Handle gongs

model/gong.go

@@ -0,0 +1,86 @@
+package reveil
+
+import (
+	"crypto/sha512"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"git.nemunai.re/nemunaire/reveil/config"
+)
+
+const CURRENT_GONG = "_current_gong"
+
+type Gong struct {
+	Id      []byte `json:"id"`
+	Name    string `json:"name"`
+	Path    string `json:"path"`
+	Enabled bool   `json:"enabled"`
+}
+
+func currentGongPath(cfg *config.Config) string {
+	return filepath.Join(cfg.GongsDir, CURRENT_GONG)
+}
+
+func LoadGongs(cfg *config.Config) (gongs []*Gong, err error) {
+	// Retrieve the path of the current gong
+	current_gong, err := os.Readlink(currentGongPath(cfg))
+	if err == nil {
+		current_gong, _ = filepath.Abs(filepath.Join(cfg.GongsDir, current_gong))
+	}
+
+	// Retrieve the list
+	err = filepath.Walk(cfg.GongsDir, func(path string, d fs.FileInfo, err error) error {
+		if d.Mode().IsRegular() {
+			hash := sha512.Sum512([]byte(path))
+			pabs, _ := filepath.Abs(path)
+			gongs = append(gongs, &Gong{
+				Id:      hash[:63],
+				Name:    strings.TrimSuffix(d.Name(), filepath.Ext(d.Name())),
+				Path:    path,
+				Enabled: current_gong == pabs,
+			})
+		}
+
+		return nil
+	})
+
+	return
+}
+
+func (g *Gong) Rename(newName string) error {
+	newPath := filepath.Join(filepath.Dir(g.Path), newName+filepath.Ext(g.Path))
+
+	err := os.Rename(
+		g.Path,
+		newPath,
+	)
+	if err != nil {
+		return err
+	}
+
+	g.Path = newPath
+	return nil
+}
+
+func (g *Gong) SetDefault(cfg *config.Config) error {
+	linkpath := currentGongPath(cfg)
+	os.Remove(linkpath)
+
+	pabs, err := filepath.Abs(g.Path)
+	if err != nil {
+		pabs = g.Path
+	}
+
+	gdirabs, err := filepath.Abs(cfg.GongsDir)
+	if err != nil {
+		gdirabs = cfg.GongsDir
+	}
+
+	return os.Symlink(strings.TrimPrefix(strings.TrimPrefix(pabs, gdirabs), "/"), linkpath)
+}
+
+func (g *Gong) Remove() error {
+	return os.Remove(g.Path)
+}