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prosody
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util/interpolation.lua @ 11717:605484fc1c62
mod_pubsub: Normalize 'publisher' JID
All the XEP-0060 examples have the publisher attribute set to a bare
JID, but the text does allow it to be the full JID.
Since mod_pubsub is more likely used for open nodes that anyone can
subscribe to it makes sense to not leak the full JIDs. This is also
disabled by defaults.
In mod_pep on the other hand it might make sense to have the full JID
since that data is more likely to be broadcast to contacts which are
already somewhat trusted.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sun, 25 Jul 2021 14:01:45 +0200 |
parent | 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 == '~' then if 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; };