SigHelper: Make signature server optional and configurable

src/invidious/helpers/signatures.cr

@@ -1,10 +1,11 @@
 require "http/params"
 require "./sig_helper"
 
-struct Invidious::DecryptFunction
+class Invidious::DecryptFunction
   @last_update : Time = Time.utc - 42.days
 
-  def initialize
+  def initialize(uri_or_path)
+    @client = SigHelper::Client.new(uri_or_path)
     self.check_update
   end
 
@@ -16,19 +17,18 @@ struct Invidious::DecryptFunction
 
     # Get the time when the player was updated, in the event where
     # multiple invidious processes are run in parallel.
-    player_ts = Invidious::SigHelper::Client.get_player_timestamp
-    player_time = Time.unix(player_ts || 0)
+    player_time = Time.unix(@client.get_player_timestamp || 0)
 
     if (now - player_time) > 5.minutes
       LOGGER.debug("Signature: Player might be outdated, updating")
-      Invidious::SigHelper::Client.force_update
+      @client.force_update
       @last_update = Time.utc
     end
   end
 
   def decrypt_nsig(n : String) : String?
     self.check_update
-    return SigHelper::Client.decrypt_n_param(n)
+    return @client.decrypt_n_param(n)
   rescue ex
     LOGGER.debug(ex.message || "Signature: Unknown error")
     LOGGER.trace(ex.inspect_with_backtrace)
@@ -37,7 +37,7 @@ struct Invidious::DecryptFunction
 
   def decrypt_signature(str : String) : String?
     self.check_update
-    return SigHelper::Client.decrypt_sig(str)
+    return @client.decrypt_sig(str)
   rescue ex
     LOGGER.debug(ex.message || "Signature: Unknown error")
     LOGGER.trace(ex.inspect_with_backtrace)
@@ -46,7 +46,7 @@ struct Invidious::DecryptFunction
 
   def get_sts : UInt64?
     self.check_update
-    return SigHelper::Client.get_signature_timestamp
+    return @client.get_signature_timestamp
   rescue ex
     LOGGER.debug(ex.message || "Signature: Unknown error")
     LOGGER.trace(ex.inspect_with_backtrace)