Organize modules

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/utils/time.rs

@@ -0,0 +1,23 @@
+use std::time::Duration;
+use time::OffsetDateTime;
+
+pub const ONE_MINUTE: Duration = Duration::from_secs(60);
+
+pub fn last_minute() -> OffsetDateTime {
+    let now_timestamp = OffsetDateTime::now_utc().unix_timestamp();
+    OffsetDateTime::from_unix_timestamp(now_timestamp - now_timestamp % 60).unwrap()
+}
+
+pub fn next_minute() -> OffsetDateTime {
+    last_minute() + ONE_MINUTE
+}
+
+pub fn duration_until(time: OffsetDateTime) -> Duration {
+    let duration = time - OffsetDateTime::now_utc();
+
+    if duration.is_positive() {
+        duration.unsigned_abs()
+    } else {
+        Duration::default()
+    }
+}