chore: I have no fucking idea

This is vibecoded shit but i can't be bothered to do it myself.
Nobody else besides me is gonna be using this, and this wont ever be
extended or anything, so I just don't care.

config.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"os"
 
 	"gopkg.in/yaml.v3"
@@ -13,11 +14,10 @@ type HomeserverConfig struct {
 
 type AppserviceConfig struct {
 	ID           string `yaml:"id"`
+	Address      string `yaml:"address"`
+	BotLocalpart string `yaml:"bot_localpart"`
 	ASToken      string `yaml:"as_token"`
 	HSToken      string `yaml:"hs_token"`
-	BotLocalpart string `yaml:"bot_localpart"`
-	Address      string `yaml:"address"`
-	Port         uint16 `yaml:"port"`
 }
 
 type BridgeConfig struct {
@@ -40,32 +40,37 @@ func LoadConfig(path string) (*Config, error) {
 	if err = yaml.Unmarshal(data, cfg); err != nil {
 		return nil, err
 	}
-	if cfg.Bridge.Permissions == nil {
-		cfg.Bridge.Permissions = make(map[string]string)
-	}
-	if cfg.Bridge.NtfyURL == "" {
-		cfg.Bridge.NtfyURL = "https://ntfy.sh"
-	}
-	if cfg.Appservice.Address == "" {
-		cfg.Appservice.Address = "0.0.0.0"
-	}
-	if cfg.Appservice.Port == 0 {
-		cfg.Appservice.Port = 8080
-	}
+	cfg.applyDefaults()
 	return cfg, nil
 }
 
-func (b *BridgeConfig) PermissionLevel(id string) string {
-	if level, ok := b.Permissions[id]; ok {
-		return level
+func (c *Config) applyDefaults() {
+	if c.Bridge.Permissions == nil {
+		c.Bridge.Permissions = make(map[string]string)
+	}
+	if c.Bridge.NtfyURL == "" {
+		c.Bridge.NtfyURL = "https://ntfy.sh"
+	}
+	if c.Appservice.ID == "" {
+		c.Appservice.ID = "ntfy-bridge"
+	}
+	if c.Appservice.Address == "" {
+		c.Appservice.Address = "0.0.0.0"
 	}
-	return ""
 }
 
-func (b *BridgeConfig) HasPermission(userID, requiredLevel string) bool {
-	level := b.PermissionLevel(userID)
+func (c *Config) Save(path string) error {
+	data, err := yaml.Marshal(c)
+	if err != nil {
+		return fmt.Errorf("marshal config: %w", err)
+	}
+	return os.WriteFile(path, data, 0600)
+}
+
+func (c *BridgeConfig) HasPermission(userID, requiredLevel string) bool {
+	level := c.PermissionLevel(userID)
 	if level == "" {
-		level = b.PermissionLevel("*")
+		level = c.PermissionLevel("*")
 	}
 	if level == "" {
 		return false
@@ -75,3 +80,10 @@ func (b *BridgeConfig) HasPermission(userID, requiredLevel string) bool {
 	}
 	return true
 }
+
+func (c *BridgeConfig) PermissionLevel(id string) string {
+	if level, ok := c.Permissions[id]; ok {
+		return level
+	}
+	return ""
+}