47 lines
943 B
Go
47 lines
943 B
Go
package dispatcher
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import (
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"context"
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"sync"
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"lmika.dev/cmd/dynamo-browse/internal/common/ui/events"
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"lmika.dev/cmd/dynamo-browse/internal/common/ui/uimodels"
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"github.com/pkg/errors"
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)
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type Dispatcher struct {
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mutex *sync.Mutex
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runningOp uimodels.Operation
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publisher MessagePublisher
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}
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func NewDispatcher(publisher MessagePublisher) *Dispatcher {
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return &Dispatcher{
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mutex: new(sync.Mutex),
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publisher: publisher,
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}
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}
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func (d *Dispatcher) Start(ctx context.Context, operation uimodels.Operation) {
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d.mutex.Lock()
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defer d.mutex.Unlock()
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if d.runningOp != nil {
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d.publisher.Send(events.Error(errors.New("operation already running")))
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}
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d.runningOp = operation
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go func() {
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subCtx := uimodels.WithContext(ctx, DispatcherContext{d.publisher})
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err := operation.Execute(subCtx)
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if err != nil {
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d.publisher.Send(events.Error(err))
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}
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d.mutex.Lock()
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defer d.mutex.Unlock()
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d.runningOp = nil
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}()
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}
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