Update to pymongo 4.x, fix last and termdates plugins

Author: alanbriolat

setup.py

@@ -16,7 +16,7 @@
     install_requires=[
         'click>=6.2,<7.0',
         'straight.plugin==1.4.0-post-1',
-        'pymongo>=3.6.0,<4',
+        'pymongo>=4.0.1',
         'requests>=2.9.1,<3.0.0',
         'lxml>=2.3.5',
         'aiogoogle>=0.1.13',

src/csbot/plugins/last.py

@@ -106,8 +106,7 @@ def _schedule_update(self, e, query, update):
 
     @Plugin.hook('last.update')
     def _apply_update(self, e):
-        self.db.remove(e['query'])
-        self.db.insert(e['update'])
+        self.db.replace_one(e['query'], e['update'], upsert=True)
 
     @Plugin.command('seen', help=('seen nick [type]: show the last thing'
                                   ' said by a nick in this channel, optionally'

src/csbot/plugins/termdates.py

@@ -196,8 +196,16 @@ def termdates_set(self, e):
         # Save to the database. As we don't touch the _id attribute in this
         # method, this will cause `save` to override the previously-loaded
         # entry (if there is one).
-        self.db_terms.save(self.terms)
-        self.db_weeks.save(self.weeks)
+        if '_id' in self.terms:
+            self.db_terms.replace_one({'_id': self.terms['_id']}, self.terms, upsert=True)
+        else:
+            res = self.db_terms.insert_one(self.terms)
+            self.terms['_id'] = res.inserted_id
+        if '_id' in self.weeks:
+            self.db_weeks.replace_one({'_id': self.weeks['_id']}, self.weeks, upsert=True)
+        else:
+            res = self.db_weeks.insert_one(self.weeks)
+            self.weeks['_id'] = res.inserted_id
 
         # Finally, we're initialised!
         self.initialised = True