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// This file is part of rss.
//
// Copyright © 2015-2021 The rust-syndication Developers
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the MIT License and/or Apache 2.0 License.
use std::io::{BufRead, Write};
use quick_xml::events::attributes::Attributes;
use quick_xml::events::{BytesEnd, BytesStart, BytesText, Event};
use quick_xml::Error as XmlError;
use quick_xml::Reader;
use quick_xml::Writer;
use crate::error::Error;
use crate::toxml::ToXml;
use crate::util::{attr_value, decode, element_text};
/// Represents the source of an RSS item.
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[derive(Debug, Default, Clone, PartialEq)]
#[cfg_attr(feature = "builders", derive(Builder))]
#[cfg_attr(
feature = "builders",
builder(
setter(into),
default,
build_fn(name = "build_impl", private, error = "never::Never")
)
)]
pub struct Source {
/// The URL of the source.
pub url: String,
/// The title of the source.
pub title: Option<String>,
}
impl Source {
/// Return the URL of this source.
///
/// # Examples
///
/// ```
/// use rss::Source;
///
/// let mut source = Source::default();
/// source.set_url("http://example.com");
/// assert_eq!(source.url(), "http://example.com");
/// ```
pub fn url(&self) -> &str {
self.url.as_str()
}
/// Set the URL of this source.
///
/// # Examples
///
/// ```
/// use rss::Source;
///
/// let mut source = Source::default();
/// source.set_url("http://example.com");
/// ```
pub fn set_url<V>(&mut self, url: V)
where
V: Into<String>,
{
self.url = url.into();
}
/// Return the title of this source.
///
/// # Examples
///
/// ```
/// use rss::Source;
///
/// let mut source = Source::default();
/// source.set_title("Source Title".to_string());
/// assert_eq!(source.title(), Some("Source Title"));
/// ```
pub fn title(&self) -> Option<&str> {
self.title.as_deref()
}
/// Set the title of this source.
///
/// # Examples
///
/// ```
/// use rss::Source;
///
/// let mut source = Source::default();
/// source.set_title("Source Title".to_string());
/// ```
pub fn set_title<V>(&mut self, title: V)
where
V: Into<Option<String>>,
{
self.title = title.into();
}
}
impl Source {
/// Builds a Source from source XML
pub fn from_xml<R: BufRead>(
reader: &mut Reader<R>,
mut atts: Attributes,
) -> Result<Self, Error> {
let mut source = Source::default();
for attr in atts.with_checks(false).flatten() {
if decode(attr.key.as_ref(), reader)?.as_ref() == "url" {
source.url = attr_value(&attr, reader)?.to_string();
break;
}
}
source.title = element_text(reader)?;
Ok(source)
}
}
impl ToXml for Source {
fn to_xml<W: Write>(&self, writer: &mut Writer<W>) -> Result<(), XmlError> {
let name = "source";
let mut element = BytesStart::new(name);
element.push_attribute(("url", &*self.url));
writer.write_event(Event::Start(element))?;
if let Some(ref text) = self.title {
writer.write_event(Event::Text(BytesText::new(text)))?;
}
writer.write_event(Event::End(BytesEnd::new(name)))?;
Ok(())
}
}
#[cfg(feature = "builders")]
impl SourceBuilder {
/// Builds a new `Source`.
pub fn build(&self) -> Source {
self.build_impl().unwrap()
}
}