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from pychord import Chord
from constants import notes, strings, enharmonic_map, html_string_ids
class ChordToneGenerator:
def __init__(self, chords):
self.chords = chords
self.chord_map = {}
self.note_to_fret_map = {}
self.prepped_chord_map = {}
self.all_frets = []
self.counts = None
def main(self):
self.generate_chord_map()
self.prepare_chord_map()
self.prepare_counts()
def generate_chord_map(self):
for chord in self.chords:
if chord not in self.chord_map:
self.chord_map[chord] = {}
c = Chord(chord)
for note in c.components():
self.chord_map[chord][note] = self.determine_frets(note)
def determine_frets(self, note):
if note not in self.note_to_fret_map:
frets = []
for string in strings:
current_string = (notes[notes.index(string):] + notes[:notes.index(string)]) * 2
if note in enharmonic_map:
note = enharmonic_map[note]
frets.append([i for i, x in enumerate(current_string) if x == note and i <= 12])
self.note_to_fret_map[note] = frets
return self.note_to_fret_map[note]
def prepare_chord_map(self):
for chord, data in self.chord_map.items():
self.prepped_chord_map[chord] = []
for note, strings in data.items():
for idx, string in enumerate(strings):
for fret in string:
html_fret = f'{html_string_ids[idx]}{fret}'
self.prepped_chord_map[chord].append(html_fret)
self.all_frets.append(html_fret)
def prepare_counts(self):
self.counts = {x:self.all_frets.count(x) for x in self.all_frets}
if __name__ == '__main__':
t = ChordToneGenerator(["Ab", "Dsus2"])
t.main()
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