WIP: support different interface types: update config templates

internal/wireguard/template.go

@@ -1,53 +1,20 @@
 package wireguard
 
-var (
-	ClientCfgTpl = `#{{ .Client.Identifier }}
-[Interface]
-Address = {{ .Client.IPsStr }}
-PrivateKey = {{ .Client.PrivateKey }}
-{{- if .Server.DNSStr}}
-DNS = {{ .Server.DNSStr }}
-{{- end}}
-{{- if ne .Server.Mtu 0}}
-MTU = {{.Server.Mtu}}
-{{- end}}
-
-[Peer]
-PublicKey = {{ .Server.PublicKey }}
-{{- if .Client.PresharedKey}}
-PresharedKey = {{ .Client.PresharedKey }}
-{{- end}}
-AllowedIPs = {{ .Client.AllowedIPsStr }}
-Endpoint = {{ .Server.Endpoint }}
-{{- if and (ne .Server.PersistentKeepalive 0) (not .Client.IgnorePersistentKeepalive)}}
-PersistentKeepalive = {{.Server.PersistentKeepalive}}
-{{- end}}
-`
-	DeviceCfgTpl = `# AUTOGENERATED FILE - DO NOT EDIT
-# Updated: {{ .Server.UpdatedAt }} / Created: {{ .Server.CreatedAt }}
-[Interface]
-{{- range .Server.IPs}}
-Address = {{ . }}
-{{- end}}
-ListenPort = {{ .Server.ListenPort }}
-PrivateKey = {{ .Server.PrivateKey }}
-{{- if ne .Server.Mtu 0}}
-MTU = {{.Server.Mtu}}
-{{- end}}
-PreUp = {{ .Server.PreUp }}
-PostUp = {{ .Server.PostUp }}
-PreDown = {{ .Server.PreDown }}
-PostDown = {{ .Server.PostDown }}
-
-{{range .Clients}}
-{{if not .DeactivatedAt -}}
-# {{.Identifier}} / {{.Email}} / Updated: {{.UpdatedAt}} / Created: {{.CreatedAt}}
-[Peer]
-PublicKey = {{ .PublicKey }}
-{{- if .PresharedKey}}
-PresharedKey = {{ .PresharedKey }}
-{{- end}}
-AllowedIPs = {{ StringsJoin .IPs ", " }}
-{{- end}}
-{{end}}`
+import (
+	"embed"
+	"html/template"
+	"strings"
 )
+
+//go:embed tpl/*
+var Templates embed.FS
+
+var templateCache *template.Template
+
+func init() {
+	var err error
+	templateCache, err = template.New("server").Funcs(template.FuncMap{"StringsJoin": strings.Join}).ParseFS(Templates, "tpl/*.tpl")
+	if err != nil {
+		panic(err)
+	}
+}