Add after_syllable Position classmethod

allzweckmesser/meters.py

@@ -119,15 +119,15 @@ ALL_METERS = {
     'hendecasyllables': Meter(
         'Phalaecian Hendecasyllable',
         AEOLIC_BASE + r'(–)(⏑)(⏑)(–)(⏑)(–)(⏑)(–)(⏑|–)',
-        breaks=[[('element', 6, 'After sixth element')]],
+        breaks=[[('syllable', 6, 'After sixth syllable')]],
         short_name='hendecasyllables',
         id=6
     ),
     'scazon': Meter(
         'Choliamb',
         r'(⏑|–)(–)(⏑)(–)(⏑|–)(–)(⏑)(–)(⏑)(–)(–)(⏑|–)',
-        breaks=[[('element', 5, 'After sixth element')],
-                [('element', 7, 'After sixth element')]],
+        breaks=[[('syllable', 5, 'After fifth syllable')],
+                [('syllable', 7, 'After seventh syllable')]],
         short_name='scazon',
         id=7
     ),

allzweckmesser/model.py

@@ -575,11 +575,48 @@ class Position:
         # TODO: Implement this.
         pass
 
+    @classmethod
+    def after_syllable(cls, reading: Reading, syll_num: int) -> 'Position':
+        morae = 0
+        syllables = 0
+        punctuation = ''
+        for token in reading.tokens:
+            if token.is_punct():
+                punctuation += token.text
+            for i, syllable in enumerate(token.syllables):
+                word_boundary = i == 0
+                if syllables == syll_num and syllable.syllable_length > 0:
+                    position = cls(
+                        reading=reading, mora=morae, token=token,
+                        syllable=syllable, word_boundary=word_boundary,
+                        punctuation=punctuation
+                    )
+                    return position
+                else:
+                    morae += syllable.syllable_length
+                    if syllable.syllable_length > 0:
+                        syllables += 1
+                    punctuation = ''
+        else:
+            # The position has not been found. There are two possibilities:
+            if syllables == syll_num:
+                # The position is at the end of the sentence.
+                position = cls(
+                    reading=reading, mora=morae, token=None, syllable=None,
+                    word_boundary=True, punctuation=punctuation
+                )
+                return position
+            else:
+                # There is no syllable boundary at the given syllable.
+                return None
+
     @classmethod
     def after(cls, type: str, reading: Reading, position_number: int,
               meter: '.meters.Meter') -> 'Position':
         if type == 'mora':
             return cls.after_mora(reading, position_number)
+        elif type == 'syllable':
+            return cls.after_syllable(reading, meter, position_number)
         elif type == 'element':
             return cls.after_element(reading, meter, position_number)
         else: