Matilda Sönnergaard

src/main/java/com/booleanuk/Scrabble.java

@@ -1,12 +1,84 @@
 package com.booleanuk;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class Scrabble {
+    String word;
     public Scrabble(String word) {
+        this.word = word;
+    }
 
+    private int getLetterScore(String letter) {
+        if ("AEIOULNRSTaeioulnrst".contains(letter)) {
+            return 1;
+        } else if ("DGdg".contains(letter)) {
+            return 2;
+        } else if ("BCMPbcmp".contains(letter)) {
+            return 3;
+        } else if ("FHVWYfhvwy".contains(letter)) {
+            return 4;
+        } else if ("Kk".contains(letter)) {
+            return 5;
+        } else if ("JXjx".contains(letter)) {
+            return 8;
+        } else if ("QZqz".contains(letter)) {
+            return 10;
+        }
+        return 0;
     }
 
     public int score() {
-        return -1;
-    }
+        int score = 0;
+        boolean insideWord = false;
+        boolean bracketInsideWord = false;
+        int lettersInARowCountdown = 2;  // to make sure single letter multipliers work correctly
+
+        int multiplier = 1;
+        List<String> brackets = new ArrayList<>();
+
+        for (int i = 0; i<word.length(); i++) {
+            String letter = word.substring(i, i + 1);
+            int letterScore = getLetterScore(letter);
+            score += multiplier * letterScore;
 
+            insideWord |= letterScore > 0;
+
+            if (lettersInARowCountdown == 0) return 0;
+            if (bracketInsideWord) lettersInARowCountdown--;
+
+            if (letterScore == 0) {
+                if (letter.equals("[")) {
+                    multiplier *= 3;
+                    brackets.add("[");
+                    bracketInsideWord = insideWord;
+                } else if (letter.equals("{")) {
+                    multiplier *= 2;
+                    brackets.add("{");
+                    bracketInsideWord = insideWord;
+                } else if (letter.equals("]")) {
+                    if (brackets.isEmpty() || !"[".equals(brackets.getLast())) {
+                        return 0;
+                    }
+                    lettersInARowCountdown = 2;
+                    bracketInsideWord = false;
+                    multiplier /= 3;
+                    brackets.removeLast();
+                } else if (letter.equals("}")) {
+                    if (brackets.isEmpty() || !"{".equals(brackets.getLast())) {
+                        return 0;
+                    }
+                    lettersInARowCountdown = 2;
+                    bracketInsideWord = false;
+                    multiplier /= 2;
+                    brackets.removeLast();
+                } else {
+                    return 0;
+                }
+            }
+        }
+
+        if (!brackets.isEmpty()) return 0;
+        return score;
+    }
 }