--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/templates/classic/detectors/nosyreaction.py	Thu Apr 17 03:38:00 2003 +0000
@@ -0,0 +1,142 @@
+#
+# Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
+# This module is free software, and you may redistribute it and/or modify
+# under the same terms as Python, so long as this copyright message and
+# disclaimer are retained in their original form.
+#
+# IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
+# DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
+# OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+# BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+# BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE.  THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
+# BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
+# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+# 
+#$Id: nosyreaction.py,v 1.1 2003-04-17 03:26:38 richard Exp $
+
+from roundup import roundupdb, hyperdb
+
+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. 
+    '''
+    # send a copy of all new messages to the nosy list
+    for msgid in determineNewMessages(cl, nodeid, oldvalues):
+        try:
+            cl.nosymessage(nodeid, msgid, oldvalues)
+        except roundupdb.MessageSendError, message:
+            raise roundupdb.DetectorError, message
+
+def determineNewMessages(cl, nodeid, oldvalues):
+    ''' Figure a list of the messages that are being added to the given
+        node in this transaction.
+    '''
+    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)
+    return messages
+
+def updatenosy(db, cl, nodeid, newvalues):
+    '''Update the nosy list for changes to the assignedto
+    '''
+    # nodeid will be None if this is a new node
+    current = {}
+    if nodeid is None:
+        ok = ('new', 'yes')
+    else:
+        ok = ('yes',)
+        # old node, get the current values from the node if they haven't
+        # changed
+        if not newvalues.has_key('nosy'):
+            nosy = cl.get(nodeid, 'nosy')
+            for value in nosy:
+                if not current.has_key(value):
+                    current[value] = 1
+
+    # if the nosy list changed in this transaction, init from the new value
+    if newvalues.has_key('nosy'):
+        nosy = newvalues.get('nosy', [])
+        for value in nosy:
+            if not db.hasnode('user', value):
+                continue
+            if not current.has_key(value):
+                current[value] = 1
+
+    # add assignedto(s) to the nosy list
+    if newvalues.has_key('assignedto') and newvalues['assignedto'] is not None:
+        propdef = cl.getprops()
+        if isinstance(propdef['assignedto'], hyperdb.Link):
+            assignedto_ids = [newvalues['assignedto']]
+        elif isinstance(propdef['assignedto'], hyperdb.Multilink):
+            assignedto_ids = newvalues['assignedto']
+        for assignedto_id in assignedto_ids:
+            if not current.has_key(assignedto_id):
+                current[assignedto_id] = 1
+
+    # see if there's any new messages - if so, possibly add the author and
+    # recipient to the nosy
+    if newvalues.has_key('messages'):
+        if nodeid is None:
+            ok = ('new', 'yes')
+            messages = newvalues['messages']
+        else:
+            ok = ('yes',)
+            # figure which of the messages now on the issue weren't
+            # there before - make sure we don't get a cached version!
+            oldmessages = cl.get(nodeid, 'messages', cache=0)
+            messages = []
+            for msgid in newvalues['messages']:
+                if msgid not in oldmessages:
+                    messages.append(msgid)
+
+        # configs for nosy modifications
+        add_author = getattr(db.config, 'ADD_AUTHOR_TO_NOSY', 'new')
+        add_recips = getattr(db.config, 'ADD_RECIPIENTS_TO_NOSY', 'new')
+
+        # now for each new message:
+        msg = db.msg
+        for msgid in messages:
+            if add_author in ok:
+                authid = msg.get(msgid, 'author')
+                current[authid] = 1
+
+            # add on the recipients of the message
+            if add_recips in ok:
+                for recipient in msg.get(msgid, 'recipients'):
+                    current[recipient] = 1
+
+    # that's it, save off the new nosy list
+    newvalues['nosy'] = current.keys()
+
+def init(db):
+    db.issue.react('create', nosyreaction)
+    db.issue.react('set', nosyreaction)
+    db.issue.audit('create', updatenosy)
+    db.issue.audit('set', updatenosy)
+
+# vim: set filetype=python ts=4 sw=4 et si