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reader.go
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reader.go
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package excelstructure
import (
"fmt"
"reflect"
"strconv"
sliceutil "github.com/booyangcc/utils/sliceutil"
"github.com/hashicorp/go-multierror"
)
// ReadWithSheetName parse with sheet index. start with 1
func (p *Parser) ReadWithSheetName(fileName, sheetName string, output interface{}) error {
excelData, err := p.Parse(fileName)
if err != nil {
return err
}
return p.readToStruct(sheetName, excelData, output)
}
// ReadWithMultiSheet parse with sheetDataMap, key is sheetName, value is output, output must be a pointer slice
func (p *Parser) ReadWithMultiSheet(fileName string, sheetDataMap map[string]interface{}) error {
excelData, err := p.Parse(fileName)
if err != nil {
return err
}
fmt.Println(excelData.SheetList)
for name, output := range sheetDataMap {
err = p.readToStruct(name, excelData, output)
if err != nil {
return err
}
}
return nil
}
// Parser parse with sheet index 1
// output must be a pointer slice
// if the pointer field is pointer, and the value is empty ,the pointer field will be nil
func (p *Parser) Read(fileName string, output interface{}) error {
excelData, err := p.Parse(fileName)
if err != nil {
return err
}
return p.readToStruct("", excelData, output)
}
func (p *Parser) readToStruct(sheetName string, excelData *Data, output interface{}) (errs error) {
if !sliceutil.InSlice(sheetName, excelData.SheetList) {
errs = multierror.Append(errs,
NewError(p.fileName, "", fmt.Sprintf("sheetName %s", sheetName), ErrorSheetName))
return
}
if sheetName == "" {
if len(excelData.SheetList) == 0 {
return
}
sheetName = excelData.SheetList[0]
}
p.currentSheetName = p.excelFile.GetSheetList()[0]
sheetData := excelData.SheetNameData[sheetName]
rv := reflect.ValueOf(output)
if rv.Kind() == reflect.Ptr && rv.Elem().Kind() != reflect.Slice {
errs = multierror.Append(errs,
NewError(p.fileName, p.currentSheetName, "", ErrorInOutputType))
return
}
sliceType := rv.Elem().Type()
sliceElemType := sliceType.Elem()
sliceElemStructType, err := getSliceElemType(p.fileName, p.currentSheetName, rv)
if err != nil {
errs = multierror.Append(errs, err)
return
}
tagMap := parseFieldTagSetting(sliceElemStructType)
arr := reflect.MakeSlice(sliceType, 0, 0)
for i := range sheetData.Rows {
out := reflect.New(sliceElemStructType)
if err := p.parseRowToStruct(i, sheetData, out, tagMap); err != nil {
p.appendError(errs, err)
continue
}
if sliceElemType.Kind() == reflect.Ptr {
arr = reflect.Append(arr, out)
}
if sliceElemType.Kind() == reflect.Struct {
arr = reflect.Append(arr, out.Elem())
}
}
rv.Elem().Set(arr)
return
}
func (p *Parser) appendError(errs error, err error) {
if errs == nil {
return
}
if err == nil {
return
}
if p.errsMap == nil {
p.errsMap = make(map[string]error)
}
if _, ok := p.errsMap[err.Error()]; ok {
return
}
errs = multierror.Append(errs, err)
p.errsMap[err.Error()] = err
}
// parse row to struct by tag setting
func (p *Parser) parseRowToStruct(
rowIndex int, sheetData *SheetData, ve reflect.Value, tagMap map[string]TagSetting,
) (err error) {
if ve.Kind() != reflect.Ptr {
return NewError(p.fileName, p.currentSheetName, fmt.Sprintf("row %d", rowIndex), ErrorTypePointer)
}
if !ve.IsValid() {
return NewError(p.fileName, p.currentSheetName, fmt.Sprintf("row %d", rowIndex), ErrorFieldInvalid)
}
vek := reflect.Indirect(ve)
createStruct := vek.Type()
for i := 0; i < createStruct.NumField(); i++ {
field := createStruct.Field(i)
tag := field.Tag
et := tag.Get(TagName)
columnName, df, skip, serializer := field.Name, "", false, "json"
if len(et) > 0 {
val, ok := tagMap[field.Name]
if ok {
columnName = val.Column
df = val.Default
skip = val.Skip
serializer = val.Serializer
}
}
if skip {
continue
}
cell, err1 := sheetData.GetCell(rowIndex, columnName)
if err1 != nil {
return err1
}
if p.IsCheckEmpty && cell.IsEmpty {
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldValueEmpty)
}
fieldValue := ve.Elem().FieldByName(field.Name)
fieldType := field.Type
if fieldType.Kind() == reflect.Ptr {
fieldType = fieldType.Elem()
}
fieldTypeKind := uint(fieldType.Kind())
if (uint(reflect.Invalid) < fieldTypeKind && fieldTypeKind < uint(reflect.Float64)) ||
fieldTypeKind == uint(reflect.String) {
err = p.fieldSetAll(fieldValue, cell, df)
if err != nil {
return err
}
} else {
err = p.fieldUmarshal(fieldValue, cell, serializer)
if err != nil {
return err
}
}
}
return err
}
func (p *Parser) fieldUmarshal(field reflect.Value, cell *Cell, serializerName string) error {
fieldType := field.Type()
newField := reflect.New(fieldType)
var serializer Serializer
var ok bool
if IsDefaultSerializer(serializerName) {
serializer = DefaultSerializer
} else {
if serializer, ok = p.serializers[serializerName]; !ok {
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorSerializerNotExist)
}
}
if len(cell.Value) > 0 {
err := serializer.Unmarshal(cell.Value, newField.Interface())
if err != nil {
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, err)
}
}
if !field.CanSet() {
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldNotSet)
}
field.Set(newField.Elem())
return nil
}
func (p *Parser) fieldSetAll(field reflect.Value, cell *Cell, defaultValue string) error {
value := cell.Value
if value == "" {
value = defaultValue
}
var err error
switch field.Kind() {
case reflect.Ptr:
valType := field.Type()
valElemType := valType.Elem()
if field.CanSet() {
realVal := field
if realVal.IsNil() {
realVal = reflect.New(valElemType)
if value != "" {
err = p.fieldSet(realVal.Elem(), value, cell)
field.Set(realVal)
} else {
field.Set(reflect.Zero(valType))
}
}
} else {
err = NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldNotSet)
}
default:
if field.CanSet() {
err = p.fieldSet(field, value, cell)
} else {
err = NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldNotSet)
}
}
if err != nil {
return err
}
return nil
}
func (p *Parser) fieldSet(field reflect.Value, value string, cell *Cell) error {
if !field.IsValid() {
fmt.Println(field.Kind())
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldNotSet)
}
if !field.CanSet() {
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldNotSet)
}
switch field.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
intValue, err := strconv.Atoi(value)
if err != nil {
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldNotMatch)
}
field.SetInt(int64(intValue))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
uintValue, err := strconv.ParseUint(value, 10, 32)
if err != nil {
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldNotMatch)
}
field.SetUint(uintValue)
case reflect.String:
field.SetString(value)
case reflect.Bool:
field.SetBool(sliceutil.InSlice(value, p.BoolTrueValues))
case reflect.Float32, reflect.Float64:
floatValue, err := strconv.ParseFloat(value, 32)
if err != nil {
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldNotMatch)
}
field.SetFloat(floatValue)
default:
return NewError(p.fileName, p.currentSheetName, cell.Coordinates, ErrorFieldTypeNotSupport)
}
return nil
}