From 0994cea0b1b0ed926c3821e0664d24b11bfddea4 Mon Sep 17 00:00:00 2001
From: Jonas Knobloch <jonas.knobloch@t-online.de>
Date: Mon, 16 Mar 2026 16:22:46 +0100
Subject: Add progress bar

---
 go.work            |  1 +
 tui/go.mod         |  3 +++
 tui/progressbar.go | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 68 insertions(+)
 create mode 100644 tui/go.mod
 create mode 100644 tui/progressbar.go

diff --git a/go.work b/go.work
index 4963ab5..0c4ec81 100644
--- a/go.work
+++ b/go.work
@@ -6,4 +6,5 @@ use (
 	./gpt2
 	./llm
 	./tensor
+	./tui
 )
diff --git a/tui/go.mod b/tui/go.mod
new file mode 100644
index 0000000..af968c1
--- /dev/null
+++ b/tui/go.mod
@@ -0,0 +1,3 @@
+module go.jknobloc.com/x/tui
+
+go 1.25.0
diff --git a/tui/progressbar.go b/tui/progressbar.go
new file mode 100644
index 0000000..73a0c6a
--- /dev/null
+++ b/tui/progressbar.go
@@ -0,0 +1,64 @@
+package tui
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+type ProgressBar struct {
+	title string
+	width int
+	steps int
+	n     int
+	start time.Time
+}
+
+func NewProgressBar(title string, width, steps int, start time.Time) *ProgressBar {
+	pb := &ProgressBar{
+		title: title,
+		width: width,
+		steps: steps,
+		start: start,
+	}
+
+	pb.Print()
+
+	return pb
+}
+
+func (p *ProgressBar) Increment() {
+	p.n++
+}
+
+func (p *ProgressBar) Update(steps int) {
+	p.n = steps
+}
+
+func (p *ProgressBar) Print() {
+	fmt.Print(p.String())
+}
+
+func (p *ProgressBar) Finish() {
+	fmt.Println()
+}
+
+func (p *ProgressBar) String() string {
+	progress := int(float64(p.n) / float64(p.steps) * float64(p.width))
+	percentage := int(float64(p.n) / float64(p.steps) * 100)
+
+	lap := time.Since(p.start)
+
+	duration := fmt.Sprintf("%02d:%02d:%02d", int(lap.Hours()), int(lap.Minutes())%60, int(lap.Seconds())%60)
+
+	return fmt.Sprintf(
+		"\r[%s] %-20s %3d%% [%s%s] %d/%d",
+		duration,
+		p.title,
+		percentage,
+		strings.Repeat("=", min(progress, p.width)),
+		strings.Repeat("-", max(0, p.width-progress)),
+		p.n,
+		p.steps,
+	)
+}
-- 
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