.13.1"),
 	v1_13_2(404, "1.13.2");
+	// IMPORTANT: don't forget to update the versionMergeDisplay value when adding a new version;
+	
+	private static Map<EnumSet<MinecraftVersion>, List<String>> versionMergeDisplay;
+	
+	static {
+		versionMergeDisplay = new HashMap<>();
+		
+		versionMergeDisplay.put(EnumSet.of(v1_7_2_to_1_7_5, v1_7_6_to_1_7_10),
+				ImmutableList.of("1.7.2-1.7.10"));
+		
+		versionMergeDisplay.put(EnumSet.of(v1_9, v1_9_1, v1_9_2, v1_9_3_to_1_9_4),
+				ImmutableList.of("1.9.x"));
+		versionMergeDisplay.put(EnumSet.of(v1_9, v1_9_1, v1_9_2),
+				ImmutableList.of("1.9-1.9.2"));
+		versionMergeDisplay.put(EnumSet.of(v1_9, v1_9_1),
+				ImmutableList.of("1.9", "1.9.1"));
+		versionMergeDisplay.put(EnumSet.of(v1_9_1, v1_9_2, v1_9_3_to_1_9_4),
+				ImmutableList.of("1.9.1-1.9.4"));
+		versionMergeDisplay.put(EnumSet.of(v1_9_1, v1_9_2),
+				ImmutableList.of("1.9.1", "1.9.2"));
+		versionMergeDisplay.put(EnumSet.of(v1_9_2, v1_9_3_to_1_9_4),
+				ImmutableList.of("1.9.2-1.9.4"));
+
+		versionMergeDisplay.put(EnumSet.of(v1_11, v1_11_1_to_1_11_2),
+				ImmutableList.of("1.11.x"));
+
+		versionMergeDisplay.put(EnumSet.of(v1_12, v1_12_1, v1_12_2),
+				ImmutableList.of("1.12.x"));
+		versionMergeDisplay.put(EnumSet.of(v1_12, v1_12_1),
+				ImmutableList.of("1.12", "1.12.1"));
+		versionMergeDisplay.put(EnumSet.of(v1_12_1, v1_12_2),
+				ImmutableList.of("1.12.1", "1.12.2"));
+
+		versionMergeDisplay.put(EnumSet.of(v1_13, v1_13_1, v1_13_2),
+				ImmutableList.of("1.13.x"));
+		versionMergeDisplay.put(EnumSet.of(v1_13, v1_13_1),
+				ImmutableList.of("1.13", "1.13.1"));
+		versionMergeDisplay.put(EnumSet.of(v1_13_1, v1_13_2),
+				ImmutableList.of("1.13.1", "1.13.2"));
+		
+		
+	}
+	
 
 	public final int versionNumber;
-	public final String versionDisplay;
+	public final List<String> versionDisplay;
 
-	private MinecraftVersion(int v, String d) {
+	private MinecraftVersion(int v, String... d) {
 		versionNumber = v;
-		versionDisplay = d;
+		versionDisplay = Arrays.asList(d);
 	}
 
 	@Override
 	public String toString() {
-		return versionDisplay;
+		return StringUtil.joinGrammatically(", ", " et ", versionDisplay);
 	}
 
 	public static MinecraftVersion getVersion(int v) {
-		for (MinecraftVersion mcV : MinecraftVersion.values())
+		for (MinecraftVersion mcV : values())
 			if (mcV.versionNumber == v) return mcV;
 
 		return null;
@@ -45,64 +94,37 @@ public enum MinecraftVersion {
 
 
 	public static String displayOptimizedListOfVersions(List<MinecraftVersion> versions) {
-		return String.join(", ", getVersionsDisplayList(versions));
+		return StringUtil.joinGrammatically(", ", " et ", getVersionsDisplayList(versions));
 	}
 	
 	
-	public static final List<String> getVersionsDisplayList(List<MinecraftVersion> versions) {
+	public static final List<String> getVersionsDisplayList(List<MinecraftVersion> vList) {
-		versions = new ArrayList<>(new HashSet<>(versions));
+		Set<MinecraftVersion> vSet = EnumSet.copyOf(vList);
-		versions.sort((a, b) -> Integer.compare(a.versionNumber, b.versionNumber));
 		
 		List<String> ret = new ArrayList<>();
 		
-		// grouping 1.7 versions
+		for (int i = 0; i < values().length; i++) {
-		if (versions.contains(v1_7_2_to_1_7_5) && versions.contains(v1_7_6_to_1_7_10)) {
+			if (!vSet.contains(values()[i]))
-			versions.remove(v1_7_2_to_1_7_5);
+				continue;
-			versions.remove(v1_7_6_to_1_7_10);
+			
-			ret.add("1.7");
+			EnumSet<MinecraftVersion> vSubSet = EnumSet.of(values()[i]);
+			while (i + 1 < values().length && vSet.contains(values()[i + 1])) {
+				i++;
+				vSubSet.add(values()[i]);
+				if (!versionMergeDisplay.containsKey(vSubSet)) {
+					vSubSet.remove(values()[i]);
+					i--;
+					break;
+				}
+			}
+			
+			if (vSubSet.size() == 1) {
+				ret.addAll(values()[i].versionDisplay);
+			}
+			else {
+				ret.addAll(versionMergeDisplay.get(vSubSet));
+			}
 		}
-		// grouping 1.8 versions
-		if (versions.contains(v1_8)) {
-			versions.remove(v1_8);
-			ret.add("1.8");
-		}
-		// grouping 1.9 versions
-		if (versions.contains(v1_9) && versions.contains(v1_9_1) && versions.contains(v1_9_2)
-				&& versions.contains(v1_9_3_to_1_9_4)) {
-			versions.remove(v1_9);
-			versions.remove(v1_9_1);
-			versions.remove(v1_9_2);
-			versions.remove(v1_9_3_to_1_9_4);
-			ret.add("1.9");
-		}
-		// grouping 1.10 versions
-		if (versions.contains(v1_10)) {
-			versions.remove(v1_10);
-			ret.add("1.10");
-		}
-		// grouping 1.11 versions
-		if (versions.contains(v1_11) && versions.contains(v1_11_1_to_1_11_2)) {
-			versions.remove(v1_11);
-			versions.remove(v1_11_1_to_1_11_2);
-			ret.add("1.11");
-		}
-		// grouping 1.12 versions
-		if (versions.contains(v1_12) && versions.contains(v1_12_1) && versions.contains(v1_12_2)) {
-			versions.remove(v1_12);
-			versions.remove(v1_12_1);
-			versions.remove(v1_12_2);
-			ret.add("1.12");
-		}
-		// grouping 1.13 versions
-		if (versions.contains(v1_13) && versions.contains(v1_13_1) && versions.contains(v1_13_2)) {
-			versions.remove(v1_13);
-			versions.remove(v1_13_1);
-			versions.remove(v1_13_2);
-			ret.add("1.13");
-		}
-		
-		for (MinecraftVersion v : versions)
-			ret.add(v.versionDisplay);
 		
 		return ret;