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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| #[inline] | ||
| fn floor_char_boundary(s: &str, index: usize) -> usize { | ||
| if index >= s.len() { | ||
| s.len() | ||
| } else { | ||
| let lower_bound = index.saturating_sub(3); | ||
| let new_index = s.as_bytes()[lower_bound..=index] | ||
| .iter() | ||
| .rposition(|b| is_utf8_char_boundary(*b)); | ||
|
|
||
| // SAFETY: we know that the character boundary will be within four bytes | ||
| unsafe { lower_bound + new_index.unwrap_unchecked() } | ||
| } | ||
| } | ||
|
|
||
| #[inline] | ||
| fn is_utf8_char_boundary(c: u8) -> bool { | ||
| // This is bit magic equivalent to: b < 128 || b >= 192 | ||
| (c as i8) >= -0x40 | ||
| } | ||
|
|
||
| const ABBREV_SIZE: usize = 10; | ||
|
|
||
| pub fn abbrev_str(name: &str) -> String { | ||
| if name.len() > ABBREV_SIZE { | ||
| let closest = floor_char_boundary(name, ABBREV_SIZE); | ||
| format!("{}...", &name[..closest]) | ||
| } else { | ||
| name.to_owned() | ||
| } | ||
| } | ||
|
|
||
| pub fn abbreviate<'a>(text: &'a str, len: usize) -> &'a str { | ||
| let closest = floor_char_boundary(text, len); | ||
| &text[..closest] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| use crate::Error; | ||
| use crate::{ | ||
| abbrev::{abbrev_str, abbreviate}, | ||
| render, Notecrumbs, | ||
| }; | ||
| use html_escape; | ||
| use http_body_util::Full; | ||
| use hyper::{ | ||
| body::Bytes, header, server::conn::http1, service::service_fn, Request, Response, StatusCode, | ||
| }; | ||
| use hyper_util::rt::TokioIo; | ||
| use log::error; | ||
| use nostr_sdk::prelude::{Nip19, ToBech32}; | ||
| use nostrdb::{BlockType, Blocks, Mention, Ndb, Note, Transaction}; | ||
| use std::io::Write; | ||
|
|
||
| pub fn render_note_content(body: &mut Vec<u8>, ndb: &Ndb, note: &Note, blocks: &Blocks) { | ||
| for block in blocks.iter(note) { | ||
| let blocktype = block.blocktype(); | ||
|
|
||
| match block.blocktype() { | ||
| BlockType::Url => { | ||
| let url = html_escape::encode_text(block.as_str()); | ||
| write!(body, r#"<a href="{}">{}</a>"#, url, url); | ||
| } | ||
|
|
||
| BlockType::Hashtag => { | ||
| let hashtag = html_escape::encode_text(block.as_str()); | ||
| write!(body, r#"<span class="hashtag">#{}</span>"#, hashtag); | ||
| } | ||
|
|
||
| BlockType::Text => { | ||
| let text = html_escape::encode_text(block.as_str()); | ||
| write!(body, r"{}", text); | ||
| } | ||
|
|
||
| BlockType::Invoice => { | ||
| write!(body, r"{}", block.as_str()); | ||
| } | ||
|
|
||
| BlockType::MentionIndex => { | ||
| write!(body, r"@nostrich"); | ||
| } | ||
|
|
||
| BlockType::MentionBech32 => { | ||
| let pk = match block.as_mention().unwrap() { | ||
| Mention::Event(_) | ||
| | Mention::Note(_) | ||
| | Mention::Profile(_) | ||
| | Mention::Pubkey(_) | ||
| | Mention::Secret(_) | ||
| | Mention::Addr(_) => { | ||
| write!( | ||
| body, | ||
| r#"<a href="/{}">@{}</a>"#, | ||
| block.as_str(), | ||
| &abbrev_str(block.as_str()) | ||
| ); | ||
| } | ||
|
|
||
| Mention::Relay(relay) => { | ||
| write!( | ||
| body, | ||
| r#"<a href="/{}">{}</a>"#, | ||
| block.as_str(), | ||
| &abbrev_str(relay.as_str()) | ||
| ); | ||
| } | ||
| }; | ||
| } | ||
| }; | ||
| } | ||
| } | ||
|
|
||
| pub fn serve_note_html( | ||
| app: &Notecrumbs, | ||
| nip19: &Nip19, | ||
| note_data: &render::NoteRenderData, | ||
| r: Request<hyper::body::Incoming>, | ||
| ) -> Result<Response<Full<Bytes>>, Error> { | ||
| let mut data = Vec::new(); | ||
|
|
||
| // indices | ||
| // | ||
| // 0: name | ||
| // 1: abbreviated description | ||
| // 2: hostname | ||
| // 3: bech32 entity | ||
| // 4: Full content | ||
|
|
||
| let hostname = "https://damus.io"; | ||
| let abbrev_content = html_escape::encode_text(abbreviate(¬e_data.note.content, 64)); | ||
| let profile_name = html_escape::encode_text(¬e_data.profile.name); | ||
|
|
||
| write!( | ||
| data, | ||
| r#" | ||
| <html> | ||
| <head> | ||
| <title>{0} on nostr</title> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1"> | ||
| <meta charset="UTF-8"> | ||
| <meta property="og:description" content="{1}" /> | ||
| <meta property="og:image" content="{2}/{3}.png"/> | ||
| <meta property="og:image:alt" content="{0}: {1}" /> | ||
| <meta property="og:image:height" content="600" /> | ||
| <meta property="og:image:width" content="1200" /> | ||
| <meta property="og:image:type" content="image/png" /> | ||
| <meta property="og:site_name" content="Damus" /> | ||
| <meta property="og:title" content="{0} on nostr" /> | ||
| <meta property="og:url" content="{2}/{3}"/> | ||
| <meta name="og:type" content="website"/> | ||
| <meta name="twitter:image:src" content="{2}/{3}.png" /> | ||
| <meta name="twitter:site" content="@damusapp" /> | ||
| <meta name="twitter:card" content="summary_large_image" /> | ||
| <meta name="twitter:title" content="{0} on nostr" /> | ||
| <meta name="twitter:description" content="{1}" /> | ||
| </head> | ||
| <body> | ||
| <h3>Note!</h3> | ||
| <div class="note"> | ||
| <div class="note-content">"#, | ||
| profile_name, | ||
| abbrev_content, | ||
| hostname, | ||
| nip19.to_bech32().unwrap() | ||
| )?; | ||
|
|
||
| let ok = (|| -> Result<(), nostrdb::Error> { | ||
| let txn = Transaction::new(&app.ndb)?; | ||
| let note_id = note_data.note.id.ok_or(nostrdb::Error::NotFound)?; | ||
| let note = app.ndb.get_note_by_id(&txn, ¬e_id)?; | ||
| let blocks = app.ndb.get_blocks_by_key(&txn, note.key().unwrap())?; | ||
|
|
||
| render_note_content(&mut data, &app.ndb, ¬e, &blocks); | ||
|
|
||
| Ok(()) | ||
| })(); | ||
|
|
||
| if let Err(err) = ok { | ||
| error!("error rendering html: {}", err); | ||
| write!( | ||
| data, | ||
| "{}", | ||
| html_escape::encode_text(¬e_data.note.content) | ||
| ); | ||
| } | ||
|
|
||
| write!( | ||
| data, | ||
| " | ||
| </div> | ||
| </div> | ||
| </body> | ||
| </html> | ||
| " | ||
| ); | ||
|
|
||
| Ok(Response::builder() | ||
| .header(header::CONTENT_TYPE, "text/html") | ||
| .status(StatusCode::OK) | ||
| .body(Full::new(Bytes::from(data)))?) | ||
| } |
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