0ptr/nullptr/store.py

from nullptr.models.base import Base
from nullptr.models.waypoint import Waypoint
from nullptr.models.sector import Sector
from nullptr.models.system import System
from nullptr.models.agent import Agent
from os.path import isfile, dirname, isdir
import os
import json
from .util import *

class Store:
  def __init__(self, data_dir):
    self.data_dir = data_dir
    self.data = {}
    
  def path(self, obj):
    return os.path.join(self.data_dir, obj.path())
    
  def load(self, obj):
    path = self.path(obj)
    if not isfile(path):
      return obj
    with open(path) as f:
      data = json.load(f)
    data['store'] = self
    data['dirty'] = False
    obj.__dict__ = data
  
  def store(self, obj):
    path = self.path(obj)
    path_dir = dirname(path)
    data = obj.dict()
    if not isdir(path_dir):
      os.makedirs(path_dir, exist_ok=True)
    with open(path, 'w') as f:
      json.dump(data, f, indent=2)
    obj.dirty = False
      
  def get(self, typ, symbol):
    obj = typ(symbol, self)
    self.load(obj)
    self.data[symbol] = obj
    return obj
  
  def update(self, typ, symbol, data):
    obj = self.get(typ, symbol)
    obj.update(data)
    return obj
  
  def update_list(self, typ, lst):
    return [self.update(typ, mg(d, 'symbol'), d) for d in lst]
    
  def all(self, path, typ):
    if hasattr(path, 'path'):
      path = path.path()
    path = os.path.join(self.data_dir, path)
    if not isdir(path):
      return
    ext = '.' + typ.ext()
    for f in os.listdir(path):
      fil = os.path.join(path, f)
      if not isfile(fil):
        continue
      if not fil.endswith(ext):
        continue
      symbol = f[:-len(ext)]
      yield self.get(typ, symbol)
    
  
  def flush(self):
    for obj in self.data.values():
      if obj.dirty:
        self.store(obj)