# API:
#   XmlPath    : string
#   XmlAttr    : dict : [XmlPath, string] -> string
#   XmlPayload : string

/^[\(\)]/ {
    update_node()
    next
}

/^A/ && $2 == "CDATA" {
    update_node_attributes()
    next
}

/^-/ {
    XmlPayload = substr($0, 2, length($0))
}

function path_to_string(path, depth,    p, i) {
    p = ""
    for (i = 1; i <= depth; i++) {
        p = p "/" path[i]
    }
    return p
}

function update_node(    paren, name, key, val, path, attr) {
    paren = substr($1, 1, 1)
    name = substr($1, 2, length($1) - 1)
    if (paren == "(") {
        _depth++
        _path[_depth] = name
        XmlPath = path_to_string(_path, _depth)
        for (key in _hxpipe_curr_attrs) {
            val = _hxpipe_curr_attrs[key]
            XmlAttr[XmlPath, key] = val
        }
    } else if (paren == ")") {
        delete _hxpipe_curr_attrs
        XmlPayload = ""
        for (key in XmlAttr) {
            split(key, k, SUBSEP)
            path = k[1]
            attr = k[2]
            if (path == XmlPath) delete XmlAttr[key]
        }
        _depth--
        XmlPath = path_to_string(_path, _depth)
    } else {
        printf("ERROR in input line %d - not a parenthesis: \"%s\"\n", NR, paren) > "/dev/stderr"
        exit 1
    }
}

function update_node_attributes(    key, val, s) {
    key = substr($1, 2, length($1))
    val = $0
    s = " +"
    sub("^" $1 s $2 s, "", val)
    _hxpipe_curr_attrs[key] = val
}