improves random word generation

- only words matching a-zA-Z are used,
  which removes some situations where
  the generated code was not readable
  by the android application
- words are now under 10 characters long
- function flow improved for readability

bump/bump.py

@@ -76,12 +76,17 @@ class Bump:
         return secrets
 
     def generate_secret(self, secrets_file):
+        pattern = re.compile('^[a-zA-Z]+$')
         WORDS = r.get_random_words()
         secret = ""
-        for _ in range(SENDER_LENGTH + PASSWORD_LENGTH):
-            secret += random.choice(WORDS) + "-"
-        while len(secret[SENDER_LENGTH:]) < 32:
-            secret += random.choice(WORDS) + "-"
+        word_count = 0
+        while word_count < SENDER_LENGTH + PASSWORD_LENGTH or len(secret[SENDER_LENGTH:]) < 32:
+            word = random.choice(WORDS)
+            print(pattern.match(word))
+            if pattern.match(word) and len(word) < 10:
+                secret += word + "-"
+                word_count += 1
+
         secret = secret[:-1]
 
         self.secrets.append(secret)