Set up a basic daemon with node monitoring (#126)

The node monitoring is WIP.

daemon/Makefile

@@ -0,0 +1,143 @@
+## Haiku Generic Makefile v2.6 ##
+
+## Fill in this file to specify the project being created, and the referenced
+## Makefile-Engine will do all of the hard work for you. This handles any
+## architecture of Haiku.
+##
+## For more information, see:
+## file:///system/develop/documentation/makefile-engine.html
+
+# The name of the binary.
+NAME = CalendarDaemon
+
+# The type of binary, must be one of:
+#	APP:	Application
+#	SHARED:	Shared library or add-on
+#	STATIC:	Static library archive
+#	DRIVER: Kernel driver
+TYPE = APP
+
+# If you plan to use localization, specify the application's MIME signature.
+APP_MIME_SIG = application/x-vnd.CalendarDaemon
+
+#	The following lines tell Pe and Eddie where the SRCS, RDEFS, and RSRCS are
+#	so that Pe and Eddie can fill them in for you.
+#%{
+# @src->@
+
+#	Specify the source files to use. Full paths or paths relative to the
+#	Makefile can be included. All files, regardless of directory, will have
+#	their object files created in the common object directory. Note that this
+#	means this Makefile will not work correctly if two source files with the
+#	same name (source.c or source.cpp) are included from different directories.
+#	Also note that spaces in folder names do not work well with this Makefile.
+SRCS = \
+	src/CalendarDaemon.cpp \
+	../main/src/model/Event.cpp \
+	../main/src/model/Category.cpp \
+	../main/src/utils/ColorConverter.cpp \
+	../main/src/utils/ResourceLoader.cpp \
+	../main/src/db/QueryDBManager.cpp
+
+
+#	Specify the resource definition files to use. Full or relative paths can be
+#	used.
+RDEFS = src/CalendarDaemon.rdef
+
+
+#	Specify the resource files to use. Full or relative paths can be used.
+#	Both RDEFS and RSRCS can be utilized in the same Makefile.
+RSRCS =
+
+
+# End Pe/Eddie support.
+# @<-src@
+#%}
+
+#%}
+
+#	Specify libraries to link against.
+#	There are two acceptable forms of library specifications:
+#	-	if your library follows the naming pattern of libXXX.so or libXXX.a,
+#		you can simply specify XXX for the library. (e.g. the entry for
+#		"libtracker.so" would be "tracker")
+#
+#	-	for GCC-independent linking of standard C++ libraries, you can use
+#		$(STDCPPLIBS) instead of the raw "stdc++[.r4] [supc++]" library names.
+#
+#	- 	if your library does not follow the standard library naming scheme,
+#		you need to specify the path to the library and it's name.
+#		(e.g. for mylib.a, specify "mylib.a" or "path/mylib.a")
+LIBS = be localestub $(STDCPPLIBS)
+
+#	Specify additional paths to directories following the standard libXXX.so
+#	or libXXX.a naming scheme. You can specify full paths or paths relative
+#	to the Makefile. The paths included are not parsed recursively, so
+#	include all of the paths where libraries must be found. Directories where
+#	source files were specified are	automatically included.
+LIBPATHS =
+
+#	Additional paths to look for system headers. These use the form
+#	"#include <header>". Directories that contain the files in SRCS are
+#	NOT auto-included here.
+SYSTEM_INCLUDE_PATHS = \
+	$(shell findpaths -e B_FIND_PATH_HEADERS_DIRECTORY private/support)
+
+#	Additional paths paths to look for local headers. These use the form
+#	#include "header". Directories that contain the files in SRCS are
+#	automatically included.
+LOCAL_INCLUDE_PATHS =
+
+#	Specify the level of optimization that you want. Specify either NONE (O0),
+#	SOME (O1), FULL (O3), or leave blank (for the default optimization level).
+OPTIMIZE := FULL
+
+# 	Specify the codes for languages you are going to support in this
+# 	application. The default "en" one must be provided too. "make catkeys"
+# 	will recreate only the "locales/en.catkeys" file. Use it as a template
+# 	for creating catkeys for other languages. All localization files must be
+# 	placed in the "locales" subdirectory.
+LOCALES = en
+
+#	Specify all the preprocessor symbols to be defined. The symbols will not
+#	have their values set automatically; you must supply the value (if any) to
+#	use. For example, setting DEFINES to "DEBUG=1" will cause the compiler
+#	option "-DDEBUG=1" to be used. Setting DEFINES to "DEBUG" would pass
+#	"-DDEBUG" on the compiler's command line.
+DEFINES =
+
+#	Specify the warning level. Either NONE (suppress all warnings),
+#	ALL (enable all warnings), or leave blank (enable default warnings).
+WARNINGS =
+
+#	With image symbols, stack crawls in the debugger are meaningful.
+#	If set to "TRUE", symbols will be created.
+SYMBOLS :=
+
+#	Includes debug information, which allows the binary to be debugged easily.
+#	If set to "TRUE", debug info will be created.
+DEBUGGER :=
+
+#	Specify any additional compiler flags to be used.
+COMPILER_FLAGS =
+
+#	Specify any additional linker flags to be used.
+LINKER_FLAGS =
+
+#	Specify the version of this binary. Example:
+#		-app 3 4 0 d 0 -short 340 -long "340 "`echo -n -e '\302\251'`"1999 GNU GPL"
+#	This may also be specified in a resource.
+APP_VERSION :=
+
+#	(Only used when "TYPE" is "DRIVER"). Specify the desired driver install
+#	location in the /dev hierarchy. Example:
+#		DRIVER_PATH = video/usb
+#	will instruct the "driverinstall" rule to place a symlink to your driver's
+#	binary in ~/add-ons/kernel/drivers/dev/video/usb, so that your driver will
+#	appear at /dev/video/usb when loaded. The default is "misc".
+DRIVER_PATH =
+
+## Include the Makefile-Engine
+DEVEL_DIRECTORY := \
+	$(shell findpaths -r "makefile_engine" B_FIND_PATH_DEVELOP_DIRECTORY)
+include $(DEVEL_DIRECTORY)/etc/makefile-engine

daemon/src/CalendarDaemon.cpp

@@ -1,11 +1,108 @@
 /*
- * Copyright 2018, Harshit Sharma <[email protected]>
+ * Copyright 2022, Harshit Sharma, [email protected]
  * All rights reserved. Distributed under the terms of the MIT license.
  */
 
+#include "CalendarDaemon.h"
+
+#include <iostream>
+
+#include <Directory.h>
+#include <FindDirectory.h>
+#include <NodeMonitor.h>
+#include <Path.h>
+#include <VolumeRoster.h>
+
+#define EVENT_DIRECTORY "config/settings/Calendar/events"
+
+const char* kApplicationSignature = "application/x-vnd.CalendarDaemon";
+
+#undef B_TRANSLATION_CONTEXT
+#define B_TRANSLATION_CONTEXT "Daemon"
+
 
 int main()
 {
+	CalendarDaemon app;
+	app.Run();
+
 	return 0;
 }
 
+
+/*! 
+	CalendarDaemon Class Definitions
+*/
+
+
+CalendarDaemon::CalendarDaemon()
+	:
+	BApplication(kApplicationSignature)
+{
+	std::cout << "Creating Daemon..." << std::endl;
+
+	BVolumeRoster volRoster;
+	volRoster.GetBootVolume(&fQueryVolume);
+
+	BPath homeDir;
+	find_directory(B_USER_DIRECTORY, &homeDir);
+	fEventDir = homeDir.Path();
+	fEventDir << "/" << EVENT_DIRECTORY;
+
+	BDirectory directory(fEventDir.String());
+
+	if (directory.InitCheck() == B_OK) {
+		node_ref nodeRef;
+		directory.GetNodeRef(&nodeRef);
+		watch_node(&nodeRef, B_WATCH_DIRECTORY, be_app_messenger);
+	} else
+		std::cout << "Events Directory not found!!" << std::endl;
+}
+
+
+CalendarDaemon::~CalendarDaemon()
+{
+	std::cout << "Stopping Daemon, Good Bye! ;)" << std::endl;
+	stop_watching(be_app_messenger);
+}
+
+
+void
+CalendarDaemon::MessageReceived(BMessage *message)
+{
+	switch (message->what) {
+		case B_NODE_MONITOR:
+		{
+			std::cout << "\nNode Monitor Message Received!" << std::endl;
+			int32 opCode;
+
+			if (message->FindInt32("opcode", &opCode) == B_OK) {
+				switch (opCode) {
+					case B_ENTRY_CREATED:
+						std::cout << "New Event Created!" << std::endl;
+						break;
+					case B_ENTRY_REMOVED:
+					case B_ENTRY_MOVED:
+						std::cout << "An Event Removed!" << std::endl;
+						break;
+				}
+			}
+			else
+				std::cout << "Op Code not found!" << std::endl;
+			break;
+		}
+		case B_QUIT_REQUESTED:
+			QuitRequested();
+			break;
+		default:
+			BApplication::MessageReceived(message);
+			break;
+	}
+}
+
+
+bool
+CalendarDaemon::QuitRequested()
+{
+	return true;
+}

daemon/src/CalendarDaemon.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2022, Harshit Sharma <[email protected]>
+ * All rights reserved. Distributed under the terms of the MIT license.
+ */
+
+#ifndef CALENDAR_DAEMON_H
+#define CALENDAR_DAEMON_H
+
+#include <Application.h>
+#include <OS.h>
+#include <Volume.h>
+
+
+/*!
+	CalendarDaemon Class Declaration
+*/
+
+
+class CalendarDaemon : public BApplication
+{
+public:
+		CalendarDaemon();
+		~CalendarDaemon();
+
+	void			MessageReceived(BMessage* message);
+	bool			QuitRequested();
+
+private:
+
+	BString				fEventDir;
+	BVolume				fQueryVolume;
+};
+
+#endif

daemon/src/CalendarDaemon.rdef

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+resource app_signature "application/x-vnd.CalendarDaemon";
+
+resource app_version {
+	short_info = "Calendar daemon",
+	long_info = "Notifies about upcoming events scheduled with Calendar"
+};
+
+resource app_flags B_SINGLE_LAUNCH | B_BACKGROUND_APP;
+
+resource file_types message {
+	"types" = "application/x-calendar-event"
+};