Regularly send scrape request to trackers (See #2)

Author: chros

src/pyrocore/data/config/rtorrent-0.8.6.rc

@@ -110,3 +110,24 @@ branch=pyro.extended=,"schedule = bind_pyrotorque,0,0,\"ui.bind_key=download_lis
 
 # TORQUE: Daemon watchdog
 system.method.insert = pyro.watchdog,simple|private,"execute_nothrow=bash,-c,\"$cat=\\\"test ! -f \\\",$argument.0=,\\\"/run/pyrotorque || \\\",$pyro.bin_dir=,\\\"pyrotorque --cron \\\",$argument.1=\""
+
+# Regularly update scrape information for all torrents (even stopped ones), it won't affect the operation of rtorrent, but nice to have these values updated.
+# This info is only updated when rtorrent starts or a torrent is added by default.
+# Try to balance calls to not fire them up at the same time (since multiscraping isn't implemented in libtorrent). Check for update every 5 minutes and distinguish between 2 groups:
+#   - transferring (uploading and/or downloading) torrents: update in every 10 minutes
+#   - non-transferring torrents: update in every 12 hours
+# helper method: sets current time in a custom field (tm_last_scrape) and saves session
+method.insert = d.last_scrape.set, simple|private, "d.custom.set=tm_last_scrape,$cat=$system.time=; d.save_full_session="
+# helper method: sends the scrape request and sets the tm_last_scrape timestamp and saves session
+method.insert = d.last_scrape.send_set, simple, "d.tracker.send_scrape=0;d.last_scrape.set="
+# helper method: decides whether the required time interval (with the help of an argument) has passed and if so calls the above method
+method.insert = d.last_scrape.check_elapsed, simple|private, "branch={(elapsed.greater,$d.custom=tm_last_scrape,$argument.0=),d.last_scrape.send_set=}"
+# helper method: checks for non-existing/empty custom field to be able to test its validity later
+method.insert = d.last_scrape.check, simple|private, "branch={d.custom=tm_last_scrape,d.last_scrape.check_elapsed=$argument.0=,d.last_scrape.send_set=}"
+# helper method: decides whether a torrent transferring data or not
+method.insert = d.transferring.check, simple|private, "or={d.up.rate=,d.down.rate=}"
+# sets custom field (tm_last_scrape) to current time only for torrents just has been added (skips setting time on purpose when rtorrent started)
+method.set_key = event.download.inserted_new, last_scrape_i, "d.last_scrape.set="
+# check for update every 5 minutes (300 sec) and update scrape info for transferring torrents in every 10 minutes (600-20=580 sec) and for non-transferring ones in every 12 hours (43200-20=43180 sec)
+schedule2 = last_scrape_t, 300, 300, "d.multicall2=main,\"branch=$d.transferring.check=,d.last_scrape.check=580,d.last_scrape.check=43180\""
+