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Add support for hashtags in md parser

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This commit is contained in:
Trinity Pointard 2018-10-20 16:38:16 +02:00
parent a6e73f4667
commit 4fa3a0f6ee
5 changed files with 119 additions and 40 deletions
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147
plume-common/src/utils.rs
View File

@ -20,58 +20,117 @@ pub fn requires_login(message: &str, url: Uri) -> Flash<Redirect> {
Flash::new(Redirect::to(format!("/login?m={}", gettext(message.to_string()))), "callback", url.to_string())
}
/// Returns (HTML, mentions)
pub fn md_to_html(md: &str) -> (String, Vec<String>) {
#[derive(Debug)]
enum State {
Mention,
Hashtag,
Word,
Ready,
}
/// Returns (HTML, mentions, hashtags)
pub fn md_to_html(md: &str) -> (String, Vec<String>, Vec<String>) {
let parser = Parser::new_ext(md, Options::all());
let (parser, mentions): (Vec<Vec<Event>>, Vec<Vec<String>>) = parser.map(|evt| match evt {
let (parser, mentions, hashtags): (Vec<Vec<Event>>, Vec<Vec<String>>, Vec<Vec<String>>) = parser.map(|evt| match evt {
Event::Text(txt) => {
let (evts, _, _, _, new_mentions) = txt.chars().fold((vec![], false, String::new(), 0, vec![]), |(mut events, in_mention, text_acc, n, mut mentions), c| {
if in_mention {
let char_matches = c.is_alphanumeric() || c == '@' || c == '.' || c == '-' || c == '_';
if char_matches && (n < (txt.chars().count() - 1)) {
(events, in_mention, text_acc + c.to_string().as_ref(), n + 1, mentions)
} else {
let mention = if char_matches {
text_acc + c.to_string().as_ref()
let (evts, _, _, _, new_mentions, new_hashtags) = txt.chars().fold((vec![], State::Ready, String::new(), 0, vec![], vec![]), |(mut events, state, text_acc, n, mut mentions, mut hashtags), c| {
match state {
State::Mention => {
let char_matches = c.is_alphanumeric() || c == '@' || c == '.' || c == '-' || c == '_';
if char_matches && (n < (txt.chars().count() - 1)) {
(events, State::Mention, text_acc + c.to_string().as_ref(), n + 1, mentions, hashtags)
} else {
text_acc
};
let short_mention = mention.clone();
let short_mention = short_mention.splitn(1, '@').nth(0).unwrap_or("");
let link = Tag::Link(format!("/@/{}/", mention).into(), short_mention.to_string().into());
let mention = if char_matches {
text_acc + c.to_string().as_ref()
} else {
text_acc
};
let short_mention = mention.clone();
let short_mention = short_mention.splitn(1, '@').nth(0).unwrap_or("");
let link = Tag::Link(format!("/@/{}/", mention).into(), short_mention.to_string().into());
mentions.push(mention);
events.push(Event::Start(link.clone()));
events.push(Event::Text(format!("@{}", short_mention).into()));
events.push(Event::End(link));
mentions.push(mention);
events.push(Event::Start(link.clone()));
events.push(Event::Text(format!("@{}", short_mention).into()));
events.push(Event::End(link));
(events, false, c.to_string(), n + 1, mentions)
}
} else {
if c == '@' {
events.push(Event::Text(text_acc.into()));
(events, true, String::new(), n + 1, mentions)
} else {
if n >= (txt.chars().count() - 1) { // Add the text after at the end, even if it is not followed by a mention.
events.push(Event::Text((text_acc.clone() + c.to_string().as_ref()).into()))
(events, State::Ready, c.to_string(), n + 1, mentions, hashtags)
}
}
State::Hashtag => {
let char_matches = c.is_alphanumeric();
if char_matches && (n < (txt.chars().count() -1)) {
(events, State::Hashtag, text_acc + c.to_string().as_ref(), n+1, mentions, hashtags)
} else {
let hashtag = if char_matches {
text_acc + c.to_string().as_ref()
} else {
text_acc
};
let link = Tag::Link(format!("/tag/{}", hashtag).into(), hashtag.to_string().into());
hashtags.push(hashtag.clone());
events.push(Event::Start(link.clone()));
events.push(Event::Text(format!("#{}", hashtag).into()));
events.push(Event::End(link));
(events, State::Ready, c.to_string(), n + 1, mentions, hashtags)
}
}
State::Ready => {
if c == '@' {
events.push(Event::Text(text_acc.into()));
(events, State::Mention, String::new(), n + 1, mentions, hashtags)
} else if c == '#' {
events.push(Event::Text(text_acc.into()));
(events, State::Hashtag, String::new(), n + 1, mentions, hashtags)
} else if c.is_alphanumeric() {
if n >= (txt.chars().count() - 1) { // Add the text after at the end, even if it is not followed by a mention.
events.push(Event::Text((text_acc.clone() + c.to_string().as_ref()).into()))
}
(events, State::Word, text_acc + c.to_string().as_ref(), n + 1, mentions, hashtags)
} else {
if n >= (txt.chars().count() - 1) { // Add the text after at the end, even if it is not followed by a mention.
events.push(Event::Text((text_acc.clone() + c.to_string().as_ref()).into()))
}
(events, State::Ready, text_acc + c.to_string().as_ref(), n + 1, mentions, hashtags)
}
}
State::Word => {
if c.is_alphanumeric() {
if n >= (txt.chars().count() - 1) { // Add the text after at the end, even if it is not followed by a mention.
events.push(Event::Text((text_acc.clone() + c.to_string().as_ref()).into()))
}
(events, State::Word, text_acc + c.to_string().as_ref(), n + 1, mentions, hashtags)
} else {
if n >= (txt.chars().count() - 1) { // Add the text after at the end, even if it is not followed by a mention.
events.push(Event::Text((text_acc.clone() + c.to_string().as_ref()).into()))
}
(events, State::Ready, text_acc + c.to_string().as_ref(), n + 1, mentions, hashtags)
}
(events, in_mention, text_acc + c.to_string().as_ref(), n + 1, mentions)
}
}
});
(evts, new_mentions)
(evts, new_mentions, new_hashtags)
},
_ => (vec![evt], vec![])
}).unzip();
_ => (vec![evt], vec![], vec![])
}).fold((vec![],vec![],vec![]), |(mut parser, mut mention, mut hashtag), (p, m, h)| {
parser.push(p);
mention.push(m);
hashtag.push(h);
(parser, mention, hashtag)
});
let parser = parser.into_iter().flatten();
let mentions = mentions.into_iter().flatten().map(|m| String::from(m.trim()));
let hashtags = hashtags.into_iter().flatten().map(|h| String::from(h.trim()));
// TODO: fetch mentionned profiles in background, if needed
let mut buf = String::new();
html::push_html(&mut buf, parser);
(buf, mentions.collect())
let hashtags = hashtags.collect();
(buf, mentions.collect(), hashtags)
}
#[cfg(test)]
@ -90,10 +149,30 @@ mod tests {
("between parenthesis (@test)", vec!["test"]),
("with some punctuation @test!", vec!["test"]),
(" @spaces ", vec!["spaces"]),
("not_a@mention", vec![]),
];
for (md, mentions) in tests {
assert_eq!(md_to_html(md).1, mentions.into_iter().map(|s| s.to_string()).collect::<Vec<String>>());
}
}
#[test]
fn test_hashtags() {
let tests = vec![
("nothing", vec![]),
("#hashtag", vec!["hashtag"]),
("#many #hashtags", vec!["many", "hashtags"]),
("#start with a hashtag", vec!["start"]),
("hashtag at #end", vec!["end"]),
("between parenthesis (#test)", vec!["test"]),
("with some punctuation #test!", vec!["test"]),
(" #spaces ", vec!["spaces"]),
("not_a#hashtag", vec![]),
];
for (md, mentions) in tests {
assert_eq!(md_to_html(md).2, mentions.into_iter().map(|s| s.to_string()).collect::<Vec<String>>());
}
}
}

2
plume-models/src/comments.rs
View File

@ -100,7 +100,7 @@ impl Comment {
}
pub fn into_activity(&self, conn: &Connection) -> Note {
let (html, mentions) = utils::md_to_html(self.content.get().as_ref());
let (html, mentions, _hashtags) = utils::md_to_html(self.content.get().as_ref());
let author = User::get(conn, self.author_id).expect("Comment::into_activity: author error");
let mut note = Note::default();

4
plume-models/src/instance.rs
View File

@ -117,8 +117,8 @@ impl Instance {
}
pub fn update(&self, conn: &Connection, name: String, open_registrations: bool, short_description: SafeString, long_description: SafeString) {
let (sd, _) = md_to_html(short_description.as_ref());
let (ld, _) = md_to_html(long_description.as_ref());
let (sd, _, _) = md_to_html(short_description.as_ref());
let (ld, _, _) = md_to_html(long_description.as_ref());
diesel::update(self)
.set((
instances::name.eq(name),

2
src/routes/comments.rs
View File

@ -35,7 +35,7 @@ fn create(blog_name: String, slug: String, data: LenientForm<NewCommentForm>, us
let form = data.get();
form.validate()
.map(|_| {
let (html, mentions) = utils::md_to_html(form.content.as_ref());
let (html, mentions, _hashtags) = utils::md_to_html(form.content.as_ref());
let comm = Comment::insert(&*conn, NewComment {
content: SafeString::new(html.as_ref()),
in_response_to_id: form.responding_to.clone(),

4
src/routes/posts.rs
View File

@ -183,7 +183,7 @@ fn update(blog: String, slug: String, user: User, conn: DbConn, data: LenientFor
// actually it's not "Ok"…
Ok(Redirect::to(uri!(super::blogs::details: name = blog)))
} else {
let (content, mentions) = utils::md_to_html(form.content.to_string().as_ref());
let (content, mentions, _hashtag) = utils::md_to_html(form.content.to_string().as_ref());//TODO do something with hashtags
let license = if form.license.len() > 0 {
form.license.to_string()
@ -294,7 +294,7 @@ fn create(blog_name: String, data: LenientForm<NewPostForm>, user: User, conn: D
// actually it's not "Ok"…
Ok(Redirect::to(uri!(super::blogs::details: name = blog_name)))
} else {
let (content, mentions) = utils::md_to_html(form.content.to_string().as_ref());
let (content, mentions, _hashtag) = utils::md_to_html(form.content.to_string().as_ref());//TODO do something with hashtags
let post = Post::insert(&*conn, NewPost {
blog_id: blog.id,