import os
import json

def get_datadir():
    return os.getenv('SB_DATADIR')

def get_article_path(slug):
    return os.path.join(get_datadir(), 'articles', slug + '.json')

def load_article_by_slug(slug):
    with open(get_article_path(slug), 'r') as f:
        return json.load(f)

def save_article(data):
    with open(get_article_path(data['slug']), 'r') as f:
        return json.save(data, f)

def get_date_report_path(date):
    dstr = date.strftime('%Y-%m-%d')
    return os.path.join(get_datadir(), 'days', dstr + '.json')

def load_date_report(date):
    with open(get_date_report_path(date), 'r') as f:
        return json.load(f)

def save_date_report(date, data):
    with open(get_date_report_path(date), 'w') as f:
        json.dump(data, f)