[#1223] lens/tui: Add CLI flags to start search on application run

Signed-off-by: Aleksey Savchuk <a.savchuk@yadro.com>

cmd/frostfs-lens/internal/meta/tui.go

@@ -18,8 +18,27 @@ var tuiCMD = &cobra.Command{
 	Run:   tuiFunc,
 }
 
+var (
+	initialFilter   string
+	needListFilters bool
+)
+
 func init() {
 	common.AddComponentPathFlag(tuiCMD, &vPath)
+
+	tuiCMD.Flags().StringVar(
+		&initialFilter,
+		"filter",
+		"",
+		"Initial filter to start with, format <tag>:<args...>",
+	)
+
+	tuiCMD.Flags().BoolVar(
+		&needListFilters,
+		"list-filters",
+		false,
+		"List all available filters",
+	)
 }
 
 func tuiFunc(cmd *cobra.Command, _ []string) {
@@ -31,6 +50,18 @@ func runTUI(cmd *cobra.Command) error {
 	// tview.Styles.PrimitiveBackgroundColor = tcell.ColorWhite
 	// tview.Styles.GraphicsColor = tcell.ColorBlack
 
+	if needListFilters {
+		cmd.Println("tag\targs")
+		cmd.Println("---\t----")
+
+		cmd.Println("cid\t<CID>")
+		cmd.Println("oid\t<OID>")
+		cmd.Println("addr\t<CID>/<OID>")
+		cmd.Println("attr\t<key> or <key>/<value>")
+
+		return nil
+	}
+
 	db, err := openDB(false)
 	common.ExitOnErr(cmd, err)
 	defer db.Close()
@@ -46,6 +77,11 @@ func runTUI(cmd *cobra.Command) error {
 	_ = ui.AddCompositeFilter("addr", addrParser, "<CID>/<OID>")
 	_ = ui.AddCompositeFilter("attr", attributeParser, "<key> or <key>/<value>")
 
+	err = ui.WithPrompt(initialFilter)
+	if err != nil {
+		return err
+	}
+
 	app.SetRoot(ui, true).SetFocus(ui)
 
 	return app.Run()

cmd/frostfs-lens/internal/tuiutil/ui.go

@@ -452,6 +452,18 @@ func (ui *UI) handleInputOnSearching(event *tcell.EventKey) {
 	ui.Box.MouseHandler()
 }
 
+func (ui *UI) WithPrompt(prompt string) error {
+	filter, err := ui.processPrompt(prompt)
+	if err != nil {
+		return err
+	}
+
+	ui.pageToMount = NewBucketsView(ui, filter)
+	ui.searchBar.SetText(prompt)
+
+	return nil
+}
+
 func (ui *UI) processPrompt(prompt string) (filter *Filter, err error) {
 	if prompt == "" {
 		return NewFilter(nil), nil