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util/interpolation.lua @ 11545:7b8a482f4efd 0.11
MUC: Add support for advertising muc#roomconfig_allowinvites in room disco#info
The de-facto interpretation of this (undocumented) option is to indicate to
the client whether it is allowed to invite other users to the MUC.
This is differs from the existing option in our config form, which only
controls the behaviour of sending of invites in a members-only MUC (we always
allow invites in open rooms).
Conversations is one client known to use this disco#info item to determine
whether it may send invites.
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 10 May 2021 17:01:38 +0100 |
parent | 11306:5798ab735619 |
child | 11307:f2e276bb4ef8 |
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-- Simple template language -- -- The new() function takes a pattern and an escape function and returns -- a render() function. Both are required. -- -- The function render() takes a string template and a table of values. -- Sequences like {name} in the template string are substituted -- with values from the table, optionally depending on a modifier -- symbol. -- -- Variants are: -- {name} is substituted for values["name"] and is escaped using the -- second argument to new_render(). To disable the escaping, use {name!}. -- {name.item} can be used to access table items. -- To renter lists of items: {name# item number {idx} is {item} } -- Or key-value pairs: {name% t[ {idx} ] = {item} } -- To show a defaults for missing values {name? sub-template } can be used, -- which renders a sub-template if values["name"] is false-ish. -- {name& sub-template } does the opposite, the sub-template is rendered -- if the selected value is anything but false or nil. local type, tostring = type, tostring; local pairs, ipairs = pairs, ipairs; local s_sub, s_gsub, s_match = string.sub, string.gsub, string.match; local t_concat = table.concat; local function new_render(pat, escape, funcs) -- assert(type(pat) == "string", "bad argument #1 to 'new_render' (string expected)"); -- assert(type(escape) == "function", "bad argument #2 to 'new_render' (function expected)"); local function render(template, values) -- assert(type(template) == "string", "bad argument #1 to 'render' (string expected)"); -- assert(type(values) == "table", "bad argument #2 to 'render' (table expected)"); return (s_gsub(template, pat, function (block) block = s_sub(block, 2, -2); local name, raw, opt, e = s_match(block, "^([%a_][%w_.]*)(!?)(%p?)()"); if not name then return end local value = values[name]; if not value and name:find(".", 2, true) then value = values; for word in name:gmatch"[^.]+" do value = value[word]; if not value then break; end end end if funcs then while opt == '|' do local f; f, raw, opt, e = s_match(block, "^([%a_][%w_.]*)(!?)(%p?)()", e); f = funcs[f]; if value ~= nil and f then value = f(value); end end end if opt == '#' or opt == '%' then if type(value) ~= "table" then return ""; end local iter = opt == '#' and ipairs or pairs; local out, i, subtpl = {}, 1, s_sub(block, e); local subvalues = setmetatable({}, { __index = values }); for idx, item in iter(value) do subvalues.idx = idx; subvalues.item = item; out[i], i = render(subtpl, subvalues), i+1; end return t_concat(out); elseif opt == '&' then if not value then return ""; end return render(s_sub(block, e), values); elseif opt == '?' and not value then return render(s_sub(block, e), values); elseif value ~= nil then if type(value) ~= "string" then value = tostring(value); end if raw ~= '!' then return escape(value); end return value; end end)); end return render; end return { new = new_render; };