code update

.gitignore

@@ -0,0 +1,2 @@
+# Ignore any generated xlsx documents
+*.xlsx

go.mod

@@ -2,7 +2,21 @@ module json2excel
 
 go 1.19
 
-require github.com/iancoleman/orderedmap v0.2.0
+require (
+	github.com/iancoleman/orderedmap v0.2.0
+	github.com/xuri/excelize/v2 v2.7.0
+)
+
+require (
+	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 // indirect
+	github.com/richardlehane/mscfb v1.0.4 // indirect
+	github.com/richardlehane/msoleps v1.0.3 // indirect
+	github.com/xuri/efp v0.0.0-20220603152613-6918739fd470 // indirect
+	github.com/xuri/nfp v0.0.0-20220409054826-5e722a1d9e22 // indirect
+	golang.org/x/crypto v0.5.0 // indirect
+	golang.org/x/net v0.5.0 // indirect
+	golang.org/x/text v0.6.0 // indirect
+)
 
 //require internal/ordered v1.0.0
 

go.sum

@@ -1,2 +1,62 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/iancoleman/orderedmap v0.2.0 h1:sq1N/TFpYH++aViPcaKjys3bDClUEU7s5B+z6jq8pNA=
 github.com/iancoleman/orderedmap v0.2.0/go.mod h1:N0Wam8K1arqPXNWjMo21EXnBPOPp36vB07FNRdD2geA=
+github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 h1:RWengNIwukTxcDr9M+97sNutRR1RKhG96O6jWumTTnw=
+github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826/go.mod h1:TaXosZuwdSHYgviHp1DAtfrULt5eUgsSMsZf+YrPgl8=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/richardlehane/mscfb v1.0.4 h1:WULscsljNPConisD5hR0+OyZjwK46Pfyr6mPu5ZawpM=
+github.com/richardlehane/mscfb v1.0.4/go.mod h1:YzVpcZg9czvAuhk9T+a3avCpcFPMUWm7gK3DypaEsUk=
+github.com/richardlehane/msoleps v1.0.1/go.mod h1:BWev5JBpU9Ko2WAgmZEuiz4/u3ZYTKbjLycmwiWUfWg=
+github.com/richardlehane/msoleps v1.0.3 h1:aznSZzrwYRl3rLKRT3gUk9am7T/mLNSnJINvN0AQoVM=
+github.com/richardlehane/msoleps v1.0.3/go.mod h1:BWev5JBpU9Ko2WAgmZEuiz4/u3ZYTKbjLycmwiWUfWg=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/xuri/efp v0.0.0-20220603152613-6918739fd470 h1:6932x8ltq1w4utjmfMPVj09jdMlkY0aiA6+Skbtl3/c=
+github.com/xuri/efp v0.0.0-20220603152613-6918739fd470/go.mod h1:ybY/Jr0T0GTCnYjKqmdwxyxn2BQf2RcQIIvex5QldPI=
+github.com/xuri/excelize/v2 v2.7.0 h1:Hri/czwyRCW6f6zrCDWXcXKshlq4xAZNpNOpdfnFhEw=
+github.com/xuri/excelize/v2 v2.7.0/go.mod h1:ebKlRoS+rGyLMyUx3ErBECXs/HNYqyj+PbkkKRK5vSI=
+github.com/xuri/nfp v0.0.0-20220409054826-5e722a1d9e22 h1:OAmKAfT06//esDdpi/DZ8Qsdt4+M5+ltca05dA5bG2M=
+github.com/xuri/nfp v0.0.0-20220409054826-5e722a1d9e22/go.mod h1:WwHg+CVyzlv/TX9xqBFXEZAuxOPxn2k1GNHwG41IIUQ=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.5.0 h1:U/0M97KRkSFvyD/3FSmdP5W5swImpNgle/EHFhOsQPE=
+golang.org/x/crypto v0.5.0/go.mod h1:NK/OQwhpMQP3MwtdjgLlYHnH9ebylxKWv3e0fK+mkQU=
+golang.org/x/image v0.0.0-20220902085622-e7cb96979f69 h1:Lj6HJGCSn5AjxRAH2+r35Mir4icalbqku+CLUtjnvXY=
+golang.org/x/image v0.0.0-20220902085622-e7cb96979f69/go.mod h1:doUCurBvlfPMKfmIpRIywoHmhN3VyhnoFDbvIEWF4hY=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.5.0 h1:GyT4nK/YDHSqa1c4753ouYCDajOYKTja9Xb/OHtgvSw=
+golang.org/x/net v0.5.0/go.mod h1:DivGGAXEgPSlEBzxGzZI+ZLohi+xUj054jfeKui00ws=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.4.0/go.mod h1:9P2UbLfCdcvo3p/nzKvsmas4TnlujnuoV9hGgYzW1lQ=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.6.0 h1:3XmdazWV+ubf7QgHSTWeykHOci5oeekaGJBLkrkaw4k=
+golang.org/x/text v0.6.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -3,28 +3,98 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"log"
+	"os"
 
 	"github.com/iancoleman/orderedmap"
+	"github.com/xuri/excelize/v2"
 )
 
 // Initial concept from https://stackoverflow.com/q/68621039
 
 func main() {
+	jsonFile := "test.json"
 	parentNode := "input"
-	s, err := ioutil.ReadFile("test.json")
+	sheetName := "Sheet2"
-	if err != nil {
+	outputFilename := "test.xlsx"
-		panic(err)
+
+	var xlsx *excelize.File
+	var s []byte
+
+	var sheetIndex int
+	var err error
+
+	var cell string
+	var row, column int
+
+	// TODO - truncate sheetName to the maximum 31 characters
+
+	// Check if xlsx file exists already, and if it does then open and append data
+	if fileExists(outputFilename) {
+		fmt.Printf("Output spreadsheet '%s' already exists.\n", outputFilename)
+		xlsx, err = excelize.OpenFile(outputFilename)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+
+		// Since we have an existing workbook, check if the sheet we want to write to already exists
+		sheetFound := false
+		for index, name := range xlsx.GetSheetMap() {
+			if name == sheetName {
+				fmt.Printf("Found worksheet '%s' at index '%d'\n", sheetName, index)
+				sheetFound = true
+			}
+		}
+		if !sheetFound {
+			// Create the sheet
+			fmt.Printf("Creating worksheet '%s'\n", sheetName)
+			sheetIndex, err = xlsx.NewSheet(sheetName)
+			if err != nil {
+				fmt.Printf("Error creating worksheet '%s' : %s\n", sheetName, err)
+			}
+			// Set active worksheet
+			fmt.Printf("Setting active sheet to index %d", sheetIndex)
+			xlsx.SetActiveSheet(sheetIndex)
+		}
+
+	} else {
+		fmt.Printf("Creating output spreadsheet '%s'\n", outputFilename)
+		// Create the file
+		xlsx = excelize.NewFile()
+
+		// Rename the default Sheet1 to this worksheet name
+		if sheetName != "Sheet1" {
+			fmt.Printf("Renaming default worksheet to '%s'\n", sheetName)
+			err = xlsx.SetSheetName("Sheet1", sheetName)
+			if err != nil {
+				fmt.Printf("Error setting sheet name to '%s': %s\n", sheetName, err)
+			}
+		}
 	}
 
-	//TestUnmarshalJSON()
+	// Read the json input file
+	if fileExists(jsonFile) {
+		s, err = os.ReadFile(jsonFile)
+		if err != nil {
+			panic(err)
+		}
+	} else {
+		fmt.Printf("Input JSON file '%s' does not exist.\n", jsonFile)
+	}
 
+	// Read the json into an orderedmap to preserve the ordering of json structure
 	o := orderedmap.New()
 	err = json.Unmarshal([]byte(s), &o)
 	if err != nil {
-		fmt.Printf("JSON Unmarshal error", err)
+		fmt.Printf("JSON Unmarshal error %s\n", err)
 	}
 
+	// Assume that our content is within the first top-level key
+	topLevel := o.Keys()
+	fmt.Printf("topLevel: %v\n", topLevel)
+	parentNode = topLevel[0]
+
 	// Get a reference to the top level node we specified earlier
 	// TODO - validate this key exists
 	vislice, ok := o.Get(parentNode)
@@ -38,22 +108,63 @@ func main() {
 	columnNames := columnMap.Keys()
 	fmt.Printf("Creating excel workbook with following headings : '%v'\n", columnNames)
 
+	// Add the header row
+	row = 1
+	column = 1
+	for i := 0; i < len(columnNames); i++ {
+		cell, _ = excelize.CoordinatesToCellName(column, row)
+		fmt.Printf("Setting cell %s to value %s\n", cell, columnNames[i])
+		xlsx.SetCellValue(sheetName, cell, columnNames[i])
+		column++
+	}
+
+	// Set starting row for data
+	row = 2
+
+	fmt.Printf("Adding %d rows of data to spreadsheet.\n", len(vslice))
+
+	// Iterate the whole slice to get the data and add to the worksheet
 	for i, v := range vslice {
 		// Print the contents each slice
 		//fmt.Printf("'%d' : '%v'\n", i, v)
 
-		fmt.Printf("Slice element %d\n", i)
+		//fmt.Printf("Slice element %d\n", i)
+		_ = i
+
+		// Each iteration should start back at column 1
+		column = 1
 
 		// Print each key-value pair contained in this slice
 		vmap := v.(orderedmap.OrderedMap)
 		k := vmap.Keys()
+
 		for j := range k {
+			//a = string(asciiValue)
+			//cell = a + strconv.Itoa(2+i)
+			cell, _ = excelize.CoordinatesToCellName(column, row)
+
 			e, _ := vmap.Get(k[j])
-			fmt.Printf("'%s' : '%v'\n", k[j], e)
+			//fmt.Printf("Setting cell %s to value %v\n", cell, e)
+			xlsx.SetCellValue(sheetName, cell, e)
+
+			// Move to the next column
+			//asciiValue++
+			column++
 		}
 		//fmt.Printf("k: %v\n", k)
+
+		// Move to next row
+		row++
 	}
 
+	// Close off the file
+	if err := xlsx.SaveAs(outputFilename); err != nil {
+		log.Fatal(err)
+		return
+	}
+
+	fmt.Printf("Excel file '%s' generated sucessfully.\n", outputFilename)
+
 	/*
 		//Test https://gitlab.com/c0b/go-ordered-json
 		var om *ordered.OrderedMap = ordered.NewOrderedMap()
@@ -71,50 +182,14 @@ func main() {
 			fmt.Printf("%-12s: %v\n", pair.Key, pair.Value)
 		}
 	*/
+}
 
-	/*
+func fileExists(filename string) bool {
-	   var data interface{}
+	info, err := os.Stat(filename)
-	   json.Unmarshal(file, &data) // reading all json data
+	if os.IsNotExist(err) {
-	   //fmt.Println(data)
+		return false
-	   t, ok := data.([]interface{}) // assertion Interface
+	}
-	   _ = ok
+	return !info.IsDir()
-	   //fmt.Printf("%[1]v  %[1]T\n", t) //map[string]interface {}
-
-	   myMap := t[0] // aim here to get APP, Company and Category which will be the column name of Excel sheet
-	   fmt.Printf("myMap: %v\n", myMap)
-	   columnData, _ := myMap.(map[string]interface{}) // extract the underlying concrete data from interface
-	   fmt.Printf("columnData: %v\n", columnData)
-	   keys := make([]string, 0, len(columnData)) // creating and initializing slice to store column
-
-	   	for k := range columnData {
-	   		fmt.Printf("%[1]v %[1]T\n", k)
-	   		keys = append(keys, k)
-	   	}
-
-	   return
-
-	   xlsx := excelize.NewFile()
-	   sheetName := "Sheet1"
-	   xlsx.SetSheetName(xlsx.GetSheetName(1), sheetName)
-	   c := 'A'
-	   asciiValue := int(c)
-	   var a string
-
-	   	for i := 0; i < len(keys); i++ {
-	   		a = string(asciiValue)
-	   		xlsx.SetCellValue(sheetName, a+"1", keys[i])
-	   		asciiValue++
-	   	}
-
-	   err = xlsx.SaveAs("./Onkar.xlsx")
-
-	   	if err != nil {
-	   		fmt.Println(err)
-	   		return
-	   	}
-
-	   fmt.Println("Excel file generated sucessfully")
-	*/
 }
 
 func TestUnmarshalJSON() {