lectito 0.3.0

Article extraction and readability parsing for Lectito.
Documentation 
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use std::collections::HashMap;

use kuchiki::NodeRef;
use kuchiki::traits::TendrilSink;

use super::patterns;

pub fn inner_text(node: &NodeRef) -> String {
    patterns::normalize_spaces(node.text_contents().trim())
}

pub fn is_kuchiki_visible(node: &NodeRef) -> bool {
    if attr(node, "hidden").is_some() {
        return false;
    }
    if patterns::has_display_none(attr(node, "style").as_deref()) {
        return false;
    }
    if attr(node, "aria-hidden").as_deref() == Some("true")
        && !attr(node, "class").is_some_and(|class| class.contains("fallback-image"))
    {
        return false;
    }
    true
}

pub fn has_unlikely_role(node: &NodeRef) -> bool {
    matches!(
        attr(node, "role").as_deref(),
        Some("menu" | "menubar" | "complementary" | "navigation" | "alert" | "alertdialog" | "dialog")
    )
}

pub fn has_ancestor_tag(node: &NodeRef, tag: &str, max_depth: usize) -> bool {
    for (depth, ancestor) in node
        .ancestors()
        .filter(|node| node.as_element().is_some())
        .skip(1)
        .enumerate()
    {
        if depth > max_depth {
            return false;
        }
        if node_name(&ancestor) == tag {
            return true;
        }
    }
    false
}

pub fn remove_matching(root: &NodeRef, selector: &str) {
    for node in select_nodes(root, selector) {
        node.detach();
    }
}

pub fn select_nodes(root: &NodeRef, selector: &str) -> Vec<NodeRef> {
    root.select(selector)
        .map(|nodes| nodes.map(|node| node.as_node().clone()).collect())
        .unwrap_or_default()
}

pub fn node_name(node: &NodeRef) -> String {
    node.as_element()
        .map(|element| element.name.local.to_string())
        .unwrap_or_default()
}

pub fn class_id_string(node: &NodeRef) -> String {
    format!(
        "{} {}",
        attr(node, "class").unwrap_or_default(),
        attr(node, "id").unwrap_or_default()
    )
}

pub fn attrs(node: &NodeRef) -> HashMap<String, String> {
    node.as_element()
        .map(|element| {
            element
                .attributes
                .borrow()
                .map
                .iter()
                .map(|(name, value)| (name.local.to_string(), value.value.clone()))
                .collect()
        })
        .unwrap_or_default()
}

pub fn attr(node: &NodeRef, name: &str) -> Option<String> {
    node.as_element()?.attributes.borrow().get(name).map(str::to_string)
}

pub fn set_attr(node: &NodeRef, name: &str, value: &str) {
    if let Some(element) = node.as_element() {
        element.attributes.borrow_mut().insert(name, value.to_string());
    }
}

pub fn remove_attr(node: &NodeRef, name: &str) {
    if let Some(element) = node.as_element() {
        element.attributes.borrow_mut().remove(name);
    }
}

pub fn retag_node(node: &NodeRef, tag: &str) -> Option<NodeRef> {
    let replacement_doc = kuchiki::parse_html().one(format!("<html><body><{tag}></{tag}></body></html>"));
    let replacement = select_nodes(&replacement_doc, tag).into_iter().next()?;

    for (name, value) in attrs(node) {
        set_attr(&replacement, &name, &value);
    }

    while let Some(child) = node.first_child() {
        replacement.append(child);
    }
    node.insert_before(replacement.clone());
    node.detach();
    Some(replacement)
}

pub fn replace_with_children(node: &NodeRef) {
    let children: Vec<_> = node.children().collect();
    for child in children {
        node.insert_before(child);
    }
    node.detach();
}

pub fn node_id(node: &NodeRef) -> usize {
    (&**node) as *const _ as usize
}