Merge pull request #20 from perpetualcacophony/januannie

merge januannie command

src/commands.rs

@@ -36,7 +36,8 @@ list! {
     version,
     pub wordle,
     help,
-    eightball
+    eightball,
+    januannie
 }
 
 trait LogCommands {

src/commands/januannie.rs

@@ -0,0 +1,53 @@
+use crate::utils::{poise::ContextExt, Context};
+use chrono::NaiveDate;
+
+#[poise::command(slash_command, prefix_command)]
+pub async fn januannie(ctx: Context<'_>) -> crate::Result<()> {
+    let result: crate::utils::poise::CommandResult = try {
+        let text = text(chrono::Utc::now().date_naive());
+        ctx.reply_ext(text).await?;
+    };
+    result?;
+    Ok(())
+}
+
+const JAN_1_2025: NaiveDate =
+    NaiveDate::from_ymd_opt(2025, 01, 01).expect("2025-01-01 should be a valid date");
+
+fn text(current: NaiveDate) -> String {
+    let days_until = JAN_1_2025.signed_duration_since(current).num_days();
+    let days_text = if days_until == 1 {
+        format!("{days_until} day")
+    } else {
+        format!("{days_until} days")
+    };
+
+    format!("{days_text} until Januannie!")
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn one_day_until() {
+        assert_eq!(
+            super::text(
+                super::JAN_1_2025
+                    .checked_sub_days(chrono::Days::new(1))
+                    .unwrap()
+            ),
+            "1 day until Januannie!"
+        )
+    }
+
+    #[test]
+    fn one_week_until() {
+        assert_eq!(
+            super::text(
+                super::JAN_1_2025
+                    .checked_sub_days(chrono::Days::new(7))
+                    .unwrap(),
+            ),
+            "7 days until Januannie!"
+        )
+    }
+}

src/main.rs

@@ -5,6 +5,7 @@
 #![feature(associated_type_defaults)]
 #![feature(try_blocks)]
 #![feature(min_specialization)]
+#![feature(const_option)]
 
 /// Functionality called from Discord.
 mod discord;