FileManager:
 - only accepts const strings as no modification should occur.

AlertManager:
 - Added WriteLogs, write the given string to the parameter log file.
   The input is considered as a log line, add new line at the end (\n).
 - Added REDISAddLogs, add given string to given redis list
   and publish it to given redis channel.
   If either the first or the other is not given,
   only apply to the given one.

TODO:
 - implement in the filters
 - automated  testing
 - flogs removal
- Vulture integration (non-blocking)

Rewrote parts of the FileManager to be mor C++ friendly.
Exceptions should not be used as error return / flags!

Add operator bool to verify current state of the file the extensive way.

Core:
AlertManager is now fully usable.
The Core method for loading the associated configuration are imlemented.
The new configuration fields are:
 - 'log_file_path': path to the log file dedicated to alerts
 - 'redis_socket_path': path to the redis UNIX socket to send alert to
 - 'alert_redis_list_name': name of the alert list in redis
 - 'alert_redis_channel_name': name of redis channel to publish alert to

If the alert configuration is missing or wrong,
it is not applied.
If the alert configuration is partialy correct,
apply as much as possible.
In both cases a warning is logged.

DARWIN_RAISE_ALERT(str) macro makes filter code easier to read.
(AlertManager.hpp)

CMake:
Added the redis dependencie to the CMakeLists.txt because it will soon
be part of all the filters through the Alert Manager.

Added the required toolkit parts to the core sources.

Added DARWIN_LIBRARIES var to remove duplicata and
avoid core libraries mistake.

fhostlookup:
Migration to the Alert Manager done and hand tested.

NOT TESTED!

All the filters are migrated to use the AlertManager.

All the filters compile on linux.

Upadted configurations exaple to match the new alerting workflow.

Added missing DARWIN_RAISE_ALERT to fdga.

Added ftest to enable easier testing of the core functions.
This filter is not compiled by default but is mandatory for tests.

Tests are generated to cover all the possible cases.
TODO: Run the tests.

Fix log in ftanomaly tests.

Fix TEST search in CMakeList.
TEST being a cmake function the word needs quotes around.

Removed useless files.

Fix multiple errors in AlertManager testing.

Added missing certitude pushback in TestTask.

Removed duplicate alert in file in ftanomaly.

Replaced some double quotes by simple quotes in order
to respect the json format of the logs.

Now the alert file rotation is handled by the SIGHUP or SIGUSR1 signal.

Added AlertManager file rotation automated test.

Force reopen is now possible with our FiLeManager.
File opening / reopening is now done under mutex lock to
prevent writing while opening / closing the file.

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Co-Authored-By: frikilax <[email protected]>

Added a slight delay (1 millisecond) before retrying to write the alert.