if (not (group exist "0001_folder1_folder2_folder3")) {
	group add "0001_folder1_folder2_folder3";
};

script merge "folder1.folder2.folder3.step_1_source_connect.exe" true 5
  (param
  )
  "Connect to the source"
{

	# CONFIGURATION ;
	-> "[CONF_NAME_OF_THE_FLOW]" "name_of_the_flow";
	-> "[CONF_SOURCE_CM]" "demo_cm";

	# INITIALIZATION ;
	-> "[FLOW_PID]" [PID];
	
	# HANDLE ;
	try {
	
		# Flow initialization;
		stack flow_init [FLOW_PID] [CONF_NAME_OF_THE_FLOW] "{}";
		stack flow_step [FLOW_PID] 1 "source_connect...";

		ssh connect "session_remote" {cm get [CONF_SOURCE_CM];};
		
		#Step 1 is valid;
		stack flow_step [FLOW_PID] 1 "source_connect_ok";
		
		include "folder1.folder2.folder3.step_2_extract.exe";
	
	} {

		try {ssh disconnect "session_remote";} {} "[err]";

		#Step 1 is not valid;
		stack flow_step [FLOW_PID] 1 "source_connect_KO";
		
		# Give the error to the stack and stop the process;
		exception (1) ([global_err]);
	
	} "[global_err]";
	
} "Return nothing";
if (not (group is granted script "folder1.folder2.folder3.step_1_source_connect.exe" "0001_folder1_folder2_folder3")) {
	group grant script "folder1.folder2.folder3.step_1_source_connect.exe" "0001_folder1_folder2_folder3";
};

script merge "folder1.folder2.folder3.step_2_extract.exe" true 1
  (param
  )
  "Extract files from the source"
{

	# CONFIGURATION ;
	-> "[CONF_DIR_SOURCE]" "tmp/source";
	-> "[CONF_SOURCE_FILTER]" "*txt";
	
	# HANDLE ;
	try {

		# Mark the flow as step 2;
		stack flow_step [FLOW_PID] 2 "extract...";

		# Create the local directory PID;
		file mkdir (concat "home/" [FLOW_PID]);

		# Get files into PID directory;
		log write (concat "Get files from '" [CONF_DIR_SOURCE] "/" [CONF_SOURCE_FILTER] "'.") OK null null;
		
		json load "valid_files" "[]";
		file create "tmp/0001_folder1_folder2_folder3.csv" (concat "FILENAME" [_n_] (ssh execute_1_cmd "session_remote" (concat "ls " [CONF_DIR_SOURCE] "/" [CONF_SOURCE_FILTER])));
		csv parse "T" "tmp/0001_folder1_folder2_folder3.csv" "," "'" "FILENAME" {
			json load "row" "{}";
			json iobject "row" / "name" [T_FILENAME] STR;
			json iarray "valid_files" / (json doc "row") OBJ;
		};
		
		json parse_array "valid_files" "/" "obj" {

			-> "[filename]" (json select "obj" /name);
			ssh scp from "session_remote" (concat [CONF_DIR_SOURCE] "/" [filename]) (concat "home/" [FLOW_PID] "/" [filename]);
			log write (concat "Get file 'home/" [FLOW_PID] "/" [filename] "'.") OK null null;
		
		};

		# Delete source file;
		json parse_array "valid_files" "/" "obj" {

			-> "[filename]" (json select "obj" /name);
			ssh execute_1_cmd "session_remote" (concat "rm " [CONF_DIR_SOURCE] "/" [filename]);
			log write (concat "Remove source file '" [CONF_DIR_SOURCE] "/" [filename] "'.") OK null null;

		};

		file delete "tmp/0001_folder1_folder2_folder3.csv";
		ssh disconnect "session_remote";
	
	} {

		try {file delete "tmp/0001_folder1_folder2_folder3.csv";} {} "[err]";
		try {ssh disconnect "session_remote";} {} "[err]";

		#Step 2 is not valid;
		stack flow_step [FLOW_PID] 2 "extract_KO";
		
		# Give the error to the stack and stop the process;
		exception (1) ([global_err]);
	
	} "[global_err]";
	
	log write (concat (json count "valid_files" /) " file(s) to transform.") OK null null;

	if (> (json count "valid_files" /) 0) {

		#Step 2 is valid;
		stack flow_step [FLOW_PID] 2 (concat "extract_ok_" (json count "valid_files" /) "_files");
		
		json parse_array "valid_files" "/" "obj" {

			-> "[filename]" (json select "obj" /name);
		
			stack (date now) "folder1.folder2.folder3.step_3_transform.exe" "[FLOW_PID]" [FLOW_PID] "[filename]" [filename];
	
		};
		
	} {

		#Step 2 is valid;
		stack flow_step [FLOW_PID] 2 "extract_ok_zero_file";
		
		# No file into the directory;
		file delete (concat "home/" [FLOW_PID]);

	};

} "Return nothing";
if (not (group is granted script "folder1.folder2.folder3.step_2_extract.exe" "0001_folder1_folder2_folder3")) {
	group grant script "folder1.folder2.folder3.step_2_extract.exe" "0001_folder1_folder2_folder3";
};

script merge "folder1.folder2.folder3.step_3_transform.exe" true 1
  (param
  	(var "[FLOW_PID]" {true} "The flow PID" is_null:true is_empty:true "1")
  	(var "[filename]" {true} "The filename" is_null:true is_empty:true "file.csv")
  )
  "Transform the file"
{
	
	# HANDLE ;
	try {

		# Mark the flow as step 3;
		stack flow_step [FLOW_PID] 3 "transform...";

		# SQL: don't use step 3;
		log write "SQL: don't use step 3" OK null null;

		#Step 3 is valid;
		stack flow_step [FLOW_PID] 3 "transform_ok";

		stack (date now) "folder1.folder2.folder3.step_4_destination_connect.exe" "[FLOW_PID]" [FLOW_PID] "[filename]" [filename];
		
	} {

		#Step 5 is not valid;
		stack flow_step [FLOW_PID] 5 "transform_and_load_KO";
		
		# Give the error to the stack and stop the process;
		exception (1) ([global_err]);
	
	} "[global_err]";

} "Return nothing";
if (not (group is granted script "folder1.folder2.folder3.step_3_transform.exe" "0001_folder1_folder2_folder3")) {
	group grant script "folder1.folder2.folder3.step_3_transform.exe" "0001_folder1_folder2_folder3";
};

script merge "folder1.folder2.folder3.step_4_destination_connect.exe" true 5
  (param
  	(var "[FLOW_PID]" {true} "The flow PID" is_null:true is_empty:true "1")
  	(var "[filename]" {true} "The filename" is_null:true is_empty:true "file.xxx")
  )
  "Connect to the destination"
{

	# CONFIGURATION ;
	-> "[CONF_DESTINATION_CM_SQL]" "MENTDB";
	
	# HANDLE ;
	try {
	
		# Flow initialization;
		stack flow_step [FLOW_PID] 4 "destination_connect...";

		sql connect "destination_sess" {cm get [CONF_DESTINATION_CM_SQL];};
		sql auto_commit "destination_sess" false;
		
		#Step 4 is valid;
		stack flow_step [FLOW_PID] 4 "destination_connect_ok";
		
		include "folder1.folder2.folder3.step_5_load.exe";
	
	} {

		try {sql disconnect "destination_sess";} {} "[err]";

		#Step 4 is not valid;
		stack flow_step [FLOW_PID] 4 "destination_connect_KO";
		
		# Give the error to the stack and stop the process;
		exception (1) ([global_err]);
	
	} "[global_err]";
	
} "Return nothing";
if (not (group is granted script "folder1.folder2.folder3.step_4_destination_connect.exe" "0001_folder1_folder2_folder3")) {
	group grant script "folder1.folder2.folder3.step_4_destination_connect.exe" "0001_folder1_folder2_folder3";
};

script merge "folder1.folder2.folder3.step_5_load.exe" true 1
  (param
  )
  "Load file to the destination"
{

	# CONFIGURATION ;
	-> "[CONF_DESTINATION_CM_SQL]" "MENTDB";
	-> "[CONF_DESTINATION_COMMIT_BY_NB_ROW]" 5000;
	
	# HANDLE ;
	try {

		# Mark the flow as step 5;
		stack flow_step [FLOW_PID] 5 "load...";
		
		log write (concat "Integrate the file 'home/" [FLOW_PID] "/" [filename] "' into the database '" [CONF_DESTINATION_CM_SQL] "'...") OK null null;

		file reader_open "r1_source" (concat "home/" [FLOW_PID] "/" [filename]) TEXT "utf-8";
	
		#Parse the file;
		-> "[index]" 0;
		-> "[index_all]" 0;
		while (is not null (-> "[line_source]" (file reader_get_line "r1_source"));) {
	
			-> "[T_A]" (atom get [line_source] 1 "|");
			-> "[T_B]" (atom get [line_source] 2 "|");
			-> "[T_C]" (atom get [line_source] 3 "|");

			sql dml "destination_sess" (concat 
				"INSERT INTO `test` (
					`A`,
					`B`,
					`C`
				) VALUES (
					" (sql encode [T_A]) " ,
					" (sql encode [T_B]) " ,
					" (sql encode [T_C]) "
				);"
			);

			++ "[index]";
			++ "[index_all]";

			if (== [index] [CONF_DESTINATION_COMMIT_BY_NB_ROW]) {
				-> "[index]" 0;
				sql commit "destination_sess";
				log write (concat "Current row >>> " [index_all]) OK null null;
			};
	
		};
	
		#Close the reader;
		file reader_close "r1_source";

		sql commit "destination_sess";

		sql disconnect "destination_sess";
		
		log write (concat "Integrated.") OK null null;
		
		#Step 5 is valid;
		stack flow_step [FLOW_PID] 5 "load_ok";
		
	} {

		try {sql rollback "destination_sess";} {} "[err]";
		try {sql disconnect "destination_sess";} {} "[err]";
		try {file reader_close "r1_source";} {} "[sub_err]";

		#Step 5 is not valid;
		stack flow_step [FLOW_PID] 5 "load_KO";
		
		# Give the error to the stack and stop the process;
		exception (1) ([global_err]);
	
	} "[global_err]";

} "Return nothing";
if (not (group is granted script "folder1.folder2.folder3.step_5_load.exe" "0001_folder1_folder2_folder3")) {
	group grant script "folder1.folder2.folder3.step_5_load.exe" "0001_folder1_folder2_folder3";
};