commit 8d983de8ef602c8ed3765629eeb281930df1530e
Author: HeshamTB <hishaminv@gmail.com>
Date:   Sun Aug 20 12:22:32 2023 +0300

    init: working multi download

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..840ee65
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+yt-mdl
diff --git a/downloader.go b/downloader.go
new file mode 100644
index 0000000..a8fd0c6
--- /dev/null
+++ b/downloader.go
@@ -0,0 +1,140 @@
+package main
+
+import (
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/jedib0t/go-pretty/v6/progress"
+)
+
+
+const YT_DLP string = "yt-dlp"
+const YT_DLP_FLAG_GET_TITLE string = "--get-title"
+
+const JOB_STATUS_NEW = 1
+const JOB_STATUS_COMPLETED = 2
+const JOB_STATUS_ERR = 3
+
+type DownloadCtx struct {
+    link string
+    title string
+    progress uint8
+    status uint8
+    tracker *progress.Tracker
+    err *error
+}
+
+
+func Download(links *[]string) {
+    // Start and manage goroutines here
+    // Now get titles only
+    downloadCtxsChan := make(chan *DownloadCtx)
+    getTitleErrChan := make(chan *DownloadCtx)
+    startedGoRoutines := 0
+    pw := progress.NewWriter()
+    pw.SetTrackerLength(10)
+    pw.SetNumTrackersExpected(len(*links))
+    pw.SetStyle(progress.StyleDefault)
+    pw.SetUpdateFrequency(time.Millisecond * 100)
+    pw.Style().Visibility.ETA = false
+	pw.Style().Colors = progress.StyleColorsExample
+    pw.Style().Visibility.Speed = false
+    pw.Style().Visibility.Percentage = false
+    pw.Style().Visibility.Value = false
+    pw.Style().Visibility.TrackerOverall = true
+
+    go pw.Render()
+
+    for _, val := range *links {
+        ctx := createDownloadCtx(val)
+
+        pw.AppendTracker(ctx.tracker)
+
+        go startJob(&ctx, downloadCtxsChan, getTitleErrChan)
+        startedGoRoutines++
+    }
+
+    for startedGoRoutines > 0 {
+        select {
+        case ctx := <- downloadCtxsChan:
+            ctx.tracker.UpdateMessage(ctx.title)
+            startedGoRoutines--
+            
+        case ctx := <- getTitleErrChan:
+            ctx.tracker.MarkAsErrored()
+            startedGoRoutines--
+        }
+    }
+
+ 
+    pw.Stop()
+
+    for pw.IsRenderInProgress() {}
+}
+
+func createDownloadCtx(link string) DownloadCtx {
+    var ctx DownloadCtx
+    ctx.tracker = &progress.Tracker{}
+    ctx.tracker.SetValue(0)
+    ctx.tracker.Message = link
+    ctx.tracker.Units = progress.UnitsDefault
+    ctx.link = link
+    ctx.status = JOB_STATUS_NEW
+    return ctx
+}
+
+func startJob(
+    ctx *DownloadCtx, downloadCtxs chan *DownloadCtx, errs chan *DownloadCtx) {
+    
+    getTitle(ctx)
+
+    if ctx.err != nil {
+        errs <- ctx
+        return
+    }
+    ctx.tracker.UpdateMessage(ctx.title)
+
+    ytdlpDownload(ctx, downloadCtxs, errs)
+
+    if ctx.err != nil {
+        errs <- ctx
+        return
+    }
+
+    downloadCtxs <- ctx
+}
+func getTitle(
+    ctx *DownloadCtx) {
+
+    cmd := exec.Command(YT_DLP, YT_DLP_FLAG_GET_TITLE, ctx.link)
+    stdout, err := cmd.Output()
+    if err != nil {
+        ctx.err = &err
+        ctx.status = JOB_STATUS_ERR
+        return
+    }
+    title := string(stdout)
+    title = strings.TrimSpace(title)
+    ctx.title = title
+
+}
+
+func ytdlpDownload(
+    ctx *DownloadCtx, downloadCtxs chan *DownloadCtx, errs chan *DownloadCtx) {
+
+    cmd := exec.Command(YT_DLP, ctx.link)
+    stdout, err := cmd.Output()
+    if err != nil {
+        ctx.err = &err
+        ctx.status = JOB_STATUS_ERR
+        errs <- ctx
+        return
+    }
+    title := string(stdout)
+    title = strings.TrimSpace(title)
+    ctx.title = title
+
+    downloadCtxs <- ctx
+    
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..28df62e
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,11 @@
+module github.com/HeshamTB/yt-mdl
+
+go 1.21.0
+
+require github.com/jedib0t/go-pretty/v6 v6.4.6
+
+require (
+	github.com/mattn/go-runewidth v0.0.13 // indirect
+	github.com/rivo/uniseg v0.2.0 // indirect
+	golang.org/x/sys v0.1.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..64fd3f7
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,23 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/jedib0t/go-pretty/v6 v6.4.6 h1:v6aG9h6Uby3IusSSEjHaZNXpHFhzqMmjXcPq1Rjl9Jw=
+github.com/jedib0t/go-pretty/v6 v6.4.6/go.mod h1:Ndk3ase2CkQbXLLNf5QDHoYb6J9WtVfmHZu9n8rk2xs=
+github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4OSgU=
+github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/pkg/profile v1.6.0/go.mod h1:qBsxPvzyUincmltOk6iyRVxHYg4adc0OFOv72ZdLa18=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.4 h1:wZRexSlwd7ZXfKINDLsO4r7WBt3gTKONc6K/VesHvHM=
+github.com/stretchr/testify v1.7.4/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
+golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/yt-mdl.go b/yt-mdl.go
new file mode 100644
index 0000000..73721c9
--- /dev/null
+++ b/yt-mdl.go
@@ -0,0 +1,52 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+    "net/url"
+)
+
+var verbose bool
+var videoLinks []string
+var maxConcurrent int
+
+func init() {
+    flag.BoolVar(&verbose, "verbose", false, "Be verbose")    
+    flag.IntVar(&maxConcurrent, "goroutines", 8, "Maximum concurrent downloads")
+}
+
+func main() {
+    parseArgs()
+
+    fmt.Println("Links to be downloaded ", videoLinks)
+
+    Download(&videoLinks)
+
+}
+
+func parseArgs() {
+    flag.Parse()
+    for _, arg := range flag.Args(){
+        if !isValidURL(arg) {
+            fmt.Println("Skipping ", arg)
+            continue
+        }
+        videoLinks = append(videoLinks, arg)
+    }
+}
+
+func isValidURL(str string) bool {
+    _, err := url.ParseRequestURI(str)
+
+    if err != nil {
+        return false
+    }
+
+    u, err := url.Parse(str)
+
+    if err != nil || u.Scheme != "https" {
+        return false
+    }
+
+    return true
+}