1 files changed, 61 insertions, 11 deletions
diff --git a/internal/config/config.go b/internal/config/config.go
index 35842a1..05d96ad 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -7,17 +7,55 @@ import (
 )
 
 type Config struct {
-	ChannelID            string   `json:"channel_id"`
-	CheckIntervalMinutes int      `json:"check_interval_minutes"`
-	MinecraftVersion     string   `json:"minecraft_version"`
-	FabricLoaderVersion  string   `json:"fabric_loader_version"`
-	LoaderMetaVersion    string   `json:"loader_meta_version"`
-	JavaPath             string   `json:"java_path"`
-	ServerLocation       string   `json:"server_location"`
-	BackupLocation       string   `json:"backup_location"`
-	MergePreCommand      string   `json:"merge_pre_command"`
-	MergePostCommand     string   `json:"merge_post_command"`
-	ModrinthMods         []string `json:"modrinth_mods"`
+	ChannelID            string `json:"channel_id"`
+	CheckIntervalMinutes int    `json:"check_interval_minutes"`
+	MinecraftVersion     string `json:"minecraft_version"`
+	FabricLoaderVersion  string `json:"fabric_loader_version"`
+	LoaderMetaVersion    string `json:"loader_meta_version"`
+	JavaPath             string `json:"java_path"`
+	ServerLocation       string `json:"server_location"`
+	BackupLocation       string `json:"backup_location"`
+	MergePreCommand      string `json:"merge_pre_command"`
+	MergePostCommand     string `json:"merge_post_command"`
+	ModrinthMods         []Mod  `json:"modrinth_mods"`
+}
+
+type Mod struct {
+	Slug    string
+	Version string
+}
+
+func (m Mod) Pinned() bool {
+	return m.Version != ""
+}
+
+func (m Mod) MarshalJSON() ([]byte, error) {
+	if m.Version == "" {
+		return json.Marshal(m.Slug)
+	}
+	return json.Marshal(modObject{Slug: m.Slug, Version: m.Version})
+}
+
+func (m *Mod) UnmarshalJSON(data []byte) error {
+	var slug string
+	if err := json.Unmarshal(data, &slug); err == nil {
+		m.Slug = slug
+		m.Version = ""
+		return nil
+	}
+
+	var obj modObject
+	if err := json.Unmarshal(data, &obj); err != nil {
+		return err
+	}
+	m.Slug = obj.Slug
+	m.Version = obj.Version
+	return nil
+}
+
+type modObject struct {
+	Slug    string `json:"slug"`
+	Version string `json:"version"`
 }
 
 const Dir = "config"
@@ -43,3 +81,15 @@ func Load() (*Config, error) {
 
 	return &c, nil
 }
+
+func Save(cfg *Config) error {
+	if err := os.MkdirAll(Dir, 0o755); err != nil {
+		return err
+	}
+
+	data, err := json.MarshalIndent(cfg, "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(Path(), append(data, '\n'), 0o644)
+}