prosody
8c6ed6fd2d35
util/filters.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/filters.lua @ 3140:8c6ed6fd2d35

util.filters: Break processing if a filterer returns nil
author Matthew Wild <mwild1@gmail.com>
date Wed, 02 Jun 2010 13:31:36 +0100
parent 3139:7b4f180d7c6f
child 3142:3cf02e5e632b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
1 -- Prosody IM
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
2 -- Copyright (C) 2008-2010 Matthew Wild
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
3 -- Copyright (C) 2008-2010 Waqas Hussain
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
4 --
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
5 -- This project is MIT/X11 licensed. Please see the
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
6 -- COPYING file in the source package for more information.
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
7 --
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
8
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
9 local t_insert, t_remove = table.insert, table.remove;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
10
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
11 module "filters"
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
12
3134
9a29ad6a9b97 util.filters: Expose the initialization function
Matthew Wild <mwild1@gmail.com>
parents: 3133
diff changeset
13 function initialize(session)
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
14 local filters = {};
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
15 session.filters = filters;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
16
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
17 function session.filter(type, data)
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
18 local filter_list = filters[type];
3139
7b4f180d7c6f util.filters: Don't traceback with no filters of a type added
Matthew Wild <mwild1@gmail.com>
parents: 3135
diff changeset
19 if filter_list then
7b4f180d7c6f util.filters: Don't traceback with no filters of a type added
Matthew Wild <mwild1@gmail.com>
parents: 3135
diff changeset
20 for i = 1, #filter_list do
7b4f180d7c6f util.filters: Don't traceback with no filters of a type added
Matthew Wild <mwild1@gmail.com>
parents: 3135
diff changeset
21 data = filter_list[i](data);
3140
8c6ed6fd2d35 util.filters: Break processing if a filterer returns nil
Matthew Wild <mwild1@gmail.com>
parents: 3139
diff changeset
22 if data == nil then break; end
3139
7b4f180d7c6f util.filters: Don't traceback with no filters of a type added
Matthew Wild <mwild1@gmail.com>
parents: 3135
diff changeset
23 end
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
24 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
25 return data;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
26 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
27 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
28
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
29 function add_filter(session, type, callback, priority)
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
30 if not session.filters then
3134
9a29ad6a9b97 util.filters: Expose the initialization function
Matthew Wild <mwild1@gmail.com>
parents: 3133
diff changeset
31 initialize(session);
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
32 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
33
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
34 local filter_list = session.filters[type];
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
35 if not filter_list then
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
36 filter_list = {};
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
37 session.filters[type] = filter_list;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
38 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
39
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
40 priority = priority or 0;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
41
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
42 local i = 0;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
43 repeat
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
44 i = i + 1;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
45 until not filter_list[i] or filter_list[filter_list[i]] >= priority;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
46
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 t_insert(filter_list, i, callback);
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48 filter_list[callback] = priority;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
49 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
50
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
51 function remove_filter(session, type, callback)
3135
f29a297471e3 util.filters: Don't traceback when trying to remove a filter from an uninitialized object
Matthew Wild <mwild1@gmail.com>
parents: 3134
diff changeset
52 if not session.filters then return; end
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
53 local filter_list = session.filters[type];
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
54 if filter_list and filter_list[callback] then
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
55 for i=1, #filter_list do
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
56 if filter_list[i] == callback then
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
57 t_remove(filter_list, i);
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
58 filter_list[callback] = nil;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
59 return true;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
60 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
61 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
62 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
63 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
64
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
65 return _M;