fix(admin): better validation for uploaded games

[joshzcold]

Fixes: #5

take the same new game validator and put it on the admin page to validate uploaded games as well

Improve the json parse error to include the actual error on parse

[joshzcold]

Fixes: #5

[karlromets]

The example image looks bad, is the newline not newlining? 😅

Also could you please provide the faulty .json file for testing ?

[joshzcold]

The example image looks bad, is the newline not newlining? 😅

Also could you please provide the faulty .json file for testing ?

Yeah lol it's not doing a new lines job

Here is an example json file that should trigger about 4 errors
game_0.json

[joshzcold]

@karlromets pushed a fix. Now looks like

[karlromets]

Looks good, however due to the error timeout being 5s, the game file error disappears after 5 seconds. This is pretty bad user experience e.g. for slow readers.

Issue comes from this function with a timeout:

function setError(e) {
  setErrorVal(e);
  console.error(e);
  setTimeout(() => {
    setErrorVal("");
  }, 5000);
}

[joshzcold]

Yeah, Ill go ahead and double it