Add CLI bin

Cargo.toml

@@ -12,4 +12,5 @@ chrono = { version = "0.4", features = ["serde"] }
 leptos = { version = "0.7", features = ["csr"] }
 console_error_panic_hook = "0.1.7"
 serde = { version = "1.0", features = ["derive"] }
-serde_json = "1.0"
+serde_json = "1.0"
+clap = { version = "4.5", features = ["derive"] }

src/bin/cli.rs

@@ -0,0 +1,21 @@
+use clap::Parser;
+use jana_sessions_webpage::localize_day;
+use jana_sessions_webpage::session_date_calculator::{DayIter, NthWeekday};
+use std::io::stdin;
+
+#[derive(Debug, Parser)]
+struct Args {
+  sessions: Vec<NthWeekday>
+}
+
+fn main() {
+  let args = Args::parse();
+
+  let mut iter = DayIter::default().filter(|day| args.sessions.iter().any(|nth_weekday| nth_weekday.matches(day)));
+
+  loop {
+    iter.by_ref().take(3).for_each(|day| println!("{}", localize_day(&day)));
+    println!("Press enter for more...");
+    stdin().read_line(&mut String::new()).unwrap();
+  }
+}

src/lib.rs

@@ -1,2 +1,21 @@
+use crate::session_date_calculator::Day;
+use chrono::Weekday;
+
 pub mod session_date_calculator;
 pub mod webpage;
+
+pub fn localize_day(day: &Day) -> String {
+  format!(
+    "{}, {}",
+    match day.weekday {
+      Weekday::Mon => "Montag",
+      Weekday::Tue => "Dienstag",
+      Weekday::Wed => "Mittwoch",
+      Weekday::Thu => "Donnerstag",
+      Weekday::Fri => "Freitag",
+      Weekday::Sat => "Samstag",
+      Weekday::Sun => "Sonntag",
+    },
+    day.date.format("%d.%m.%Y")
+  )
+}

src/main.rs

@@ -1,5 +1,3 @@
-use chrono::Weekday;
-use jana_sessions_webpage::session_date_calculator::Day;
 use jana_sessions_webpage::webpage;
 use leptos::prelude::*;
 
@@ -9,18 +7,3 @@ fn main() {
   mount_to_body(webpage::App);
 }
 
-pub fn localize_day(day: &Day) -> String {
-  format!(
-    "{}, {}",
-    match day.weekday {
-      Weekday::Mon => "Montag",
-      Weekday::Tue => "Dienstag",
-      Weekday::Wed => "Mittwoch",
-      Weekday::Thu => "Donnerstag",
-      Weekday::Fri => "Freitag",
-      Weekday::Sat => "Samstag",
-      Weekday::Sun => "Sonntag",
-    },
-    day.date.format("%d.%m.%Y")
-  )
-}