Handle actions

model/action.go

@@ -0,0 +1,123 @@
+package reveil
+
+import (
+	"bufio"
+	"crypto/sha512"
+	"errors"
+	"io/fs"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"git.nemunai.re/nemunaire/reveil/config"
+)
+
+type Action struct {
+	Id          Identifier `json:"id"`
+	Name        string     `json:"name"`
+	Description string     `json:"description,omitempty"`
+	Path        string     `json:"path"`
+	Enabled     bool       `json:"enabled"`
+}
+
+func LoadAction(path string) (string, string, error) {
+	fd, err := os.Open(path)
+	if err != nil {
+		return "", "", err
+	}
+	defer fd.Close()
+
+	fileScanner := bufio.NewScanner(fd)
+	fileScanner.Split(bufio.ScanLines)
+
+	var (
+		shebang     = false
+		name        = ""
+		description = ""
+	)
+	for fileScanner.Scan() {
+		line := strings.TrimSpace(fileScanner.Text())
+		if !shebang {
+			if len(line) < 2 || line[0] != '#' || line[1] != '!' {
+				return name, description, errors.New("Not a valid action file (shebang not found).")
+			}
+			shebang = true
+			continue
+		}
+
+		if len(line) < 2 || line[0] != '#' {
+			if len(description) > 0 {
+				return name, strings.TrimSpace(description), nil
+			}
+
+			continue
+		}
+
+		if len(name) == 0 {
+			name = strings.TrimSpace(line[1:])
+		} else {
+			description += strings.TrimSpace(line[1:]) + "\n"
+		}
+	}
+
+	return name, description, nil
+}
+
+func LoadActions(cfg *config.Config) (actions []*Action, err error) {
+	err = filepath.Walk(cfg.ActionsDir, func(path string, d fs.FileInfo, err error) error {
+		if d.Mode().IsRegular() {
+			hash := sha512.Sum512([]byte(path))
+
+			// Parse content
+			name, description, err := LoadAction(path)
+			if err != nil {
+				log.Printf("Invalid action file (trying to parse %s): %s", path, err.Error())
+				// Ignore invalid files
+				return nil
+			}
+
+			if description == "" {
+				return nil
+			}
+
+			actions = append(actions, &Action{
+				Id:          hash[:],
+				Name:        name,
+				Description: description,
+				Path:        path,
+				Enabled:     d.Mode().Perm()&0111 != 0,
+			})
+		}
+
+		return nil
+	})
+
+	return
+}
+
+func (a *Action) Rename(name string) error {
+	return errors.New("Not implemeted")
+}
+
+func (a *Action) Enable() error {
+	fi, err := os.Stat(a.Path)
+	if err != nil {
+		return err
+	}
+
+	return os.Chmod(a.Path, fi.Mode().Perm()|0111)
+}
+
+func (a *Action) Disable() error {
+	fi, err := os.Stat(a.Path)
+	if err != nil {
+		return err
+	}
+
+	return os.Chmod(a.Path, fi.Mode().Perm()&0666)
+}
+
+func (a *Action) Remove() error {
+	return os.Remove(a.Path)
+}