main.py

import time

import gc
from microbit import *
from speech import say

# Generic talking educational database
generic_ted = {
                'your name': 'My name is Mr. George.',
                'food': 'I like pizza.',
                # ADD MORE HERE
              }

# Define bot talking speed
SPEED = 95

# Button press time
PRESS_TIME = 0.2

# Create alphabet list
alphabet = [
                'a', 
                'b', 
                'c',
                'd',
                'e',
                'f',
                'g',
                'h',
                'i',
                'j',
                'k',
                'l',
                'm',
                'n',
                'o',
                'p',
                'q',
                'r',
                's',
                't',
                'u',
                'v',
                'w',
                'x',
                'y',
                'z'
           ]

# Create empty word string
word = ''

# Create alphabet_position and init to 0
alphabet_position = 0

# Use -1 as arrays are 0 indexed
alphabet_length = len(alphabet) - 1

# Init display with initial value
display.show(alphabet[alphabet_position])
time.sleep(PRESS_TIME)


def bot(ted, question):
    """
    Function to handle bot
    
    Params:
        ted : dict
        question : str
    """
    # Init LED happy image 
    display.show(Image.HAPPY)
    
    # This is an advanced topic as well however this little function
    # cleans out the unnecessary global objects or variables on what
    # we call the heap area in memory
    gc.collect()
    
    # Init response object
    response = ''
    
    # We want to make sure that our dictionary database can 
    # find all values even if you use a capital letter
    # so we convert everything to lowercase 
    question = question.lower()
    
    # If you type something other than an empty string that means 
    # question has a value so the rest of the code will continue
    # on
    if question:
        # This is a bit complicated do not worry about this for now
        # all this is doing is looking through our dictionary database
        # and seeing if our input value has the word or words which
        # match an entry in the dictionary database and if it does
        # put the value in the _response object
        response = [val for key, val in ted.items() if key in question]
        gc.collect()
        
        # If our bot got a response from us then make sure
        # we trigger the speaking or suprised image so our bot
        # can open its mouth to talk and then have our bot
        # talk to us in our REPL and by hearing it speak as well
        # and if the user types in a trigger work that is not 
        # recognized then provide a custom default response
        if response:
            display.show(Image.SURPRISED)
            print('BOT: {0}'.format(response[0]))
            say(str(response[0]), speed=SPEED)
            display.show(Image.HAPPY)
        else:
            display.show(Image.SURPRISED)
            print('BOT: That is not something I am familiar with.')
            say('That is not something I am familiar with.', speed=SPEED)
            display.show(Image.HAPPY)
            
    gc.collect()
    

try:
    while True:
        if button_a.is_pressed():
            if alphabet_position >= alphabet_length:
                time.sleep(PRESS_TIME)
            else:
                alphabet_position += 1
                display.show(alphabet[alphabet_position])
                time.sleep(PRESS_TIME)
        if button_b.is_pressed():
            if alphabet_position <= 0:
                time.sleep(PRESS_TIME)
            else:
                alphabet_position -= 1
                display.show(alphabet[alphabet_position])
                time.sleep(PRESS_TIME)
        if pin_logo.is_touched():
            word += alphabet[alphabet_position]
            display.scroll(word)
            time.sleep(PRESS_TIME)
            display.show(alphabet[alphabet_position])
        if not pin1.read_digital():
            space = ' '
            word += space
            display.show('_')
            time.sleep(PRESS_TIME)
        if not pin2.read_digital():
            bot(generic_ted, word)
            word = ''
            time.sleep(PRESS_TIME + 0.75)
            display.show(alphabet[alphabet_position])
            
        gc.collect()
except:
    pass