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from time import time
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy.sql import text
from app import app
class DB:
def __init__(self):
self.db = SQLAlchemy()
self.db.init_app(app)
def user_new(self, nick):
sql = "INSERT \
INTO users (nick, created) \
VALUES (:nick, :created) \
RETURNING id ;"
result = self.db.session.execute(
text(sql), { "nick":nick, "created":int(time()) }
)
self.db.session.commit()
return result.fetchone()[0]
def user_get_nick(self, id):
sql = "SELECT nick \
FROM users \
WHERE id=(:id);"
result = self.db.session.execute(text(sql), { "id":id }).fetchone()
return result[0] if result else result
def user_exists(self, nick):
sql = "SELECT COUNT(id) \
FROM users \
WHERE nick=(:nick);"
return self.db.session.execute(text(sql), { "nick":nick }).scalar()
def question_new(self, question, neg_ans, pos_ans ):
sql = "INSERT \
INTO questions (question, neg_answer, pos_answer, created) \
VALUES (:question, :neg_answer, :pos_answer, :created) \
RETURNING id ;"
result = self.db.session.execute(
text(sql), {
"question":question,
"neg_answer":neg_ans,
"pos_answer":pos_ans,
"created":int(time()) }
)
self.db.session.commit()
return result.fetchone()[0]
def quiz_new(self, user_id):
sql = "INSERT \
INTO questionaires (creator_id, created) \
VALUES (:creator_id, :created) \
RETURNING id ;"
result = self.db.session.execute( text(sql),
{ "creator_id":user_id, "created":int(time()) } )
self.db.session.commit()
return result.fetchone()[0]
def quiz_add(self, quiz_id, question_id ):
sql = "UPDATE questionaires \
SET questionset = ARRAY_APPEND(questionset, :question_id) \
WHERE id=:quiz_id;"
self.db.session.execute(text(sql), {
"quiz_id":quiz_id,
"question_id":question_id
})
self.db.session.commit()
def set_quiz_link( self, quiz_id, link ):
sql = "INSERT \
INTO quiz_links (quiz_id, link, created) \
VALUES (:quiz_id, :link, :created)"
result = self.db.session.execute( text(sql),
{ "quiz_id":quiz_id, "link":link, "created":int(time()) } )
self.db.session.commit()
def find_quiz_by_link( self, link ):
sql = "SELECT quiz_id \
FROM quiz_links \
WHERE link=:link;"
result = self.db.session.execute(text(sql), { "link":link }).fetchone()
return result[0] if result else False
def get_quiz_link( self, quiz_id ):
sql = "SELECT link \
FROM quiz_links \
WHERE quiz_id=:quiz_id;"
result = self.db.session.execute(text(sql), { "quiz_id":quiz_id }).fetchone()
return result[0] if result else result
def answer_new(self, user_id, question_id, answer):
sql = "INSERT \
INTO answers (user_id, question_id, answer, created) \
VALUES (:user_id, :question_id, :answer, :created);"
self.db.session.execute( text(sql), {
"user_id":user_id,
"question_id":question_id,
"answer":answer,
"created":int(time())
} )
self.db.session.commit()
def get_questions(self, quiz_id):
sql = "SELECT q.id, q.question, q.neg_answer, q.pos_answer, a.answer \
FROM questionaires quiz \
JOIN questions q ON q.id = ANY(quiz.questionset) \
JOIN answers a ON a.user_id = quiz.creator_id \
WHERE a.question_id = q.id AND quiz.id = (:quiz_id);"
return self.db.session.execute( text(sql), { "quiz_id":quiz_id } ).fetchall()
def get_comparable(self, quiz_id,user1,user2):
sql = "SELECT q.question, q.neg_answer, q.pos_answer, \
a1.answer, a2.answer, \
100 - ABS( a1.answer - a2.answer ) / 10 \
FROM questionaires quiz \
JOIN questions q ON q.id = ANY(quiz.questionset) \
JOIN answers a1 ON a1.user_id = (:user1) \
JOIN answers a2 ON a2.user_id = (:user2) \
WHERE a1.question_id = q.id \
AND a2.question_id = q.id \
AND quiz.id = (:quiz_id);"
return self.db.session.execute( text(sql), {
"quiz_id":quiz_id,
"user1":user1,
"user2":user2
} ).fetchall()
def get_user_answer(self, user_id, question_id):
sql = "SELECT answer \
FROM answers \
WHERE question_id = (:question_id) AND user_id = (:user_id);"
result = self.db.session.execute( text(sql), {
'question_id': question_id,
'user_id': user_id
} ).fetchone()
return result[0] if result else -1
def get_user_answers_for_quiz(self, quiz_id, user_id):
sql = "SELECT a.question_id, a.answer \
FROM questionaires quiz \
JOIN answers a ON a.question_id = ANY(quiz.questionset) \
WHERE a.user_id = (:user_id) AND quiz.id = (:quiz_id);"
return self.db.session.execute( text(sql), {
'user_id': user_id,
'quiz_id': quiz_id
} ).fetchall()
def get_users_answered(self, quiz_id):
sql = "SELECT DISTINCT a.user_id, u.nick \
FROM questionaires quiz \
JOIN answers a ON a.question_id = quiz.questionset[1] \
JOIN users u ON u.id = a.user_id \
WHERE quiz.id = (:quiz_id);"
return self.db.session.execute( text(sql), {
'quiz_id': quiz_id
} ).fetchall()
def is_user_answered(self, quiz_id, user_id):
sql = "SELECT a.answer \
FROM questionaires quiz \
JOIN answers a ON a.question_id = quiz.questionset[1] \
WHERE quiz.id = (:quiz_id) AND a.user_id = (:user_id);"
results = self.db.session.execute( text(sql), {
'quiz_id': quiz_id,
'user_id': user_id
} ).fetchone()
return True if results else False
def get_all_answers_for_quiz(self, quiz_id):
sql = "SELECT a.question_id, a.user_id, a.answer \
FROM questionaires quiz \
JOIN answers a ON a.question_id = ANY(quiz.questionset) \
WHERE quiz.id = (:quiz_id);"
return self.db.session.execute( text(sql), {
'quiz_id': quiz_id
} ).fetchall()
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