added atomic writer action for ctr c abort

src/corporate/helpers.rs

@@ -2,6 +2,8 @@
 use super::types::*;
 use chrono::{Local, NaiveDate};
 use std::collections::{HashMap, HashSet};
+use rand::rngs::StdRng;
+use rand::prelude::{Rng, SeedableRng, IndexedRandom};
 
 pub fn event_key(e: &CompanyEvent) -> String {
     format!("{}|{}|{}", e.ticker, e.date, e.time)
@@ -67,4 +69,16 @@ pub fn parse_yahoo_date(s: &str) -> anyhow::Result<NaiveDate> {
     NaiveDate::parse_from_str(s, "%B %d, %Y")
         .or_else(|_| NaiveDate::parse_from_str(s, "%b %d, %Y"))
         .map_err(|_| anyhow::anyhow!("Bad date: {s}"))
+}
+
+/// Send-safe random range
+pub fn random_range(min: u64, max: u64) -> u64 {
+    let mut rng = StdRng::from_rng(&mut rand::rng());
+    rng.gen_range(min..max)
+}
+
+/// Send-safe random choice
+pub fn choose_random<T: Clone>(items: &[T]) -> T {
+    let mut rng = StdRng::from_rng(&mut rand::rng());
+    items.choose(&mut rng).unwrap().clone()
 }