Convert solver functions into a solver class.

This is prep for having additional solvers that can be trivially
swapped in and out.

solver.py

@@ -3,80 +3,85 @@
 import string
 from collections import defaultdict
 
+import constraints
 import dictionary
+import game
 
 
-def analyze_dictionary(wordle_dictionary):
-    # Word Position, Letter: Count
-    position_matches = [
-        defaultdict(int),
-        defaultdict(int),
-        defaultdict(int),
-        defaultdict(int),
-        defaultdict(int),
-    ]
+class SimilaritySolver(object):
+    @staticmethod
+    def _analyze_dictionary(words):
+        # Word Position, Letter: Count
+        position_matches = [
+            defaultdict(int),
+            defaultdict(int),
+            defaultdict(int),
+            defaultdict(int),
+            defaultdict(int),
+        ]
 
-    # Letter: Count
-    word_matches = defaultdict(int)
+        # Letter: Count
+        word_matches = defaultdict(int)
 
-    for word in wordle_dictionary:
-        unique_letters = set(word)
-        for letter in unique_letters:
-            word_matches[letter] += 1
+        for word in words:
+            unique_letters = set(word)
+            for letter in unique_letters:
+                word_matches[letter] += 1
 
+            for index in range(len(word)):
+                letter = word[index]
+                assert letter in string.ascii_lowercase
+                position_matches[index][letter] += 1
+
+        return position_matches, word_matches
+
+    @staticmethod
+    def _score_word(position_matches, word_matches, word):
+        result = 0
+
+        # Green Score
         for index in range(len(word)):
             letter = word[index]
-            assert letter in string.ascii_lowercase
-            position_matches[index][letter] += 1
+            green_score = position_matches[index][letter]
+            result += 10 * green_score
 
-    return position_matches, word_matches
+        # Yellow Score
+        for letter in set(word):
+            yellow_score = word_matches[letter]
+            result += yellow_score
 
+        return result
 
-def score_word(position_matches, word_matches, word):
-    result = 0
+    def scored_words(self, wordle_dictionary=dictionary.words()):
+        # word: score
+        scored_words = dict()
 
-    # Green Score
-    for index in range(len(word)):
-        letter = word[index]
-        green_score = position_matches[index][letter]
-        result += 10 * green_score
+        position_matches, word_matches = self._analyze_dictionary(wordle_dictionary)
 
-    # Yellow Score
-    for letter in set(word):
-        yellow_score = word_matches[letter]
-        result += yellow_score
+        for word in wordle_dictionary:
+            scored_words[word] = self._score_word(position_matches, word_matches, word)
 
-    return result
+        result = list(wordle_dictionary)
+        result.sort(key=lambda word: scored_words[word], reverse=True)
 
-
-def scored_words(wordle_dictionary=dictionary.words()):
-    # word: score
-    scored_words = dict()
-
-    position_matches, word_matches = analyze_dictionary(wordle_dictionary)
-
-    for word in wordle_dictionary:
-        scored_words[word] = score_word(position_matches, word_matches, word)
-
-    result = list(wordle_dictionary)
-    result.sort(key=lambda word: scored_words[word], reverse=True)
-
-    return [(word, scored_words[word]) for word in result]
+        return [(word, scored_words[word]) for word in result]
 
 
 if __name__ == "__main__":
+    solve = SimilaritySolver()
+
     consts = constraints.Constraints()
     consts.update_graded(
         "cares",
         [
-            solver.LetterResult.INCORRECT,
-            solver.LetterResult.INCORRECT,
-            solver.LetterResult.INCORRECT,
-            solver.LetterResult.INCORRECT,
-            solver.LetterResult.INCORRECT,
+            game.LetterResult.INCORRECT,
+            game.LetterResult.INCORRECT,
+            game.LetterResult.INCORRECT,
+            game.LetterResult.INCORRECT,
+            game.LetterResult.INCORRECT,
         ],
     )
 
     valid_words = consts.filter_words(dictionary.words())
 
-    print("Top: ", solver.scored_words(valid_words)[:5])
+    print("Top: ", solve.scored_words(valid_words)[:5])