app.py

import re, time
import matplotlib.pyplot as plt
from threading import Timer
import gradio as gr

from transformers import (
  GPT2LMHeadModel, GPT2Tokenizer,
  AutoModelForSequenceClassification, AutoTokenizer,
  pipeline
)
# reference: https://huggingface.co/spaces/bentrevett/emotion-prediction
# and https://huggingface.co/spaces/tareknaous/Empathetic-DialoGPT

def euc_100():
  # 1,2,3. asks about the user's emotions and store data
  print('How was your day?')
  print('On the scale 1 to 10, how would you judge your emotion through the following categories:') # ~ Baymax :)
  emotion_types = ['overall'] #, 'happiness', 'surprise', 'sadness', 'depression', 'anger', 'fear', 'anxiety']
  emotion_degree = []
  input_time = []

  for e in emotion_types:
    while True:
      x = input(f'{e}: ')
      if x.isnumeric() and (0 < int(x) < 11):
        emotion_degree.append(int(x))
        input_time.append(time.gmtime())
        break
      else:
        print('invalid input, my friend :) plz input again')

  # 4. if good mood
  if emotion_degree[0] >= 6:
    print('You seem to be in a good mood today. Is there anything you could notice that makes you happy?')
    while True:
      # timer = Timer(10, ValueError)
      # timer.start()
      x = input('Your answer: ')
      if x == '': # need to change this part to waiting 10 seconds
        print('Whether your good mood is over?')
        print('Any other details that you would like to recall?')
        y = input('Your answer (Yes or No): ')
        if y == 'No':
          break
      else:
        break
    print('I am glad that you are willing to share the experience with me. Thanks for letting me know.')
  
  # 5. bad mood
  else:
    questions = [
      'What specific thing is bothering you the most right now?',
      'Oh, I see. So when it is happening, what feelings or emotions have you got?',
      'And what do you think about those feelings or emotions at that time?',
      'Could you think of any evidence for your above-mentioned thought?',
    ]
    for q in questions:
      print(q)
      y = 'No' # bad mood
      while True:
        x = input('Your answer (example of answer here): ')
        if x == '': # need to change this part to waiting 10 seconds
          print('Whether your bad mood is over?')
          y = input('Your answer (Yes or No): ')
          if y == 'Yes':
            break
        else:
          break
      if y == 'Yes':
        print('Nice to hear that.')
        break

    # reading interface here
    print('Here are some reference articles about bad emotions. You can take a look :)')
    pass


def load_neural_emotion_detector():
  model_name = "joeddav/distilbert-base-uncased-go-emotions-student"
  model = AutoModelForSequenceClassification.from_pretrained(model_name)
  tokenizer = AutoTokenizer.from_pretrained(model_name)
  pipe = pipeline('text-classification', model=model, tokenizer=tokenizer, 
                  return_all_scores=True, truncation=True)
  return pipe

def sort_predictions(predictions):
  return sorted(predictions, key=lambda x: x['score'], reverse=True)

def plot_emotion_distribution(predictions):
  fig, ax = plt.subplots()
  ax.bar(x=[i for i, _ in enumerate(prediction)],
         height=[p['score'] for p in prediction],
         tick_label=[p['label'] for p in prediction])
  ax.tick_params(rotation=90)
  ax.set_ylim(0, 1)
  plt.show()

def rulebase(text):
  keywords = {
    'life_safety': ["death", "suicide", "murder", "to perish together", "jump off the building"],
    'immediacy': ["now", "immediately", "tomorrow", "today"],
    'manifestation': ["never stop", "every moment", "strong", "very"]
  }

  # if found dangerous kw/topics
  if re.search(rf"{'|'.join(keywords['life_safety'])}", text)!=None and \
      sum([re.search(rf"{'|'.join(keywords[k])}", text)!=None for k in ['immediacy','manifestation']]) >= 1:
    print('We noticed that you may need immediate professional assistance, would you like to make a phone call? '
      'The Hong Kong Lifeline number is (852) 2382 0000')
    x = input('Choose 1. "Dial to the number" or 2. "No dangerous emotion la": ')
    if x == '1':
      print('Let you connect to the office')
    else:
      print('Sorry for our misdetection. We just want to make sure that you could get immediate help when needed. '
        'Would you mind if we send this conversation to the cloud to finetune the model.')
      y = input('Yes or No: ')
      if y == 'Yes':
        pass # do smt here


def euc_200(text, testing=True):
  # 2. using rule to judge user's emotion
  rulebase(text)

  # 3. using ML
  if not testing:
    pipe = load_neural_emotion_detector()
    prediction = pipe(text)[0]
    prediction = sort_predictions(prediction)
    plot_emotion_distribution(prediction)
  
  # get the most probable emotion. TODO: modify this part, may take sum of prob. over all negative emotion
  threshold = 0.3
  emotion = {'label': 'sadness', 'score': 0.4} if testing else prediction[0]
  # then judge
  if emotion['label'] in ['surprise', 'sadness', 'anger', 'fear'] and emotion['score'] > threshold:
    print(f'It has come to our attention that you may suffer from {emotion["label"]}')
    print('If you want to know more about yourself, '
      'some professional scales are provided to quantify your current status. '
      'After a period of time (maybe a week/two months/a month) trying to follow the solutions we suggested, '
      'you can fill out these scales again to see if you have improved.')
    x = input('Fill in the form now (Okay or Later): ')
    if x == 'Okay':
      print('Display the form')
    else:
      print('Here are some reference articles about bad emotions. You can take a look :)')

  # 4. If both of the above are not satisfied. What do u mean by 'satisfied' here?
  questions = [
    'What specific thing is bothering you the most right now?',
    'Oh, I see. So when it is happening, what feelings or emotions have you got?',
    'And what do you think about those feelings or emotions at that time?',
    'Could you think of any evidence for your above-mentioned thought? #',
  ]
  for q in questions:
    print(q)
    y = 'No' # bad mood
    while True:
      x = input('Your answer (example of answer here): ')
      if x == '': # need to change this part to waiting 10 seconds
        print('Whether your bad mood is over?')
        y = input('Your answer (Yes or No): ')
        if y == 'Yes':
          break
      else:
        break
    if y == 'Yes':
      print('Nice to hear that.')
      break

  # reading interface here
  print('Here are some reference articles about bad emotions. You can take a look :)')
  pass


tokenizer = GPT2Tokenizer.from_pretrained("tareknaous/dialogpt-empathetic-dialogues")
model = GPT2LMHeadModel.from_pretrained("tareknaous/dialogpt-empathetic-dialogues")
model.eval()

def chat(message, history):
  history = history or []
  eos = tokenizer.eos_token
  input_str = eos.join([x for turn in history for x in turn] + [message])

  bot_input_ids = tokenizer.encode(input_str, return_tensors='pt')
  bot_output_ids = model.generate(bot_input_ids,
                                  max_length=1000,
                                  do_sample=True, top_p=0.9, temperature=0.8,
                                  pad_token_id=tokenizer.eos_token_id)
  response = tokenizer.decode(bot_output_ids[:, bot_input_ids.shape[-1]:][0], 
                             skip_special_tokens=True)

  history.append((message, response))
  return history, history


if __name__ == '__main__':
  # euc_100()
  # euc_200('I am happy about my academic record.')
  title = "PsyPlus Empathetic Chatbot"
  description = "Gradio demo for product of PsyPlus. Based on rule-based CBT and conversational AI model DialoGPT"
  iface = gr.Interface(
    chat,
    ["text", "state"],
    ["chatbot", "state"],
    allow_screenshot=False,
    allow_flagging="never",
    title=title,
    description=description,
  )
  iface.launch(debug=True, server_name="0.0.0.0", server_port=2022, share=True)