api.py

from flask import Flask, request
import logging as log
import redis
import random
import time
from flask_cors import CORS

app = Flask(__name__)
CORS(app)

r = redis.Redis(host='redis', port=6379, db=0)


@app.route('/')
def home():
    return {"service_status_is": "OK"}


@app.route('/init', methods=['POST'])
def init():
    if request.json is None:
        return {"msg": "json pls"}, 422
    if "size" not in request.json or type(request.json["size"]) != int or request.json["size"] <= 0 \
            or request.json["size"] % 2 == 1:
        return {"msg": "give valid size param in json"}

    try:
        size = request.json["size"]
        log.warning(f"flush start {time.time()}")
        r.flushdb()
        # If size is 4 init is done as follows (keys)
        # 1 2 3 4
        # 5 6 7 8
        # 9 10 11 12
        # 13 14 15 16
        # Values are given randomly to these keys. The value set includes 1,1, 2,2 ... 8,8.
        # So there are 8 pairs to match in this example
        log.warning(f"flush end {time.time()}")
        value_list = []
        for i in range(1, (size * size // 2) + 1):
            value_list.append(i)
            value_list.append(i)
        log.warning(value_list)
        random.shuffle(value_list)

        for i in range(1, size * size + 1):  # 1 to size
            r.set(i, value_list[i - 1])
        log.warning(f"done {time.time()}")
    except Exception as e:
        log.exception("err init ", exc_info=e)
        return {"msg": f"err: {e}"}, 500

    return {"msg": "OK"}, 200


@app.route('/get-card', methods=['POST'])
def get_card():
    if request.json is None:
        return {"msg": "json pls"}, 422
    if "index" not in request.json or type(request.json["index"]) != int:
        return {"msg": "give index param in json"}
    value = r.get(request.json["index"])
    if value is None:
        return {"msg": "key does not exist"}, 400
    else:
        try:
            return {"msg": int(value.decode())}, 200
        except Exception as e:
            log.exception("get card value error", exc_info=e)
            return {"msg": "value error"}, 500


@app.route('/submit', methods=['POST'])
def submit():
    if request.json is None:
        return {"msg": "json pls"}, 422
    if "index1" not in request.json or type(request.json["index1"]) != int or "index2" not in request.json or type(
            request.json["index2"]) != int:
        return {"msg": "give index1 and index2 param in json"}

    value1 = r.get(request.json["index1"])
    value2 = r.get(request.json["index2"])
    log.warning(f"value1: {value1} value2: {value2}")
    if value1 is not None and value2 is not None:
        if value1 == value2:
            r.delete(request.json["index1"])
            r.delete(request.json["index2"])
            return {}, 200
        else:
            return {}, 400
    else:
        return {"msg": "one of keys does not exists"}, 400


@app.route('/get-board', methods=['GET'])
def get_board():
    keys = r.keys("*")
    keys_returned = []
    for key in keys:
        try:
            keys_returned.append(int(key.decode()))
        except Exception as e:
            log.exception("get-board value error", exc_info=e)

    return {"keys": keys_returned}, 200


@app.errorhandler(500)
def internal_error(error):
    return {"err": error}, 500


@app.errorhandler(404)
def not_found(error):
    return {"404_not_found": error}, 404