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|
package worker
import (
"bufio"
"bytes"
"context"
"fmt"
"os/exec"
"git.sr.ht/~gabrielgio/midr/db"
work "git.sr.ht/~sircmpwn/dowork"
)
const (
statusNotQueued = "NOTQUEUED"
statusQueued = "QUEUED"
statusStarted = "RUNNING"
commandStart = "START"
commandEnqueue = "ENQUEUE"
commandDequeue = "DEQUEUE"
)
type command struct {
action string
index uint
}
type Worker struct {
jobs map[uint]string
c chan command
}
type Job struct {
Id uint
Status string
}
func NewWorkder() Worker {
return Worker{
c: make(chan command),
jobs: make(map[uint]string),
}
}
func RunYtDlpProcess(entry *db.Entry) (error, []byte, []byte) {
args := []string{entry.Link}
var stdout bytes.Buffer
var stderr bytes.Buffer
output_template := fmt.Sprintf("%s/%%(title)s.%%(ext)s", entry.OutputFolder)
args = append(args, "-o", output_template)
downloaded_txt := fmt.Sprintf("%s/downloaded.txt", entry.OutputFolder)
args = append(args, "--download-archive", downloaded_txt)
if len(entry.DateAfter) > 0 {
args = append(args, "--dateafter", entry.DateAfter)
}
cmd := exec.Command("yt-dlp", args...)
cmd.Stdout = bufio.NewWriter(&stdout)
cmd.Stderr = bufio.NewWriter(&stderr)
err := cmd.Run()
return err, stdout.Bytes(), stderr.Bytes()
}
func (w *Worker) CanEnqueue(index uint) bool {
v, found := w.jobs[index]
return !found || v == statusNotQueued
}
func (w *Worker) RemoveJob(id uint) {
delete(w.jobs, id)
}
func (w *Worker) RunYtDlpWorker(entry *db.Entry) <-chan []byte {
if !w.CanEnqueue(entry.ID) {
return nil
}
log := make(chan []byte)
w.c <- command{action: commandEnqueue, index: entry.ID}
task := work.NewTask(func(ctx context.Context) error {
w.c <- command{action: commandStart, index: entry.ID}
err, stdout, stderr := RunYtDlpProcess(entry)
log <- stdout
log <- stderr
return err
}).After(func(ctx context.Context, task *work.Task) {
w.c <- command{action: commandDequeue, index: entry.ID}
close(log)
})
work.Enqueue(task)
return log
}
func (w *Worker) startReader() {
for {
command := <-w.c
if command.action == commandEnqueue {
w.jobs[command.index] = statusQueued
} else if command.action == commandStart {
w.jobs[command.index] = statusStarted
} else if command.action == commandDequeue {
w.jobs[command.index] = statusNotQueued
} else {
panic(1)
}
}
}
func (w *Worker) StartReader() {
go w.startReader()
}
func (w *Worker) GetJobs() []Job {
jobs := make([]Job, len(w.jobs))
count := 0
for k, v := range w.jobs {
jobs[count] = Job{Id: k, Status: v}
count++
}
return jobs
}
|
