store mttr history for given date

src/alerts/alert_structs.rs

@@ -18,7 +18,7 @@
 
 use std::{collections::HashMap, time::Duration};
 
-use chrono::{DateTime, Utc};
+use chrono::{DateTime, NaiveDate, Utc};
 use serde::{Deserialize, Serialize};
 use tokio::sync::{RwLock, mpsc};
 use ulid::Ulid;
@@ -35,7 +35,7 @@ use crate::{
     },
     metastore::metastore_traits::MetastoreObject,
     query::resolve_stream_names,
-    storage::object_storage::{alert_json_path, alert_state_json_path},
+    storage::object_storage::{alert_json_path, alert_state_json_path, mttr_json_path},
 };
 
 /// Helper struct for basic alert fields during migration
@@ -610,6 +610,32 @@ pub struct AggregatedMTTRStats {
     pub per_alert_stats: HashMap<String, MTTRStats>,
 }
 
+/// Daily MTTR statistics for a specific date
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct DailyMTTRStats {
+    /// Date in YYYY-MM-DD format
+    pub date: NaiveDate,
+    /// Aggregated MTTR statistics for this date
+    pub stats: AggregatedMTTRStats,
+}
+
+/// MTTR history containing array of daily MTTR objects
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MTTRHistory {
+    /// Array of daily MTTR statistics
+    pub daily_stats: Vec<DailyMTTRStats>,
+}
+
+/// Query parameters for MTTR API endpoint
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MTTRQueryParams {
+    pub start_date: Option<String>,
+    pub end_date: Option<String>,
+}
+
 impl AggregatedMTTRStats {
     /// Calculate aggregated MTTR stats from multiple alert state entries
     pub fn from_alert_states(alert_states: Vec<AlertStateEntry>) -> Self {
@@ -775,3 +801,13 @@ impl MetastoreObject for AlertConfig {
         alert_json_path(self.id).to_string()
     }
 }
+
+impl MetastoreObject for MTTRHistory {
+    fn get_object_id(&self) -> String {
+        "mttr".to_string()
+    }
+
+    fn get_object_path(&self) -> String {
+        mttr_json_path().to_string()
+    }
+}

src/metastore/metastore_traits.rs

@@ -27,7 +27,10 @@ use tonic::async_trait;
 use ulid::Ulid;
 
 use crate::{
-    alerts::{alert_structs::AlertStateEntry, target::Target},
+    alerts::{
+        alert_structs::{AlertStateEntry, MTTRHistory},
+        target::Target,
+    },
     catalog::manifest::Manifest,
     handlers::http::modal::NodeType,
     metastore::MetastoreError,
@@ -77,6 +80,10 @@ pub trait Metastore: std::fmt::Debug + Send + Sync {
     async fn put_alert_state(&self, obj: &dyn MetastoreObject) -> Result<(), MetastoreError>;
     async fn delete_alert_state(&self, obj: &dyn MetastoreObject) -> Result<(), MetastoreError>;
 
+    /// mttr history
+    async fn get_mttr_history(&self) -> Result<Option<MTTRHistory>, MetastoreError>;
+    async fn put_mttr_history(&self, obj: &dyn MetastoreObject) -> Result<(), MetastoreError>;
+
     /// llmconfig
     async fn get_llmconfigs(&self) -> Result<Vec<Bytes>, MetastoreError>;
     async fn put_llmconfig(&self, obj: &dyn MetastoreObject) -> Result<(), MetastoreError>;

src/metastore/metastores/object_store_metastore.rs

@@ -32,7 +32,10 @@ use tracing::warn;
 use ulid::Ulid;
 
 use crate::{
-    alerts::{alert_structs::AlertStateEntry, target::Target},
+    alerts::{
+        alert_structs::{AlertStateEntry, MTTRHistory},
+        target::Target,
+    },
     catalog::{manifest::Manifest, partition_path},
     handlers::http::{
         modal::{Metadata, NodeMetadata, NodeType},
@@ -110,10 +113,7 @@ impl Metastore for ObjectStoreMetastore {
     /// Delete an overview
     async fn delete_overview(&self, stream: &str) -> Result<(), MetastoreError> {
         let path = RelativePathBuf::from_iter([stream, "overview"]);
-        Ok(self
-            .storage
-            .delete_object(&path)
-            .await?)
+        Ok(self.storage.delete_object(&path).await?)
     }
 
     /// This function fetches all the keystones from the underlying object store
@@ -306,6 +306,28 @@ impl Metastore for ObjectStoreMetastore {
             .await?)
     }
 
+    /// Get MTTR history from storage
+    async fn get_mttr_history(&self) -> Result<Option<MTTRHistory>, MetastoreError> {
+        let path = RelativePathBuf::from_iter([ALERTS_ROOT_DIRECTORY, "mttr.json"]);
+        match self.storage.get_object(&path).await {
+            Ok(bytes) => {
+                if let Ok(history) = serde_json::from_slice::<MTTRHistory>(&bytes) {
+                    Ok(Some(history))
+                } else {
+                    Ok(None)
+                }
+            }
+            Err(ObjectStorageError::NoSuchKey(_)) => Ok(None),
+            Err(e) => Err(MetastoreError::ObjectStorageError(e)),
+        }
+    }
+
+    /// Put MTTR history to storage
+    async fn put_mttr_history(&self, obj: &dyn MetastoreObject) -> Result<(), MetastoreError> {
+        let path = RelativePathBuf::from(obj.get_object_path());
+        Ok(self.storage.put_object(&path, to_bytes(obj)).await?)
+    }
+
     /// This function fetches all the llmconfigs from the underlying object store
     async fn get_llmconfigs(&self) -> Result<Vec<Bytes>, MetastoreError> {
         let base_path = RelativePathBuf::from_iter([SETTINGS_ROOT_DIRECTORY, "llmconfigs"]);

src/storage/object_storage.rs

@@ -1152,7 +1152,7 @@ pub fn target_json_path(target_id: &Ulid) -> RelativePathBuf {
 }
 
 /// Constructs the path for storing alert state JSON files
-/// Format: ".parseable/alerts/alert_state_{alert_id}.json"
+/// Format: ".alerts/alert_state_{alert_id}.json"
 #[inline(always)]
 pub fn alert_state_json_path(alert_id: Ulid) -> RelativePathBuf {
     RelativePathBuf::from_iter([
@@ -1161,6 +1161,13 @@ pub fn alert_state_json_path(alert_id: Ulid) -> RelativePathBuf {
     ])
 }
 
+/// Constructs the path for storing MTTR history JSON file
+/// Format: ".alerts/mttr.json"
+#[inline(always)]
+pub fn mttr_json_path() -> RelativePathBuf {
+    RelativePathBuf::from_iter([ALERTS_ROOT_DIRECTORY, "mttr.json"])
+}
+
 #[inline(always)]
 pub fn manifest_path(prefix: &str) -> RelativePathBuf {
     let hostname = hostname::get()