Added basic code from https://github.com/status-im/image-resizer

Made some modifications to suit a general approach, more changes need to be applied

go.mod

@@ -43,8 +43,10 @@ require (
 	github.com/multiformats/go-multibase v0.0.1
 	github.com/multiformats/go-varint v0.0.5
 	github.com/mutecomm/go-sqlcipher v0.0.0-20190227152316-55dbde17881f
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
 	github.com/okzk/sdnotify v0.0.0-20180710141335-d9becc38acbd
 	github.com/olekukonko/tablewriter v0.0.2 // indirect
+	github.com/oliamb/cutter v0.2.2
 	github.com/onsi/ginkgo v1.10.3 // indirect
 	github.com/onsi/gomega v1.7.1 // indirect
 	github.com/pborman/uuid v1.2.0

go.sum

@@ -541,6 +541,8 @@ github.com/mutecomm/go-sqlcipher v0.0.0-20190227152316-55dbde17881f/go.mod h1:My
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/nakagami/firebirdsql v0.0.0-20190310045651-3c02a58cfed8/go.mod h1:86wM1zFnC6/uDBfZGNwB65O+pR2OFi5q/YQaEUid1qA=
 github.com/naoina/toml v0.0.0-20170918210437-9fafd6967416/go.mod h1:NBIhNtsFMo3G2szEBne+bO4gS192HuIYRqfvOWb4i1E=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
 github.com/nsf/termbox-go v0.0.0-20170211012700-3540b76b9c77/go.mod h1:IuKpRQcYE1Tfu+oAQqaLisqDeXgjyyltCfsaoYN18NQ=
 github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
 github.com/okzk/sdnotify v0.0.0-20180710141335-d9becc38acbd h1:+iAPaTbi1gZpcpDwe/BW1fx7Xoesv69hLNGPheoyhBs=
@@ -551,6 +553,8 @@ github.com/olekukonko/tablewriter v0.0.1 h1:b3iUnf1v+ppJiOfNX4yxxqfWKMQPZR5yoh8u
 github.com/olekukonko/tablewriter v0.0.1/go.mod h1:vsDQFd/mU46D+Z4whnwzcISnGGzXWMclvtLoiIKAKIo=
 github.com/olekukonko/tablewriter v0.0.2 h1:sq53g+DWf0J6/ceFUHpQ0nAEb6WgM++fq16MZ91cS6o=
 github.com/olekukonko/tablewriter v0.0.2/go.mod h1:rSAaSIOAGT9odnlyGlUfAJaoc5w2fSBUmeGDbRWPxyQ=
+github.com/oliamb/cutter v0.2.2 h1:Lfwkya0HHNU1YLnGv2hTkzHfasrSMkgv4Dn+5rmlk3k=
+github.com/oliamb/cutter v0.2.2/go.mod h1:4BenG2/4GuRBDbVm/OPahDVqbrOemzpPiG5mi1iryBU=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.8.0 h1:VkHVNpR4iVnU8XQR6DBm8BqYjN7CRzw+xKUbVVbbW9w=

images/consts.go

@@ -0,0 +1,3 @@
+package images
+
+const ImageDir = "assets/"

images/files.go

@@ -0,0 +1,40 @@
+package images
+
+import (
+	"image"
+	"image/jpeg"
+	"os"
+)
+
+func Get(fileName string) (image.Image, error) {
+	file, err := os.Open(fileName)
+	if err != nil {
+		return nil, err
+	}
+
+	img, err := jpeg.Decode(file)
+	if err != nil {
+		return nil, err
+	}
+	file.Close()
+
+	return img, nil
+}
+
+func Render(img image.Image, imgDetail *Details) error {
+	out, err := os.Create(imgDetail.FileName)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	o := new(jpeg.Options)
+	o.Quality = imgDetail.Quality
+
+	jpeg.Encode(out, img, o)
+
+	fi, _ := out.Stat()
+	imgDetail.SizeFile = fi.Size()
+
+	return nil
+}

images/main.go

@@ -0,0 +1 @@
+package images

images/manipulation.go

@@ -0,0 +1,20 @@
+package images
+
+import (
+	"image"
+
+	"github.com/nfnt/resize"
+	"github.com/oliamb/cutter"
+)
+
+func ResizeSquare(size uint, img image.Image) image.Image {
+	return resize.Resize(size, 0, img, resize.Bilinear)
+}
+
+func CropSquare(img image.Image, size int, anchor image.Point) (image.Image, error) {
+	return cutter.Crop(img, cutter.Config{
+		Width:  size,
+		Height: size,
+		Anchor: anchor,
+	})
+}

images/meta.go

@@ -0,0 +1,45 @@
+package images
+
+import (
+	"fmt"
+	"strings"
+)
+
+const (
+	// Raster image types
+	JPEG FileType = 1 + iota
+	PNG
+	GIF
+	WEBP
+
+	// Vector image types
+	SVG
+	AI
+)
+
+type Details struct {
+	SizePixel  uint
+	SizeFile   int64
+	Quality    int
+	FileName   string
+	FileType   FileType
+	Properties string
+}
+
+type FileType uint
+
+func MakeDetails(imageName string, size uint, quality int, properties string) Details {
+	return Details{
+		SizePixel:  size,
+		Quality:    quality,
+		Properties: properties,
+		FileName:   makeOutputName(imageName, size, quality, properties),
+	}
+}
+
+func makeOutputName(imageName string, size uint, i int, properties string) string {
+	if properties != "" {
+		properties = "_" + strings.ReplaceAll(properties, " ", "-")
+	}
+	return fmt.Sprintf(ImageDir+"%s_s-%d_q-%d%s.jpg", imageName, size, i, properties)
+}

images/meta_test.go

@@ -0,0 +1,12 @@
+package images
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestFileTypes(t *testing.T) {
+	fmt.Printf("%d\n", WEBP)
+	fmt.Printf("%d\n", SVG)
+	fmt.Printf("%d\n", AI)
+}