/**
* @brief method to render sections with a given map
*
* @param tmplate template std::string to render
* @param ctx map of values
*
* @return rendered std::string
*/
std::string template_t::render_sections(const std::string& tmplate,
const Context& ctx)
{
// initialize data structures
std::string ret = "";
std::string rest = "";
std::string::const_iterator start, end;
boost::match_results<std::string::const_iterator> matches;
start = tmplate.begin();
end = tmplate.end();
// return the whole template if no sections are found
if (!boost::regex_search(start, end, matches, section,
boost::match_default | boost::format_all))
{
ret = tmplate;
}
// loop through sections and render
while (boost::regex_search(start, end, matches, section,
boost::match_default | boost::format_all))
{
// std::string assignments
std::string text(start, matches[0].second);
std::string key(matches[2].first, matches[2].second);
std::string modifier(matches[1]);
// trimming
boost::algorithm::trim(key);
boost::algorithm::trim(modifier);
std::string repl = "";
std::string show = "false";
CollectionType values;
values = ctx.get(key);
if (values.size() == 1)
{
// if we don't have a collection, we find the key and an
// empty map bucket means false
if (values[0].find(key) != values[0].end())
{
show = values[0][key] != "" ? values[0][key] : "false";
}
// if we have a collection, we want to show it if there is
// something to show
else
{
show = values[0].size() > 0 ? "true" : "false";
}
}
else if(values.size() > 1)
{
show = "true";
}
// inverted section?
if (modifier == "^" && show == "false") show = "true";
else if (modifier == "^" && show == "true") show = "false";
// assign replacement content
if (show == "true")
{
if (boost::regex_search(matches[3].first, matches[3].second, section,
boost::match_default | boost::format_all))
{
repl.assign(template_t::render_sections(matches[3], ctx));
}
else
{
for(CollectionType::iterator it = values.begin();
it != values.end(); ++it)
{
Context small_ctx;
small_ctx = ctx;
small_ctx.add(*it);
repl += template_t::render_tags(matches[3], small_ctx);
}
}
}
else repl.assign("");
ret += boost::regex_replace(text, section, repl,
boost::match_default | boost::format_all);
rest.assign(matches[0].second, end);
start = matches[0].second;
}
// append and return
ret += rest;
return ret;
}
