prosody
77f900bbbf25
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 @ 10226:77f900bbbf25

Remove COMPAT with temporary luasec fork The changes in the temporary fork were merged into mainline luasec ca 2013 and included in the 0.5 release in 2014.
author Kim Alvefur <zash@zash.se>
date Sun, 25 Aug 2019 23:12:55 +0200
parent 8555:4f0f5b49bb03
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
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
11 local _ENV = nil;
8555
4f0f5b49bb03 vairious: Add annotation when an empty environment is set [luacheck]
Kim Alvefur <zash@zash.se>
parents: 6777
diff changeset
12 -- luacheck: std none
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
13
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
14 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
15
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
16 local 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
17 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
18 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
19 session.filters = filters;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
20
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
21 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
22 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
23 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
24 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
25 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
26 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
27 end
3139
7b4f180d7c6f util.filters: Don't traceback with no filters of a type added
Matthew Wild <mwild1@gmail.com>
parents: 3135
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 data;
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 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
32
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
33 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
34 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
35 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
36
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
37 return session.filter;
3133
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
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
40 local function add_filter(session, type, callback, priority)
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
41 if not session.filters then
3134
9a29ad6a9b97 util.filters: Expose the initialization function
Matthew Wild <mwild1@gmail.com>
parents: 3133
diff changeset
42 initialize(session);
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
43 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
44
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
45 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
46 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
47 filter_list = {};
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48 session.filters[type] = filter_list;
6366
8dee696c33cc util.filters: Ignore filters being added twice (fixes issues on removal)
Matthew Wild <mwild1@gmail.com>
parents: 5849
diff changeset
49 elseif filter_list[callback] then
8dee696c33cc util.filters: Ignore filters being added twice (fixes issues on removal)
Matthew Wild <mwild1@gmail.com>
parents: 5849
diff changeset
50 return; -- Filter already added
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
51 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
52
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
53 priority = priority or 0;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 3943
diff changeset
54
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
55 local i = 0;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
56 repeat
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
57 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
58 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
59
3133
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
60 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
61 filter_list[callback] = priority;
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
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
64 local 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
65 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
66 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
67 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
68 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
69 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
70 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
71 filter_list[callback] = nil;
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
72 return true;
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 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
75 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
76 end
d3f16b4c1ecb util.filters: New utility library for managing filters on an object
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
77
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
78 local function add_filter_hook(callback)
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
79 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
80 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
81
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
82 local function remove_filter_hook(callback)
3943
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
83 for i=1,#new_filter_hooks do
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
84 if new_filter_hooks[i] == callback then
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
85 t_remove(new_filter_hooks, i);
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
86 end
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
87 end
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
88 end
ad5924c31953 util.filters: Add remove_filter_hook()
Matthew Wild <mwild1@gmail.com>
parents: 3625
diff changeset
89
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
90 return {
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
91 initialize = initialize;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
92 add_filter = add_filter;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
93 remove_filter = remove_filter;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
94 add_filter_hook = add_filter_hook;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
95 remove_filter_hook = remove_filter_hook;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
96 };