Twitch Follow Count (Via TwitchTracker)

# @name    Twitch_Subs
# @desc    Follower count of a Twitch channel via TwitchTracker
# @author  Blueforcer / Korrupt (Mod)
# @version 1.2
# @config  user      text   "Twitch Channel" default="UserName" maxlen=32
# @config  txt_color color  "Text Color"   default=#9146FF
# @config  fx_name   select "Effect"       default=None options=None,Matrix,Plasma,ColorWaves,TwinklingStars,Fireworks,Ripple
# @config  fx_speed  slider "FX Speed"     default=0.3 min=0.1 max=2.0 step=0.1

class Twitch
  var url, user, period
  var count, label, full, err
  var ticks, busy
  var opts, px, fx_opts

  def init()
    self.user = store.get("user")
    self.url = "https://twitchtracker.com/api/channels/summary/" + self.user
    self.period = 3600            # once an hour

    self.count = store.get("who") == self.user ? store.get("n") : nil
    self.label = self.count == nil ? nil : self.human(self.count)
    self.full = self.count == nil ? nil : str(self.count)
    self.err = false
    self.ticks = 0
    self.busy = false
    self.opts = {'headers': {'User-Agent': 'Mozilla/5.0'},
                 'find': "\"followers_total\":", 'keep': 32}
    
    # Settings map for background effect
    self.fx_opts = {"speed": store.get("fx_speed")}

    # Clean 8x8 Twitch Glitch logo (0x000000 = transparent)
    # 0x9146FF = Twitch Purple, 0xFFFFFF = White
    self.px = [0x000000, 0x9146FF, 0x9146FF, 0x9146FF, 0x9146FF, 0x9146FF, 0x9146FF, 0x9146FF,
               0x9146FF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0x9146FF,
               0x9146FF, 0xFFFFFF, 0xFFFFFF, 0x9146FF, 0xFFFFFF, 0x9146FF, 0xFFFFFF, 0x9146FF,
               0x9146FF, 0xFFFFFF, 0xFFFFFF, 0x9146FF, 0xFFFFFF, 0x9146FF, 0xFFFFFF, 0x9146FF,
               0x9146FF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0x9146FF,
               0x9146FF, 0x9146FF, 0x9146FF, 0xFFFFFF, 0xFFFFFF, 0x9146FF, 0x9146FF, 0x9146FF,
               0x000000, 0x000000, 0x9146FF, 0xFFFFFF, 0x9146FF, 0x000000, 0x000000, 0x000000,
               0x000000, 0x000000, 0x9146FF, 0x9146FF, 0x000000, 0x000000, 0x000000, 0x000000]
  end

  def human(n)
    if n < 1000 return str(n) end
    var d = 1000
    var suf = "K"
    if n >= 1000000000
      d = 1000000000
      suf = "B"
    elif n >= 1000000
      d = 1000000
      suf = "M"
    end
    var v = n / (d + 0.0)
    if v >= 10 return str(round(v)) + suf end
    var t = round(v * 10)
    return str(int(t / 10)) + "." + str(t % 10) + suf
  end

  def on_body(body, status)
    self.busy = false
    shared.set("f", 0)

    if status != 200 || body == nil
      self.err = true
      return
    end

    var m = re.search("(\\d+)", body)
    if m == nil
      self.err = true
      return
    end

    var n = num(m[1])
    if n == nil return end
    self.err = false
    if n == self.count return end

    self.count = n
    self.full = str(n)
    self.label = self.human(n)
    store.set("n", n)
    store.set("who", self.user)
  end

  def tls_busy()
    for k : shared.keys()
      if size(k) > 2 && k[size(k) - 2 .. size(k) - 1] == ".f" && shared.get(k) == 1
        var a = shared.age(k)
        if a != nil && a < 20000 return true end
      end
    end
    return false
  end

  def loop()
    if self.ticks <= 0
      if !self.busy && !self.tls_busy()
        self.ticks = self.period
        self.busy = true
        shared.set("f", 1)
        http.get(self.url, / b, st -> self.on_body(b, st), self.opts)
      end
    end
    self.ticks -= 1
  end

  def draw()
    clear()

    # Apply background effect first if configured
    var fx = store.get("fx_name")
    if fx != nil && fx != "None"
      self.fx_opts["speed"] = store.get("fx_speed")
      effect(fx, self.fx_opts)
    end

    # Draw Twitch logo pixel matrix over background (skips 0x000000)
    for y : 0 .. 7
      for x : 0 .. 7
        var i = y * 8 + x
        if self.px[i] != 0
          pixel(x, y, self.px[i])
        end
      end
    end

    var color = store.get("txt_color")

    if self.label != nil
      var avail = width() - 9
      var s = self.full
      var w = text_ink_width(s)
      if w > avail
        s = self.label
        w = text_ink_width(s)
      end
      text(9 + (avail - w) / 2, 6, s, color)
      return
    end

    var s = self.err ? "?" : "..."
    var w = text_ink_width(s)
    text(9 + (width() - 9 - w) / 2, 6, s, self.err ? 0xCC7722 : 0x555555)
  end

end

return Twitch()