1 files changed, 63 insertions, 0 deletions
diff --git a/internal/config/cache.go b/internal/config/cache.go
new file mode 100644
index 0000000..825af7f
--- /dev/null
+++ b/internal/config/cache.go
@@ -0,0 +1,63 @@
+package config
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+)
+
+type API struct {
+	Token string `json:"token"`
+}
+
+func LoadAPI() (*API, error) {
+	data, err := os.ReadFile(APIPath())
+	if err != nil {
+		return nil, err
+	}
+
+	var a API
+	if err := json.Unmarshal(data, &a); err != nil {
+		return nil, err
+	}
+	return &a, nil
+}
+
+type ModState struct {
+	Compatible string `json:"compatible"`
+	Latest     string `json:"latest"`
+}
+
+type Cache map[string]ModState
+
+func CachePath() string {
+	return filepath.Join("cache", "mod_versions.json")
+}
+
+func LoadCache() (Cache, error) {
+	data, err := os.ReadFile(CachePath())
+	if err != nil {
+		if os.IsNotExist(err) {
+			return Cache{}, nil
+		}
+		return nil, err
+	}
+
+	cache := Cache{}
+	if err := json.Unmarshal(data, &cache); err != nil {
+		return nil, err
+	}
+	return cache, nil
+}
+
+func SaveCache(cache Cache) error {
+	if err := os.MkdirAll(filepath.Dir(CachePath()), 0o755); err != nil {
+		return err
+	}
+
+	data, err := json.MarshalIndent(cache, "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(CachePath(), data, 0o644)
+}