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Write multiple times to a sharepoint list and return the last entered value when click of a button

This is related to PowerApps time tracker which was created by @RandyHayes 

In it I have created 2 separate buttons called "break" & "back". So ultimate goal is for users to be able to log unlimited amount of breaks and show the last time they took a break and when they came back ( eg. user takes a break at 4.00 comes back at 4.10 then when user click the break button again the user must be able to see the current time in break button, not the last break time which is 4.00)


I only managed to write 1 set of "break" & "back" to sharepoint list from below code with time showing on button 



Coalesce(Text(ThisItem.value),ThisItem.display) = Self.Text && ThisItem.enabled 




Coalesce(Text(DateTimeValue(ThisItem.value),ShortTime), ThisItem.display)


If I only show the ThisItem.display on the button text value then i can write multiple times to sharepoint list 



ThisItem.display = Self.Text && ThisItem.enabled






Initially only "break" should be enabled. when click "break" then "back" button should be enabled. not sure how this will work when we do multiple breaks




{display:"Break", value:data.Break, enabled: IsBlank(data.Back) && IsBlank(data.Break) || !IsBlank(data.Back) },
{display:"Back", value:data.Back, enabled: !IsBlank(data.Break) }


Also below code only filter today values. lets see if someone who checkin yesterday night and checkout today morning then this wont work. is there anyway we could filter by last 24hrs?


With({lclRecs:Filter('Attendance Tracker', Title=glbUser && StartsWith(ActivityDateTime, Text(Today() , "[$-en-US]yyyymmdd")) ) },


Any help is much appreciated 

I'm just a newbie to powerapps 


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