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from fastapi import FastAPI
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from fastapi.middleware.cors import CORSMiddleware # CORS
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from fastapi.staticfiles import StaticFiles
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import json
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import random
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from pathlib import Path
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from datetime import datetime
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from settings import WAVE, END_TEST_PASSWORD, QUIZ_LENGTH
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app = FastAPI()
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origins = [ # CORS
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"*",
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]
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app.add_middleware( # CORS
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CORSMiddleware,
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allow_origins=origins,
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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)
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# student_answers_example = {
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# "version": 1,
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# "student": "asd",
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# "wave": 0,
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# "questions": [
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# {
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# "id": 4,
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# "question": "Сколько винтов у теодолита?",
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# "student_answer": 100
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# }
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# ]
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# }
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# open files once and use variables after
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with open("questions.json", "r", encoding="UTF-8") as f:
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content = json.load(f)
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all_questions = content["questions"]
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topics_questions = all_questions # don't use topics for now. see next to lines to use topics
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# topics = ["теодолит"] # move topics to VARIABLES
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# topics_questions = [q for q in all_questions if q.get("topic") in topics]
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remove_keys = ["author", "answer", "topic"]
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quiz_questions = [{key: value for key, value in q.items() if key not in remove_keys} for q in topics_questions]
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with open("students.json", "r", encoding="UTF-8") as f:
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content = json.load(f)
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students = content["students"]
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# create folders if they don't exist
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Path("answers").mkdir(parents=True, exist_ok=True)
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Path("results").mkdir(parents=True, exist_ok=True)
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def check_answers(student_answers: dict):
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checked_answers = student_answers
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for a in checked_answers["questions"]:
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question_id = a["id"]
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a["correct_answer"] = next(question["answer"] for question in topics_questions if question["id"] == question_id)
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a["is_correct"] = a["student_answer"] == a["correct_answer"]
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checked_answers["correct"] = sum([a["is_correct"] for a in checked_answers["questions"]])
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checked_answers["correct_percent"] = round(checked_answers["correct"] * 100 / len(checked_answers["questions"]))
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return checked_answers
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@app.get("/students")
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def show_students():
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return students
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@app.get("/get_quiz")
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def get_quiz(student_id, student: str):
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"""Get json-like quiz
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Args:
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student_id (int): indentificator of a student
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student (str): student name
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Returns:
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obj: json-like quiz
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"""
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quiz_length = QUIZ_LENGTH
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questions_for_student = random.sample(quiz_questions, len(quiz_questions))[:quiz_length] # random order and only first n questions
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return {
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"version": 1,
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"student_id": student_id,
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"student": student,
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"wave": WAVE, # волна сдачи теста
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"start_time": datetime.now().strftime("%Y-%m-%dT%H-%M-%S"),
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"questions": questions_for_student
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}
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@app.get("/save_student_answers")
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def send_student_answers(student_answers: str):
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"""Save answers as-is and check answers
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Args:
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student_answers (str): json-like string with student's answers
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Returns:
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str: student name
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"""
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json_answers = json.loads(student_answers)
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timestamp_str = datetime.now().strftime("%Y-%m-%dT%H-%M-%S")
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json_answers["end_time"] = timestamp_str
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path_to_answers = f'answers/{json_answers["student"]}_{json_answers["wave"]}_{timestamp_str}.json'
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with open(path_to_answers, 'w', encoding='utf-8') as f:
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json.dump(json_answers, f, ensure_ascii=False)
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path_to_results = f'results/{json_answers["student"]}_{json_answers["wave"]}_{timestamp_str}.json'
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with open(path_to_results, 'w', encoding='utf-8') as f:
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json.dump(check_answers(json_answers), f, ensure_ascii=False) # TODO move checking to background?
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return json_answers["student"]
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@app.get("/end_quiz")
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def end_test(password: str):
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"""End test and save results to csv
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Args:
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password (str): password to end test
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"""
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if password == END_TEST_PASSWORD:
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csv_string = "student,percent,start,end\n"
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for file_in_results in Path("results").iterdir():
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if file_in_results.is_file() and file_in_results.suffix == ".json":
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print(file_in_results)
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with open(file_in_results, "r", encoding="UTF-8") as f:
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content = json.load(f)
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csv_string += f"{content['student']},{content['correct_percent']},{content['start_time']},{content['end_time']}\n"
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timestamp = datetime.now().strftime("%Y-%m-%dT%H-%M-%S")
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results_path = Path(f"results/results_{timestamp}.csv")
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with open(results_path, "w", encoding='utf-8') as f:
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f.write(csv_string)
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return(f"Тестирование завершено. Сводные результаты сохранены в {results_path.resolve()}")
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else:
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return("Неверный пароль")
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app.mount("/", StaticFiles(directory="gui", html = True), name="gui") # must be after method since it uses them
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