--This function creates a RegionsOfInterest string from the TestSetupROIs and ROIPeriodChannels tables.
--It is used by sp_TestSetupsGet when Version 91 client is using a Version 92 or later database.
CREATE FUNCTION [dbo].[foo_RegionsOfInterestString]
(
	@TestSetupId int
)
RETURNS nvarchar(MAX)
AS
BEGIN
--DECLARE @TestSetupId int = 1 --To debug, uncomment out this line and set to the TestSetupId desired.  Also, comment out the lines above here and the RETURN and END at the bottom.

	DECLARE @TestSetupROIId TABLE (testSetupROIId int)
	DECLARE @ChannelNames TABLE (idx smallint Primary Key IDENTITY(1,1), 
		testSetupId int,
		suffix nvarchar(50),
		roiStart float,
		roiEnd float,
		isEnabled bit,
		isDefault bit,
		channelName nvarchar(4000))
	DECLARE @i int
	DECLARE @numrows int
	DECLARE @ReturnString nvarchar(MAX)
	DECLARE @CurrentSuffix nvarchar(50) = ' ' -- So it's not NULL to start
	DECLARE @NewSuffix nvarchar(50)
	DECLARE @NewTestSetupId int

	INSERT INTO @TestSetupROIId ([testSetupROIId]) (SELECT TestSetupROIId FROM TestSetupROIs WHERE TestSetupId = @TestSetupId)
--DECLARE @TSRI XML = (SELECT * FROM @TestSetupROIId FOR XML AUTO) -- For debugging

	INSERT INTO @ChannelNames (testSetupId, suffix, roiStart, roiEnd, isEnabled, isDefault, channelName) (SELECT TestSetupId, Suffix, ROIStart, ROIEnd, IsEnabled, IsDefault, ChannelName FROM TestSetupROIs r INNER JOIN ROIPeriodChannels c ON r.TestSetupROIId = c.TestSetupROIId WHERE r.TestSetupId = @TestSetupId)
--DECLARE @CN XML = (SELECT * FROM @ChannelNames FOR XML AUTO) -- For debugging

	SET @ReturnString = CONCAT (@ReturnString, '[')

	SET @i = 1
	SET @numrows = (SELECT COUNT(*) FROM @ChannelNames)
	IF @numrows = 0
	BEGIN
		-- Since there are no channels in the ROIPeriodChannels table, we only need to look in the TestSetupROIs table
		-- for the Start and End values.  This is the case where there is only one ROI, which includes all channels.
		SET @ReturnString = CONCAT (@ReturnString, '{')

		SET @ReturnString = CONCAT (@ReturnString, '"Suffix":')
		SET @ReturnString = CONCAT (@ReturnString, '"')
		SET @ReturnString = CONCAT (@ReturnString, '"')

		SET @ReturnString = CONCAT (@ReturnString, ',')
		SET @ReturnString = CONCAT (@ReturnString, '"Start":')
		SET @ReturnString = CONCAT (@ReturnString, (SELECT ROIStart FROM TestSetupROIs WHERE TestSetupId = @TestSetupId))

		SET @ReturnString = CONCAT (@ReturnString, ',')
		SET @ReturnString = CONCAT (@ReturnString, '"End":')
		SET @ReturnString = CONCAT (@ReturnString, (SELECT ROIEnd FROM TestSetupROIs WHERE TestSetupId = @TestSetupId))

		SET @ReturnString = CONCAT (@ReturnString, ',')
		SET @ReturnString = CONCAT (@ReturnString, '"IsEnabled":')
		SET @ReturnString = CONCAT (@ReturnString, (SELECT CASE WHEN isEnabled = 1 THEN 'true' ELSE 'false' END FROM TestSetupROIs WHERE TestSetupId = @TestSetupId))

		SET @ReturnString = CONCAT (@ReturnString, ',')
		SET @ReturnString = CONCAT (@ReturnString, '"IsDefault":')
		SET @ReturnString = CONCAT (@ReturnString, (SELECT CASE WHEN isDefault = 1 THEN 'true' ELSE 'false' END FROM TestSetupROIs WHERE TestSetupId = @TestSetupId))

		SET @ReturnString = CONCAT (@ReturnString, ',')
		SET @ReturnString = CONCAT (@ReturnString, '"ChannelNames":')
		SET @ReturnString = CONCAT (@ReturnString, '[')
		SET @ReturnString = CONCAT (@ReturnString, ']}')
		SET @ReturnString = CONCAT (@ReturnString, ']')
	END
	ELSE
	BEGIN
		WHILE (@i <= (SELECT MAX(idx) FROM @ChannelNames))
		BEGIN
			SET @NewSuffix = (SELECT Suffix FROM @ChannelNames WHERE idx = @i)
			IF (@NewSuffix <> @CurrentSuffix)
			BEGIN
				SET @CurrentSuffix = @NewSuffix

				SET @ReturnString = CONCAT (@ReturnString, '{')

				SET @ReturnString = CONCAT (@ReturnString, '"Suffix":')
				SET @ReturnString = CONCAT (@ReturnString, '"')
				SET @ReturnString = CONCAT (@ReturnString, (SELECT Suffix FROM @ChannelNames WHERE idx = @i))
				SET @ReturnString = CONCAT (@ReturnString, '"')

				SET @ReturnString = CONCAT (@ReturnString, ',')
				SET @ReturnString = CONCAT (@ReturnString, '"Start":')
				SET @ReturnString = CONCAT (@ReturnString, (SELECT roiStart FROM @ChannelNames WHERE idx = @i))

				SET @ReturnString = CONCAT (@ReturnString, ',')
				SET @ReturnString = CONCAT (@ReturnString, '"End":')
				SET @ReturnString = CONCAT (@ReturnString, (SELECT roiEnd FROM @ChannelNames WHERE idx = @i))

				SET @ReturnString = CONCAT (@ReturnString, ',')
				SET @ReturnString = CONCAT (@ReturnString, '"IsEnabled":')
				SET @ReturnString = CONCAT (@ReturnString, (SELECT CASE WHEN isEnabled = 1 THEN 'true' ELSE 'false' END FROM @ChannelNames WHERE idx = @i))

				SET @ReturnString = CONCAT (@ReturnString, ',')
				SET @ReturnString = CONCAT (@ReturnString, '"IsDefault":')
				SET @ReturnString = CONCAT (@ReturnString, (SELECT CASE WHEN isDefault = 1 THEN 'true' ELSE 'false' END FROM @ChannelNames WHERE idx = @i))

				SET @ReturnString = CONCAT (@ReturnString, ',')
				SET @ReturnString = CONCAT (@ReturnString, '"ChannelNames":')
				SET @ReturnString = CONCAT (@ReturnString, '[')
				SET @ReturnString = CONCAT (@ReturnString, '"')
				SET @ReturnString = CONCAT (@ReturnString, (SELECT SUBSTRING(ChannelName, CHARINDEX('\', ChannelName) + 1, LEN(ChannelName)) FROM @ChannelNames WHERE idx = @i))
				SET @ReturnString = CONCAT (@ReturnString, '"')
			END
			ELSE
			BEGIN
				SET @ReturnString = CONCAT (@ReturnString, '"')
				SET @ReturnString = CONCAT (@ReturnString, (SELECT SUBSTRING(ChannelName, CHARINDEX('\', ChannelName) + 1, LEN(ChannelName)) FROM @ChannelNames WHERE idx = @i))
				SET @ReturnString = CONCAT (@ReturnString, '"')
			END

			SET @i = @i + 1

			SET @NewSuffix = (SELECT Suffix FROM @ChannelNames WHERE idx = @i)
			IF ((@NewSuffix is null) OR (@NewSuffix <> @CurrentSuffix))
			BEGIN
				SET @ReturnString = CONCAT (@ReturnString, ']}')
			END

			SET @NewTestSetupId = (SELECT TestSetupId FROM @ChannelNames WHERE idx = @i)
			IF ((@NewTestSetupId is null) or (@NewTestSetupId <> @TestSetupId))
			BEGIN
				SET @ReturnString = CONCAT (@ReturnString, ']')
			END
			ELSE
			BEGIN
				SET @ReturnString = CONCAT (@ReturnString, ',')
			END
		END
	END

	RETURN @ReturnString
END