Say when the next card will be available

2 files changed, 34 insertions, 0 deletions

diff --git a/src/util/mod.rs b/src/util/mod.rs
index c5504af..c866e61 100644
--- a/src/util/mod.rs
+++ b/src/util/mod.rs
@@ -1,3 +1,4 @@
 #[allow(dead_code)]
 pub mod event;
 pub mod serialization;
+pub mod time;
diff --git a/src/util/time.rs b/src/util/time.rs
new file mode 100644
index 0000000..f88955d
--- /dev/null
+++ b/src/util/time.rs
@@ -0,0 +1,33 @@
+use anyhow::Result;
+use std::time::SystemTime;
+
+pub fn now() -> Result<u64> {
+    Ok(SystemTime::now()
+        .duration_since(SystemTime::UNIX_EPOCH)?
+        .as_secs())
+}
+
+/// Pretty print duration.
+pub fn pp_duration(seconds: u64) -> String {
+    let minutes = (seconds as f64 / 60.).round();
+    let hours = (minutes / 60.).round();
+    let days = (hours / 24.).round();
+
+    if seconds < 60 {
+        plural(seconds, "seconde")
+    } else if minutes < 60. {
+        plural(minutes as u64, "minute")
+    } else if hours < 24. {
+        plural(hours as u64, "heure")
+    } else {
+        plural(days as u64, "jour")
+    }
+}
+
+fn plural(n: u64, str: &str) -> String {
+    if n <= 1 {
+        format!("{} {}", n, str)
+    } else {
+        format!("{} {}s", n, str)
+    }
+}