Begin implementing meters

#!/usr/bin/env python3

# -*- coding: utf-8 -*-

ALL_METERS = []

import re

from .model import Reading

def caesurae_together(positions, reward):

    def get_reward(meter: Meter, reading: Reading):

        # TODO: Check if caesurae occur.

        return reward

    return get_reward

def bridge(position, reward):

    def get_reward(meter: Meter, reading: Reading):

        # TODO: Check if bridge occurs.

        return reward

    return get_reward

class Meter:

    def __init__(self, name: str, schema: str, conditions: list = None,

                 short_name: str = None):

        self.name = name

        self.schema = schema

        self.conditions = ([cond.__get__(self) for cond in conditions]

                           if conditions else [])

        self.short_name = short_name

    def match_reading(self, reading: Reading):

        return re.match(self.schema, reading.get_syllable_schema())

    def get_rewards(self, reading: Reading):

        return sum(cond(reading) for cond in self.conditions)

ALL_METERS = [

    Meter(

        'Catalectic Dactylic Hexameter',

        r'(–)(⏑⏑|–)(–)(⏑⏑|–)(–)(⏑⏑|–)(–)(⏑⏑|–)(–)(⏑⏑|–)(⏑|–)',

        phenomena={

            caesurae_together([('mora', 6, 'Trithemimeral'),

                               ('mora', 14, 'Hephthemimeral')], 2),

            caesurae_together([('mora', 10, 'Penthemimeral')], 1),

            caesurae_together([('mora', 16, 'Bucolic Diaeresis')], 1),

            bridge(('mora', 15, 'Hermann’s Bridge'), 1)

        },

        short_name='6da‸'

    ),

    Meter(

        'Iambic Trimeter',

        r'(⏑|⏑⏑|–)(⏑⏑|–)(⏑)(⏑⏑|–)(⏑|⏑⏑|–)(⏑⏑|–)(⏑)(⏑⏑|–)(⏑|⏑⏑|–)(⏑⏑|–)(⏑)(⏑|–)',

        phenomena={

            caesurae_together([('element', 4, 'After fourth element')], 1),

            caesurae_together([('element', 8, 'After eighth element')], 1),

        },

        short_name='3ia'

    ),

]