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|
use std::fmt::Display;
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct Elements
{
elements: Vec<Element>,
}
impl Elements
{
pub fn get_first_tagged(&self) -> Option<&Tagged>
{
self.elements.iter().find_map(|element| match element {
Element::Tagged(tagged_element) => Some(tagged_element),
_ => None,
})
}
pub fn get_first_tagged_with_name(&self, tag_name: &str) -> Option<&Tagged>
{
self.elements.iter().find_map(|element| match element {
Element::Tagged(tagged_element) if tagged_element.name == tag_name => {
Some(tagged_element)
}
_ => None,
})
}
pub fn get_all_tagged_elements(&self) -> Vec<&Tagged>
{
self.elements
.iter()
.filter_map(|element| match element {
Element::Tagged(tagged_element) => Some(tagged_element),
_ => None,
})
.collect()
}
pub fn get_all_tagged_elements_with_name(&self, tag_name: &str) -> Vec<&Tagged>
{
self.elements
.iter()
.filter_map(|element| match element {
Element::Tagged(tagged_element) if tagged_element.name == tag_name => {
Some(tagged_element)
}
_ => None,
})
.collect()
}
pub fn get_all_tagged_with_name_and_attr(
&self,
tag_name: &str,
attr_is_match: fn(&Attribute) -> bool,
) -> Vec<&Tagged>
{
self.elements
.iter()
.filter_map(|element| match element {
Element::Tagged(tagged_element)
if tagged_element.name == tag_name
&& tagged_element.attributes.iter().any(attr_is_match) =>
{
Some(tagged_element)
}
_ => None,
})
.collect()
}
pub fn get_first_text_element(&self) -> Option<&String>
{
self.elements.iter().find_map(|element| match element {
Element::Text(text) => Some(text),
_ => None,
})
}
pub fn get_all_text_elements(&self) -> Vec<&String>
{
self.elements
.iter()
.filter_map(|element| match element {
Element::Text(text) => Some(text),
_ => None,
})
.collect()
}
pub fn has_tagged_element(&self, tag_name: &str) -> bool
{
self.elements.iter().any(|element| {
matches!(
element,
Element::Tagged(tagged_element) if tagged_element.name == tag_name
)
})
}
}
impl<IntoIter: IntoIterator<Item = Element>> From<IntoIter> for Elements
{
fn from(into_iter: IntoIter) -> Self
{
Self {
elements: into_iter.into_iter().collect(),
}
}
}
impl<'elements> IntoIterator for &'elements Elements
{
type IntoIter = Iter<'elements>;
type Item = &'elements Element;
fn into_iter(self) -> Self::IntoIter
{
Self::IntoIter {
elements: self.elements.iter(),
}
}
}
pub struct Iter<'elements>
{
elements: std::slice::Iter<'elements, Element>,
}
impl<'elements> Iterator for Iter<'elements>
{
type Item = &'elements Element;
fn next(&mut self) -> Option<Self::Item>
{
self.elements.next()
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
pub enum Element
{
Tagged(Tagged),
Text(String),
Comment(String),
}
impl Display for Element
{
fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result
{
match self {
Self::Tagged(tagged) => tagged.fmt(formatter),
Self::Text(text) => text.fmt(formatter),
Self::Comment(comment) => {
formatter.write_fmt(format_args!("<!--{comment}-->"))
}
}
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct Tagged
{
name: String,
child_elements: Elements,
attributes: Vec<Attribute>,
}
impl Display for Tagged
{
fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result
{
let name = &self.name;
let attrs = self
.attributes
.iter()
.map(|attr| {
format!("{}=\"{}\" ", attr.key, String::from_utf8_lossy(&attr.value))
})
.collect::<String>();
let child_elements = self
.child_elements
.into_iter()
.map(ToString::to_string)
.collect::<String>();
formatter.write_fmt(format_args!("<{name} {attrs}>{child_elements}</{name}>",))
}
}
impl Tagged
{
pub fn new<Name, ChildElements, Attrs>(
name: &Name,
child_elements: ChildElements,
attributes: Attrs,
) -> Self
where
Name: ToString,
ChildElements: Into<Elements>,
Attrs: IntoIterator<Item = Attribute>,
{
Self {
name: name.to_string(),
child_elements: child_elements.into(),
attributes: attributes.into_iter().collect(),
}
}
pub fn name(&self) -> &str
{
&self.name
}
pub fn child_elements(&self) -> &Elements
{
&self.child_elements
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct Attribute
{
pub key: String,
pub value: Vec<u8>,
}
pub trait FromElements: Sized
{
type Error;
fn from_elements(elements: &Elements) -> Result<Self, Self::Error>;
}
|
