Feat: Adding carplay ability

[alexm8002]

Signed-off-by: alexm8002 a.m.a.martinez@icloud.com

Summary

Adds Apple CarPlay support to Nextcloud Talk, allowing users to browse Talk conversations and start native Talk calls directly from CarPlay.

Changes

• Add CarPlay scene and interface
• Add Conversations, Recent Calls and Speed Dial views
• Start native Talk calls from CarPlay
• Add Siri / INStartCallIntent support
• Reuse the existing Talk room and CallKit infrastructure

Scope

This PR is limited to CarPlay and Siri integration.

SIP/PSTN dial-out support, phone number dialing and related telephony features are intentionally excluded and will be submitted separately.

[Ivansss]

I gave it a try locally, and it's really nice to see Talk on CarPlay! There are two things that need to be fixed before we can move forward, plus a few ideas to make it even better.

Blockers

• App crashes on launch: the INPreferences.requestSiriAuthorization call makes the app crash because the com.apple.developer.siri entitlement is missing. Besides that, it would be great if we only asked for Siri permission when it's actually needed. Right now everyone gets the Siri prompt the first time they open the app, even if they never use CarPlay. When tapping the "Ask Siri to make a call" button, it already asks for permission if they are not already granted, so we can leave the asking for permission just there.
• Localization CI check: the "Check for localizable changes" job is failing because the new strings ("Speed Dial", "History", "No recent calls", …) aren't in Localizable.strings yet. Running ./generate-localizable-strings-file.sh and committing the result should make it happy 🙂

Things to improve

• Avatars: it would be really nice to show the conversation avatars instead of the generic person icon. AvatarManager.shared.getAvatar(for:with:completionBlock:) already handles all the cases, and CPListItem.setImage(_:) lets you update the row once the image is loaded.
• In-call view: after starting a call, either from a conversation in the Rooms tab or from the Calls tab, the Talk CarPlay app stays in the view with the call button or in the list. The call can only be ended by switching to the CallKit call screen. It would be great to have an in-call view inside the Talk app where the call can be ended directly.
• Single view instead of tabs: the two tabs overlap quite a bit. What do you think about a single list with the Siri cell on top, followed by ongoing calls, favorites, and then the other conversations?
• Plurals: "%ld unread messages" should be a plural string so it reads nicely for a single message too. The existing "%ld conversations with unread messages" entry in en.lproj/Localizable.stringsdict makes a good template.

Thanks a lot for your work on this, and let me know if anything's unclear or if I can help! 🙏

[alexm8002]

@Ivansss, thanks for the detailed feedback — all of the requested changes have now been addressed.

Blockers

• Siri authorization on launch
  • Removed the INPreferences.requestSiriAuthorization call from app startup.
  • Siri permission is now only requested when the user actually uses the Siri/CarPlay call action.
  • This also avoids the launch crash when the Siri entitlement is not available.
• Localization CI
  • Regenerated the localizable strings and added the new CarPlay strings.
  • The unread message string has also been moved to Localizable.stringsdict to support proper singular/plural handling.

Improvements

• Conversation avatars
  • Replaced the generic person icon with real Talk conversation avatars.
  • Avatars are loaded asynchronously through AvatarManager.shared.getAvatar(...) and applied to the corresponding CPListItem.
• In-call view
  • Added a dedicated in-call CarPlay view.
  • Ongoing calls are now visible directly inside the Talk CarPlay interface instead of requiring a switch to the CallKit screen.
• Single view
  • Removed the separate Rooms / Calls tabs.
  • The CarPlay UI now uses a single list with:
    • Siri call action
    • ongoing calls
    • favorites
    • remaining conversations
• Pluralization
  • "%ld unread messages" now uses a plural rule in Localizable.stringsdict, so both singular and plural forms are handled correctly.

I also adjusted the CarPlay Siri handling so INStartCallIntent is routed correctly through the CarPlay scene when the phone is connected to CarPlay.

[Ivansss]

Thanks for the updates, this is a big step forward! There are still two blockers, plus some smaller things.

Blockers

• Localization CI check: still failing because some new strings are missing in Localizable.strings. Please run ./generate-localizable-strings-file.sh every time strings are added or changed, and commit the result.
• Joining ongoing calls: room.hasCall means there's a call in the conversation, not that the user is in it. Tapping a conversation in "Ongoing calls" shows an "End call" button and there's no way to join.

Things to improve

• App name: please use talkAppName from NCAppBranding for the title of the main list instead of the hardcoded "Talk", so branded apps show their own name. The "Nextcloud Talk" subtitle in the conversation view can be removed, or replaced with the call state (e.g. "Call in progress").
• In-call view: instead of pushing a separate view, update the conversation view itself. CPContactTemplate.contact can be reassigned, so the same view can show "Call", "Join call" (when a call is already going on), or a red "End call" button (e.g. a CPButton with phone.down.fill) once the user is in the call. This fixes the blocker above, and also the back button issue: activeCallTemplate isn't reset when leaving the view, so it can't be shown again until the call ends.
• Avatars: avatars flicker on every rooms update, since all items are recreated with the placeholder and the avatar is set asynchronously via DispatchQueue.main.async. Cached avatars are returned synchronously, so calling item.setImage(image) directly in loadAvatar sets them before the item is displayed. I tested this locally and the flickering is gone. Also, it would be nice to show the avatars rounded, and in the conversation details view as well.
• Cleanup: callHistory() is unused and can be removed.

Great work so far, really looking forward to having this in! If you have any questions, just ping me :)