Code rework for Kodi plugin

[volumio]

@Saiyato

Before deploying the Kodi plugin there are few issues that need to be solved:

• The UIConfig does not get loaded:
  ERROR LOADING JSON Error: ENOENT: no such file or directory, open '/data/plugins/miscellanea/Kodi/UIConfig.json'
• Tvservice is not found:
  Dec 18 22:42:37 Volumio kodi-standalone[29879]: /usr/bin/kodi: 46: /usr/bin/kodi: tvservice: not found

use always the full path: /opt/vc/bin/tvservice

• Not sure if it's related, but:
  oreCommandRouter::Close All Modals sent
  Dec 18 22:42:38 Volumio kodi-standalone[29879]: *** Error in `/usr/lib/arm-linux-gnueabihf/kodi/kodi_v7.bin': munmap_chunk(): invalid pointer: 0x02dda4b4 ***
  Dec 18 22:42:38 Volumio kodi-standalone[29879]: * failed to open vchiq instance
  Dec 18 22:42:38 Volumio kodi-standalone[29879]: Aborted (core dumped)

[Saiyato]

I just patched the tvservice not found error, it needed a symlink in the install script.

I couldn't reproduce the JSON error, do you have more info for me? How can I test that?

The last error is caused by a memory shortage, you need a reboot after installation (/boot/config.txt is changed)

[Saiyato]

Never mind, I see what happened... you removed the zip file; the problem is with the directory name I used, I use a capital K and uploaded a non-capital k directory.

What do you think? Capital K or not? I have no real preference, just used the capital because it's a name.

Maybe even make it a naming convention, all lower or something like that.

[volumio]

• Use all lowercase (so no capital K)
• Avoid as much as possible to write to SD Card (so don't make the symlink if possible)
• If the user needs to restart you must tell him, so use a popup to notify, see alsa controller plugin to see how to do it
• I removed the zip because we should always produce from source, this way we can keep code consistent

[Saiyato]

Check! Will (try to) patch the directory name tomorrow.

The symlink is because the file is read from /usr/bin/ as opposed to /opt/vc/bin/, it's not really necessary, but the error is ugly imho. It might just work if I move the tvservice binary to /usr/bin/ not sure what that would mean for other applications (I think nothing, but it's just a theory).

I will also read into the alsa controller plugin... I know how to create the pop-up, just not after installation (from install.sh), don't know if the onInstall method works right now.

[volumio]

• We can add an alias for tv service, I think its useful. Can you send a pr to the build repo? (look in volumioconfig.sh when we create the aliases), we can take the chance of adding the command to nopasswd as well
• We can extend the rest api service to include a call from which you can broadcast a popup, we need to be creative with this ;) so you can invoke it from the sh

[Saiyato]

Added the PR for tv service, not sure if nopasswd is required. Heck, I don't even fully understand what it does, I believe it detects attached screens, but apart from that...

The pop-up in the API would help yes, haven't had the time to read into the alsa controller, but I presume that pop-up doesn't come from sh.

Testing the new directory name now first, hopefully I can push the version tonight.