Implement password generation on new entries

main.go

@@ -35,7 +35,8 @@ func main() {
 					cli.EntryReaderShortcut(targetLocation, false)
 				case "shear":
 					offline.Shear(targetLocation)
-				case "gen": // TODO offline.Gen(targetLocation), exit after run
+				case "gen":
+					cli.AddEntry(targetLocation, true, 1)
 				case "copy":
 					cli.HelpCopy()
 				case "edit":
@@ -87,30 +88,40 @@ func main() {
 					switch args[3] {
 					case "password", "-p":
 						if argsCount == 4 {
-							cli.AddEntry(targetLocation, true, false)
+							cli.AddEntry(targetLocation, true, 0)
 						} else {
 							switch args[4] {
 							case "show", "-s":
-								cli.AddEntry(targetLocation, false, false)
+								cli.AddEntry(targetLocation, false, 0)
 							default:
-								cli.AddEntry(targetLocation, true, false)
+								cli.AddEntry(targetLocation, true, 0)
 							}
 						}
 					case "note", "-n":
-						cli.AddEntry(targetLocation, true, true)
+						cli.AddEntry(targetLocation, true, 2)
 					case "folder", "-f":
 						offline.AddFolder(targetLocation)
 					default:
 						cli.HelpAdd()
 					}
 				case "gen":
-					var field rune
-					field = field // TODO temporary to avoid unused variable error
-					switch args[3] {
-					case "update", "-u": // TODO offline.GenUpdate(targetLocation), exit after run
-					default:
-						cli.HelpGen()
+					if argsCount == 4 {
+						switch args[3] {
+						case "show", "-s":
+							cli.AddEntry(targetLocation, false, 1)
+						case "update", "-u": // TODO offline.GenUpdate(targetLocation), exit after run
+						default:
+							cli.HelpGen()
+						}
+					} else if args[3] == "update" || args[3] == "-u" {
+						switch args[4] {
+						case "show", "-s":
+							cli.AddEntry(targetLocation, false, 1)
+						default:
+							cli.AddEntry(targetLocation, true, 1)
+						}
 					}
+					cli.HelpGen()
 				default:
 					cli.HelpMain()
 				}

src/cli/add.go

@@ -7,7 +7,8 @@ import (
 )
 
 // AddEntry creates a new entry at targetLocation by taking user input via CLI prompts
-func AddEntry(targetLocation string, hidePassword bool, isNote bool) {
+// entryType: 0 = standard (password), 1 = auto-generated password, 2 = note
+func AddEntry(targetLocation string, hidePassword bool, entryType uint8) {
 	_, isAccessible := offline.TargetIsFile(targetLocation, false, 0)
 	if isAccessible {
 		fmt.Println(offline.AnsiError + "Target location already exists" + offline.AnsiReset)
@@ -16,9 +17,17 @@ func AddEntry(targetLocation string, hidePassword bool, isNote bool) {
 
 	var unencryptedEntry []string
 
-	if !isNote {
+	if entryType < 2 {
 		username := input("Username:")
-		password := inputHidden("Password:")
+
+		// determine whether to generate the password
+		var password string
+		if entryType == 0 {
+			password = inputHidden("Password:")
+		} else {
+			password = offline.StringGen(inputInt("Password length:"), inputBinary("Generate a complex (special characters) password?"), 0.2)
+		}
+
 		url := input("URL:")
 		if inputBinary("Add a note to this entry?") {
 			note := newNote()

src/cli/utilitiesMisc.go

@@ -12,9 +12,9 @@ import (
 // input prompts the user for input and returns the input as a string
 func input(prompt string) string {
 	fmt.Print("\n" + prompt + " ")
-	var input string
-	fmt.Scanln(&input)
-	return input
+	var userInput string
+	fmt.Scanln(&userInput)
+	return userInput
 }
 
 // inputHidden prompts the user for input and returns the input as a string, hiding the input from the terminal
@@ -26,6 +26,20 @@ func inputHidden(prompt string) string {
 	return password
 }
 
+// inputInt prompts the user for input and returns the input as an integer
+func inputInt(prompt string) int {
+
+	// loop until a valid integer is entered
+	for {
+		fmt.Print("\n" + prompt + " ")
+		var userInput int
+		_, err := fmt.Scanln(&userInput)
+		if err == nil {
+			return userInput
+		}
+	}
+}
+
 // inputBinary prompts the user with a yes/no question and returns the response as a boolean
 func inputBinary(prompt string) bool {
 	reader := bufio.NewReader(os.Stdin)

src/offline/utilitiesMisc.go

@@ -1,10 +1,14 @@
 package offline
 
 import (
+	"crypto/rand"
 	"fmt"
 	"io"
+	"math"
+	"math/big"
 	"os"
 	"os/exec"
+	"strings"
 )
 
 // TargetIsFile TargetStatusCheck checks if the targetLocation is a file, directory, or is inaccessible
@@ -63,3 +67,50 @@ func RemoveTrailingEmptyStrings(slice []string) []string {
 	}
 	return []string{}
 }
+
+// StringGen generates a random string of a specified length and complexity
+// complexity: minimum percentage of special characters to be returned in the generated string (only impacts complex strings)
+func StringGen(length int, complex bool, complexity float64) string {
+	var extendedCharset string // hold extended character set used for complex strings
+	var actualSpecialChars int // track the number of special characters in the generated string
+	var minSpecialChars int    // track the minimum number of special characters to accept
+
+	charset := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" // default character set used for all strings
+	if complex {
+		minSpecialChars = int(math.Round(float64(length) * complexity)) // determine minimum number of special characters to accept
+		extendedCharset = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"
+		charset = charset + extendedCharset
+	} else {
+		extendedCharset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	}
+
+	for {
+		// generate a random string
+		result := make([]byte, length)
+		for i := range result {
+			val, _ := rand.Int(rand.Reader, big.NewInt(int64(len(charset))))
+			result[i] = charset[val.Int64()]
+		}
+
+		// return early if the string is not complex
+		if !complex {
+			return string(result)
+		}
+
+		// count the number of special characters in the generated string
+		for _, char := range string(result) {
+			if strings.ContainsRune(extendedCharset, char) {
+				actualSpecialChars++
+			}
+		}
+
+		// return the generated string if it contains enough special characters
+		if actualSpecialChars >= minSpecialChars {
+			return string(result)
+		}
+
+		// reset special character counter
+		fmt.Println("Regenerating string until desired complexity is achieved...")
+		actualSpecialChars = 0
+	}
+}