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util/filters.lua @ 12580:a9dbf657c894 0.12
util.datamapper: Improve handling of schemas with non-obvious "type"
The JSON Schema specification says that schemas are objects or booleans,
and that the 'type' property is optional and can be an array.
This module previously allowed bare type names as schemas and did not
really handle booleans.
It now handles missing 'type' properties and boolean 'true' as a schema.
Objects and arrays are guessed based on the presence of 'properties' or
'items' field.
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 08 Jul 2022 17:32:48 +0200 |
parent | 8555:4f0f5b49bb03 |
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-- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local t_insert, t_remove = table.insert, table.remove; local _ENV = nil; -- luacheck: std none local new_filter_hooks = {}; local function initialize(session) if not session.filters then local filters = {}; session.filters = filters; function session.filter(type, data) local filter_list = filters[type]; if filter_list then for i = 1, #filter_list do data = filter_list[i](data, session); if data == nil then break; end end end return data; end end for i=1,#new_filter_hooks do new_filter_hooks[i](session); end return session.filter; end local function add_filter(session, type, callback, priority) if not session.filters then initialize(session); end local filter_list = session.filters[type]; if not filter_list then filter_list = {}; session.filters[type] = filter_list; elseif filter_list[callback] then return; -- Filter already added end priority = priority or 0; local i = 0; repeat i = i + 1; until not filter_list[i] or filter_list[filter_list[i]] < priority; t_insert(filter_list, i, callback); filter_list[callback] = priority; end local function remove_filter(session, type, callback) if not session.filters then return; end local filter_list = session.filters[type]; if filter_list and filter_list[callback] then for i=1, #filter_list do if filter_list[i] == callback then t_remove(filter_list, i); filter_list[callback] = nil; return true; end end end end local function add_filter_hook(callback) t_insert(new_filter_hooks, callback); end local function remove_filter_hook(callback) for i=1,#new_filter_hooks do if new_filter_hooks[i] == callback then t_remove(new_filter_hooks, i); end end end return { initialize = initialize; add_filter = add_filter; remove_filter = remove_filter; add_filter_hook = add_filter_hook; remove_filter_hook = remove_filter_hook; };