Add Gitea configuration processing in api.config

src/jcloud_deployment_server/api/config.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from dataclasses import dataclass
+from .exceptions import Fail
 import os
 import jcloud_config_parser
 import ipaddress
@@ -21,7 +23,9 @@ import argparse
 
 __all__ = [
     'load_config',
-    'process_host_and_port'
+    'process_host_and_port',
+    'GiteaWebhookConfig',
+    'process_gitea_webhook_config',
 ]
 
 def load_config(config_directory: pathlib.Path) -> tuple[
@@ -109,4 +113,58 @@ def process_host_and_port(
             logger.error(f'Error in configuration: [server]port: {port} is not between 0 and 65535, using default value.')
             port = default_configuration.server.port
 
-    return host, int(port)
+    return host, int(port)
+
+@dataclass
+class GiteaWebhookConfig:
+    enabled: bool
+    secret_file_path: pathlib.Path
+
+def _is_readable_file(path: pathlib.Path) -> bool:
+    '''
+    Returns whether the file is readable and exists.
+
+    :param path: The file path.
+    :type path: pathlib.Path
+
+    :return: Whether the file is readable and exists.
+    :rtype: bool
+    '''
+
+    if not path.exists():
+        return False
+    
+    try:
+        with open(str(path), 'rb'):
+            pass
+    except (OSError, PermissionError):
+        return False
+    
+    return True
+
+def process_gitea_webhook_config(
+        configuration: jcloud_config_parser.ini.INIConfiguration,
+        logger: logging.Logger
+    ) -> GiteaWebhookConfig:
+    '''
+    Processes the Gitea webhook configuration.
+    
+    :param configuration: The configuration.
+    :type configuration: jcloud_config_parser.ini.INIConfiguration
+    :param logger: The logger.
+    :type logger: logging.Logger
+    
+    :return: The Gitea webhooks configuration.
+    :rtype: GiteaWebhookConfig
+    '''
+
+    if configuration['gitea'].enabled not in ('true', 'yes', 't', 'y'):
+        return GiteaWebhookConfig(False, None)
+
+    secret_file_path = pathlib.Path(configuration['gitea'].webhook_secret_file)
+
+    if not _is_readable_file(secret_file_path):
+        logger.critical(f'{secret_file_path}: Cannot read Gitea webhook secret file')
+        raise Fail(f'{secret_file_path}: Cannot read Gitea webhook secret file', exit_code = 2)
+    
+    return GiteaWebhookConfig(True, secret_file_path)