interactive mode

main.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"os"
 	"sort"
+	"strings"
 	"sync"
 )
 
@@ -334,28 +335,91 @@ func main() {
 	regexModePtr := flag.Bool("ex", false, "set if using g2eb expressions, leave for full string matching")
 	noHighlightPtr := flag.Bool("noh", false, "no hightlght")
 	filePtr := flag.String("f", "", "specify a file path to read file instead of stdin")
+	interactivePtr := flag.Bool("it", false, "Interactive mode - ignores all other flags")
 
 	flag.Parse()
 
-	pattern := flag.Args()[0]
-	var in *os.File
-	if *filePtr != "" {
-		f, err := os.Open(*filePtr)
-		if err != nil {
-			_ = fmt.Errorf("Could not open file %s", *filePtr)
-			os.Exit(-1)
-		}
-		in = f
-	} else {
-		in = os.Stdin
-	}
-	m := processReader(in, pattern, *regexModePtr)
+	if *interactivePtr {
+		currentMode := false // false - full match, true - exp
+		m := "full match"
+		var currentPattern string
+		var in *os.File
+		var filename string
+		running := true
+		reader := bufio.NewReader(os.Stdin)
+		for running {
+			fmt.Print(">>> ")
+			line, _ := reader.ReadString('\n') // read until newline (or EOF)
+			args := strings.Fields(line)
+			fmt.Println(args)
+			if len(args) == 0 {
+				continue
+			}
+			switch args[0] {
+			case "exit":
+				running = false
+			case "mode":
+				currentMode = !currentMode
+				if currentMode {
+					m = "expression match"
+				} else {
+					m = "full match"
+				}
+				fmt.Printf("Current mode: %s\n", m)
+			case "pattern":
+				currentPattern = args[1]
+				fmt.Printf("Current pattern: %s\n", currentPattern)
+			case "file":
+				filename = args[1]
+				a, err := os.Open(args[1])
+				if err != nil {
+					fmt.Printf("Could not open file %s\n", args[1])
+				}
+				defer a.Close()
+				in = a
+				fmt.Println("Successfully opened file")
+			case "run":
+				m := processReader(in, currentPattern, currentMode)
 
-	for _, lm := range m {
-		if *noHighlightPtr {
-			fmt.Println(lm.Line)
+				for _, lm := range m {
+					if *noHighlightPtr {
+						fmt.Println(lm.Line)
+					} else {
+						fmt.Println(highlight(lm.Line, lm.Start, lm.End, green))
+					}
+				}
+			case "help":
+				fmt.Printf("Mode: %s, Pattern: %s, File: %s\n\n", m, currentPattern, filename)
+				fmt.Println("mode - toggles expression mode")
+				fmt.Println("pattern <pattern> - sets pattern")
+				fmt.Println("file <filename> - sets file")
+				fmt.Println("run - runs the search")
+				fmt.Println("exit")
+			default:
+			}
+		}
+	} else {
+		pattern := flag.Args()[0]
+		var in *os.File
+		if *filePtr != "" {
+			f, err := os.Open(*filePtr)
+			if err != nil {
+				_ = fmt.Errorf("Could not open file %s", *filePtr)
+				os.Exit(-1)
+			}
+			defer f.Close()
+			in = f
 		} else {
-			fmt.Println(highlight(lm.Line, lm.Start, lm.End, green))
+			in = os.Stdin
+		}
+		m := processReader(in, pattern, *regexModePtr)
+
+		for _, lm := range m {
+			if *noHighlightPtr {
+				fmt.Println(lm.Line)
+			} else {
+				fmt.Println(highlight(lm.Line, lm.Start, lm.End, green))
+			}
 		}
 	}
 }