Record received consumption from inverter

central_backend/Cargo.lock

@@ -523,6 +523,25 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
+[[package]]
+name = "bincode"
+version = "2.0.0-rc.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f11ea1a0346b94ef188834a65c068a03aec181c94896d481d7a0a40d85b0ce95"
+dependencies = [
+ "bincode_derive",
+ "serde",
+]
+
+[[package]]
+name = "bincode_derive"
+version = "2.0.0-rc.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e30759b3b99a1b802a7a3aa21c85c3ded5c28e1c83170d82d70f08bbf7f3e4c"
+dependencies = [
+ "virtue",
+]
+
 [[package]]
 name = "bitflags"
 version = "2.6.0"
@@ -608,6 +627,7 @@ dependencies = [
  "actix-web",
  "anyhow",
  "asn1",
+ "bincode",
  "chrono",
  "clap",
  "env_logger",
@@ -2697,6 +2717,12 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
+[[package]]
+name = "virtue"
+version = "0.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9dcc60c0624df774c82a0ef104151231d37da4962957d691c011c852b2473314"
+
 [[package]]
 name = "walkdir"
 version = "2.5.0"

central_backend/Cargo.toml

@@ -37,4 +37,5 @@ rust-embed = "8.5.0"
 jsonwebtoken = { version = "9.3.0", features = ["use_pem"] }
 prettytable-rs = "0.10.0"
 chrono = "0.4.38"
-serde_yml = "0.0.12"
+serde_yml = "0.0.12"
+bincode = "=2.0.0-rc.3"

central_backend/src/app_config.rs

@@ -255,6 +255,18 @@ impl AppConfig {
     pub fn relay_runtime_day_file_path(&self, relay_id: DeviceRelayID, day: u64) -> PathBuf {
         self.relay_runtime_stats_dir(relay_id).join(day.to_string())
     }
+
+    /// Get energy consumption history path
+    pub fn energy_consumption_history(&self) -> PathBuf {
+        self.storage_path().join("consumption_history")
+    }
+
+    /// Get energy consumption history file path for a given day
+    pub fn energy_consumption_history_day(&self, number: u64) -> PathBuf {
+        self.storage_path()
+            .join("consumption_history")
+            .join(number.to_string())
+    }
 }
 
 #[cfg(test)]

central_backend/src/energy/consumption_cache.rs

@@ -1,6 +1,5 @@
 use crate::constants;
 use crate::energy::consumption::EnergyConsumption;
-use log::log;
 
 pub struct ConsumptionCache {
     nb_vals: usize,

central_backend/src/energy/consumption_history_file.rs

@@ -0,0 +1,128 @@
+use crate::app_config::AppConfig;
+use crate::energy::consumption::EnergyConsumption;
+use crate::utils::time_utils::day_number;
+
+const TIME_INTERVAL: usize = 10;
+
+#[derive(thiserror::Error, Debug)]
+pub enum ConsumptionHistoryError {
+    #[error("Given time is out of file bounds!")]
+    TimeOutOfFileBound,
+}
+
+/// # ConsumptionHistoryFile
+///
+/// Stores the history of house consumption
+pub struct ConsumptionHistoryFile {
+    day: u64,
+    buff: Vec<EnergyConsumption>,
+}
+
+impl ConsumptionHistoryFile {
+    /// Open consumption history file, if it exists, or create an empty one
+    pub fn open(time: u64) -> anyhow::Result<Self> {
+        let day = day_number(time);
+        let path = AppConfig::get().energy_consumption_history_day(day);
+
+        if path.exists() {
+            Ok(Self {
+                day,
+                buff: bincode::decode_from_slice(
+                    &std::fs::read(path)?,
+                    bincode::config::standard(),
+                )?
+                .0,
+            })
+        } else {
+            log::debug!(
+                "Energy consumption stats for day {day} does not exists yet, creating memory buffer"
+            );
+            Ok(Self::new_memory(day))
+        }
+    }
+
+    /// Create a new in memory consumption history
+    fn new_memory(day: u64) -> Self {
+        Self {
+            day,
+            buff: vec![0; 3600 * 24 / TIME_INTERVAL],
+        }
+    }
+
+    /// Resolve time offset of a given time in buffer
+    fn resolve_offset(&self, time: u64) -> anyhow::Result<usize> {
+        let start_of_day = self.day * 3600 * 24;
+
+        if time < start_of_day || time >= start_of_day + 3600 * 24 {
+            return Err(ConsumptionHistoryError::TimeOutOfFileBound.into());
+        }
+
+        let relative_time = (time - start_of_day) / TIME_INTERVAL as u64;
+
+        Ok(relative_time as usize)
+    }
+
+    /// Check if a time is contained in this history
+    pub fn contains_time(&self, time: u64) -> bool {
+        self.resolve_offset(time).is_ok()
+    }
+
+    /// Set new state of relay
+    pub fn set_consumption(
+        &mut self,
+        time: u64,
+        consumption: EnergyConsumption,
+    ) -> anyhow::Result<()> {
+        let idx = self.resolve_offset(time)?;
+        self.buff[idx] = consumption;
+        Ok(())
+    }
+
+    /// Get the consumption recorded at a given time
+    pub fn get_consumption(&self, time: u64) -> anyhow::Result<EnergyConsumption> {
+        let idx = self.resolve_offset(time)?;
+
+        Ok(self.buff[idx])
+    }
+
+    /// Persist device relay state history
+    pub fn save(&self) -> anyhow::Result<()> {
+        let path = AppConfig::get().energy_consumption_history_day(self.day);
+        std::fs::write(
+            path,
+            bincode::encode_to_vec(&self.buff, bincode::config::standard())?,
+        )?;
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::energy::consumption::EnergyConsumption;
+    use crate::energy::consumption_history_file::{ConsumptionHistoryFile, TIME_INTERVAL};
+
+    #[test]
+    fn test_consumption_history() {
+        let mut history = ConsumptionHistoryFile::new_memory(0);
+
+        for i in 0..50 {
+            assert_eq!(
+                history.get_consumption(i * TIME_INTERVAL as u64).unwrap(),
+                0
+            );
+        }
+
+        for i in 0..50 {
+            history
+                .set_consumption(i * TIME_INTERVAL as u64, i as EnergyConsumption * 2)
+                .unwrap();
+        }
+
+        for i in 0..50 {
+            assert_eq!(
+                history.get_consumption(i * TIME_INTERVAL as u64).unwrap(),
+                i as EnergyConsumption * 2
+            );
+        }
+    }
+}

central_backend/src/energy/energy_actor.rs

@@ -7,6 +7,7 @@ use crate::devices::devices_list::DevicesList;
 use crate::energy::consumption;
 use crate::energy::consumption::EnergyConsumption;
 use crate::energy::consumption_cache::ConsumptionCache;
+use crate::energy::consumption_history_file::ConsumptionHistoryFile;
 use crate::energy::engine::EnergyEngine;
 use crate::utils::time_utils::time_secs;
 use actix::prelude::*;
@@ -42,17 +43,19 @@ impl EnergyActor {
 
     async fn refresh(&mut self) -> anyhow::Result<()> {
         // Refresh energy
-        self.consumption_cache
-            .add_value(
-                consumption::get_curr_consumption()
-                    .await
-                    .unwrap_or_else(|e| {
-                        log::error!(
+        let latest_consumption = consumption::get_curr_consumption()
+            .await
+            .unwrap_or_else(|e| {
+                log::error!(
                     "Failed to fetch latest consumption value, will use fallback value! {e}"
                 );
-                        constants::FALLBACK_PRODUCTION_VALUE
-                    }),
-            );
+                constants::FALLBACK_PRODUCTION_VALUE
+            });
+        self.consumption_cache.add_value(latest_consumption);
+
+        let mut history = ConsumptionHistoryFile::open(time_secs())?;
+        history.set_consumption(time_secs(), latest_consumption)?;
+        history.save()?;
 
         if self.last_engine_refresh + AppConfig::get().refresh_interval > time_secs() {
             return Ok(());

central_backend/src/energy/mod.rs

@@ -1,5 +1,6 @@
 pub mod consumption;
 pub mod consumption_cache;
+pub mod consumption_history_file;
 pub mod energy_actor;
 pub mod engine;
 pub mod relay_state_history;

central_backend/src/energy/relay_state_history.rs

@@ -47,7 +47,7 @@ impl RelayStateHistory {
         Self {
             id,
             day,
-            buff: vec![0; 3600 * 24 / TIME_INTERVAL],
+            buff: vec![0; (3600 * 24 / (TIME_INTERVAL * 8)) + 1],
         }
     }
 

central_backend/src/main.rs

@@ -18,6 +18,7 @@ async fn main() -> std::io::Result<()> {
     create_directory_if_missing(AppConfig::get().pki_path()).unwrap();
     create_directory_if_missing(AppConfig::get().devices_config_path()).unwrap();
     create_directory_if_missing(AppConfig::get().relays_runtime_stats_storage_path()).unwrap();
+    create_directory_if_missing(AppConfig::get().energy_consumption_history()).unwrap();
 
     // Initialize PKI
     pki::initialize_root_ca().expect("Failed to initialize Root CA!");