1 files changed, 110 insertions, 0 deletions
diff --git a/src/home/config/config.py b/src/home/config/config.py
new file mode 100644
index 0000000..75cfc3a
--- /dev/null
+++ b/src/home/config/config.py
@@ -0,0 +1,110 @@
+import toml
+import logging
+import os
+
+from os.path import join, isdir, isfile
+from typing import Optional, Any, MutableMapping
+from argparse import ArgumentParser
+
+
+def _get_config_path(name: str) -> str:
+    dirname = join(os.environ['HOME'], '.config', name)
+    filename = join(os.environ['HOME'], '.config', f'{name}.toml')
+    if isdir(dirname):
+        return join(dirname, 'config.toml')
+    elif isfile(filename):
+        return filename
+    else:
+        raise IOError(f'configuration file not found (tried {dirname}/config.toml and {filename})')
+
+
+class ConfigStore:
+    data: MutableMapping[str, Any]
+    app_name: Optional[str]
+
+    def __int__(self):
+        self.data = {}
+        self.app_name = None
+
+    def load(self, name: Optional[str] = None,
+             use_cli=True,
+             parser: ArgumentParser = None):
+        self.app_name = name
+
+        if (name is None) and (not use_cli):
+            raise RuntimeError('either config name must be none or use_cli must be True')
+
+        log_default_fmt = False
+        log_file = None
+        log_verbose = False
+
+        path = None
+        if use_cli:
+            if parser is None:
+                parser = ArgumentParser()
+            parser.add_argument('--config', type=str, required=name is None,
+                                help='Path to the config in TOML format')
+            parser.add_argument('--verbose', action='store_true')
+            parser.add_argument('--log-file', type=str)
+            parser.add_argument('--log-default-fmt', action='store_true')
+            args = parser.parse_args()
+
+            if args.config:
+                path = args.config
+            if args.verbose:
+                log_verbose = True
+            if args.log_file:
+                log_file = args.log_file
+            if args.log_default_fmt:
+                log_default_fmt = args.log_default_fmt
+
+        if name and path is None:
+            path = _get_config_path(name)
+
+        self.data = toml.load(path)
+
+        if 'logging' in self:
+            if not log_file and 'file' in self['logging']:
+                log_file = self['logging']['file']
+            if log_default_fmt and 'default_fmt' in self['logging']:
+                log_default_fmt = self['logging']['default_fmt']
+
+        setup_logging(log_verbose, log_file, log_default_fmt)
+
+        if use_cli:
+            return args
+
+    def __getitem__(self, key):
+        return self.data[key]
+
+    def __setitem__(self, key, value):
+        raise NotImplementedError('overwriting config values is prohibited')
+
+    def __contains__(self, key):
+        return key in self.data
+
+
+config = ConfigStore()
+
+
+def is_development_mode() -> bool:
+    if 'FLASK_ENV' in os.environ and os.environ['FLASK_ENV'] == 'development':
+        return True
+
+    return ('logging' in config) and ('verbose' in config['logging']) and (config['logging']['verbose'] is True)
+
+
+def setup_logging(verbose=False, log_file=None, default_fmt=False):
+    logging_level = logging.INFO
+    if is_development_mode() or verbose:
+        logging_level = logging.DEBUG
+
+    log_config = {'level': logging_level}
+    if not default_fmt:
+        log_config['format'] = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+
+    if log_file is not None:
+        log_config['filename'] = log_file
+        log_config['encoding'] = 'utf-8'
+        
+    logging.basicConfig(**log_config)