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Prepare using a context for export / import

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This will allow cancelling the export if the import fails
before the export finished.

For now the context isn't passed on to the actual export functions,
hence there is not yet any cancellation happening.
This commit is contained in:
Philipp Wolfer 2025-05-22 08:48:37 +02:00
parent 536fae6a46
commit 3b545a0fd6
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GPG key ID: 8FDF744D4919943B
3 changed files with 37 additions and 16 deletions
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35
internal/backends/import.go
View file

@ -18,6 +18,7 @@ Scotty. If not, see <https://www.gnu.org/licenses/>.
package backends
import (
"context"
"sync"
"go.uploadedlobster.com/scotty/internal/models"
@ -25,7 +26,7 @@ import (
type ImportProcessor[T models.ListensResult | models.LovesResult] interface {
ImportBackend() models.ImportBackend
Process(wg *sync.WaitGroup, results chan T, out chan models.ImportResult, progress chan models.TransferProgress)
Process(ctx context.Context, wg *sync.WaitGroup, results chan T, out chan models.ImportResult, progress chan models.TransferProgress)
Import(export T, result models.ImportResult, out chan models.ImportResult, progress chan models.TransferProgress) (models.ImportResult, error)
}
@ -37,8 +38,8 @@ func (p ListensImportProcessor) ImportBackend() models.ImportBackend {
return p.Backend
}
func (p ListensImportProcessor) Process(wg *sync.WaitGroup, results chan models.ListensResult, out chan models.ImportResult, progress chan models.TransferProgress) {
process(wg, p, results, out, progress)
func (p ListensImportProcessor) Process(ctx context.Context, wg *sync.WaitGroup, results chan models.ListensResult, out chan models.ImportResult, progress chan models.TransferProgress) {
process(ctx, wg, p, results, out, progress)
}
func (p ListensImportProcessor) Import(export models.ListensResult, result models.ImportResult, out chan models.ImportResult, progress chan models.TransferProgress) (models.ImportResult, error) {
@ -66,8 +67,8 @@ func (p LovesImportProcessor) ImportBackend() models.ImportBackend {
return p.Backend
}
func (p LovesImportProcessor) Process(wg *sync.WaitGroup, results chan models.LovesResult, out chan models.ImportResult, progress chan models.TransferProgress) {
process(wg, p, results, out, progress)
func (p LovesImportProcessor) Process(ctx context.Context, wg *sync.WaitGroup, results chan models.LovesResult, out chan models.ImportResult, progress chan models.TransferProgress) {
process(ctx, wg, p, results, out, progress)
}
func (p LovesImportProcessor) Import(export models.LovesResult, result models.ImportResult, out chan models.ImportResult, progress chan models.TransferProgress) (models.ImportResult, error) {
@ -87,7 +88,12 @@ func (p LovesImportProcessor) Import(export models.LovesResult, result models.Im
return importResult, nil
}
func process[R models.LovesResult | models.ListensResult, P ImportProcessor[R]](wg *sync.WaitGroup, processor P, results chan R, out chan models.ImportResult, progress chan models.TransferProgress) {
func process[R models.LovesResult | models.ListensResult, P ImportProcessor[R]](
ctx context.Context, wg *sync.WaitGroup,
processor P, results chan R,
out chan models.ImportResult,
progress chan models.TransferProgress,
) {
wg.Add(1)
defer wg.Done()
defer close(out)
@ -100,14 +106,21 @@ func process[R models.LovesResult | models.ListensResult, P ImportProcessor[R]](
}
for exportResult := range results {
importResult, err := processor.Import(exportResult, result, out, progress)
result.Update(importResult)
if err != nil {
select {
case <-ctx.Done():
processor.ImportBackend().FinishImport()
out <- handleError(result, err, progress)
out <- handleError(result, ctx.Err(), progress)
return
default:
importResult, err := processor.Import(exportResult, result, out, progress)
result.Update(importResult)
if err != nil {
processor.ImportBackend().FinishImport()
out <- handleError(result, err, progress)
return
}
progress <- p.FromImportResult(result, false)
}
progress <- p.FromImportResult(result, false)
}
if err := processor.ImportBackend().FinishImport(); err != nil {