prosody
2084959d4096
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 @ 3610:2084959d4096

configmanager: Update Include and RunScript directives to support paths relative to the (current!) config file
author Matthew Wild <mwild1@gmail.com>
date Wed, 10 Nov 2010 19:50:07 +0000
parent 3331:57a9cf5f4259
child 3625:f8d61da5bcc1
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)
3142
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
14 if not session.filters then
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
15 local filters = {};
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
16 session.filters = filters;
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
17
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
18 function session.filter(type, data)
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
19 local filter_list = filters[type];
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
20 if filter_list then
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
21 for i = 1, #filter_list do
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
22 data = filter_list[i](data);
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
23 if data == nil then break; end
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
24 end
3139
7b4f180d7c6f util.filters: Don't traceback with no filters of a type added
Matthew Wild <mwild1@gmail.com>
parents: 3135
diff changeset
25 end
3142
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
26 return data;
3133
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 end
3142
3cf02e5e632b util.filters: Ensure initialize() never initializes an object twice - and return the filter function to the caller
Matthew Wild <mwild1@gmail.com>
parents: 3140
diff changeset
29 return session.filter;
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
30 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
31
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
32 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
33 if not session.filters then
3134
9a29ad6a9b97 util.filters: Expose the initialization function
Matthew Wild <mwild1@gmail.com>
parents: 3133
diff changeset
34 initialize(session);
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
35 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
36
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
37 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
38 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
39 filter_list = {};
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
40 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
41 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
42
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
43 priority = priority or 0;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
44
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
45 local i = 0;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
46 repeat
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 i = i + 1;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48 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
49
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
50 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
51 filter_list[callback] = priority;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
52 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
53
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
54 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
55 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
56 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
57 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
58 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
59 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
60 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
61 filter_list[callback] = nil;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
62 return true;
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 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
65 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
66 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
67
3331
57a9cf5f4259 util.filters: Add newline at end of file
Matthew Wild <mwild1@gmail.com>
parents: 3142
diff changeset
68 return _M;