package appimport (	md "farga/app/middleware"	"farga/db/types"	"farga/lib/git"	"fmt"	"net/http"	"github.com/gorilla/mux")func (a *App) RepoZipDownload(w http.ResponseWriter, r *http.Request) {	vars := mux.Vars(r)	branch := vars["branch"]	dbRepo, ok := r.Context().Value(md.RepoKey).(types.Repo)	if !ok {		http.Error(w, "Internal Server Error: Middleware did not provide repo data.", http.StatusInternalServerError)		return	}	gitRepo, err := git.Repo(*dbRepo.UserID, dbRepo.ID, branch)	if err != nil {		http.Error(w, "Such a repo wasn't found.", http.StatusInternalServerError)		return	}	repoPath := git.RepoPath(*dbRepo.UserID, dbRepo.ID)	// don't waste resources if the reference is invalid.	ref, err := git.ResolveHead(gitRepo.Git, branch)	if err != nil {		http.Error(w, err.Error(), http.StatusBadRequest)		return	}	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s-%s.zip\"", dbRepo.Name, ref.Name().Short())) // name the file	err = git.ZipStream(r.Context(), repoPath, ref.Hash().String(), w)	if err != nil {		http.Error(w, err.Error(), http.StatusBadRequest)		return	}}