add index ls command, add table and color support

pkg/es/table.go

@@ -0,0 +1,108 @@
+/*
+Copyright © 2026 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+package es
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+
+	"github.com/olekukonko/tablewriter"
+	"github.com/olekukonko/tablewriter/renderer"
+	"github.com/olekukonko/tablewriter/tw"
+)
+
+type Table struct {
+	headers []string
+	entries [][]string
+}
+
+func NewTable(size int) *Table {
+	table := Table{}
+
+	table.headers = make([]string, size)
+	table.entries = make([][]string, size)
+
+	return &table
+}
+
+func (data *Table) PrintMarkdown() error {
+	tableString := &strings.Builder{}
+
+	table := tablewriter.NewTable(tableString,
+		tablewriter.WithRenderer(
+			renderer.NewBlueprint(
+				tw.Rendition{
+					Borders: tw.Border{
+						Left:   tw.On,
+						Right:  tw.On,
+						Top:    tw.Off,
+						Bottom: tw.Off,
+					},
+					Settings: tw.Settings{
+						Separators: tw.Separators{
+							ShowHeader:     tw.On,
+							ShowFooter:     tw.Off,
+							BetweenRows:    tw.Off,
+							BetweenColumns: 0,
+						},
+					},
+					Symbols: tw.NewSymbols(tw.StyleMarkdown),
+				})),
+
+		tablewriter.WithConfig(
+			tablewriter.Config{
+				Header: tw.CellConfig{
+					Formatting: tw.CellFormatting{
+						Alignment:  tw.AlignLeft,
+						AutoFormat: tw.Off,
+					},
+				},
+				Row: tw.CellConfig{
+					Formatting: tw.CellFormatting{
+						Alignment: tw.AlignLeft,
+					},
+				},
+			},
+		),
+	)
+
+	table.Header(data.headers)
+
+	if err := table.Bulk(data.entries); err != nil {
+		return fmt.Errorf("Failed to add data to table renderer: %s", err)
+	}
+
+	if err := table.Render(); err != nil {
+		fmt.Errorf("Failed to render table: %s", err)
+	}
+
+	fmt.Println(tableString.String())
+
+	return nil
+}
+
+func (data *Table) Sort() {
+	// sanity checks
+	if len(data.entries) == 0 {
+		return
+	}
+
+	sort.Slice(data.entries, func(i, j int) bool {
+		return data.entries[i][0] < data.entries[j][0]
+	})
+}