#include "ConfigFile.h"
#include "Regex.h"

ConfigFile::ConfigFile(Handle * f) throw (GeneralException) {
    Regex r("^\\[.*\\]$"), comment("^#.*$"), empty("^ *$"), line("^.*=.*$");
    bool started = false;
    String s, section, key, value;
    ConfigSectionContents contents;
    int pos;
    
    while (!f->IsClosed()) {
	(*f) >> s;
	if (comment.Match(s) || empty.Match(s))
	    continue;
	if (r.Match(s)) {
	    if (!started) {
	        started = true;
	    } else {
		c[section] = contents;
		contents.clear();
	    }
	    section = s.extract(1, s.strlen() - 2);
	    continue;
	}
	if (line.Match(s)) {
	    if (!started) {
		throw GeneralException("Config file must begin with a section");
	    }
	    pos = s.strchr('=');
	    key = s.extract(0, pos - 1).trim();
	    value = s.extract(pos + 1).trim();
	    contents[key] = value;
	    continue;
	}
	throw GeneralException("Invalid line: " + s);
    }
    
    c[section] = contents;
}

ConfigSectionContents & ConfigFile::operator[](String s) {
    return c[s];
}