Add Lines: Sort A-Z, Sort Z-A, and Unique processors

Co-authored-by: Shelley <shelley@exe.dev>

textfilters.go

@@ -8,6 +8,7 @@ import (
 	"errors"
 	"fmt"
 	"regexp"
+	"sort"
 	"strconv"
 	"strings"
 
@@ -280,6 +281,41 @@ var TextFilters = map[string]TextProcessor{
 		},
 	},
 
+	"sort-lines-asc": {
+		Label: "Lines: Sort A-Z",
+		Filter: func(ctx context.Context, input string) (resp TextFilterResponse, err error) {
+			lines := strings.Split(input, "\n")
+			sort.Strings(lines)
+			return TextFilterResponse{Output: strings.Join(lines, "\n")}, nil
+		},
+	},
+
+	"sort-lines-desc": {
+		Label: "Lines: Sort Z-A",
+		Filter: func(ctx context.Context, input string) (resp TextFilterResponse, err error) {
+			lines := strings.Split(input, "\n")
+			sort.Sort(sort.Reverse(sort.StringSlice(lines)))
+			return TextFilterResponse{Output: strings.Join(lines, "\n")}, nil
+		},
+	},
+
+	"unique-lines": {
+		Label: "Lines: Unique",
+		Filter: func(ctx context.Context, input string) (resp TextFilterResponse, err error) {
+			lines := strings.Split(input, "\n")
+			seen := make(map[string]struct{}, len(lines))
+			dst := make([]string, 0, len(lines))
+			for _, line := range lines {
+				if _, ok := seen[line]; ok {
+					continue
+				}
+				seen[line] = struct{}{}
+				dst = append(dst, line)
+			}
+			return TextFilterResponse{Output: strings.Join(dst, "\n")}, nil
+		},
+	},
+
 	"remove-blank-lines": {
 		Label: "Lines: Remove Blank Lines",
 		Filter: func(ctx context.Context, input string) (resp TextFilterResponse, err error) {