92 lines
2.6 KiB
Python
92 lines
2.6 KiB
Python
from config import CONFIG
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from flask import (
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Blueprint, flash, g, redirect, render_template, request, url_for, session
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)
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from auth import login_required
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from create_db import Card, User
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker
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from numpy.random import choice
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bp = Blueprint('deck', __name__)
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engine = create_engine(CONFIG['DB_CONNECTION'])
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dbsessionmaker = sessionmaker(bind=engine)
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dbsession = dbsessionmaker()
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@bp.route('/deck', methods=['GET'])
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def get_collection(user_id):
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c = dbsession.query(Card).filter(Card.owner_id == user_id).all()
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return c
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#2 Probabilistic
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## problem je, da pri probabilističnem težko nardiš, da pač en dan ni nič v decku, ker pač vedno izbere glede določeno število pač glede na uteži
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#
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# to bi bilo dobro narediti direkt iz baze, ne pa da cel collection spremenimo v ta list ob card.objects TODO
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def generate_weights(user_clltn):
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"""generiramo uteži za due in new cards posebej; vrne tuple dveh listov za weightse..."""
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weights_due = []
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weights_new = []
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for card in user_clltn:
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due = card.interest_rate
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if due > 0:
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weights_due.append(due)
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weights_new.append(0)
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else:
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weights_due.append(0)
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weights_new.append(1)
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#če se odločimo, da izločimo iteme jih bo tu ignoriralo, če bo ir 0.
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return weights_new, weights_due
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def probabilistic_deck_generator(user_id, max_new, max_due):
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c = get_collection(user_id)
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deck, dck_due, dck_new, due_cards = [], [], [], 0
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w_new, w_due = generate_weights(c)
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#treba je sestet non zero weights
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new_cards = sum(w_new)
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for w in w_due:
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if w > 0:
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due_cards += 1
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#preverimo, če imamo dovolj kartic
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if new_cards<max_new:
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max_new = new_cards
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if due_cards<max_due:
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max_due = due_cards
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sum_w_new = sum(w_new)
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sum_w_due = sum(w_due)
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if due_cards:
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dck_due = list(choice(c, size=max_due, replace=False, p=list(map(lambda x: x/sum_w_due, w_due)))) #garancija, da ni ponovitev
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if new_cards:
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dck_new = list(choice(c, size=max_new, replace=False, p=list(map(lambda x: x/sum_w_new, w_new))))
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deck = dck_due + dck_new
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return deck
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def get_deck(deck):
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"""naredimo string iz cardov"""
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cards_by_id = ""
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for card in deck:
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cards_by_id += str(card.id) + ","
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cards_by_id = cards_by_id[:-1]
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return cards_by_id
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#################################################
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##TODO
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# config za max_new in max_due
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#################################################
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