A wrong premise about report on a running job

core/src/encode/thumb.rs

@@ -1,9 +1,7 @@
 use crate::{
 	api::{locations::LocationExplorerArgs, CoreEvent, LibraryArgs},
 	invalidate_query,
-	job::{
-		JobError, JobMetadata, JobReportUpdate, JobResult, JobState, StatefulJob, WorkerContext,
-	},
+	job::{JobError, JobReportUpdate, JobResult, JobState, StatefulJob, WorkerContext},
 	library::LibraryContext,
 	prisma::{file_path, location},
 };
@@ -95,7 +93,7 @@ impl StatefulJob for ThumbnailJob {
 		});
 		state.steps = image_files.into_iter().collect();
 
-		Ok(())
+		Ok(None)
 	}
 
 	async fn execute_step(
@@ -128,12 +126,12 @@ impl StatefulJob for ThumbnailJob {
 						"skipping thumbnail generation for {}",
 						step.materialized_path
 					);
-					return Ok(());
+					return Ok(None);
 				}
 			}
 			Err(_) => {
 				error!("Error getting cas_id {:?}", step.materialized_path);
-				return Ok(());
+				return Ok(None);
 			}
 		};
 
@@ -175,14 +173,14 @@ impl StatefulJob for ThumbnailJob {
 			state.step_number + 1,
 		)]);
 
-		Ok(())
+		Ok(None)
 	}
 
 	async fn finalize(
 		&self,
 		_ctx: WorkerContext,
 		state: &mut JobState<Self::Init, Self::Data, Self::Step>,
-	) -> Result<JobMetadata, JobError> {
+	) -> JobResult {
 		let data = state
 			.data
 			.as_ref()

core/src/file/cas/identifier.rs

@@ -1,7 +1,5 @@
 use crate::{
-	job::{
-		JobError, JobMetadata, JobReportUpdate, JobResult, JobState, StatefulJob, WorkerContext,
-	},
+	job::{JobError, JobReportUpdate, JobResult, JobState, StatefulJob, WorkerContext},
 	library::LibraryContext,
 	prisma::{file, file_path, location},
 };
@@ -126,7 +124,7 @@ impl StatefulJob for FileIdentifierJob {
 		});
 
 		state.steps = (0..task_count).map(|_| ()).collect();
-		Ok(())
+		Ok(None)
 	}
 
 	async fn execute_step(
@@ -290,14 +288,14 @@ impl StatefulJob for FileIdentifierJob {
 		]);
 
 		// let _remaining = count_orphan_file_paths(&ctx.core_ctx, location.id.into()).await?;
-		Ok(())
+		Ok(None)
 	}
 
 	async fn finalize(
 		&self,
 		_ctx: WorkerContext,
 		state: &mut JobState<Self::Init, Self::Data, Self::Step>,
-	) -> Result<JobMetadata, JobError> {
+	) -> JobResult {
 		let data = state
 			.data
 			.as_ref()

core/src/job/mod.rs

@@ -42,7 +42,7 @@ pub enum JobError {
 	Paused(Vec<u8>),
 }
 
-pub type JobResult = Result<(), JobError>;
+pub type JobResult = Result<JobMetadata, JobError>;
 pub type JobMetadata = Option<Vec<u8>>;
 
 #[async_trait::async_trait]
@@ -68,7 +68,7 @@ pub trait StatefulJob: Send + Sync {
 		&self,
 		ctx: WorkerContext,
 		state: &mut JobState<Self::Init, Self::Data, Self::Step>,
-	) -> Result<JobMetadata, JobError>;
+	) -> JobResult;
 }
 
 #[async_trait::async_trait]
@@ -184,12 +184,8 @@ where
 			self.state.step_number += 1;
 		}
 
-		// It is ok to unwrap here, a running job will always have a report.
-		self.report.as_mut().unwrap().metadata = self
-			.stateful_job
+		self.stateful_job
 			.finalize(ctx.clone(), &mut self.state)
-			.await?;
-
-		Ok(())
+			.await
 	}
 }

core/src/job/worker.rs

@@ -1,4 +1,4 @@
-use crate::job::{DynJob, JobError, JobManager, JobReportUpdate, JobStatus};
+use crate::job::{DynJob, JobError, JobManager, JobMetadata, JobReportUpdate, JobStatus};
 use crate::library::LibraryContext;
 use crate::{api::LibraryArgs, invalidate_query};
 use std::{sync::Arc, time::Duration};
@@ -22,7 +22,7 @@ pub enum WorkerEvent {
 		updates: Vec<JobReportUpdate>,
 		debounce: bool,
 	},
-	Completed(oneshot::Sender<()>),
+	Completed(oneshot::Sender<()>, JobMetadata),
 	Failed(oneshot::Sender<()>),
 	Paused(Vec<u8>, oneshot::Sender<()>),
 }
@@ -151,25 +151,27 @@ impl Worker {
 
 			let (done_tx, done_rx) = oneshot::channel();
 
-			if let Err(e) = job.run(worker_ctx.clone()).await {
-				if let JobError::Paused(state) = e {
+			match job.run(worker_ctx.clone()).await {
+				Ok(metadata) => {
+					// handle completion
+					worker_ctx
+						.events_tx
+						.send(WorkerEvent::Completed(done_tx, metadata))
+						.expect("critical error: failed to send worker complete event");
+				}
+				Err(JobError::Paused(state)) => {
 					worker_ctx
 						.events_tx
 						.send(WorkerEvent::Paused(state, done_tx))
 						.expect("critical error: failed to send worker pause event");
-				} else {
+				}
+				Err(e) => {
 					error!("job '{}' failed with error: {:#?}", job_id, e);
 					worker_ctx
 						.events_tx
 						.send(WorkerEvent::Failed(done_tx))
 						.expect("critical error: failed to send worker fail event");
 				}
-			} else {
-				// handle completion
-				worker_ctx
-					.events_tx
-					.send(WorkerEvent::Completed(done_tx))
-					.expect("critical error: failed to send worker complete event");
 			}
 
 			if let Err(e) = done_rx.await {
@@ -228,9 +230,10 @@ impl Worker {
 						LibraryArgs::new(library.id, ())
 					);
 				}
-				WorkerEvent::Completed(done_tx) => {
+				WorkerEvent::Completed(done_tx, metadata) => {
 					worker.report.status = JobStatus::Completed;
 					worker.report.data = None;
+					worker.report.metadata = metadata;
 					if let Err(e) = worker.report.update(&library).await {
 						error!("failed to update job report: {:#?}", e);
 					}

core/src/location/indexer/indexer_job.rs

@@ -1,7 +1,5 @@
 use crate::{
-	job::{
-		JobError, JobMetadata, JobReportUpdate, JobResult, JobState, StatefulJob, WorkerContext,
-	},
+	job::{JobReportUpdate, JobResult, JobState, StatefulJob, WorkerContext},
 	prisma::{file_path, location},
 };
 
@@ -221,7 +219,7 @@ impl StatefulJob for IndexerJob {
 			})
 			.collect();
 
-		Ok(())
+		Ok(None)
 	}
 
 	/// Process each chunk of entries in the indexer job, writing to the `file_path` table
@@ -284,7 +282,7 @@ impl StatefulJob for IndexerJob {
 
 		info!("Inserted {count} records");
 
-		Ok(())
+		Ok(None)
 	}
 
 	/// Logs some metadata about the indexer job
@@ -292,7 +290,7 @@ impl StatefulJob for IndexerJob {
 		&self,
 		_ctx: WorkerContext,
 		state: &mut JobState<Self::Init, Self::Data, Self::Step>,
-	) -> Result<JobMetadata, JobError> {
+	) -> JobResult {
 		let data = state
 			.data
 			.as_ref()