refactoring, adding cli to edit config

pkg/data/data.go

@@ -0,0 +1,70 @@
+package data
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+)
+
+type (
+	Data struct {
+		Softwares []Software
+	}
+
+	Software struct {
+		Slug           string         `json:"slug"`
+		Name           string         `json:"name"`
+		Description    string         `json:"description"`
+		Version        string         `json:"version"`
+		IconURL        string         `json:"icon_url"`
+		ScreenshotURLs []string       `json:"screenshot_urls"`
+		DownloadLinks  []DownloadLink `json:"download_links"`
+	}
+
+	DownloadLink struct {
+		OS   string `json:"os"`
+		Arch string `json:"arch"`
+		URL  string `json:"url"`
+	}
+
+	document struct {
+		Softwares []Software `json:"softwares"`
+	}
+)
+
+func Load(path string) (Data, error) {
+	f, err := os.OpenFile(path, os.O_RDONLY, 0)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return Data{}, nil
+		}
+		return Data{}, fmt.Errorf("failed to open data file: %w", err)
+	}
+	defer f.Close()
+
+	var s document
+	d := json.NewDecoder(f)
+	err = d.Decode(&s)
+	if err != nil {
+		return Data{}, fmt.Errorf("failed to parse data file: %w", err)
+	}
+
+	return Data(s), nil
+}
+
+func Save(doc Data, path string) error {
+	f, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0740)
+	if err != nil {
+		return fmt.Errorf("failed to open data file: %w", err)
+	}
+	defer f.Close()
+
+	e := json.NewEncoder(f)
+	err = e.Encode(document(doc))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}