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barcodes
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Add 2of5 and pdf417

This commit is contained in:
Fred Boniface 2023-09-01 22:14:11 +01:00
parent f1c8eb82b8
commit d236acb2d7
9 changed files with 146 additions and 64 deletions
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16
generation/2of5.go Normal file
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@ -0,0 +1,16 @@
package generation
import (
"fmt"
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/twooffive"
)
func generate2of5(parameters Parameters) (barcode.Barcode, error) {
barcode, err := twooffive.Encode(parameters.Content, false)
if err != nil {
fmt.Println("Error creating Barcode", err)
}
return barcode, err
}

16
generation/2of5interleaved.go Normal file
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@ -0,0 +1,16 @@
package generation
import (
"fmt"
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/twooffive"
)
func generate2of5Interleaved(parameters Parameters) (barcode.Barcode, error) {
barcode, err := twooffive.Encode(parameters.Content, true)
if err != nil {
fmt.Println("Error creating Barcode", err)
}
return barcode, err
}

4
generation/codabar.go
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@ -8,9 +8,9 @@ import (
)
func generateCodabar(parameters Parameters) (barcode.Barcode, error) {
codabar, err := codabar.Encode(parameters.Content)
codabarItem, err := codabar.Encode(parameters.Content)
if err != nil {
fmt.Println("Error creating Barcode", err)
}
return codabar, err
return codabarItem, err
}

6
generation/generate.go
View File

@ -23,6 +23,12 @@ func Generate(parameters Parameters) (barcode.Barcode, error) {
barcode_content, err = generateQr(parameters)
case Datamatrix:
barcode_content, err = generateDatamatrix(parameters)
case PDF417:
barcode_content, err = generatePDF417(parameters)
case TwoOfFiveInterleaved:
barcode_content, err = generate2of5Interleaved(parameters)
case TwoOfFive:
barcode_content, err = generate2of5(parameters)
default:
fmt.Println("Unsupported barcode type: ", parameters.Format)
}

28
generation/pdf417.go Normal file
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@ -0,0 +1,28 @@
package generation
import (
"fmt"
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/pdf417"
)
func generatePDF417(parameters Parameters) (barcode.Barcode, error) {
var level uint8
switch parameters.ECCLevel {
case 1:
level = byte(1)
case 2:
level = byte(3)
case 3:
level = byte(5)
case 4:
level = byte(8)
}
pdf417Code, err := pdf417.Encode(parameters.Content, level)
if err != nil {
fmt.Println("Error creating Barcode", err)
}
return pdf417Code, err
}

3
generation/types.go
View File

@ -9,6 +9,9 @@ const (
Code128 BarcodeType = "code128"
QR BarcodeType = "qr"
Datamatrix BarcodeType = "datamatrix"
PDF417 BarcodeType = "pdf417"
TwoOfFive BarcodeType = "2of5"
TwoOfFiveInterleaved BarcodeType = "2of5interleaved"
)
type ECCLevel int

7
validation/rules.go
View File

@ -14,6 +14,13 @@ type rule struct {
var formatRules = map[string]rule{
"2of5": {
minLength: 2,
maxLength: 80,
charset: *NUMERAL,
divisible: 1,
},
"2of5interleaved": {
minLength: 2,
maxLength: 80,
charset: *NUMERAL,

62
web/routeGenerate.go Normal file
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@ -0,0 +1,62 @@
package web
import (
"encoding/json"
"fmt"
"image"
"image/png"
"net/http"
"git.fjla.uk/fred.boniface/barcodes/generation"
"git.fjla.uk/fred.boniface/barcodes/validation"
"github.com/boombuler/barcode"
)
func generateBarcode(w http.ResponseWriter, r *http.Request) {
var req BarcodeRequest
err := json.NewDecoder(r.Body).Decode(&req)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
parameters := generation.Parameters{
Format: generation.BarcodeType(req.BarcodeType),
ECCLevel: generation.ECCLevel(req.ECCLevel),
Content: req.Content,
}
validate := validation.Validate(req.Content, req.BarcodeType)
if !validate {
fmt.Println("Validation Failed")
http.Error(w, "Validation Failed", http.StatusBadRequest)
return
}
barcodeGen, err := generation.Generate(parameters)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if barcodeGen == nil {
fmt.Println("Generation failed, no barcode created")
http.Error(w, "Barcode Generation Failed", http.StatusInternalServerError)
return
}
barcodeGen, _ = barcode.Scale(barcodeGen, int(req.Width), int(req.Height))
image, isImage := barcodeGen.(image.Image)
if !isImage {
fmt.Println("Generation failed - no image")
http.Error(w, "Generated Barcode is not an image", http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "image/png")
err = png.Encode(w, image)
if err != nil {
http.Error(w, "Error streaming barcode", http.StatusInternalServerError)
}
}

56
web/server.go
View File

@ -1,15 +1,8 @@
package web
import (
"encoding/json"
"fmt"
"image"
"image/png"
"net/http"
"git.fjla.uk/fred.boniface/barcodes/generation"
"git.fjla.uk/fred.boniface/barcodes/validation"
"github.com/boombuler/barcode"
)
func StartServer() {
@ -27,52 +20,3 @@ func StartServer() {
fmt.Println("Error: ", err)
}
}
func generateBarcode(w http.ResponseWriter, r *http.Request) {
var req BarcodeRequest
err := json.NewDecoder(r.Body).Decode(&req)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
parameters := generation.Parameters{
Format: generation.BarcodeType(req.BarcodeType),
ECCLevel: generation.ECCLevel(req.ECCLevel),
Content: req.Content,
}
validate := validation.Validate(req.Content, req.BarcodeType)
if !validate {
fmt.Println("Validation Failed")
http.Error(w, "Validation Failed", http.StatusBadRequest)
return
}
barcodeGen, err := generation.Generate(parameters)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if barcodeGen == nil {
fmt.Println("Generation failed, no barcode created")
http.Error(w, "Barcode Generation Failed", http.StatusInternalServerError)
return
}
barcodeGen, _ = barcode.Scale(barcodeGen, req.Width, req.Height)
image, isImage := barcodeGen.(image.Image)
if !isImage {
fmt.Println("Generation failed - no image")
http.Error(w, "Generated Barcode is not an image", http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "image/png")
err = png.Encode(w, image)
if err != nil {
http.Error(w, "Error streaming barcode", http.StatusInternalServerError)
}
}