add Export function to core.FullData

core/core.go

@@ -15,6 +15,7 @@ package core
 import (
 	"encoding/json"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -81,3 +82,23 @@ func (d *FullData) WriteJSON(dataPath string) error {
 	err = os.Rename(path, filepath.Join(dataPath, "comitium.json"))
 	return err
 }
+
+func (d *FullData) Export(w io.Writer) {
+	fmt.Fprint(w, "# comitium subscribed feeds\n## Feeds\n\n")
+	d.FeedsMu.RLock()
+	for _, v := range d.Feeds {
+		fmt.Fprintf(w, "=> %v %v\n", v.FeedLink, v.Title)
+	}
+	d.FeedsMu.RUnlock()
+
+	fmt.Fprint(w, "\n\n## Pages\n\n")
+	d.PagesMu.RLock()
+	for _, v := range d.Pages {
+		fmt.Fprintf(w, "=> %v", v.Link)
+		if v.Title != "" {
+			fmt.Fprintf(w, " %v", v.Title)
+		}
+		fmt.Fprint(w, "\n")
+	}
+	d.PagesMu.RUnlock()
+}