BREAKING CHANGE: add logging function for basic error types (#363)

**Issue
number:[ADDON-68670](https://splunk.atlassian.net/browse/ADDON-68670)**

## Summary
Extending log module with new error logging functions. Breaking change
for `log_exception` function.

### Changes

* added new functions for error logging.
* added `exc_l` parameter to logging message to categorize errors.
* added `exc_l` parameter to `log_exception` function as a mandatory
argument to log errors with custom category.

### User experience

* user can categorize errors in the add-on using new functions. For now
5 basic categories are prepered: Authentication, Permission, Connection,
Configuration, Server.
* user can add custom error category using `log_exception` function by
adding another args `exc_label`
* all user's current use of the `log_exception` function must be
extended with a `exc_label` argument to categorize error.

## Checklist

If your change doesn't seem to apply, please leave them unchecked.

* [x] I have performed a self-review of this change
* [x] Changes have been tested
* [] Changes are documented
* [x] PR title follows [conventional commit
semantics](https://www.conventionalcommits.org/en/v1.0.0/)

solnlib/log.py

@@ -20,6 +20,7 @@
 import logging.handlers
 import os.path as op
 import traceback
+from functools import partial
 from threading import Lock
 from typing import Dict, Any
 
@@ -251,6 +252,31 @@ def modular_input_end(logger: logging.Logger, modular_input_name: str):
     )
 
 
+def _base_error_log(
+    logger,
+    exc: Exception,
+    exe_label,
+    full_msg: bool = True,
+    msg_before: str = None,
+    msg_after: str = None,
+):
+    log_exception(
+        logger,
+        exc,
+        exc_label=exe_label,
+        full_msg=full_msg,
+        msg_before=msg_before,
+        msg_after=msg_after,
+    )
+
+
+log_connection_error = partial(_base_error_log, exe_label="Connection Error")
+log_configuration_error = partial(_base_error_log, exe_label="Configuration Error")
+log_permission_error = partial(_base_error_log, exe_label="Permission Error")
+log_authentication_error = partial(_base_error_log, exe_label="Authentication Error")
+log_server_error = partial(_base_error_log, exe_label="Server Error")
+
+
 def events_ingested(
     logger: logging.Logger,
     modular_input_name: str,
@@ -303,12 +329,34 @@ def events_ingested(
 def log_exception(
     logger: logging.Logger,
     e: Exception,
+    exc_label: str,
     full_msg: bool = True,
     msg_before: str = None,
     msg_after: str = None,
     log_level: int = logging.ERROR,
 ):
-    """General function to log exceptions."""
+    """General function to log exceptions.
+
+    Arguments:
+        logger: Add-on logger.
+        e: Exception to log.
+        exc_label: label for the error to categorize it.
+        full_msg: if set to True, full traceback will be logged. Default: True
+        msg_before: custom message before exception traceback. Default: None
+        msg_after: custom message after exception traceback. Default: None
+        log_level: Log level to log exception. Default: ERROR.
+    """
+
+    msg = _get_exception_message(e, full_msg, msg_before, msg_after)
+    logger.log(log_level, f'exc_l="{exc_label}" {msg}')
+
+
+def _get_exception_message(
+    e: Exception,
+    full_msg: bool = True,
+    msg_before: str = None,
+    msg_after: str = None,
+) -> str:
     exc_type, exc_value, exc_traceback = type(e), e, e.__traceback__
     if full_msg:
         error = traceback.format_exception(exc_type, exc_value, exc_traceback)
@@ -318,5 +366,4 @@ def log_exception(
     msg_start = msg_before if msg_before is not None else ""
     msg_mid = "".join(error)
     msg_end = msg_after if msg_after is not None else ""
-    msg = f"{msg_start}\n{msg_mid}\n{msg_end}"
-    logger.log(log_level, msg)
+    return f"{msg_start}\n{msg_mid}\n{msg_end}"

tests/unit/test_log.py

@@ -247,9 +247,10 @@ def test_log_exceptions_full_msg():
             test_jsons = "{'a': 'aa'"
             json.loads(test_jsons)
         except Exception as e:
-            log.log_exception(mock_logger, e, msg_before=start_msg)
+            log.log_exception(mock_logger, e, "test type1", msg_before=start_msg)
             mock_logger.log.assert_called_with(
-                logging.ERROR, f"{start_msg}\n{traceback.format_exc()}\n"
+                logging.ERROR,
+                f'exc_l="test type1" {start_msg}\n{traceback.format_exc()}\n',
             )
 
 
@@ -262,10 +263,40 @@ def test_log_exceptions_partial_msg():
             json.loads(test_jsons)
         except Exception as e:
             log.log_exception(
-                mock_logger, e, full_msg=False, msg_before=start_msg, msg_after=end_msg
+                mock_logger,
+                e,
+                exc_label="test type",
+                full_msg=False,
+                msg_before=start_msg,
+                msg_after=end_msg,
             )
             mock_logger.log.assert_called_with(
                 logging.ERROR,
-                "some msg before exception\njson.decoder.JSONDecodeError: Expecting property name enclosed in double "
-                "quotes: line 1 column 2 (char 1)\n\nsome msg after exception",
+                'exc_l="test type" some msg before exception\njson.decoder.JSONDecodeError: Expecting property '
+                "name enclosed in double quotes: line 1 column 2 (char 1)\n\nsome msg after exception",
+            )
+
+
+@pytest.mark.parametrize(
+    "func,result",
+    [
+        ("log_connection_error", '"Connection Error"'),
+        ("log_configuration_error", '"Configuration Error"'),
+        ("log_permission_error", '"Permission Error"'),
+        ("log_authentication_error", '"Authentication Error"'),
+        ("log_server_error", '"Server Error"'),
+    ],
+)
+def test_log_basic_error(func, result):
+    class AddonComplexError(Exception):
+        pass
+
+    with mock.patch("logging.Logger") as mock_logger:
+        try:
+            raise AddonComplexError
+        except AddonComplexError as e:
+            fun = getattr(log, func)
+            fun(mock_logger, e)
+            mock_logger.log.assert_called_with(
+                logging.ERROR, f"exc_l={result} \n{traceback.format_exc()}\n"
             )