feat(calls): Allow moderators to download a call participants list - frontend

[DorraJaouad]

☑️ Resolves

• Fix Moderators must be able to download the participant list as PDF and CSV #13453

🖌️ UI Checklist

🖼️ Screenshots / Screencasts

During call	Output

🏁 Checklist

• 🌏 Tested with different browsers / clients:
  • Chromium (Chrome / Edge / Opera / Brave)
  • Firefox
  • Safari
  • Talk Desktop
  • Not risky to browser differences / client
• 🖌️ Design was reviewed, approved or inspired by the design team
• ⛑️ Tests are included or not possible
• 📗 User documentation in https://github.com/nextcloud/documentation/tree/master/user_manual/talk has been updated or is not required

[Ivansss]

Just as an idea, would be possible to add this option somewhere in the participant list?

Somewhere here maybe?

[Antreesy]

Somewhere here maybe?

Maybe as a second entry, if it would feel needed there.
But then this section needs some rework

[DorraJaouad]

Maybe as a second entry, if it would feel needed there.

I'd go for one entry only IMO.

Just as an idea, would be possible to add this option somewhere in the participant list?

We also thought it will fit better in participants tab but the current design doesn't help much in putting it there :').

[Antreesy]

Tested. Filename change we can do separately on backend, right?

[DorraJaouad]

Filename change we can do separately on backend

As it is received from backend, I assumed it will be modified there. I am fine with adding it in this PR

[Antreesy]

Maybe without an additional hyphen?

Suggested change

	$fileName = "{$cleanedRoomName} - {$date}.csv";
	$fileName = "{$cleanedRoomName} {$date}.csv";

[nickvergessen]

In PHP we usually avoid these variables inside strings, so would be:

Suggested change

	$fileName = "{$cleanedRoomName} - {$date}.csv";
	$fileName = $cleanedRoomName . ' - ' . $date . '.csv';

or with Antreesy's comment:

Suggested change

	$fileName = "{$cleanedRoomName} - {$date}.csv";
	$fileName = $cleanedRoomName . ' ' . $date . '.csv';

or counterproposal:

Suggested change

	$fileName = "{$cleanedRoomName} - {$date}.csv";
	$fileName = $cleanedRoomName . '-' . $date . '.csv';

[nickvergessen]

Suggested change

	$date = (new \DateTime())->format('Y-m-d');
	$date = $this->timeFactory->getDateTime()->format('Y-m-d');

[DorraJaouad]

Is it in UTC time because it is coming from server?

[nickvergessen]

It would be, but we can inject the user's timezone