Add cache data

skeleton/project_codename/project_codename.py

@@ -7,13 +7,25 @@
 
 import sys
 import os
+import json
+import time
 import logging
 from logging.handlers import SysLogHandler
 import click
 import click_config_file
 
 
+HOME_FOLDER = os.environ.get('HOME', os.environ.get('USERPROFILE', '/'))
+if HOME_FOLDER == '/':
+    CACHE_FOLDER = '/var/cache'
+    LOG_FOLDER = '/var/log/'
+else:
+    CACHE_FOLDER = f"{HOME_FOLDER}/.local/"
+    LOG_FOLDER = f"{HOME_FOLDER}/log/"
+
+
 class __project_codename_camel__:
+    """__description__"""
 
     def __init__(self, **kwargs):
         self.config = kwargs
@@ -30,6 +42,35 @@ class __project_codename_camel__:
                 '__project_codename__.log'
             )
         self._init_log()
+        self._default_data = {
+            "last_update": 0,
+        }
+        self.data = self._read_cached_data()
+
+    def close(self):
+        '''Close class and save data'''
+        self._save_cached_data(self.data)
+
+    def _read_cached_data(self):
+        if os.path.exists(self.config['cache_file']):
+            with open(self.config['cache_file'], 'r', encoding='utf-8') as cache_file:
+                try:
+                    cached_data = json.load(cache_file)
+                    if (
+                        'last_update' in cached_data and
+                        cached_data['last_update'] + self.config['max_cache_age'] > time.time()
+                    ):
+                        cached_data = self._default_data
+                except json.decoder.JSONDecodeError:
+                    cached_data = self._default_data
+                return cached_data
+        else:
+            return self._default_data
+
+    def _save_cached_data(self, data):
+        data['last_update'] = time.time()
+        with open(self.config['cache_file'], 'w', encoding='utf-8') as cache_file:
+            json.dump(data, cache_file, indent=2)
 
     def _init_log(self):
         ''' Initialize log object '''
@@ -82,12 +123,24 @@ class __project_codename_camel__:
     ),
     help='Set the debug level for the standard output.'
 )
-@click.option('--log-file', '-l', help="File to store all debug messages.")
+@click.option(
+    '--log-file',
+    '-l',
+    default=f"{LOG_FOLDER}/__project_code_name__.log",
+    help="File to store all debug messages."
+)
+@click.option(
+    '--max-cache-age',
+    '-a',
+    default=60*60*24*7,
+    help='Max age in seconds for the cache'
+)
 # @click.option("--dummy","-n", is_flag=True,
 # help="Don't do anything, just show what would be done.")
 @click_config_file.configuration_option()
 def __main__(**kwargs):
-    return __project_codename_camel__(**kwargs)
+    obj = __project_codename_camel__(**kwargs)
+    obj.close()
 
 if __name__ == "__main__":
     __main__()