From ae5893c22fbe9fa2c35c5073eb285d0552c79098 Mon Sep 17 00:00:00 2001
From: "D. Scott Boggs" <scott@tams.tech>
Date: Sat, 31 May 2025 09:10:17 -0400
Subject: [PATCH] add structured logging

---
 pyproject.toml           |  9 ++++++++-
 roc_fnb/util/__init__.py |  1 +
 roc_fnb/util/logging.py  | 30 ++++++++++++++++++++++++++++++
 3 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 roc_fnb/util/__init__.py
 create mode 100644 roc_fnb/util/logging.py

diff --git a/pyproject.toml b/pyproject.toml
index 693bd80..c968c61 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,8 +9,15 @@ description = "Temporary placeholder for fnb web site"
 readme = "README.md"
 requires-python = ">=3.11" # Self type added
 license = "AGPL-3.0-only"
-dependencies = ["flask", "gunicorn"]
+dependencies = [
+    "flask",
+    "gunicorn",
+    "structlog",
+]
 dynamic = ["version"]
 
 [project.scripts]
 # Put scripts here
+
+[tool.yapf]
+based_on_style = "facebook"
\ No newline at end of file
diff --git a/roc_fnb/util/__init__.py b/roc_fnb/util/__init__.py
new file mode 100644
index 0000000..0be7677
--- /dev/null
+++ b/roc_fnb/util/__init__.py
@@ -0,0 +1 @@
+from roc_fnb.util.logging import log
\ No newline at end of file
diff --git a/roc_fnb/util/logging.py b/roc_fnb/util/logging.py
new file mode 100644
index 0000000..b98508a
--- /dev/null
+++ b/roc_fnb/util/logging.py
@@ -0,0 +1,30 @@
+import logging
+from os import environ
+
+from structlog.processors import JSONRenderer, TimeStamper
+from structlog.dev import ConsoleRenderer
+import structlog
+
+if not structlog.is_configured():
+    if (env := environ.get('ENV_MODE')) and env == 'production':
+        timestamper = TimeStamper(fmt="%Y-%m-%d %H:%M:%S", utc=True)
+        renderer: JSONRenderer | ConsoleRenderer = JSONRenderer()
+    else:
+        timestamper = TimeStamper(fmt="%Y-%m-%d %H:%M:%S", utc=False)
+        renderer = ConsoleRenderer()
+    structlog.configure(
+        processors=[
+            structlog.contextvars.merge_contextvars,
+            structlog.processors.add_log_level,
+            structlog.processors.StackInfoRenderer(),
+            structlog.dev.set_exc_info,
+            timestamper,
+            renderer,
+        ],
+        wrapper_class=structlog.make_filtering_bound_logger(logging.NOTSET),
+        context_class=dict,
+        logger_factory=structlog.PrintLoggerFactory(),
+        cache_logger_on_first_use=False
+    )
+
+log = structlog.get_logger()