feat: Add pcap import, file browser, logging, local capture, and stable call ordering

internal/config/loader.go

@@ -0,0 +1,72 @@
+package config
+
+import (
+	"encoding/json"
+	"os"
+)
+
+// LoadNetworkMap loads a network map from a JSON file
+func LoadNetworkMap(path string) (*NetworkMap, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	var nm NetworkMap
+	if err := json.Unmarshal(data, &nm); err != nil {
+		return nil, err
+	}
+
+	return &nm, nil
+}
+
+// SaveNetworkMap saves a network map to a JSON file
+func SaveNetworkMap(nm *NetworkMap, path string) error {
+	data, err := json.MarshalIndent(nm, "", "  ")
+	if err != nil {
+		return err
+	}
+
+	return os.WriteFile(path, data, 0644)
+}
+
+// DefaultNetworkMapPath returns a default path for the network map file
+func DefaultNetworkMapPath() string {
+	return "network_map.json"
+}
+
+// CreateSampleNetworkMap creates a sample network map for testing
+func CreateSampleNetworkMap() *NetworkMap {
+	nm := NewNetworkMap()
+
+	nm.AddNode(NetworkNode{
+		Name:        "Asterisk PBX",
+		IP:          "192.168.1.10",
+		Type:        NodeTypePBX,
+		Description: "Main PBX server",
+	})
+
+	nm.AddNode(NetworkNode{
+		Name:        "Kamailio Proxy",
+		IP:          "192.168.1.20",
+		Type:        NodeTypeProxy,
+		Aliases:     []string{"10.0.0.20"},
+		Description: "SIP proxy/load balancer",
+	})
+
+	nm.AddNode(NetworkNode{
+		Name:        "RTPEngine",
+		IP:          "192.168.1.30",
+		Type:        NodeTypeMediaServer,
+		Description: "Media relay server",
+	})
+
+	nm.AddNode(NetworkNode{
+		Name:        "PSTN Gateway",
+		IP:          "192.168.1.40",
+		Type:        NodeTypeGateway,
+		Description: "Gateway to PSTN",
+	})
+
+	return nm
+}