mreow

src/data.rs

@@ -23,3 +23,12 @@ pub struct BatteryMutable {
 pub struct BatteryStatic {
     pub total_capacity: i64,
 }
+
+impl Data {
+    pub fn new(battery_static: BatteryStatic) -> Data {
+        Data {
+            data_chunks: Vec::new(),
+            data_static: battery_static,
+        }
+    }
+}

src/main.rs

@@ -1,14 +1,14 @@
 use std::{
     error::Error,
     fs,
-    io::Read,
+    io::{Read, Write},
     thread::sleep,
     time::{Duration, SystemTime},
 };
 
-use rkyv::api::low::deserialize;
+use rkyv::{Deserialize, api::low::deserialize, rancor};
 
-use crate::data::{Data, DataChunk};
+use crate::data::{ArchivedData, Data, DataChunk};
 
 mod battery;
 mod data;
@@ -16,17 +16,33 @@ mod data;
 fn main() -> Result<(), Box<dyn Error>> {
     let mut battery = battery::Battery::new().unwrap();
     battery.update().unwrap();
-    let battery_file = fs::OpenOptions::new()
+    let battery_file = fs::OpenOptions::new().read(true).open("./battery.data");
-        .read(true)
-        .write(true)
-        .open("./battery.data");
 
     let mut data: Data;
 
-    let mut meow = battery_file?;
+    match battery_file {
+        Ok(mut file) => {
             let mut buf: Vec<u8> = Vec::new();
-    meow.read_to_end(&mut buf)?;
+            file.read_to_end(&mut buf)?;
+            let meow_data = rkyv::access::<ArchivedData, rancor::Error>(&buf[..]).unwrap();
+            data = deserialize::<Data, rancor::Error>(meow_data).unwrap();
+        }
+        Err(err) => {
+            let battery_file = fs::OpenOptions::new()
+                .read(true)
+                .create(true)
+                .open("./battery.data");
+            let new_data = Data::new(battery.as_data().0);
+            let raw_data = rkyv::to_bytes::<rancor::Error>(&new_data).unwrap();
+            battery_file?.write_all(&raw_data)?;
+            data = new_data;
+        }
+    }
 
+    let battery_file = fs::OpenOptions::new()
+        .write(true)
+        .open("./battery.data")
+        .unwrap();
     loop {
         battery.update().unwrap();
         let timestamp: u64 = SystemTime::now()
@@ -39,6 +55,9 @@ fn main() -> Result<(), Box<dyn Error>> {
             battery: batt_data.1,
             timestamp,
         };
+        data.data_chunks.push(new_chunk);
+        let raw_data = rkyv::to_bytes::<rancor::Error>(&data).unwrap();
+        battery_file.try_clone()?.write_all(&raw_data)?;
 
         sleep(Duration::from_secs(3));
     }