Add configuration option for the trigger "timer" in amp-analytics to support video analytics

[ThomasPaq]

With amp-analytics we can use the trigger "timer" to fire a request on a regular time interval. Currently the only options are interval and maxTimerLength.
Is it possible to add two options to link the begin and the end of the timer with events.

What we would like :

• the timer begins when the video starts
• the timer ends when the video stops

[jridgewell]

This could be wrapped up into #1654, no?

[dvoytenko]

/cc @rudygalfi @avimehta

[avimehta]

I think timer is the wrong place to do this. The correct behavior will be to have video events directly defined by the extension and amp-analytics supporting "videoStart" and videoEnd" etc triggers. As @jridgewell said, lets focus on #1654 getting added to AMP.

[ThomasPaq]

Hello,
This behavior will allow us to make video analytics in Médiamétrie. Maybe it's the wrong place to do this ...
I will try to explain you how our video analytics works :

1. for each standart player events (play, pause, stop) we send a request (we call theses requests 'state requests')
2. there is something important for us, what we call 'session'. A 'session' starts with the first play of the video and ends with the stop of the video. If there is a new play after a stop it will be a new session
3. when the session starts we have a 'timer' which will send request each minute (we call these requests 'polling requests")
4. the information that we need for the requests are : the video duration, the playhead position, the playhead position set in the previous hit, a session id (unchanged during the session) and a timer number (something like global variable requestCount but which reset for new session).
   What I think is :

• for 1) Add video analytics for amp-video to amp-analytics #1654 will provide the solution
• for 2) maybe we can add the 'session' notion in the amp-video component (with a session id wich reset itself when there is a stop) ?
• for 3) I thought that I had to create a new issue, this one, because 'timer' trigger seems near to what we call 'polling requests'
• for 4) I do not have any idea from know. I just hope that we can get the video duration, the video position and the session id from the player. For the position set in the previous hit and the timer number curently I do not have idea.
  Let me know what do you think about that. Maybe I am in the wrong direction

[rudygalfi]

We have a more proper design in #9902 that covers most or all of what's proposed here. Could you turn your attention to #9902 and give us additional feedback based on that design?

FYI @aghassemi closing this out in favor #9902.