Add a way to listen a module function for changes, ...

event.py

@@ -0,0 +1,65 @@
+# -*- coding: utf-8 -*-
+
+# Nemubot is a modulable IRC bot, built around XML configuration files.
+# Copyright (C) 2012  Mercier Pierre-Olivier
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import threading
+
+class ModuleEvent:
+    def __init__(self, func, func_data, check, cmp_data, intervalle=60,
+                 call=None, call_data=None, times=1):
+        # What have we to check?
+        self.func = func
+        self.func_data = func_data
+
+        # How detect a change?
+        self.check = check
+        if cmp_data is not None:
+            self.cmp_data = cmp_data
+        else:
+            self.cmp_data = self.func(self.func_data)
+
+        self.intervalle = intervalle
+
+        # What should we call when
+        self.call = call
+        if call_data is not None:
+            self.call_data = call_data
+        else:
+            self.call_data = func_data
+
+        # How many times do this event?
+        self.times = times
+
+
+    def launch_check(self):
+        d = self.func(self.func_data)
+        #print ("do test with", d, self.cmp_data)
+        if self.check(d, self.cmp_data):
+            self.call(self.call_data)
+            self.times -= 1
+        self.run()
+
+    def run(self):
+        if self.times != 0:
+            #print ("run timer")
+            self.timer = threading.Timer(self.intervalle, self.launch_check)
+            self.timer.start()
+        #else:
+            #print ("no more times")
+
+    def stop(self):
+        self.timer.cancel()