mirror of
https://github.com/rwinkhart/go-boilerplate.git
synced 2026-08-28 04:46:41 -04:00
Compare commits
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10ee4f91fc |
@@ -1,6 +1,6 @@
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MIT License
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Copyright (c) 2025 Randall Winkhart
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Copyright (c) 2025-2026 Randall Winkhart
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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@@ -7,6 +7,9 @@ var Home, _ = os.UserHomeDir()
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const (
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AnsiBold = "\033[1m"
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AnsiError = "\033[38;5;9m"
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AnsiWarning = "\033[38;5;3m"
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AnsiBlue = "\033[38;5;4m"
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AnsiGreen = "\033[38;5;2m"
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AnsiReset = "\033[0m"
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ErrorRead = 101
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+6
-5
@@ -11,7 +11,7 @@ import (
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// Input prompts the user for input and returns the input as a string.
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func Input(prompt string) string {
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fmt.Print("\n" + prompt + " ")
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fmt.Print(prompt + " ")
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reader := bufio.NewReader(os.Stdin)
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userInput, _ := reader.ReadString('\n')
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return strings.TrimRight(userInput, "\n\r ") // remove trailing newlines, carriage returns, and spaces
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@@ -19,7 +19,7 @@ func Input(prompt string) string {
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// InputHidden prompts the user for input and returns the input as a byte array, hiding the input from the terminal.
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func InputHidden(prompt string) []byte {
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fmt.Print("\n" + prompt + " ")
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fmt.Print(prompt + " ")
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byteInput, _ := term.ReadPassword(int(os.Stdin.Fd()))
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fmt.Println()
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return byteInput
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@@ -28,7 +28,7 @@ func InputHidden(prompt string) []byte {
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// InputBinary prompts the user with a yes/no question and returns the response as a boolean.
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func InputBinary(prompt string) bool {
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reader := bufio.NewReader(os.Stdin)
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fmt.Print("\n" + prompt + " (y/N) ")
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fmt.Print(prompt + " (y/N) ")
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char, _, _ := reader.ReadRune()
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if char == 'y' || char == 'Y' {
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return true
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@@ -40,12 +40,13 @@ func InputBinary(prompt string) bool {
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// A negative min/max value will disable the respective limit.
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func InputInt(prompt string, min, max int) int {
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for {
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fmt.Print("\n" + prompt + " ")
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fmt.Print(prompt + " ")
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var userInput int
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_, err := fmt.Scanln(&userInput)
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if err == nil && (userInput >= min || min < 0) && (userInput <= max || max < 0) {
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return userInput
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}
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fmt.Println()
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}
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}
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@@ -54,5 +55,5 @@ func InputMenuGen(prompt string, options []string) int {
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for i, option := range options {
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fmt.Printf("%d. %s\n", i+1, option)
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}
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return InputInt(prompt, 1, len(options))
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return InputInt("\n"+prompt, 1, len(options))
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}
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@@ -1,7 +1,7 @@
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module github.com/rwinkhart/go-boilerplate
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go 1.24.3
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go 1.25.5
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require golang.org/x/term v0.32.0
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require golang.org/x/term v0.38.0
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require golang.org/x/sys v0.33.0 // indirect
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require golang.org/x/sys v0.39.0 // indirect
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@@ -1,4 +1,4 @@
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golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
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golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
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golang.org/x/term v0.32.0 h1:DR4lr0TjUs3epypdhTOkMmuF5CDFJ/8pOnbzMZPQ7bg=
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golang.org/x/term v0.32.0/go.mod h1:uZG1FhGx848Sqfsq4/DlJr3xGGsYMu/L5GW4abiaEPQ=
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golang.org/x/sys v0.39.0 h1:CvCKL8MeisomCi6qNZ+wbb0DN9E5AATixKsvNtMoMFk=
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golang.org/x/sys v0.39.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
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golang.org/x/term v0.38.0 h1:PQ5pkm/rLO6HnxFR7N2lJHOZX6Kez5Y1gDSJla6jo7Q=
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golang.org/x/term v0.38.0/go.mod h1:bSEAKrOT1W+VSu9TSCMtoGEOUcKxOKgl3LE5QEF/xVg=
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@@ -0,0 +1,67 @@
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package stringy
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import (
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"crypto/rand"
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"fmt"
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"math"
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"math/big"
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"strings"
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)
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// StringGen generates a random string of a specified length and complexity.
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// Requires: complexity (minimum percentage of special characters to be returned in the generated string; set to 0 to generate a simple string),
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// complexCharsetLevel (1 = safe for filenames, 2 = safe for most password entries, 3 = safe only for well-made password entries)
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func StringGen(length int, complexity float64, complexCharsetLevel uint8) string {
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var actualSpecialChars int // track the number of special characters in the generated string
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var minSpecialChars int // track the minimum number of special characters to accept
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var extendedCharset string // additions to character set used for complex strings
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charset := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" // default character set used for all strings
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const extendedCharsetFiles = "!#$%&+,-.;=@_~^()[]{}`'" // additional special characters for complex strings (safe in file names)
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const extendedCharsetMostPassword = "*:><?|" // additional special characters for complex strings (NOT safe in file names)
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const extendedCharsetSpecialPassword = "\"/\\" // additional special characters for complex strings (NOT safe in file names)
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if complexity > 0 {
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minSpecialChars = int(math.Round(float64(length) * complexity)) // determine minimum number of special characters to accept
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switch complexCharsetLevel {
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case 1:
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extendedCharset = extendedCharsetFiles
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case 2:
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extendedCharset = extendedCharsetMostPassword + extendedCharsetFiles[:len(extendedCharsetFiles)-9]
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case 3:
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extendedCharset = extendedCharsetFiles + extendedCharsetMostPassword + extendedCharsetSpecialPassword
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}
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charset += extendedCharset
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}
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// loop until a string of the desired complexity is generated
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for {
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// generate a random string
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result := make([]byte, length)
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for i := range result {
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val, _ := rand.Int(rand.Reader, big.NewInt(int64(len(charset))))
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result[i] = charset[val.Int64()]
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}
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// return early if the string is not complex
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if complexity <= 0 {
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return string(result)
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}
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// count the number of special characters in the generated string
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for _, char := range string(result) {
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if strings.ContainsRune(extendedCharset, char) {
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actualSpecialChars++
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}
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}
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// return the generated string if it contains enough special characters
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if actualSpecialChars >= minSpecialChars {
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return string(result)
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}
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// reset special character counter
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fmt.Println("Regenerating string until desired complexity is achieved...")
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actualSpecialChars = 0
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}
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}
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