Implement configuration file

Abstract settings which commonly differ between instances to a YAML
based configuration file to allow for easy administration without the
need for modifying the source code.

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

1 files changed, 93 insertions, 22 deletions

diff --git a/main.go b/main.go
index e817bcc..2ae52d0 100644
--- a/main.go
+++ b/main.go
@@ -1,40 +1,111 @@
 package main
 
-import "fmt"
-import "crypto/tls"
+import (
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"log"
+	"os"
 
-import "github.com/go-irc/irc"
-import "github.com/namsral/flag"
+	"flag"
+	"github.com/go-irc/irc"
 
-import "git.circuitco.de/self/watbot/wat"
+	"git.circuitco.de/self/watbot/wat"
+	"github.com/creasty/defaults"
+	"gopkg.in/yaml.v3"
+)
+
+type Config struct {
+	Watbot		watConfig	`yaml:"watbot"`
+}
+
+type watConfig struct {
+	Nick		string		`yaml:"nick"`
+	Pass		string		`yaml:"pass"`
+	User		string		`yaml:"user"`
+	Name		string		`yaml:"name"`
+	Admins		struct {
+		Hosts []string		`yaml:"hosts"`
+	}				`yaml:"admins"`
+	Channels 	struct {
+		Permitted []string	`yaml:"permitted"`
+	}				`yaml:"channels"`
+	Ignores struct {
+		Hosts []string		`yaml:"hosts"`
+	}				`yaml:"ignores"`
+	Server struct {
+		Host string		`yaml:"host"`
+		Port int		`default:"6697" yaml:"port"`
+		TlsVerify bool		`default:"true" yaml:"tls_verify"`
+	}				`yaml:"server"`
+}
+
+func readConfig(configPath string) (*watConfig, error) {
+	allConfig := Config{}
+
+	buffer, err := os.ReadFile(configPath)
+	if err != nil {
+		return nil, fmt.Errorf("Could not read configuration file: %s", err)
+	}
+
+	err = yaml.Unmarshal(buffer, &allConfig)
+	if err != nil {
+		return nil, fmt.Errorf("Could not parse configuration file: %s", err)
+	}
+
+	config := &allConfig.Watbot
+	defaults.Set(config)
+
+	if config.Server.Host == "" {
+		return nil, errors.New("Shall I play wattery to know where to connect to?")
+	}
+
+	if config.Name != "" && config.Nick == "" {
+		config.Nick = config.Name
+	}
+	
+	if config.Nick != "" && config.User == "" {
+		config.User = config.Nick
+	}
+
+	if config.Name == "" || config.Nick == "" || config.User == "" {
+		return nil, errors.New("Don't know who I am.")
+	}
+
+	return config, nil
+}
 
 func main() {
-	pass := flag.String("pass", "", "password")
+	var configPathArg string
+	flag.StringVar(&configPathArg, "config", "config.yaml", "Path to configuration file")
 	flag.Parse()
-	fmt.Printf("PASS len %d\n", len(*pass))
-	config := irc.ClientConfig{
-		Nick: "watt",
-		Pass: *pass,
-		User: "wat",
-		Name: "wat",
+	log.Println("Starting with configuration:", configPathArg)
+
+	config, err := readConfig(configPathArg)
+	if err != nil {
+		log.Fatalln(err)
+		os.Exit(1)
+	}
+
+	ircConfig := irc.ClientConfig{
+		Nick: config.Nick,
+		Pass: config.Pass,
+		User: config.User,
+		Name: config.Name,
 	}
 	watConfig := wat.WatConfig{
-		PermittedChannels: []string{
-			"#lucy",
-			"#sweden",
-		},
-		IgnoredHosts: []string{
-			"tripsit/user/creatonez",
-		},
+		PermittedChannels: config.Channels.Permitted,
+		IgnoredHosts:      config.Ignores.Hosts,
+		AdminHosts:        config.Admins.Hosts,
 	}
 	tcpConf := &tls.Config{
-		InsecureSkipVerify: true,
+		InsecureSkipVerify: !config.Server.TlsVerify,
 	}
-	conn, err := tls.Dial("tcp", "127.0.0.1:6697", tcpConf)
+	conn, err := tls.Dial("tcp", fmt.Sprintf("%s:%d", config.Server.Host, config.Server.Port), tcpConf)
 	if err != nil {
 		fmt.Println("err " + err.Error())
 		return
 	}
-	wwat := wat.NewWatBot(&config, &watConfig, conn)
+	wwat := wat.NewWatBot(&ircConfig, &watConfig, conn)
 	wwat.Run()
 }