Moved to concord

Bumps [golang.org/x/image](https://github.com/golang/image) from 0.1.0 to 0.5.0.
- [Release notes](https://github.com/golang/image/releases)
- [Commits](https://github.com/golang/image/compare/v0.1.0...v0.5.0)

---
updated-dependencies:
- dependency-name: golang.org/x/image
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/go.yml

@@ -1,24 +0,0 @@
-name: CI
-on: [push, pull_request]
-jobs:
-  build:
-    name: Build
-    runs-on: ubuntu-latest
-    steps:
-    - name: Set up Golang
-      uses: actions/setup-go@v2
-      with:
-        go-version: '^1.16.0'
-    - run: go version
-
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
-
-    - name: install dependencies
-      run: go mod download
-
-    - name: run test
-      run: go test -race -coverprofile=coverage.txt -covermode=atomic
-    
-    - name: upload coverage
-      run: bash <(curl -s https://codecov.io/bash)

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 - 2021 Weilin Shi
+Copyright (c) 2017 - 2024 Weilin Shi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -2,19 +2,17 @@
 
 <div>
 
-[![PkgGoDev](https://pkg.go.dev/badge/github.com/steambap/captcha)](https://pkg.go.dev/github.com/steambap/captcha)
-[![Build Status](https://github.com/steambap/captcha/workflows/CI/badge.svg)](https://github.com/steambap/captcha/actions?workflow=CI)
-[![codecov](https://codecov.io/gh/steambap/captcha/branch/main/graph/badge.svg)](https://codecov.io/gh/steambap/captcha)
-[![Go Report Card](https://goreportcard.com/badge/github.com/steambap/captcha)](https://goreportcard.com/report/github.com/steambap/captcha)
+[![PkgGoDev](https://pkg.go.dev/badge/concord.hectabit.org/HectaBit/captcha)](https://pkg.go.dev/concord.hectabit.org/HectaBit/captcha)
+[![Go Report Card](https://goreportcard.com/badge/concord.hectabit.org/HectaBit/captcha)](https://goreportcard.com/report/concord.hectabit.org/HectaBit/captcha)
 
 </div>
 
 ## Why another captcha generator?
-I want a simple and framework-independent way to generate captcha. It also should be flexible, at least allow me to pick my favorite font.
+Because I can. 
 
 ## install
 ```
-go get github.com/steambap/captcha
+go get concord.hectabit.org/HectaBit/captcha
 ```
 
 ## usage
@@ -32,8 +30,9 @@ func handle(w http.ResponseWriter, r *http.Request) {
 
 ```
 
-[documentation](https://pkg.go.dev/github.com/steambap/captcha) |
-[example](example/basic/main.go)
+[documentation](https://pkg.go.dev/concord.hectabit.org/HectaBit/captcha) |
+[example](example/basic/main.go) |
+[font example](example/load-font/main.go)
 
 ## sample image
 ![image](example/captcha.png)
@@ -42,7 +41,7 @@ func handle(w http.ResponseWriter, r *http.Request) {
 
 ## Compatibility
 
-This package uses embed package from Go 1.16. If for some reason you have to use pre 1.16 version of Go, reference pre 1.4 version of this module in your go.mod.
+This package uses embed package from Go 1.16. If for some reasons you have to use pre 1.16 version of Go, reference pre 1.4 version of this module in your go.mod.
 
 ## Contributing
 If your found a bug, please contribute!

captcha.go

@@ -2,8 +2,7 @@
 package captcha
 
 import (
-	"bytes"
-	_ "embed"
+	_ "embed" // embed font
 	"image"
 	"image/color"
 	"image/draw"
@@ -63,7 +62,7 @@ func newDefaultOption(width, height int) *Options {
 	return &Options{
 		BackgroundColor: color.Transparent,
 		CharPreset:      charPreset,
-		TextLength:      4,
+		TextLength:      6,
 		CurveNumber:     2,
 		FontDPI:         72.0,
 		FontScale:       1.0,
@@ -119,12 +118,12 @@ func LoadFont(fontData []byte) error {
 
 // LoadFontFromReader load an external font from an io.Reader interface.
 func LoadFontFromReader(reader io.Reader) error {
-	var buf bytes.Buffer
-	if _, err := io.Copy(&buf, reader); err != nil {
+	b, err := io.ReadAll(reader)
+	if err != nil {
 		return err
 	}
 
-	return LoadFont(buf.Bytes())
+	return LoadFont(b)
 }
 
 // New creates a new captcha.
@@ -137,11 +136,7 @@ func New(width int, height int, option ...SetOption) (*Data, error) {
 
 	text := randomText(options)
 	img := image.NewNRGBA(image.Rect(0, 0, width, height))
-	draw.Draw(img, img.Bounds(), &image.Uniform{options.BackgroundColor}, image.Point{}, draw.Src)
-	drawNoise(img, options)
-	drawCurves(img, options)
-	err := drawText(text, img, options)
-	if err != nil {
+	if err := drawWithOption(text, img, options); err != nil {
 		return nil, err
 	}
 
@@ -158,21 +153,42 @@ func NewMathExpr(width int, height int, option ...SetOption) (*Data, error) {
 
 	text, equation := randomEquation()
 	img := image.NewNRGBA(image.Rect(0, 0, width, height))
-	draw.Draw(img, img.Bounds(), &image.Uniform{options.BackgroundColor}, image.Point{}, draw.Src)
-	drawNoise(img, options)
-	drawCurves(img, options)
-	err := drawText(equation, img, options)
-	if err != nil {
+	if err := drawWithOption(equation, img, options); err != nil {
 		return nil, err
 	}
 
 	return &Data{Text: text, img: img}, nil
 }
 
+// NewCustomGenerator creates a new captcha based on a custom text generator.
+func NewCustomGenerator(
+	width int, height int, generator func() (anwser string, question string), option ...SetOption,
+) (*Data, error) {
+	options := newDefaultOption(width, height)
+	for _, setOption := range option {
+		setOption(options)
+	}
+
+	answer, question := generator()
+	img := image.NewNRGBA(image.Rect(0, 0, width, height))
+	if err := drawWithOption(question, img, options); err != nil {
+		return nil, err
+	}
+
+	return &Data{Text: answer, img: img}, nil
+}
+
+func drawWithOption(text string, img *image.NRGBA, options *Options) error {
+	draw.Draw(img, img.Bounds(), &image.Uniform{options.BackgroundColor}, image.Point{}, draw.Src)
+	drawNoise(img, options)
+	drawCurves(img, options)
+	return drawText(text, img, options)
+}
+
 func randomText(opts *Options) (text string) {
-	n := len(opts.CharPreset)
+	n := len([]rune(opts.CharPreset))
 	for i := 0; i < opts.TextLength; i++ {
-		text += string(opts.CharPreset[rand.Intn(n)])
+		text += string([]rune(opts.CharPreset)[rand.Intn(n)])
 	}
 
 	return text

captcha_test.go

@@ -69,6 +69,12 @@ func TestNewCaptchaOptions(t *testing.T) {
 	NewMathExpr(100, 34, func(options *Options) {
 		options.BackgroundColor = color.Black
 	})
+
+	NewCustomGenerator(100, 34, func() (anwser string, question string) {
+		return "4", "2x2?"
+	}, func(o *Options) {
+		o.BackgroundColor = color.Black
+	})
 }
 
 func TestNewMathExpr(t *testing.T) {
@@ -78,6 +84,15 @@ func TestNewMathExpr(t *testing.T) {
 	}
 }
 
+func TestNewCustomGenerator(t *testing.T) {
+	_, err := NewCustomGenerator(150, 50, func() (anwser string, question string) {
+		return "1", "2"
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
 func TestNilFontError(t *testing.T) {
 	temp := ttfFont
 	ttfFont = nil
@@ -92,6 +107,13 @@ func TestNilFontError(t *testing.T) {
 		t.Fatal("Expect to get nil font error")
 	}
 
+	_, err = NewCustomGenerator(150, 50, func() (anwser string, question string) {
+		return "1", "2"
+	})
+	if err == nil {
+		t.Fatal("Expect to get nil font error")
+	}
+
 	ttfFont = temp
 }
 

code-of-conduct.md

@@ -1 +1 @@
-[https://contributor-covenant.org/version/1/4/](https://contributor-covenant.org/version/1/4/)
+[https://www.contributor-covenant.org/version/2/1/code_of_conduct/](https://www.contributor-covenant.org/version/2/1/code_of_conduct/)

example/basic/go.mod

@@ -1,7 +1,7 @@
-module github.com/steambap/captcha/example/basic
+module concord.hectabit.org/HectaBit/captcha/example/basic
 
 go 1.12
 
-replace github.com/steambap/captcha => ../../
+replace concord.hectabit.org/HectaBit/captcha => ../../
 
-require github.com/steambap/captcha v0.0.0-00010101000000-000000000000
+require concord.hectabit.org/HectaBit/captcha v0.0.0-00010101000000-000000000000

go.mod

@@ -1,8 +1,8 @@
-module github.com/steambap/captcha
+module concord.hectabit.org/HectaBit/captcha
 
-go 1.16
+go 1.20
 
 require (
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
-	golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d
+	golang.org/x/image v0.15.0
 )

go.sum

@@ -1,6 +1,4 @@
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
-golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d h1:RNPAfi2nHY7C2srAV8A49jpsYr0ADedCk1wq6fTMTvs=
-golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/image v0.15.0 h1:kOELfmgrmJlw4Cdb7g/QGuB3CvDrXbqEIww/pNtNBm8=
+golang.org/x/image v0.15.0/go.mod h1:HUYqC05R2ZcZ3ejNQsIHQDQiwWM4JBqmm6MKANTp4LE=