Get the SSIS package name of the SQL Agent Job

;WITH CTE1 AS (
    SELECT 
        J.job_id
        ,JobName = J.name
        ,JS.step_id, JS.step_name, JS.command
        ,StartIndex = 
            CASE 
                WHEN JS.command LIKE '/DTS%' OR JS.command LIKE '/SQL%' OR JS.command LIKE '/ISSERVER%' THEN CHARINDEX('\',JS.command, CHARINDEX('\',JS.command) + 1) --'
                WHEN JS.command LIKE '/SERVER%' THEN CHARINDEX('"', JS.Command, CHARINDEX(' ',command, CHARINDEX(' ',command) + 1) + 1) + 1
                ELSE 0
            END
        ,EndIndex = 
            CASE 
                WHEN JS.command LIKE '/DTS%' OR JS.command LIKE '/SQL%'  OR JS.command LIKE '/ISSERVER%' 
                    THEN  CHARINDEX('"',JS.command, CHARINDEX('\',JS.command, CHARINDEX('\',JS.command) + 1)) --'
                        - CHARINDEX('\',JS.command, CHARINDEX('\',JS.command) + 1) - 1 --'
                WHEN JS.command LIKE '/SERVER%' 
                    THEN  CHARINDEX('"',command, CHARINDEX('"', JS.Command, CHARINDEX(' ',command, CHARINDEX(' ',command) + 1) + 1) + 1)
                        - CHARINDEX('"', JS.Command, CHARINDEX(' ',command, CHARINDEX(' ',command) + 1) + 1) - 1
                ELSE 0
            END
    FROM msdb.dbo.sysjobsteps JS
    INNER JOIN msdb.dbo.sysjobs J
        ON JS.job_id = J.job_id
    WHERE JS.subsystem = 'SSIS'
)    
SELECT 
    C1.job_id
    , C1.JobName
    , C1.step_id
    , C1.step_name
    , PackageFolderPath = 
        CASE 
            WHEN C1.command LIKE '/DTS%' OR C1.command LIKE '/ISSERVER%' THEN SUBSTRING(C1.command, C1.StartIndex, C1.EndIndex)
            WHEN C1.command LIKE '/SQL%' THEN '\MSDB' + SUBSTRING(C1.command, C1.StartIndex, C1.EndIndex)
            WHEN C1.command LIKE '/SERVER%' THEN '\MSDB\' + SUBSTRING(C1.command, C1.StartIndex, C1.EndIndex)
            ELSE NULL
        END
    , C1.command
FROM CTE1 C1
ORDER BY C1.job_id, C1.step_id