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// headerFooter
use quick_xml::events::{BytesStart, Event};
use quick_xml::Reader;
use quick_xml::Writer;
use std::io::Cursor;
use structs::OddFooter;
use structs::OddHeader;
use writer::driver::*;

#[derive(Clone, Default, Debug)]
pub struct HeaderFooter {
    odd_header: OddHeader,
    odd_footer: OddFooter,
}
impl HeaderFooter {
    pub fn get_odd_header(&self) -> &OddHeader {
        &self.odd_header
    }

    pub fn get_odd_header_mut(&mut self) -> &mut OddHeader {
        &mut self.odd_header
    }

    pub fn set_odd_header(&mut self, value: OddHeader) -> &mut Self {
        self.odd_header = value;
        self
    }

    pub fn get_odd_footer(&self) -> &OddFooter {
        &self.odd_footer
    }

    pub fn get_odd_footer_mut(&mut self) -> &mut OddFooter {
        &mut self.odd_footer
    }

    pub fn set_odd_footer(&mut self, value: OddFooter) -> &mut Self {
        self.odd_footer = value;
        self
    }

    pub(crate) fn has_param(&self) -> bool {
        if self.odd_header.has_param() {
            return true;
        }
        if self.odd_footer.has_param() {
            return true;
        }
        false
    }

    pub(crate) fn set_attributes<R: std::io::BufRead>(
        &mut self,
        reader: &mut Reader<R>,
        _e: &BytesStart,
    ) {
        let mut buf = Vec::new();
        loop {
            match reader.read_event(&mut buf) {
                Ok(Event::Start(ref e)) => match e.name() {
                    b"oddHeader" => {
                        self.odd_header.set_attributes(reader, e);
                    }
                    b"oddFooter" => {
                        self.odd_footer.set_attributes(reader, e);
                    }
                    _ => (),
                },
                Ok(Event::End(ref e)) => match e.name() {
                    b"headerFooter" => return,
                    _ => (),
                },
                Ok(Event::Eof) => panic!("Error not find {} end element", "headerFooter"),
                Err(e) => panic!("Error at position {}: {:?}", reader.buffer_position(), e),
                _ => (),
            }
            buf.clear();
        }
    }

    pub(crate) fn write_to(&self, writer: &mut Writer<Cursor<Vec<u8>>>) {
        if self.has_param() {
            // headerFooter
            write_start_tag(writer, "headerFooter", vec![], false);

            // oddHeader
            let _ = &self.get_odd_header().write_to(writer);

            // oddFooter
            let _ = &self.get_odd_footer().write_to(writer);

            write_end_tag(writer, "headerFooter");
        }
    }
}