USE [Elyse_DB]
GO
/****** Object:  StoredProcedure [controlling].[usp_DEL_people_list]    Script Date: Sat 05-09-2026 7:01:55 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:		Silkwood Software
-- Create date: 08-01-2024
-- Description:	Initial creation
-- Deletes a record from people.people_list 
-- Input is a people list id and a person id.  
-- Output is a status message, transaction status.  
/*
COPYRIGHT NOTICE
This database schema and stored procedures are protected by copyright.
Copyright.  Silkwood Software Pty. Ltd. 2023
*/
-- =============================================
/**
* Deletes a record from people.people_list 
* 
* **Acceptable Inputs:**
*
* - @peoplelistid bigint: Must be a non-null and non-empty valid identifier from the people_list_names table.
* - @sid bigint: Must be a valid id from the sid list table
*
*
* **Return Values:**
*
* - @message nvarchar(1000) OUTPUT: Descriptive status message of the procedure's execution.
* - @transaction_status nchar(50) OUTPUT: Indicates the transaction status ('Good', 'Bad', or default 'Transaction not attempted').
*
* **Error and Exception Conditions:**
*
* - User Role Validation Fail: Returns 'No Permission' message.
* - Data Validation Fail: Returns messages for invalid input data.
*
* **Side Effects:**
*
* - Deletes a record from people.people_lists 
*
* **Preconditions:**
*
* - The user executing the procedure must have the 'Controller' role.
*
* **Postconditions:**
* - The procedure returns status messages indicating the outcome of the operation.
*
*/
-- =========================================================
CREATE PROCEDURE [controlling].[usp_DEL_people_list] 

         
	 @peoplelistid bigint             = NULL,
	 @sidid bigint                    = NULL, 
	 @app_reference nvarchar(1000)    = '',    -- Optional
	 @notes nvarchar(1000)            = '',    -- Optional
	 @message nvarchar(1000)          = '' OUTPUT,
	 @transaction_status nvarchar(50) = NULL OUTPUT


AS
BEGIN
	-- SET NOCOUNT ON added to prevent extra result sets from
	-- interfering with SELECT statements.
	SET NOCOUNT ON;

  DECLARE 
        @tempmessage nvarchar(300)           = '',
		@tempuserauth_status nchar(10)       = '',
	    @connectedusersid varbinary(100)     = SUSER_SID(ORIGINAL_LOGIN()),   -- The SID of the connected user
	    @username nvarchar(150)              = ORIGINAL_LOGIN(),     -- The username 
	    @validationmessage nvarchar(200)     = '', -- Communicates that the transaction failed due to data validation
		@userauthentication_status nchar(10) = 'Fail', -- The outcome of the authentication check of the user 
		@tempvalidationstatus nchar(10)      = '',
		@transaction_ready nchar(10)         = 'Ready',
		@data_validation_status nchar(10)    = 'Pass';

  -- Parameters which have been initialised at declaration but not explicitly set might be output as null to calling functions.
  SET @transaction_status = 'Transaction not attempted';  

	 
  -- Connected user authentication
  -- Authenticate the connected user for the role
  EXEC [internal].[usp_AUTHENTICATE_user_role] 
        @role_to_check = 'Controller',
		@user_authentication_result = @userauthentication_status OUTPUT;
  IF @userauthentication_status = 'Fail'
    BEGIN  -- The user does not have permission for this action
		SET @transaction_ready      = 'Fail';
	    EXEC internal.usp_SEL_message 
            @message_id   = 'NoPermission', 
			@message_text = @tempmessage OUTPUT;
	    IF (@tempmessage IS NOT NULL) 
  	       SET @message = CONCAT(@message, ' | ', ISNULL(@username, ''), '  ', @tempmessage);
	    ELSE 
		   SET  @message = CONCAT_WS(' | ', @message,'A database level message error occurred on NoPermission.');
	END

  IF @userauthentication_status = 'Pass' -- Don't do anything if the user is not authorised.
    BEGIN
	  -- Data validation

	  -- Check the people list id
	  IF @peoplelistid = 0
	     SET @peoplelistid = NULL;
      IF @peoplelistid IS NULL
			 BEGIN
			   SET @data_validation_status = 'Fail';
			   SET @transaction_ready      = 'Fail';
			   EXEC internal.usp_SEL_message 
					@message_id = 'NoPeopleListID', 
					@message_text = @tempmessage OUTPUT;
  			   IF (@tempmessage IS NOT NULL) 
				  SET @message = CONCAT_WS(' | ', @message, @tempmessage);
			   ELSE 
				  SET @message = CONCAT_WS(' | ', @message, 'A database level message error occurred on NoPeopleListID.');
			 END


	 -- Check the sid id
		  IF @sidid = 0
			 SET @sidid = NULL;
		  -- Check record id has been supplied
		  IF @sidid IS NULL
			 BEGIN
			   SET @data_validation_status = 'Fail';
			   SET @transaction_ready      = 'Fail';
			   EXEC internal.usp_SEL_message 
					@message_id = 'NoSidId', 
					@message_text = @tempmessage OUTPUT;
  			   IF (@tempmessage IS NOT NULL) 
				  SET @message = CONCAT_WS(' | ', @message, @tempmessage);
			   ELSE 
				  SET @message = CONCAT_WS(' | ', @message, 'A database level message error occurred on NoSidId.');
			 END



	 -- Check if a matching record exists.  Only perform this check if both input values have been supplied. 
	 IF @data_validation_status = 'Pass'
	    AND NOT EXISTS 
				(SELECT pl.people_list_id
				   FROM people.people_lists AS pl
				  WHERE pl.people_list_id = @peoplelistid
						AND pl.sid_id  = @sidid)
		BEGIN -- Record doesn't exist
			SET @data_validation_status = 'Fail';
			SET @transaction_ready      = 'Fail';
			EXEC internal.usp_SEL_message
					@message_id = 'NotExist',
					@message_text = @tempmessage OUTPUT;
  					IF (@tempmessage IS NOT NULL) 
					SET @message = CONCAT_WS(' | ', @message, @tempmessage);
				ELSE 
					SET @message = CONCAT_WS(' | ', @message, 'A database level message error occurred on NotExist.');
		END

		-- Referential constraint error messaging is handled in the CATCH block. 


	  -- Output the data validation status failed message
	  IF @data_validation_status = 'Fail'
		BEGIN
		  EXEC internal.usp_SEL_message 
			   @message_id   = 'FailedDataValidation', 
			   @message_text = @tempmessage OUTPUT;
		  IF (@tempmessage IS NOT NULL) 
  		    SET @message = CONCAT_WS(' | ', @message, @tempmessage);
		  ELSE 
		    SET @message = CONCAT_WS(' | ', @message, 'A database level message error occurred on FailedDataValidation');
		END
  -- End data validation


-- Execute the delete query

  IF @transaction_ready = 'Ready'
	BEGIN
	  BEGIN TRY
	  BEGIN TRANSACTION;
	  INSERT INTO user_restr.user_privilege_revoke_log -- Create an audit log entry
	              (privilege, privilege_name, sid_id, username, granted_on, granted_by, revoked_by)
	       VALUES ('People List',
		          (SELECT name FROM people.people_list_names
				                   WHERE    people_list_id 
								         = @peoplelistid),
		          @sidid,
		          (SELECT username FROM user_restr.sid_list
				                  WHERE         sid_id 
										= @sidid),
		          (SELECT created FROM people.people_lists
								 WHERE    people_list_id 
								       = @peoplelistid
								  	   AND sid_id 
									    = @sidid),
		          (SELECT granted_by FROM people.people_lists
								    WHERE    people_list_id 
								          = @peoplelistid
								  	      AND sid_id 
									       = @sidid),
				  @username)

	     DELETE FROM people.people_lists
		  WHERE people_list_id = @peoplelistid
		        AND sid_id = @sidid;

         -- Write to the privilege log --

		 INSERT INTO user_restr.user_privilege_log
		             (privilege_type,                  privilege_name,           sid_id,      username, action_type, 
					 created_by_sid_id, valid_from, valid_until, notes, app_reference)
			  VALUES ('People List to User Link', 
			           (SELECT name
			              FROM people.people_list_names
						 WHERE people_list_id = @peoplelistid),         
					   @sidid, 
					   (SELECT username
		                  FROM user_restr.sid_list
						 WHERE sid_id = @sidid), 
					   'Revoke',
			         (SELECT sid_id
		                FROM user_restr.sid_list
					   WHERE sid = @connectedusersid), 
					   NULL, NULL, @notes, @app_reference)

		COMMIT TRANSACTION;
         EXEC internal.usp_SEL_message 
              @message_id   = 'Success', 
              @message_text = @tempmessage OUTPUT;
  	     IF (@tempmessage IS NOT NULL) 
  		    SET @message = CONCAT_WS(' | ', @message, @tempmessage);
		  ELSE 
		    SET @message = CONCAT_WS(' | ', @message, 'A database level message error occurred on Success');
		 SET @transaction_status = 'Good';
   	  END TRY
	  BEGIN CATCH

	     IF XACT_STATE() <> 0
            ROLLBACK TRANSACTION;
	  	 
	     SET @transaction_status = 'Bad';
         EXEC internal.usp_SEL_message 
              @message_id   = 'DeleteError', 
              @message_text = @tempmessage OUTPUT;
		 IF (@tempmessage IS NOT NULL) 
		    SET @message = CONCAT(@message, ' | ', @tempmessage, ' | ', 
		    CONVERT(nvarchar(10),ERROR_NUMBER()), ' | ', ERROR_MESSAGE());
		 ELSE 
		    SET @message = CONCAT_WS(' | ', @message, 'A database level message error occurred on DeleteError');
	  END CATCH
    END


 END -- End IF @userauthentication = 'Pass'

END
GO