From 8e06777e51e7ee6948e93ff1a58b876628be650b Mon Sep 17 00:00:00 2001
From: hygienic-books <hygienic-books@tentic.net>
Date: Fri, 11 Mar 2022 01:36:11 +0100
Subject: [PATCH] Add basics for parsing a config file

---
 .gitignore       |  3 +-
 config.ini       |  9 +++--
 main.py          | 86 ++++++++++++++++++++++++++++++++++++++++++++++++
 requirements.in  |  1 +
 requirements.txt | 12 +++++++
 5 files changed, 108 insertions(+), 3 deletions(-)
 create mode 100644 requirements.in
 create mode 100644 requirements.txt

diff --git a/.gitignore b/.gitignore
index bd1f177..058fa64 100644
--- a/.gitignore
+++ b/.gitignore
@@ -234,4 +234,5 @@ fabric.properties
 # ---> Custom
 .idea/deployment.xml
 .idea/misc.xml
-.idea/remote-mappings.xml
\ No newline at end of file
+.idea/remote-mappings.xml
+.idea/mvw-dl.iml
\ No newline at end of file
diff --git a/config.ini b/config.ini
index e59260f..bee91c6 100644
--- a/config.ini
+++ b/config.ini
@@ -11,6 +11,11 @@ state_file_name_suffix = .log
 min_duration = 1200
 max_duration = 2700
 query = @maus-query.json
-query = {"queries":[{"fields":["topic"],"query":"die sendung mit der maus"},{"fields":["channel"],"query":"ARD"}],"sortBy":"timestamp","sortOrder":"desc","future":false,"offset":0,"size":50}
+# query = {"queries":[{"fields":["topic"],"query":"die sendung mit der maus"},{"fields":["channel"],"query":"ARD"}],"sortBy":"timestamp","sortOrder":"desc","future":false,"offset":0,"size":50}
 # state_file_name = maus
-# tmp_base_dir = %(tmp_base_dir)s/maus
\ No newline at end of file
+# tmp_base_dir = %(tmp_base_dir)s/maus
+
+[test]
+min_duration = 100
+max_duration = 200
+query = {"queries":[{"fields":["topic"],"query":"die sendung mit der maus"},{"fields":["channel"],"query":"ARD"}],"sortBy":"timestamp","sortOrder":"desc","future":false,"offset":0,"size":50}
\ No newline at end of file
diff --git a/main.py b/main.py
index 76d0e8c..99f0ba8 100644
--- a/main.py
+++ b/main.py
@@ -1,3 +1,89 @@
+import configparser
+import logging
+import os
+import sys
+from rich.logging import RichHandler
+
+
+# Exit codes
+# 1: Config file invalid, it has no sections
+# 2: Config file invalid, sections must define at least CONST.CFG_MANDATORY
+
+
+class CONST(object):
+    __slots__ = ()
+    LOG_FORMAT = "%(message)s"
+    CFG_DEFAULT_FILENAME = "config.ini"
+    CFG_DEFAULT_ABS_PATH = os.path.join(os.getcwd(), CFG_DEFAULT_FILENAME)
+    CFG_MANDATORY = "query"
+
+
+CONST = CONST()
+logging.basicConfig(
+    level="NOTSET",
+    format=CONST.LOG_FORMAT,
+    datefmt="[%X]",
+    handlers=[RichHandler(
+        show_time=False if "SYSTEMD_EXEC_PID" in os.environ else True,
+        rich_tracebacks=True
+    )]
+)
+log = logging.getLogger("rich")
+log.setLevel(logging.DEBUG)
+
+
+config = configparser.ConfigParser()
+config.read(CONST.CFG_DEFAULT_FILENAME)
+
+
+def validate_config_defaults(config_obj: configparser.ConfigParser()) -> None:
+    log.debug(f"Loading config from file '{CONST.CFG_DEFAULT_ABS_PATH}' ...")
+    if not config_obj.sections():
+        log.error(f"No config sections found in '{CONST.CFG_DEFAULT_ABS_PATH}'. Exiting 1 ...")
+        sys.exit(1)
+    if config.defaults():
+        for default in config_obj.defaults():
+            log.debug(f"    {default} = {config_obj[config_obj.default_section][default]}")
+    else:
+        log.debug(f"No defaults defined")
+
+
+def config_has_valid_section(config_obj: configparser.ConfigParser()) -> bool:
+    has_valid_section = False
+    for config_obj_section in config_obj.sections():
+        if CONST.CFG_MANDATORY in config_obj.options(config_obj_section):
+            has_valid_section = True
+            break
+    return has_valid_section
+
+
+#def option_has_default_value(config_option: configparser.ConfigParser(), section: str) -> bool:
+#
+#~ local option that doesn't exist in defaults section
+#+ local option that overrides a default
+#* global option
+
+def validate_config_sections(config_obj: configparser.ConfigParser()) -> None:
+    for section in config_obj.sections():
+        log.debug(f"Loading config '[{section}]' ...")
+        for key in config_obj[section]:
+            # log.debug(config_obj.has_option(section, key))
+            is_local_option = True if config_obj.has_option(section, key) else False
+            log.debug(f"""    {key}{"/" if is_local_option else ".."} = {config_obj[section][key]}""")
+
+
+validate_config_defaults(config)
+if config_has_valid_section(config):
+    validate_config_sections(config)
+else:
+    log.error(f"No valid config section found. A valid config section has at least the '{CONST.CFG_MANDATORY}' "
+              f"option set. Exiting 2 ...")
+    sys.exit(2)
+
+
+# https://stackoverflow.com/a/2451872
+quit()
+
 # This is a sample Python script.
 
 # Press Umschalt+F10 to execute it or replace it with your code.
diff --git a/requirements.in b/requirements.in
new file mode 100644
index 0000000..c94be38
--- /dev/null
+++ b/requirements.in
@@ -0,0 +1 @@
+rich
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..a3f3a84
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,12 @@
+#
+# This file is autogenerated by pip-compile with python 3.10
+# To update, run:
+#
+#    pip-compile
+#
+commonmark==0.9.1
+    # via rich
+pygments==2.11.2
+    # via rich
+rich==12.0.0
+    # via -r requirements.in