core/handlers/teachers.go

package api

import (
	"fmt"
	"net/http"

	"github.com/gorilla/mux"
	"gogs.carducci-dante.gov.it/karmen/core/orm"
	"gogs.carducci-dante.gov.it/karmen/core/renderer"
)

func generalHandler(base, path string) http.Handler {
	fn := func(w http.ResponseWriter, r *http.Request) {
		var (
			ok     bool
			getFn  orm.GetFn
			postFn orm.PostFn
		)
		if r.Method == "GET" {
			getFn, ok = orm.Get[path]
		} else {
			postFn, ok = orm.Post[path]
		}
		if !ok {
			renderer.Render[r.URL.Query()["format"][0]](w, r, fmt.Errorf("Can't find ORM function for path %s!", path))
		} else {
			if r.Method == "GET" {
				data, err := getFn(mux.Vars(r))
				if err != nil {
					renderer.Render[r.URL.Query()["format"][0]](w, r, err)
				} else {
					renderer.Render[r.URL.Query()["format"][0]](w, r, data, r.URL.Query())
				}
			} else {
				data, err := postFn(mux.Vars(r), r)
				if err != nil {
					renderer.Render["html"](w, r, err)
				} else {
					if mux.Vars(r)["id"] != "" {
						http.Redirect(w, r,
							fmt.Sprintf(
								"/%s/%s?format=html&tpl_layout=base&tpl_content=%s_show",
								base,
								mux.Vars(r)["id"],
								base,
							),
							http.StatusSeeOther,
						)
					} else {
						http.Redirect(w, r,
							fmt.Sprintf(
								"/%s/%d?format=html&tpl_layout=base&tpl_content=%s_show",
								base,
								data.GetID(),
								base,
							),
							http.StatusSeeOther,
						)
					}

				}
			}
		}
	}

	return http.HandlerFunc(fn)
}