feat: refactor the settings page architecture

pages/time/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "cosmic-settings-time"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+icu_calendar = "1.2.0"
+icu_timezone = "1.2.0"
+timedate-zbus = "0.1.0"
+
+[dependencies.zbus]
+version = "3.12.0"
+default-features = false
+features = ["tokio"]

pages/time/src/lib.rs

@@ -0,0 +1,48 @@
+// Copyright 2023 System76 <info@system76.com>
+// SPDX-License-Identifier: GPL-3.0-only
+
+use std::time::SystemTime;
+
+use icu_calendar::{types::IsoSecond, DateTime, Iso};
+use icu_timezone::CustomTimeZone;
+use timedate_zbus::TimeDateProxy;
+
+pub struct Info {
+    pub can_ntp: bool,
+    pub timezone: CustomTimeZone,
+    pub local_time: DateTime<Iso>,
+}
+
+impl Info {
+    pub async fn load(proxy: &TimeDateProxy<'_>) -> Option<Info> {
+        let can_ntp = proxy.can_ntp().await.unwrap_or_default();
+
+        let Ok(timezone) = proxy.timezone()
+            .await
+            .unwrap_or_default()
+            .parse::<CustomTimeZone>() else {
+                return None;
+            };
+
+        let Ok(duration) = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH) else {
+            return None;
+        };
+
+        let seconds = duration.as_secs();
+
+        let Ok(iso_seconds) = IsoSecond::try_from((seconds % 60) as u8) else {
+            return None;
+        };
+
+        #[allow(clippy::cast_possible_truncation)]
+        let mut local_time = DateTime::from_minutes_since_local_unix_epoch((seconds / 60) as i32);
+
+        local_time.time.second = iso_seconds;
+
+        Some(Info {
+            can_ntp,
+            timezone,
+            local_time,
+        })
+    }
+}