[IMPR] Use site.ratelimit for bulk purge in PurgeBot

Change-Id: If5b1334e66d2f648dbde4ceec2918f87097bb9f6
---
M scripts/touch.py
1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/scripts/touch.py b/scripts/touch.py
index 3fdfbf5..e0ca6c2 100755
--- a/scripts/touch.py
+++ b/scripts/touch.py
@@ -83,6 +83,7 @@
         """Initializer."""
         super().__init__(*args, **kwargs)
         self.pages = defaultdict(list)
+        self.limit = {}
 
     def treat(self, page) -> None:
         """Purge the given page.
@@ -93,6 +94,7 @@
         """
         # We can have mutiple sites, save pages and cache rate limit
         self.pages[page.site].append(page)
+        self.limit.setdefault(page.site, page.site.ratelimit('purge'))
         self.purgepages()
 
     def teardown(self):
@@ -110,13 +112,15 @@
     def purgepages(self, flush=False):
         """Purge a bulk of page if rate limit exceeded.
 
-        Use default rate limit for purging pages which is 30/60.
-
         .. versionadded:: 8.0
+        .. versionchanged:: 9.0
+           :meth:`site.APISite.ratelimit()
+           <pywikibot.site._apisite.APISite.ratelimit>` method is used
+           to determine bulk length and delay.
         """
         for site, pagelist in self.pages.items():
             length = len(pagelist)
-            if flush or length >= 30:
+            if flush or length >= self.limit[site].hits:
                 done = site.purgepages(pagelist, **self.opt)
                 if done:
                     self.counter['purge'] += length
@@ -124,9 +128,12 @@
 
                 pywikibot.info(
                     f"{length} pages{'' if done else ' not'} purged")
-                if not flush and not config.simulate:
-                    pywikibot.info('Waiting due to purge rate limit')
-                    pywikibot.sleep(62)
+                if not flush and config.simulate is False:
+                    delay = self.limit[site].delay * (length + 1)
+                    if delay:
+                        pywikibot.info(
+                            f'Waiting {delay} seconds due to purge rate limit')
+                        pywikibot.sleep(delay)
 
 
 def main(*args: str) -> None:

