prosody
e8c743f4213f
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 @ 5850:e8c743f4213f

Merge 0.9->0.10
author Matthew Wild <mwild1@gmail.com>
date Mon, 30 Sep 2013 23:46:38 +0100
parent 5776:bd0ff8ae98a8
parent 5849:8f451d370dd4
child 6367:769a3577dd85
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
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
4 --
3133
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
3625
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
13 local new_filter_hooks = {};
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
14
3134
9a29ad6a9b97 util.filters: Expose the initialization function
Matthew Wild <mwild1@gmail.com>
parents: 3133
diff changeset
15 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
16 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
17 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
18 session.filters = filters;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
19
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
20 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
21 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
22 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
23 for i = 1, #filter_list do
3625
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
24 data = filter_list[i](data, 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
25 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
26 end
3139
7b4f180d7c6f util.filters: Don't traceback with no filters of a type added
Matthew Wild <mwild1@gmail.com>
parents: 3135
diff changeset
27 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
28 return data;
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
29 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
30 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
31
3625
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
32 for i=1,#new_filter_hooks do
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
33 new_filter_hooks[i](session);
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
34 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
35
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
36 return session.filter;
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
37 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
38
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
39 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
40 if not session.filters then
3134
9a29ad6a9b97 util.filters: Expose the initialization function
Matthew Wild <mwild1@gmail.com>
parents: 3133
diff changeset
41 initialize(session);
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
42 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
43
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
44 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
45 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
46 filter_list = {};
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 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
48 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
49
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
50 priority = priority or 0;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
51
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
52 local i = 0;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
53 repeat
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
54 i = i + 1;
5849
8f451d370dd4 util.filters: Fix inserting items so that higher priority filters run first
Kim Alvefur <zash@zash.se>
parents: 3943
diff changeset
55 until not filter_list[i] or filter_list[filter_list[i]] < priority;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
56
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
57 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
58 filter_list[callback] = priority;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
59 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
60
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
61 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
62 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
63 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
64 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
65 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
66 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
67 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
68 filter_list[callback] = nil;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
69 return true;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
70 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
71 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
72 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
73 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
74
3625
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
75 function add_filter_hook(callback)
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
76 t_insert(new_filter_hooks, callback);
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
77 end
f8d61da5bcc1 util.filters: Support for 'filter hooks' that get called when a session is initialized for filters
Matthew Wild <mwild1@gmail.com>
parents: 3331
diff changeset
78
3943
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
79 function remove_filter_hook(callback)
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
80 for i=1,#new_filter_hooks do
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
81 if new_filter_hooks[i] == callback then
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
82 t_remove(new_filter_hooks, i);
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
83 end
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
84 end
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
85 end
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
86
3331
57a9cf5f4259 util.filters: Add newline at end of file
Matthew Wild <mwild1@gmail.com>
parents: 3142
diff changeset
87 return _M;