Fix commenting issues

src/main/java/app/model/languages/Java.java

@@ -7,6 +7,7 @@ import java.util.Map;
 import java.util.Map.Entry;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import app.model.ProgrammingLanguage;
 
@@ -106,8 +107,21 @@ public class Java implements ProgrammingLanguage {
   }
 
   public boolean isCommentedSelection(String selection) {
-    // TODO: Fix
+    var lines = selection.split("\n");
-    return selection.startsWith("/*");
+
+    boolean midPartStartsWithStar =
+      lines.length < 2 ||
+      Arrays.asList(Arrays.copyOfRange(lines, 1, lines.length - 1))
+        .stream()
+        .map(l -> l.startsWith(" * "))
+        .allMatch(b -> b);
+
+    return 
+      Stream.of(
+        selection.startsWith("/*"),
+        midPartStartsWithStar,
+        selection.endsWith(" */")
+      ).allMatch(b -> b);
   }
 
 }

src/main/java/app/model/languages/Markdown.java

@@ -60,46 +60,49 @@ public class Markdown implements ProgrammingLanguage {
 
   // ----------------------------------------------------------------
 
-  // TODO: fix spacing of arrows
+  String cStart     = "<!-- ";
+  String cEnd       = " -->";
+  String cStartRegex = "<!-- ?";
+  String cEndRegex   = " ?-->\\s{0,}";
 
   public String commentLine(String line) {
-    return "<!-- " + line + " -->";
+    return  cStart + line + cEnd;
   }
 
   public String unCommentLine(String line) {
     return line
-      .replaceFirst("<!-- ?", "")
+      .replaceFirst(cStartRegex, "")
-      .replaceAll("-->\\s+?", "");
+      .replaceAll(cEndRegex, "");
   }
 
   public boolean isCommentedLine(String line) {
-    return line.startsWith("<!--") && line.endsWith("-->");
+    return line.startsWith(cStart) && line.endsWith(cEnd);
   }
 
 
   public String commentSelection(String selection) {
     return
-      "<!-- " +
+      cStart + selection + cEnd;
-      selection.lines()
-        .map(l -> " * " + l)
-        .collect(Collectors.joining("\n"))
-      + " -->";
   }
 
   public String unCommentSelection(String selection) {
-    var lines = selection.split("\n");
+    String[] lines     = selection.split("\n");
-    var firstLine = lines[0];
+    String   firstLine = lines[0];
-    var lastLine = lines[lines.length - 1];
+    String   lastLine  = lines[lines.length - 1];
-    var midlines = Arrays.copyOfRange(lines, 1, lines.length - 1);
+
+    String midLineString =
+      lines.length < 3 ?
+      "" :
+      String.join("\n", Arrays.copyOfRange(lines, 1, lines.length - 1)) + "\n";
 
     return
-      firstLine.replaceFirst("<!-- ", "")
+      firstLine.replaceFirst(cStartRegex, "") + "\n"
-      + String.join("\n", midlines)
+      + midLineString
-      + lastLine.replaceAll(" -->\\s+?", "");
+      + lastLine.replaceAll(cEndRegex, "");
   }
 
   public boolean isCommentedSelection(String selection) {
-    return selection.startsWith("<!--") && selection.endsWith("-->");
+    return selection.startsWith(cStart) && selection.endsWith(cEnd);
   }
 
 }