fc-common: add build_metrics table and repository

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: If6842311f49bfcba9e1b11fa8bc9748c6a6a6964

crates/common/src/models.rs

@@ -164,6 +164,26 @@ pub struct BuildDependency {
   pub dependency_build_id: Uuid,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize, FromRow)]
+pub struct BuildMetric {
+  pub id:           Uuid,
+  pub build_id:     Uuid,
+  pub metric_name:  String,
+  pub metric_value: f64,
+  pub unit:         String,
+  pub collected_at: DateTime<Utc>,
+}
+
+pub mod metric_names {
+  pub const BUILD_DURATION_SECONDS: &str = "build_duration_seconds";
+  pub const OUTPUT_SIZE_BYTES: &str = "output_size_bytes";
+}
+
+pub mod metric_units {
+  pub const SECONDS: &str = "seconds";
+  pub const BYTES: &str = "bytes";
+}
+
 /// Active jobset view — enabled jobsets joined with project info.
 #[derive(Debug, Clone, Serialize, Deserialize, FromRow)]
 pub struct ActiveJobset {

crates/common/src/repo/build_metrics.rs

@@ -0,0 +1,60 @@
+use sqlx::PgPool;
+use uuid::Uuid;
+
+use crate::{
+  error::{CiError, Result},
+  models::BuildMetric,
+};
+
+pub async fn upsert(
+  pool: &PgPool,
+  build_id: Uuid,
+  metric_name: &str,
+  metric_value: f64,
+  unit: &str,
+) -> Result<BuildMetric> {
+  sqlx::query_as::<_, BuildMetric>(
+    "INSERT INTO build_metrics (build_id, metric_name, metric_value, unit) \
+     VALUES ($1, $2, $3, $4) ON CONFLICT (build_id, metric_name) DO UPDATE \
+     SET metric_value = EXCLUDED.metric_value, collected_at = NOW() RETURNING \
+     *",
+  )
+  .bind(build_id)
+  .bind(metric_name)
+  .bind(metric_value)
+  .bind(unit)
+  .fetch_one(pool)
+  .await
+  .map_err(CiError::Database)
+}
+
+pub async fn calculate_failure_rate(
+  pool: &PgPool,
+  project_id: Option<Uuid>,
+  jobset_id: Option<Uuid>,
+  window_minutes: i64,
+) -> Result<f64> {
+  let rows: Vec<(Uuid, String)> = sqlx::query_as(
+    "SELECT b.id, b.status::text FROM builds b JOIN evaluations e ON \
+     b.evaluation_id = e.id JOIN jobsets j ON e.jobset_id = j.id WHERE \
+     ($1::uuid IS NULL OR j.project_id = $1) AND ($2::uuid IS NULL OR j.id = \
+     $2) AND b.completed_at > NOW() - (INTERVAL '1 minute' * $3) ORDER BY \
+     b.completed_at DESC",
+  )
+  .bind(project_id)
+  .bind(jobset_id)
+  .bind(window_minutes)
+  .fetch_all(pool)
+  .await
+  .map_err(CiError::Database)?;
+
+  if rows.is_empty() {
+    return Ok(0.0);
+  }
+
+  let failed_count = rows
+    .iter()
+    .filter(|(_, status)| *status == "Failed")
+    .count();
+  Ok((failed_count as f64) / (rows.len() as f64) * 100.0)
+}

crates/common/src/repo/mod.rs

@@ -1,5 +1,6 @@
 pub mod api_keys;
 pub mod build_dependencies;
+pub mod build_metrics;
 pub mod build_products;
 pub mod build_steps;
 pub mod builds;