stuff

go.mod

@@ -1 +1,3 @@
+module git.tilde.town/tildetown/town
+
 go 1.14

town.go

@@ -0,0 +1,41 @@
+package town
+
+import (
+	"bytes"
+	"fmt"
+	"os/exec"
+	"os/user"
+)
+
+const adminGroup = "admin"
+
+func IsAdmin(u os.User) (bool, error) {
+	adminGroup, err := user.LookupGroup(adminGroup)
+	if err != nil {
+		return false, fmt.Errorf("failed to get admin group info: %w", err)
+	}
+
+	groupIds, err := u.GroupIds()
+	if err != nil {
+		return false, fmt.Errorf("failed to get groups info: %w", err)
+	}
+
+	for _, groupId := range groupIds {
+		if groupId == adminGroup.Gid {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}
+
+func SendLocalEmail(username, subject, body string) error {
+	cmd := exec.Command("/usr/sbin/sendmail", "-s", subject, username)
+	cmd.Stdin = bytes.NewBufferString(body)
+
+	if err := cmd.Run(); err != nil {
+		return fmt.Errof("failed to send local email: %w", err)
+	}
+
+	return nil
+}