Added CSV to ASCII table

textfilters.go

@@ -5,6 +5,7 @@ import (
 	"bytes"
 	"context"
 	"encoding/base64"
+	"encoding/csv"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -12,6 +13,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"unicode/utf8"
 
 	"text/template"
 
@@ -184,6 +186,64 @@ var TextFilters = map[string]TextProcessor{
 			return TextFilterResponse{Output: dst.String()}, nil
 		},
 	},
+	"csv-to-ascii-table": {
+		Label: "Convert: CSV to ASCII Table",
+		Filter: func(ctx context.Context, input string) (resp TextFilterResponse, err error) {
+			endNL := ""
+			if strings.HasSuffix(input, "\n") {
+				endNL = "\n"
+			}
+
+			reader := csv.NewReader(strings.NewReader(input))
+			reader.FieldsPerRecord = -1
+			records, err := reader.ReadAll()
+			if err != nil {
+				return TextFilterResponse{}, err
+			}
+			if len(records) == 0 {
+				return TextFilterResponse{Output: input}, nil
+			}
+
+			var colWidths []int
+			for _, record := range records {
+				for i, cell := range record {
+					if i >= len(colWidths) {
+						colWidths = append(colWidths, 0)
+					}
+					colWidths[i] = max(colWidths[i], utf8.RuneCountInString(cell))
+				}
+			}
+
+			writeRow := func(dst *strings.Builder, cells []string) {
+				line := make([]string, len(colWidths))
+				for i, width := range colWidths {
+					cell := ""
+					if i < len(cells) {
+						cell = cells[i]
+					}
+					line[i] = cell + strings.Repeat(" ", width-utf8.RuneCountInString(cell))
+				}
+				dst.WriteString(strings.TrimRight(strings.Join(line, " "), " "))
+				dst.WriteString("\n")
+			}
+
+			dashes := make([]string, len(colWidths))
+			for i, width := range colWidths {
+				dashes[i] = strings.Repeat("-", width)
+			}
+			dashLine := strings.Join(dashes, " ") + "\n"
+
+			var dst strings.Builder
+			writeRow(&dst, records[0])
+			dst.WriteString(dashLine)
+			for _, record := range records[1:] {
+				writeRow(&dst, record)
+			}
+			dst.WriteString(dashLine)
+
+			return TextFilterResponse{Output: strings.TrimSuffix(dst.String(), "\n") + endNL}, nil
+		},
+	},
 	"convert-yaml-to-json": {
 		Label: "Convert: YAML to JSON",
 		Filter: func(ctx context.Context, input string) (resp TextFilterResponse, err error) {