Add replaceCommands to avoid index suicide

processor/regex.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log"
 	"regexp"
+	"sort"
 	"strconv"
 	"strings"
 
@@ -71,6 +72,11 @@ type NamedCapture struct {
 	Value string
 	Range [2]int
 }
+type ReplaceCommand struct {
+	From     int
+	To       int
+	With     string
+}
 
 // ProcessContent applies regex replacement with Lua processing
 func (p *RegexProcessor) ProcessContent(content string, pattern string, luaExpr string) (string, int, int, error) {
@@ -249,6 +255,7 @@ func (p *RegexProcessor) ProcessContent(content string, pattern string, luaExpr
 			replacement = replacementVar.String()
 		}
 		if replacement == "" {
+			commands := make([]ReplaceCommand, 0, len(modsMap))
 			// Apply the modifications to the original match
 			replacement = match
 			for i := len(modsMap) - 1; i >= 0; i-- {
@@ -258,7 +265,14 @@ func (p *RegexProcessor) ProcessContent(content string, pattern string, luaExpr
 				// To relate them to match we have to subtract the match start index
 				groupStart := groups[i*2] - matchIndices[0]
 				groupEnd := groups[i*2+1] - matchIndices[0]
-				replacement = replacement[:groupStart] + newVal + replacement[groupEnd:]
+				// replacement = replacement[:groupStart] + newVal + replacement[groupEnd:]
+				log.Printf("%#v", groupStart)
+				log.Printf("%#v", groupEnd)
+				// commands = append(commands, ReplaceCommand{
+				// 	From:     groupStart,
+				// 	To:       groupEnd,
+				// 	With:     newVal,
+				// })
 			}
 
 			for i := len(namedCaptures) - 1; i >= 0; i-- {
@@ -269,7 +283,20 @@ func (p *RegexProcessor) ProcessContent(content string, pattern string, luaExpr
 				groupStart := capture.Range[0] - matchIndices[0]
 				groupEnd := capture.Range[1] - matchIndices[0]
 				luaValue := L.GetGlobal(capture.Name).String()
-				replacement = replacement[:groupStart] + luaValue + replacement[groupEnd:]
+				// replacement = replacement[:groupStart] + luaValue + replacement[groupEnd:]
+				commands = append(commands, ReplaceCommand{
+					From:     groupStart,
+					To:       groupEnd,
+					With:     luaValue,
+				})
+			}
+
+			sort.Slice(commands, func(i, j int) bool {
+				return commands[i].From > commands[j].From
+			})
+			
+			for _, command := range commands {
+				replacement = replacement[:command.From] + command.With + replacement[command.To:]
 			}
 		}
 		modificationCount++