--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/templates/detectors/nosyreaction.py	Sun Jul 22 12:09:32 2001 +0000
@@ -0,0 +1,64 @@
+#$Id: nosyreaction.py,v 1.1 2001-07-22 12:09:32 richard Exp $
+
+def nosyreaction(db, cl, nodeid, oldvalues):
+    ''' A standard detector is provided that watches for additions to the
+        "messages" property.
+        
+        When a new message is added, the detector sends it to all the users on
+        the "nosy" list for the issue that are not already on the "recipients"
+        list of the message.
+        
+        Those users are then appended to the "recipients" property on the
+        message, so multiple copies of a message are never sent to the same
+        user.
+        
+        The journal recorded by the hyperdatabase on the "recipients" property
+        then provides a log of when the message was sent to whom. 
+    '''
+    messages = []
+    if oldvalues is None:
+        # the action was a create, so use all the messages in the create
+        messages = cl.get(nodeid, 'messages')
+    elif oldvalues.has_key('messages'):
+        # the action was a set (so adding new messages to an existing issue)
+        m = {}
+        for msgid in oldvalues['messages']:
+            m[msgid] = 1
+        messages = []
+        # figure which of the messages now on the issue weren't there before
+        for msgid in cl.get(nodeid, 'messages'):
+            if not m.has_key(msgid):
+                messages.append(msgid)
+    if not messages:
+        return
+
+    # send a copy to the nosy list
+    for msgid in messages:
+        cl.sendmessage(nodeid, msgid)
+
+    # update the nosy list with the recipients from the new messages
+    nosy = cl.get(nodeid, 'nosy')
+    n = {}
+    for nosyid in nosy: n[nosyid] = 1
+    change = 0
+    # but don't add admin to the nosy list
+    for msgid in messages:
+        for recipid in db.msg.get(msgid, 'recipients'):
+            if recipid != '1' and not n.has_key(recipid):
+                change = 1
+                nosy.append(recipid)
+        authid = db.msg.get(msgid, 'author')
+        if authid != '1' and not n.has_key(authid):
+            change = 1
+            nosy.append(authid)
+    if change:
+        cl.set(nodeid, nosy=nosy)
+
+
+def init(db):
+    db.issue.react('create', nosyreaction)
+    db.issue.react('set', nosyreaction)
+
+#
+#$Log: not supported by cvs2svn $
+#