2021-07-24 10:03:36 +01:00
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use std::{
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collections::{BTreeMap, HashSet},
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fs::{self, File},
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path::Path,
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};
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use base64::encode;
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use comfy_table::{Attribute, Cell, CellAlignment, Color, ContentArrangement, Table};
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use html5ever::{LocalName, Namespace, QualName};
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use indicatif::{ProgressBar, ProgressStyle};
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use kuchiki::{traits::*, NodeRef};
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use log::{debug, error, info};
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use crate::{
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cli::{self, AppConfig},
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errors::PaperoniError,
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extractor::Article,
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2021-07-24 10:03:36 +01:00
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moz_readability::MetaData,
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};
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const HEAD_ELEM_NOT_FOUND: &str =
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"Unable to get <head> element to inline css. Ensure that the root node is the HTML document.";
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const BASE_HTML_TEMPLATE: &str = r#"<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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</head>
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<body></body>
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</html>"#;
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pub fn generate_html_exports(
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articles: Vec<Article>,
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app_config: &AppConfig,
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successful_articles_table: &mut Table,
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) -> Result<(), Vec<PaperoniError>> {
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if articles.is_empty() {
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return Ok(());
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}
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let bar = if app_config.can_disable_progress_bar {
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ProgressBar::hidden()
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} else {
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let enabled_bar = ProgressBar::new(articles.len() as u64);
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let style = ProgressStyle::default_bar().template(
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"{spinner:.cyan} [{elapsed_precise}] {bar:40.white} {:>8} html {pos}/{len:7} {msg:.green}",
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);
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enabled_bar.set_style(style);
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if !articles.is_empty() {
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enabled_bar.set_message("Generating html files");
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}
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enabled_bar
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};
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let mut errors: Vec<PaperoniError> = Vec::new();
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match app_config.merged {
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Some(ref name) => {
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successful_articles_table.set_header(vec![Cell::new("Table of Contents")
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.add_attribute(Attribute::Bold)
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.set_alignment(CellAlignment::Center)
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.fg(Color::Green)]);
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debug!("Creating {:?}", name);
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let base_html_elem = kuchiki::parse_html().one(BASE_HTML_TEMPLATE);
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let body_elem = base_html_elem.select_first("body").unwrap();
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let base_path = Path::new(app_config.output_directory.as_deref().unwrap_or("."));
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let img_dirs_path_name = name.trim_end_matches(".html");
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let imgs_dir_path = base_path.join(img_dirs_path_name);
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if !(app_config.is_inlining_images || imgs_dir_path.exists()) {
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info!("Creating imgs dir in {:?} for {}", imgs_dir_path, name);
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if let Err(e) = std::fs::create_dir(&imgs_dir_path) {
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error!("Unable to create imgs dir for HTML file");
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let err: PaperoniError = e.into();
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errors.push(err);
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return Err(errors);
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};
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}
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for (idx, article) in articles.iter().enumerate() {
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let article_elem = article
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.node_ref()
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.select_first("div[id=\"readability-page-1\"]")
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.unwrap();
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let title = article.metadata().title();
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let mut elem_attr = article_elem.attributes.borrow_mut();
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if let Some(id_attr) = elem_attr.get_mut("id") {
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*id_attr = format!("readability-page-{}", idx);
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}
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for (img_url, mime_type_opt) in &article.img_urls {
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if app_config.is_inlining_images {
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info!("Inlining images for {}", title);
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let result = update_imgs_base64(
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article,
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img_url,
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mime_type_opt.as_deref().unwrap_or("image/*"),
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);
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if let Err(e) = result {
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let mut err: PaperoniError = e.into();
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err.set_article_source(title);
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error!("Unable to copy images to imgs dir for {}", title);
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errors.push(err);
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}
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info!("Completed inlining images for {}", title);
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} else {
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info!("Copying images to imgs dir for {}", title);
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let result = update_img_urls(article, &imgs_dir_path).map_err(|e| {
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let mut err: PaperoniError = e.into();
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err.set_article_source(title);
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err
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});
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if let Err(e) = result {
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error!("Unable to copy images to imgs dir for {}", title);
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errors.push(e);
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} else {
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info!("Successfully copied images to imgs dir for {}", title);
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}
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}
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}
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bar.inc(1);
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successful_articles_table.add_row(vec![title]);
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body_elem.as_node().append(article_elem.as_node().clone());
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debug!("Added {} to the export HTML file", title);
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}
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insert_title_elem(&base_html_elem, name);
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insert_appendix(
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&base_html_elem,
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articles
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.iter()
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.map(|article| (article.metadata(), article.url.as_str()))
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.collect(),
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);
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inline_css(&base_html_elem, app_config);
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info!("Added title, footer and inlined styles for {}", name);
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info!("Creating export HTML file: {}", name);
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if let Err(mut err) = File::create(name)
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.and_then(|mut out_file| base_html_elem.serialize(&mut out_file))
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.map_err(|e| -> PaperoniError { e.into() })
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{
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error!("Failed to serialize articles to file: {}", name);
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err.set_article_source(&name);
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errors.push(err);
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bar.finish_with_message("html generation failed");
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return Err(errors);
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};
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bar.finish_with_message("Generated html file\n");
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debug!("Created {:?}", name);
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println!("Created {:?}", name);
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}
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None => {
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successful_articles_table
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.set_header(vec![Cell::new("Downloaded articles")
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.add_attribute(Attribute::Bold)
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.set_alignment(CellAlignment::Center)
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.fg(Color::Green)])
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.set_content_arrangement(ContentArrangement::Dynamic);
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let mut file_names: HashSet<String> = HashSet::new();
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for article in &articles {
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let mut file_name = format!(
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"{}/{}.html",
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app_config.output_directory.as_deref().unwrap_or("."),
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article
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.metadata()
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.title()
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.replace("/", " ")
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.replace("\\", " ")
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);
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if file_names.contains(&file_name) {
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info!("Article name {:?} already exists", file_name);
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file_name = format!(
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"{}/{}_{}.html",
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app_config.output_directory.as_deref().unwrap_or("."),
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article
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.metadata()
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.title()
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.replace("/", " ")
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.replace("\\", " "),
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file_names.len()
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);
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info!("Renamed to {:?}", file_name);
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}
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file_names.insert(file_name.clone());
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debug!("Creating {:?}", file_name);
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let export_article = || -> Result<(), PaperoniError> {
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let mut out_file = File::create(&file_name)?;
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if app_config.is_inlining_images {
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for (img_url, mime_type_opt) in &article.img_urls {
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update_imgs_base64(
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article,
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img_url,
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mime_type_opt.as_deref().unwrap_or("image/*"),
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)?
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}
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} else {
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let base_path =
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Path::new(app_config.output_directory.as_deref().unwrap_or("."));
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let imgs_dir_name = article.metadata().title();
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if !base_path.join(imgs_dir_name).exists() {
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std::fs::create_dir(base_path.join(imgs_dir_name))?;
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}
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let imgs_dir_path = base_path.join(imgs_dir_name);
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update_img_urls(article, &imgs_dir_path)?;
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}
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let utf8_encoding =
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NodeRef::new_element(create_qualname("meta"), BTreeMap::new());
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if let Some(elem_node) = utf8_encoding.as_element() {
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let mut elem_attrs = elem_node.attributes.borrow_mut();
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elem_attrs.insert("charset", "UTF-8".into());
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}
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if let Ok(head_elem) = article.node_ref().select_first("head") {
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let head_elem_node = head_elem.as_node();
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head_elem_node.append(utf8_encoding);
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};
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2021-07-24 10:43:40 +01:00
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insert_title_elem(article.node_ref(), article.metadata().title());
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insert_appendix(article.node_ref(), vec![(article.metadata(), &article.url)]);
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inline_css(article.node_ref(), app_config);
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2021-07-24 10:43:40 +01:00
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article.node_ref().serialize(&mut out_file)?;
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Ok(())
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};
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if let Err(mut err) = export_article() {
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err.set_article_source(&article.url);
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errors.push(err);
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}
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debug!("Created {:?}", file_name);
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bar.inc(1);
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successful_articles_table.add_row(vec![article.metadata().title()]);
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}
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bar.finish_with_message("Generated HTML files\n");
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}
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}
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if errors.is_empty() {
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Ok(())
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} else {
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Err(errors)
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}
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}
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fn create_qualname(name: &str) -> QualName {
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QualName::new(
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None,
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Namespace::from("http://www.w3.org/1999/xhtml"),
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LocalName::from(name),
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)
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}
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/// Updates the src attribute of `<img>` elements with a base64 encoded string of the image data
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fn update_imgs_base64(
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article: &Article,
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img_url: &str,
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mime_type: &str,
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) -> Result<(), std::io::Error> {
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let temp_dir = std::env::temp_dir();
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let img_path = temp_dir.join(img_url);
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let img_bytes = std::fs::read(img_path)?;
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let img_base64_str = format!("data:image:{};base64,{}", mime_type, encode(img_bytes));
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let img_elems = article
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.node_ref()
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.select(&format!("img[src=\"{}\"]", img_url))
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.unwrap();
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for img_elem in img_elems {
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let mut img_attr = img_elem.attributes.borrow_mut();
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if let Some(src_attr) = img_attr.get_mut("src") {
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*src_attr = img_base64_str.clone();
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}
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}
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Ok(())
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}
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/// Updates the src attribute of `<img>` elements to the new `imgs_dir_path` and copies the image to the new file location
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2021-07-24 10:43:40 +01:00
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fn update_img_urls(article: &Article, imgs_dir_path: &Path) -> Result<(), std::io::Error> {
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let temp_dir = std::env::temp_dir();
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for (img_url, _) in &article.img_urls {
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let (from, to) = (temp_dir.join(img_url), imgs_dir_path.join(img_url));
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info!("Copying {:?} to {:?}", from, to);
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fs::copy(from, to)?;
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let img_elems = article
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.node_ref()
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.select(&format!("img[src=\"{}\"]", img_url))
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.unwrap();
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for img_elem in img_elems {
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let mut img_attr = img_elem.attributes.borrow_mut();
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if let Some(src_attr) = img_attr.get_mut("src") {
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*src_attr = imgs_dir_path.join(img_url).to_str().unwrap().into();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
Ok(())
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// Creates a `<title>` element in an HTML document with the value set to the article's title
|
|
|
|
|
fn insert_title_elem(root_node: &NodeRef, title: &str) {
|
|
|
|
|
let title_content = NodeRef::new_text(title);
|
|
|
|
|
let title_elem = NodeRef::new_element(create_qualname("title"), BTreeMap::new());
|
|
|
|
|
title_elem.append(title_content);
|
|
|
|
|
match root_node.select_first("head") {
|
|
|
|
|
Ok(head_elem) => {
|
|
|
|
|
head_elem.as_node().append(title_elem);
|
|
|
|
|
}
|
|
|
|
|
Err(_) => {
|
|
|
|
|
debug!("{}", HEAD_ELEM_NOT_FOUND);
|
|
|
|
|
let html_elem = root_node.select_first("html").unwrap();
|
|
|
|
|
let head_elem = NodeRef::new_element(create_qualname("head"), BTreeMap::new());
|
|
|
|
|
head_elem.append(title_elem);
|
|
|
|
|
html_elem.as_node().prepend(head_elem);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// Creates the appendix in an HTML document where article sources are added in a `<footer>` element
|
|
|
|
|
fn insert_appendix(root_node: &NodeRef, article_links: Vec<(&MetaData, &str)>) {
|
|
|
|
|
let link_tags: String = article_links
|
|
|
|
|
.iter()
|
|
|
|
|
.map(|(meta_data, url)| {
|
|
|
|
|
let article_name = if !meta_data.title().is_empty() {
|
|
|
|
|
meta_data.title()
|
|
|
|
|
} else {
|
|
|
|
|
url
|
|
|
|
|
};
|
|
|
|
|
format!("<a href=\"{}\">{}</a><br></br>", url, article_name)
|
|
|
|
|
})
|
|
|
|
|
.collect();
|
|
|
|
|
let footer_inner_html = format!("<h2>Appendix</h2><h2>Article sources</h3>{}", link_tags);
|
|
|
|
|
let footer_elem =
|
|
|
|
|
kuchiki::parse_fragment(create_qualname("footer"), Vec::new()).one(footer_inner_html);
|
|
|
|
|
root_node.append(footer_elem);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// Inlines the CSS stylesheets into the HTML article node
|
|
|
|
|
fn inline_css(root_node: &NodeRef, app_config: &AppConfig) {
|
|
|
|
|
let body_stylesheet = include_str!("./assets/body.min.css");
|
|
|
|
|
let header_stylesheet = include_str!("./assets/headers.min.css");
|
|
|
|
|
let mut css_str = String::new();
|
|
|
|
|
match app_config.css_config {
|
|
|
|
|
cli::CSSConfig::NoHeaders => {
|
|
|
|
|
css_str.push_str(body_stylesheet);
|
|
|
|
|
}
|
|
|
|
|
cli::CSSConfig::All => {
|
|
|
|
|
css_str.push_str(body_stylesheet);
|
|
|
|
|
css_str.push_str(header_stylesheet);
|
|
|
|
|
}
|
|
|
|
|
cli::CSSConfig::None => {
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
let css_html_str = format!("<style>{}</style>", css_str);
|
|
|
|
|
let style_container =
|
|
|
|
|
kuchiki::parse_fragment(create_qualname("div"), Vec::new()).one(css_html_str);
|
|
|
|
|
let style_elem = style_container.select_first("style").unwrap();
|
|
|
|
|
match root_node.select_first("head") {
|
|
|
|
|
Ok(head_elem) => {
|
|
|
|
|
head_elem.as_node().prepend(style_elem.as_node().to_owned());
|
|
|
|
|
}
|
|
|
|
|
Err(_) => {
|
|
|
|
|
debug!("{}", HEAD_ELEM_NOT_FOUND);
|
|
|
|
|
let html_elem = root_node.select_first("html").unwrap();
|
|
|
|
|
let head_elem = NodeRef::new_element(create_qualname("head"), BTreeMap::new());
|
|
|
|
|
head_elem.prepend(style_elem.as_node().to_owned());
|
|
|
|
|
html_elem.as_node().prepend(head_elem);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Remove the <link> of the stylesheet since styles are now inlined
|
|
|
|
|
if let Ok(style_link_elem) = root_node.select_first("link[href=\"stylesheet.css\"]") {
|
|
|
|
|
style_link_elem.as_node().detach();
|
|
|
|
|
};
|
|
|
|
|
}
|
