Add resumable downloads, download paths, queue controls and history

internal/jobs/progress.go

@@ -0,0 +1,79 @@
+package jobs
+
+import (
+	"context"
+	"errors"
+
+	"ddc/internal/fetch"
+)
+
+var errPaused = errors.New("download paused")
+
+func (job *Job) SetTotal(total int64) {
+	job.bytesTotal.Store(total)
+}
+
+func (job *Job) SetDone(done int64) {
+	job.bytesDone.Store(done)
+}
+
+func (job *Job) Add(delta int64) {
+	job.bytesDone.Add(delta)
+}
+
+func (job *Job) SetFileName(name string) {
+	job.mutex.Lock()
+	defer job.mutex.Unlock()
+	job.fileName = name
+}
+
+func (job *Job) SetNotice(text string) {
+	job.mutex.Lock()
+	defer job.mutex.Unlock()
+	if !job.deleted && job.status == StatusDownloading {
+		job.message = text
+	}
+}
+
+func (job *Job) resetProgress() {
+	job.bytesDone.Store(0)
+	job.bytesTotal.Store(0)
+}
+
+func (job *Job) startRun() (context.Context, context.CancelCauseFunc) {
+	runContext, cancelRun := context.WithCancelCause(job.jobContext)
+	job.mutex.Lock()
+	defer job.mutex.Unlock()
+	job.cancelRun = cancelRun
+	return runContext, cancelRun
+}
+
+func (job *Job) pause() bool {
+	job.mutex.Lock()
+	defer job.mutex.Unlock()
+	if job.cancelRun == nil || (job.status != StatusQueued && job.status != StatusDownloading) {
+		return false
+	}
+	job.cancelRun(errPaused)
+	return true
+}
+
+func (job *Job) currentDownloadState() *fetch.State {
+	job.mutex.Lock()
+	defer job.mutex.Unlock()
+	return job.downloadState
+}
+
+func (job *Job) setDownloadState(state *fetch.State) {
+	job.mutex.Lock()
+	defer job.mutex.Unlock()
+	job.downloadState = state
+}
+
+func (job *Job) markDownloaded(fileName string) {
+	job.mutex.Lock()
+	defer job.mutex.Unlock()
+	job.downloaded = true
+	job.downloadState = nil
+	job.fileName = fileName
+}