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use std::env;
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use xml::{Event, Parser};
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use std::fs::File;
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use std::io::prelude::*;
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use std::path::Path;
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use slug::slugify;
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enum CurrentTag {
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Title,
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Data
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}
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#[derive(Default)]
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struct State {
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tag: Option<CurrentTag>,
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title: Option<String>,
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filename: Option<String>
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}
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impl State {
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pub fn new() -> Self {
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Self { tag: None, title: None, filename: None }
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}
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pub fn with_title(self, title:String) -> Self {
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Self { title: Some(title.to_string()),
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..Default::default() }
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}
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pub fn with_filename(self, filename: String) -> Self {
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Self { filename: Some(filename),
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..Default::default() }
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}
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pub fn with_tag(self, tag:CurrentTag) -> Self {
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Self { tag: Some(tag),
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..Default::default() }
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}
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pub fn remove_tag(self) -> Self {
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Self { tag: None,
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..Default::default() }
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}
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}
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fn main() {
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let args:Vec<_> = env::args().collect();
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if args.len() != 2 {
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println!("Required: filename.");
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std::process::exit(2);
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}
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let filename = &args[1];
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println!("Will process {}", filename);
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// Need to find a way to load small chunks and feed it to the parser while parsing.
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// (E.g., load 1024 bytes, feed it to the parser and, if the parser can't continue,
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// feed more data, till the end of file).
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let mut file = File::open(filename).unwrap();
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let mut contents = String::new();
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file.read_to_string(&mut contents).unwrap();
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let mut parser = Parser::new();
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parser.feed_str(&contents);
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parser.fold(State::new(), {|state:State, element| {
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match element.unwrap() {
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Event::ElementStart(tag) => {
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match tag.name.as_ref() {
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"title" => state.with_tag(CurrentTag::Title),
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"data" => state.with_tag(CurrentTag::Data),
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"note" => State::new(), // the start of a note resets everything
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_ => state
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}
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},
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Event::ElementEnd(_) => {
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// whatever tag we were following, it is not there anymore.
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state.remove_tag()
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},
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Event::Characters(data) => {
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match state.tag {
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Some(CurrentTag::Title) => {
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let slug = slugify(data);
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println!("TITLE: {}", slug);
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std::fs::create_dir_all(Path::new(slug.as_str())).unwrap();
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state.with_title(slug)
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},
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Some(CurrentTag::Data) => {
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let title = state.title.unwrap().to_string();
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let _filename = Path::new(&title);
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state
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},
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_ => state
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}
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},
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Event::CDATA(_) => {
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state
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},
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_ => state
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}
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}});
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}
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