mod_log_ringbuffer: Detach event handlers on logging reload (thanks Menel)
Otherwise the global event handlers accumulate, one added each time
logging is reoladed, and each invocation of the signal or event triggers
one dump of each created ringbuffer.
local st = require "stanza";
local urlencode = require "net.http".urlencode;
local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im";
local xmlns_xhtml = "http://www.w3.org/1999/xhtml";
local function replace_latex(data)
local origin, stanza = data.origin, data.stanza;
local body = stanza:get_child_text("body");
if not body or not body:match("%$%$") then
return;
end
module:log("debug", "Replacing latex...");
local html = st.stanza("html", { xmlns = xmlns_xhtmlim })
:tag("body", { xmlns = xmlns_xhtml });
local in_latex, last_char;
for snippet, up_to in body:gmatch("(.-)%$%$()") do
last_char = up_to;
if in_latex then
-- Render latex and add image, next snippet is text
in_latex = nil;
html:tag("img", { src = "http://www.mathtran.org/cgi-bin/mathtran?D=2;tex="..urlencode(snippet), alt = snippet }):up();
else
-- Add text to HTML, next snippet is latex
in_latex = true;
html:tag("span"):text(snippet):up();
end
end
if last_char < #body then
html:tag("span"):text(body:sub(last_char, #body)):up();
end
for n, tag in ipairs(stanza.tags) do
module:log("debug", "Tag: %s|%s", tag.attr.xmlns or "", tag.name or "");
if tag.name == "html" and tag.attr.xmlns == xmlns_xhtmlim then
stanza.tags[n] = html;
for n, child in ipairs(stanza) do
if child == tag then
stanza[n] = html;
end
end
return;
end
end
stanza[#stanza+1] = html;
stanza.tags[#stanza.tags+1] = html;
end
module:hook("message/bare", replace_latex, 30);
module:hook("message/full", replace_latex, 30);