Annotate

util/filters.lua @ 10047:177a8b92204b

mod_pep: Log node name instead of payload Having the node logged is more useful and less problematic for privacy
author Kim Alvefur <zash@zash.se>
date Sun, 16 Jun 2019 22:02:53 +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 };