ported over extract function

.gitignore

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+build
+lastfm-data
+spotify-data

go.mod

@@ -0,0 +1,3 @@
+module muzi
+
+go 1.25.4

muzi.go

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+package main
+
+import "archive/zip"
+import "path/filepath"
+import "fmt"
+import "strings"
+import "os"
+import "io"
+
+func extract(path string, target string) {
+	archive, err := zip.OpenReader(path)
+	if (err != nil) {
+		panic(err)
+	}
+	defer archive.Close()
+
+	zipDir := filepath.Base(path)
+	zipDir = zipDir[:(strings.LastIndex(zipDir, "."))]
+	target = filepath.Join(target, zipDir)
+
+	for _, f := range archive.File {
+		filePath := filepath.Join(target, f.Name)
+		fmt.Println("extracting:", filePath)
+		
+		if !strings.HasPrefix(filePath, filepath.Clean(target) + string(os.PathSeparator)) {
+			fmt.Println("Invalid file path")
+			return
+		}
+		if f.FileInfo().IsDir() {
+			fmt.Println("Creating Directory")
+			os.MkdirAll(filePath, os.ModePerm)
+			continue
+		}
+		if err := os.MkdirAll(filepath.Dir(filePath), os.ModePerm); err != nil {
+			panic(err)
+		}
+		fileToExtract, err := os.OpenFile(filePath, os.O_WRONLY | os.O_CREATE | os.O_TRUNC, f.Mode())
+		if err != nil {
+			panic(err)
+		}
+		extractedFile, err := f.Open()
+		if err != nil {
+			panic(err)
+		}
+		if _, err := io.Copy(fileToExtract, extractedFile); err != nil {
+			panic(err)
+		}
+		fileToExtract.Close()
+		extractedFile.Close()
+	}
+}
+
+func main() {
+	extract("./spotify-data/zip/rileyman35@gmail.com-my_spotify_data.zip", "./spotify-data/extracted/")
+}