From da992500f806bb87b06559d920ee12b7680955ee Mon Sep 17 00:00:00 2001
From: "Gabriel A. Giovanini" <mail@gabrielgio.me>
Date: Thu, 16 Jun 2022 16:32:31 +0200
Subject: feat: Add worker

Add a simple worker to manage a work queue. Right now, it is bit
brittled and has no test coverage yet, but it works.

Also moved from pico.css to bulma, I like the idea of classes approach
of pico but for me bulma yields a better result.
---
 worker/worker.go | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 worker/worker.go

(limited to 'worker/worker.go')

diff --git a/worker/worker.go b/worker/worker.go
new file mode 100644
index 0000000..5e0c844
--- /dev/null
+++ b/worker/worker.go
@@ -0,0 +1,76 @@
+package worker
+
+import (
+	"context"
+	"time"
+
+	"git.sr.ht/~gabrielgio/midr/db"
+	"git.sr.ht/~gabrielgio/midr/yt"
+	work "git.sr.ht/~sircmpwn/dowork"
+)
+
+const (
+	statusStoped  = "STOPPED"
+	statusStarted = "STARTED"
+
+	commandStart = "START"
+	commandStop  = "STOP"
+)
+
+type command struct {
+	action string
+	index  uint
+}
+
+type Worker struct {
+	jobs map[uint]string
+	c    chan command
+}
+
+func (w *Worker) SpawnWorker(index uint, link string, output string) {
+
+	if v, found := w.jobs[index]; found && v == statusStarted {
+		return
+	}
+
+	w.c <- command{action: commandStart, index: index}
+	task := work.NewTask(func(ctx context.Context) error {
+		yt.RunYtDlpProcess(link, output)
+		return nil
+	}).After(func(ctx context.Context, task *work.Task) {
+		w.c <- command{action: commandStop, index: index}
+	})
+
+	work.Enqueue(task)
+}
+
+func (w *Worker) startReader() {
+	for true {
+		command := <-w.c
+
+		if command.action == commandStop {
+			w.jobs[command.index] = statusStoped
+		} else if command.action == commandStart {
+			w.jobs[command.index] = statusStarted
+		} else {
+			panic(1)
+		}
+	}
+}
+
+func (w *Worker) startScheduler(model db.EntryModel) {
+	for true {
+		entries := model.All()
+		for _, e := range entries {
+			w.SpawnWorker(e.ID, e.Link, e.OutputFolder)
+		}
+		time.Sleep(30 * time.Minute)
+	}
+}
+
+func (w *Worker) StartWorker(model db.EntryModel) {
+	w.c = make(chan command, 10)
+	w.jobs = make(map[uint]string)
+	go w.startReader()
+	go w.startScheduler(model)
+}
-- 
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