// Represents all functions for process the raw HTML and 
// extracting information from it, transforming it, etc.
// All fns operate on strings.

import std.algorithm : findSplitAfter, find;


// Given the haystack (the full HTML) search for the RSS comment
// representing that attribute.
string find_rss_comment(string attr, string haystack)
in (haystack !is null)
{
	immutable string needle = "<!-- rss-" ~ attr ~ ":"; 
	string found  = haystack.find(needle);

	if (found is null)
		return null;

	// As otherwise comment begin will be in `found`.
	found = found[needle.length .. $];

	// And get before the closing comment.
	string result = found.findSplitAfter("-->")[0];
	return result;
}

string find_html_title(string htmltext)
{
	// TODO: implement.
	immutable string init_tag = "<title>";
	string found = htmltext.find(init_tag);
	if (found is null)
		return null;

	found = found[init_tag.length .. $];
	string result = found.findSplitAfter("</title>")[0];
	return result;
}