finished: check update

service/download.go

@@ -0,0 +1,83 @@
+package service
+
+import (
+    "fmt"
+    "io"
+    "net/http"
+    "os"
+    "strconv"
+)
+
+// ProgressWriter is a custom writer to track progress and execute a callback
+type ProgressWriter struct {
+    io.Writer
+    Total     int64
+    Progress  int64
+    Callback  func(progress int64, total int64)
+}
+
+func (pw *ProgressWriter) Write(p []byte) (int, error) {
+    n, err := pw.Writer.Write(p)
+    if err != nil {
+        return n, err
+    }
+    pw.Progress += int64(n)
+    pw.Callback(pw.Progress, pw.Total)
+    return n, nil
+}
+
+func DownloadFile(url string, filePath string, overwrite bool, callback func(progress int64, total int64)) error {
+    // Check if the file exists
+    if _, err := os.Stat(filePath); err == nil {
+        if overwrite {
+            // Overwrite the file if it exists
+            if err := os.Remove(filePath); err != nil {
+                return err
+            }
+        } else {
+            return fmt.Errorf("file %s already exists", filePath)
+        }
+    }
+
+    // Create the file
+    out, err := os.Create(filePath)
+    if err != nil {
+        return err
+    }
+    defer out.Close()
+
+    // Get the data
+    resp, err := http.Get(url)
+    if err != nil {
+        return err
+    }
+    defer resp.Body.Close()
+
+
+    // Check server response
+    if resp.StatusCode != http.StatusOK {
+        return fmt.Errorf("bad status: %s", resp.Status)
+    }
+
+    // Get the size
+    size, err := strconv.Atoi(resp.Header.Get("Content-Length"))
+    if err != nil {
+        return err
+    }
+
+    // Create progress writer
+    pw := &ProgressWriter{
+        Writer:   out,
+        Total:    int64(size),
+        Callback: callback,
+    }
+
+    // Write the body to file with progress
+    _, err = io.Copy(pw, resp.Body)
+    if err != nil {
+        return err
+    }
+
+    fmt.Println("\nDownload complete")
+    return nil
+}