feat: initial project commit

commit to push first working snapshot to codeberg

pkg/download/download.go

@@ -0,0 +1,60 @@
+package download
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"time"
+
+	"fyne.io/fyne/v2/widget"
+)
+
+func WithProgressBar(downloadURL, filePath string, progressBar *widget.ProgressBar) error {
+	client := &http.Client{
+		Timeout: 15 * time.Minute,
+	}
+
+	resp, err := client.Get(downloadURL)
+	if err != nil {
+		return fmt.Errorf("download failed: %v", err)
+	}
+	defer resp.Body.Close()
+
+	file, err := os.Create(filePath)
+	if err != nil {
+		return fmt.Errorf("unable to create file: %v", err)
+	}
+	defer file.Close()
+
+	contentLength := resp.ContentLength
+	if contentLength <= 0 {
+		return fmt.Errorf("invalid content length")
+	}
+
+	progressBar.Max = float64(contentLength)
+
+	buffer := make([]byte, 4096)
+	var totalBytes int64
+
+	for {
+		n, readErr := resp.Body.Read(buffer)
+		if n > 0 {
+			totalBytes += int64(n)
+			progressBar.SetValue(float64(totalBytes))
+
+			if _, writeErr := file.Write(buffer[:n]); writeErr != nil {
+				return fmt.Errorf("error writing to file: %v", writeErr)
+			}
+		}
+
+		if readErr == io.EOF {
+			break
+		}
+		if readErr != nil {
+			return fmt.Errorf("download aborted: %v", readErr)
+		}
+	}
+
+	return nil
+}