f-25: code: move load data to dedicated function

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

internal/subnet/data.go

@@ -0,0 +1,72 @@
+package subnet
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+	"strings"
+
+	"git.g3e.fr/syonad/two/pkg/db/kv"
+	"github.com/dgraph-io/badger/v4"
+)
+
+type subnetData struct {
+	vpc        string
+	subnetID   string
+	bridge     string
+	vxlanID    int
+	localIface string
+	gatewayIP  net.IP
+	cidr       *net.IPNet
+}
+
+func loadSubnet(db *badger.DB, name string) (subnetData, error) {
+	var d subnetData
+
+	d.subnetID = strings.SplitN(name, "-", 2)[1]
+	d.bridge = "br-" + d.subnetID
+
+	vpc, err := kv.GetFromDB(db, "subnet/"+name+"/vpc")
+	if err != nil {
+		return d, fmt.Errorf("get vpc: %w", err)
+	}
+	d.vpc = vpc
+
+	vxlanIDStr, err := kv.GetFromDB(db, "subnet/"+name+"/vxlan_id")
+	if err != nil {
+		return d, fmt.Errorf("get vxlan_id: %w", err)
+	}
+	vxlanID, err := strconv.Atoi(vxlanIDStr)
+	if err != nil {
+		return d, fmt.Errorf("parse vxlan_id: %w", err)
+	}
+	d.vxlanID = vxlanID
+
+	localIface, err := kv.GetFromDB(db, "subnet/"+name+"/local_iface")
+	if err != nil {
+		return d, fmt.Errorf("get local_iface: %w", err)
+	}
+	d.localIface = localIface
+
+	gatewayIPStr, err := kv.GetFromDB(db, "subnet/"+name+"/gateway_ip")
+	if err != nil {
+		return d, fmt.Errorf("get gateway_ip: %w", err)
+	}
+	gatewayIP := net.ParseIP(gatewayIPStr)
+	if gatewayIP == nil {
+		return d, fmt.Errorf("invalid gateway_ip: %s", gatewayIPStr)
+	}
+	d.gatewayIP = gatewayIP
+
+	cidrStr, err := kv.GetFromDB(db, "subnet/"+name+"/cidr")
+	if err != nil {
+		return d, fmt.Errorf("get cidr: %w", err)
+	}
+	_, ipNet, err := net.ParseCIDR(cidrStr)
+	if err != nil {
+		return d, fmt.Errorf("parse cidr: %w", err)
+	}
+	d.cidr = ipNet
+
+	return d, nil
+}