Redirect with Delay

[juancarlospaco]

• Add 1 Template with a Redirect with a Delay page that also shows a Result text, for plugin developers and better UX than a vanilla redirect.
• You can pass a delaySeconds from 0 to 255 with a message for the user, if things going Ok or not or whats happening.
• Page is kinda Generic enought to be used everywhere, and the message should provide better UX than just redirect "/" when successful.
• This is useful for Plugins developers, but also on /settings we can improve the UX, on some places we are using just redirect "/" when successful.
• Default delay is 5 Seconds, so the user can see the Results message, our Backend is fast to do most things on less than 5 Seconds anyway.

Before:

get "/someurl":
  createTFD()
  if sucessful:
    redirect "/settings"

get "/reallySlowOperation":
  createTFD()
  if sucessful:
    redirect "/"

After:

get "/someurl":
  createTFD()
  if sucessful:
    resp genMain(c, genDelayRedirect("/settings", "**Nim world domination succesfull:** Returning to Settings page."))

get "/reallySlowOperation":
  createTFD()
  if sucessful:
    resp genMain(c, genDelayRedirect("/", "**Please Wait:** *Solving the squaring of the circle.*", 30))  # We know operation takes less than 30 seconds to complete.

Code to Test it, add on routes.nim:

  get "/delayredirect":
    createTFD()
    resp genMain(c, genDelayRedirect("/settings", message="**Your Message** *here*", 2))

Easy to Merge, since not touching any pre-existent code. :slightly_smiling_face:

[ThomasTJdev]

Really good solution! I have been trying to solve this multiple times, specially using Jester's after "/": to avoid websockets, but without success. We should only use it for actions, where we know a delay time could occur, not just for a notification like Settings has been updated. I'm looking forward to using it on the enable/disable plugins.

I can first test it on one of the next days, but the code looks fine to me, so if you need it, you can merge!