convert emojis

Cargo.lock

@@ -242,6 +242,15 @@ version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "11157ac094ffbdde99aa67b23417ebdd801842852b500e395a45a9c0aac03e4a"
 
+[[package]]
+name = "emojis"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ee61eb945bff65ee7d19d157d39c67c33290ff0742907413fd5eefd29edc979"
+dependencies = [
+ "phf",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.1"
@@ -861,6 +870,7 @@ version = "0.1.0"
 dependencies = [
  "aho-corasick",
  "chrono",
+ "emojis",
  "glob",
  "grass",
  "gray_matter",

Cargo.toml

@@ -6,6 +6,7 @@ edition = "2021"
 [dependencies]
 aho-corasick = "1.1.3"
 chrono = "0.4.35"
+emojis = "0.6.1"
 glob = "0.3.1"
 grass = { version = "0.13.2", default-features = false, features = ["random"] }
 gray_matter = { version = "0.2.6", default-features = false, features = ["yaml"] }

src/text/md.rs

@@ -35,6 +35,7 @@ static KATEX_B: Lazy<katex::Opts> = Lazy::new(||
 pub fn parse(text: &str) -> String {
     let stream = Parser::new_ext(text, *OPTS)
         .map(make_math)
+        .map(make_emoji)
         .collect::<Vec<_>>();
 
     let stream = make_code(stream)
@@ -99,3 +100,32 @@ fn make_ruby(event: Event) -> Vec<Event> {
         _ => vec![event],
     }
 }
+
+fn make_emoji(event: Event) -> Event {
+    match event {
+        Event::Text(ref text) => {
+            let mut buf = None;
+            let mut top = 0;
+            let mut old = 0;
+
+            for (idx, _) in text.match_indices(':') {
+                let key = &text[old..idx];
+
+                if let Some(emoji) = emojis::get_by_shortcode(key) {
+                    let buf = buf.get_or_insert_with(|| String::with_capacity(text.len()));
+                    buf.push_str(&text[top..old-1]);
+                    buf.push_str(emoji.as_str());
+                    top = idx;
+                }
+
+                old = idx + 1;
+            }
+
+            match buf {
+                None      => event,
+                Some(buf) => Event::Text(buf.into())
+            }
+        },
+        _ => event,
+    }
+}