feat(rust): add shared Signal client and workspace configuration

rust/van_weather/src/main.rs

@@ -4,6 +4,7 @@ use anyhow::{Context, Result, bail};
 use chrono::{DateTime, Utc};
 use clap::Parser;
 use log::{error, info};
+use num_traits::ToPrimitive;
 use reqwest::{
     StatusCode, Url,
     blocking::{Client, ClientBuilder},
@@ -25,7 +26,7 @@ const fn decimal_factor(decimals: u32) -> f64 {
     let mut remaining = decimals;
     while remaining > 0 {
         factor *= 10.0;
-        remaining -= 1;
+        remaining = remaining.saturating_sub(1);
     }
     factor
 }
@@ -468,18 +469,25 @@ fn weather_updates(weather: &Weather) -> Vec<(String, Value)> {
 }
 
 fn sensor(entity_id: &str, state: Option<Value>, attributes: Value) -> Option<(String, Value)> {
-    state.map(|state| {
-        let mut payload = serde_json::Map::new();
-        payload.insert("state".to_owned(), state);
-        payload.insert("attributes".to_owned(), attributes);
-        (entity_id.to_owned(), Value::Object(payload))
-    })
+    let state = state?;
+    let mut payload = serde_json::Map::new();
+    payload.insert("state".to_owned(), state);
+    payload.insert("attributes".to_owned(), attributes);
+    Some((entity_id.to_owned(), Value::Object(payload)))
 }
 
-#[allow(clippy::cast_possible_truncation)]
 fn percent(value: Option<f64>) -> i64 {
     // Preserve Python's int(probability * 100) behavior for Home Assistant.
-    (value.unwrap_or_default() * 100.0) as i64
+    let value = value.unwrap_or_default() * 100.0;
+    value.to_i64().unwrap_or_else(|| {
+        if value.is_nan() {
+            0
+        } else if value.is_sign_negative() {
+            i64::MIN
+        } else {
+            i64::MAX
+        }
+    })
 }
 
 #[cfg(test)]
@@ -562,4 +570,21 @@ mod tests {
         assert!((mask_coordinate(37.7749) - 37.8).abs() < f64::EPSILON);
         assert!((mask_coordinate(-122.4194) - (-122.4)).abs() < f64::EPSILON);
     }
+
+    #[test]
+    fn percentages_truncate_and_preserve_saturation_for_extreme_values() {
+        for (value, expected) in [
+            (None, 0),
+            (Some(0.129), 12),
+            (Some(-0.129), -12),
+            (Some(1.0), 100),
+            (Some(f64::NAN), 0),
+            (Some(f64::MAX), i64::MAX),
+            (Some(f64::MIN), i64::MIN),
+            (Some(f64::INFINITY), i64::MAX),
+            (Some(f64::NEG_INFINITY), i64::MIN),
+        ] {
+            assert_eq!(percent(value), expected);
+        }
+    }
 }