RDM 9 backend example

import flask
import json
import math
from flask import request, jsonify, render_template

app = flask.Flask(__name__) # creating an instance of the Flask class

app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 0

dungeon1 = [
"#######",
"#.....#",
"#.###.#",
"#.#G#.#",
"#.#.#.#",
"#.#...#",
"#@#####"]

dungeon2 = [
"##########",
"#.....####",
"#.###x##.#",
"#.#G#.##x#",
"#.#.#....#",
"#x..#x##x#",
"#####.####",
"##.......#",
"#.x#.###x#",
"####@#####"]

gameOn = False
playerDir  = "up"
playerDir2 = "up"
playerPos  = [6,1]
playerPos2 = [9,4]
playerHP   = 5

def movePos(pos,dir):
  if dir == "up":
    return [pos[0]-1,pos[1]]
  if dir == "left":
    return [pos[0],pos[1]-1]
  if dir == "right":
    return [pos[0],pos[1]+1]
  if dir == "down":
    return [pos[0]+1,pos[1]]

def initGame():
  global playerDir
  global playerDir2
  global playerPos
  global playerPos2
  global playerHP
  global gameOn
  gameOn = True
  playerDir  = "up"
  playerDir2 = "up"
  playerPos  = [6,1]
  playerPos2 = [9,4]
  playerHP = 5

def initGameHard():
  global playerDir
  global playerDir2
  global playerPos
  global playerPos2
  global playerHP
  global gameOn
  gameOn = True
  playerDir  = "up"
  playerDir2 = "up"
  playerPos  = [9,4]
  playerHP = 5

def play(dungeon,move):
  global playerDir
  global playerPos
  global playerHP
  global gameOn
  steppables = [".","@","G","x"]
  if move == "forward":
    newPos = movePos(playerPos,playerDir)
    if newPos[0] < 0 or newPos[1] < 0 or newPos[0] >= len(dungeon) or newPos[1] >= len(dungeon[0]):
      return "You give up trying to find the treasure and leave the maze."
    if dungeon[newPos[0]][newPos[1]] in steppables:
      playerPos = newPos
    if dungeon[playerPos[0]][playerPos[1]] == "G":
      gameOn = False
      return "You found the treasure!"
    elif dungeon[playerPos[0]][playerPos[1]] == "x" and playerHP > 0:
      playerHP -= 1
      if playerHP == 0:
          gameOn = False
          return "You died."
      return "You step on a trap!"
  elif move == "left":
    if playerDir == "up":
      playerDir = "left"
    elif playerDir == "left":
      playerDir = "down"
    elif playerDir == "down":
      playerDir = "right"
    elif playerDir == "right":
      playerDir = "up"
  elif move == "right":
    if playerDir == "up":
      playerDir = "right"
    elif playerDir == "left":
      playerDir = "up"
    elif playerDir == "down":
      playerDir = "left"
    elif playerDir == "right":
      playerDir = "down"
  else:
    "Error."
  nextPos = movePos(playerPos,playerDir)
  if nextPos[0] < 0 or nextPos[1] < 0 or nextPos[0] >= len(dungeon) or nextPos[1] >= len(dungeon[0]):
    return "You see the exit to the dungeon."
  if dungeon[nextPos[0]][nextPos[1]] == "." or dungeon[nextPos[0]][nextPos[1]] == "@" or dungeon[nextPos[0]][nextPos[1]] == "x":
    return "You see a corridor."
  if dungeon[nextPos[0]][nextPos[1]] == "#":
    return "You see a wall."
  if dungeon[nextPos[0]][nextPos[1]] == "G":
    return "You see the treasure."
  return "Error."

@app.route('/calculator')
def calc():
    return render_template("index.html")

@app.route('/game')
def game():
    return render_template("game.html")

@app.route('/api/start')
def start():
    initGame()
    return jsonify({"Message": "You find yourself in a dungeon. You remember coming here to look for a hidden treasure in the maze."})

@app.route('/api/startHard')
def startHard():
    initGameHard()
    return jsonify({"Message": "You find yourself in a dungeon. You remember coming here to look for a hidden treasure in the maze.",
                    "Hitpoints":playerHP})

@app.route('/api/play', methods = ['POST'])
def playTurn():
    global dungeon1
    global gameOn
    if not gameOn:
        return jsonify({"Message":"Error."})
    dungeon = dungeon1
    print(request)
    data = request.get_json()
    print(data)
    move = data['move']
    result = play(dungeon,move)
    return jsonify({"Message":result})

@app.route('/api/playHard', methods = ['POST'])
def playTurnHard():
    global dungeon2
    global playerHP
    global gameOn
    if not gameOn:
        return jsonify({"Message":"The game is not started."})
    dungeon = dungeon2
    data = request.get_json()
    move = data['move']
    result = play(dungeon,move)
    return jsonify({"Message":result,"Hitpoints":playerHP, "pos":playerPos})


if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0', port= 8080)