652 lines
19 KiB
Go
652 lines
19 KiB
Go
// Copyright 2016 - 2023 The excelize Authors. All rights reserved. Use of
|
|
// this source code is governed by a BSD-style license that can be found in
|
|
// the LICENSE file.
|
|
//
|
|
// Package excelize providing a set of functions that allow you to write to and
|
|
// read from XLAM / XLSM / XLSX / XLTM / XLTX files. Supports reading and
|
|
// writing spreadsheet documents generated by Microsoft Excel™ 2007 and later.
|
|
// Supports complex components by high compatibility, and provided streaming
|
|
// API for generating or reading data from a worksheet with huge amounts of
|
|
// data. This library needs Go version 1.16 or later.
|
|
|
|
package excelize
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/xml"
|
|
"fmt"
|
|
"io"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
"unicode"
|
|
"unicode/utf8"
|
|
)
|
|
|
|
var (
|
|
expressionFormat = regexp.MustCompile(`"(?:[^"]|"")*"|\S+`)
|
|
conditionFormat = regexp.MustCompile(`(or|\|\|)`)
|
|
blankFormat = regexp.MustCompile("blanks|nonblanks")
|
|
matchFormat = regexp.MustCompile("[*?]")
|
|
)
|
|
|
|
// parseTableOptions provides a function to parse the format settings of the
|
|
// table with default value.
|
|
func parseTableOptions(opts *Table) (*Table, error) {
|
|
var err error
|
|
if opts == nil {
|
|
return &Table{ShowRowStripes: boolPtr(true)}, err
|
|
}
|
|
if opts.ShowRowStripes == nil {
|
|
opts.ShowRowStripes = boolPtr(true)
|
|
}
|
|
if err = checkDefinedName(opts.Name); err != nil {
|
|
return opts, err
|
|
}
|
|
return opts, err
|
|
}
|
|
|
|
// AddTable provides the method to add table in a worksheet by given worksheet
|
|
// name, range reference and format set. For example, create a table of A1:D5
|
|
// on Sheet1:
|
|
//
|
|
// err := f.AddTable("Sheet1", &excelize.Table{Range: "A1:D5"})
|
|
//
|
|
// Create a table of F2:H6 on Sheet2 with format set:
|
|
//
|
|
// disable := false
|
|
// err := f.AddTable("Sheet2", &excelize.Table{
|
|
// Range: "F2:H6",
|
|
// Name: "table",
|
|
// StyleName: "TableStyleMedium2",
|
|
// ShowFirstColumn: true,
|
|
// ShowLastColumn: true,
|
|
// ShowRowStripes: &disable,
|
|
// ShowColumnStripes: true,
|
|
// })
|
|
//
|
|
// Note that the table must be at least two lines including the header. The
|
|
// header cells must contain strings and must be unique, and must set the
|
|
// header row data of the table before calling the AddTable function. Multiple
|
|
// tables range reference that can't have an intersection.
|
|
//
|
|
// Name: The name of the table, in the same worksheet name of the table should
|
|
// be unique, starts with a letter or underscore (_), doesn't include a
|
|
// space or character, and should be no more than 255 characters
|
|
//
|
|
// StyleName: The built-in table style names
|
|
//
|
|
// TableStyleLight1 - TableStyleLight21
|
|
// TableStyleMedium1 - TableStyleMedium28
|
|
// TableStyleDark1 - TableStyleDark11
|
|
func (f *File) AddTable(sheet string, table *Table) error {
|
|
options, err := parseTableOptions(table)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
var exist bool
|
|
f.Pkg.Range(func(k, v interface{}) bool {
|
|
if strings.Contains(k.(string), "xl/tables/table") {
|
|
var t xlsxTable
|
|
if err := f.xmlNewDecoder(bytes.NewReader(namespaceStrictToTransitional(v.([]byte)))).
|
|
Decode(&t); err != nil && err != io.EOF {
|
|
return true
|
|
}
|
|
if exist = t.Name == options.Name; exist {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
})
|
|
if exist {
|
|
return ErrExistsTableName
|
|
}
|
|
// Coordinate conversion, convert C1:B3 to 2,0,1,2.
|
|
coordinates, err := rangeRefToCoordinates(options.Range)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// Correct table reference range, such correct C1:B3 to B1:C3.
|
|
_ = sortCoordinates(coordinates)
|
|
tableID := f.countTables() + 1
|
|
sheetRelationshipsTableXML := "../tables/table" + strconv.Itoa(tableID) + ".xml"
|
|
tableXML := strings.ReplaceAll(sheetRelationshipsTableXML, "..", "xl")
|
|
// Add first table for given sheet.
|
|
sheetXMLPath, _ := f.getSheetXMLPath(sheet)
|
|
sheetRels := "xl/worksheets/_rels/" + strings.TrimPrefix(sheetXMLPath, "xl/worksheets/") + ".rels"
|
|
rID := f.addRels(sheetRels, SourceRelationshipTable, sheetRelationshipsTableXML, "")
|
|
if err = f.addSheetTable(sheet, rID); err != nil {
|
|
return err
|
|
}
|
|
f.addSheetNameSpace(sheet, SourceRelationship)
|
|
if err = f.addTable(sheet, tableXML, coordinates[0], coordinates[1], coordinates[2], coordinates[3], tableID, options); err != nil {
|
|
return err
|
|
}
|
|
return f.addContentTypePart(tableID, "table")
|
|
}
|
|
|
|
// GetTables provides the method to get all tables in a worksheet by given
|
|
// worksheet name.
|
|
func (f *File) GetTables(sheet string) ([]Table, error) {
|
|
var tables []Table
|
|
ws, err := f.workSheetReader(sheet)
|
|
if err != nil {
|
|
return tables, err
|
|
}
|
|
if ws.TableParts == nil {
|
|
return tables, err
|
|
}
|
|
for _, tbl := range ws.TableParts.TableParts {
|
|
if tbl != nil {
|
|
target := f.getSheetRelationshipsTargetByID(sheet, tbl.RID)
|
|
tableXML := strings.ReplaceAll(target, "..", "xl")
|
|
content, ok := f.Pkg.Load(tableXML)
|
|
if !ok {
|
|
continue
|
|
}
|
|
var t xlsxTable
|
|
if err := f.xmlNewDecoder(bytes.NewReader(namespaceStrictToTransitional(content.([]byte)))).
|
|
Decode(&t); err != nil && err != io.EOF {
|
|
return tables, err
|
|
}
|
|
table := Table{
|
|
rID: tbl.RID,
|
|
Range: t.Ref,
|
|
Name: t.Name,
|
|
}
|
|
if t.TableStyleInfo != nil {
|
|
table.StyleName = t.TableStyleInfo.Name
|
|
table.ShowColumnStripes = t.TableStyleInfo.ShowColumnStripes
|
|
table.ShowFirstColumn = t.TableStyleInfo.ShowFirstColumn
|
|
table.ShowLastColumn = t.TableStyleInfo.ShowLastColumn
|
|
table.ShowRowStripes = &t.TableStyleInfo.ShowRowStripes
|
|
}
|
|
tables = append(tables, table)
|
|
}
|
|
}
|
|
return tables, err
|
|
}
|
|
|
|
// DeleteTable provides the method to delete table by given table name.
|
|
func (f *File) DeleteTable(name string) error {
|
|
if err := checkDefinedName(name); err != nil {
|
|
return err
|
|
}
|
|
for _, sheet := range f.GetSheetList() {
|
|
tables, err := f.GetTables(sheet)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, table := range tables {
|
|
if table.Name != name {
|
|
continue
|
|
}
|
|
ws, _ := f.workSheetReader(sheet)
|
|
for i, tbl := range ws.TableParts.TableParts {
|
|
if tbl.RID == table.rID {
|
|
ws.TableParts.TableParts = append(ws.TableParts.TableParts[:i], ws.TableParts.TableParts[i+1:]...)
|
|
f.deleteSheetRelationships(sheet, tbl.RID)
|
|
break
|
|
}
|
|
}
|
|
if ws.TableParts.Count = len(ws.TableParts.TableParts); ws.TableParts.Count == 0 {
|
|
ws.TableParts = nil
|
|
}
|
|
// Delete cell value in the table header
|
|
coordinates, err := rangeRefToCoordinates(table.Range)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_ = sortCoordinates(coordinates)
|
|
for col := coordinates[0]; col <= coordinates[2]; col++ {
|
|
for row := coordinates[1]; row < coordinates[1]+1; row++ {
|
|
cell, _ := CoordinatesToCellName(col, row)
|
|
err = f.SetCellValue(sheet, cell, nil)
|
|
}
|
|
}
|
|
return err
|
|
}
|
|
}
|
|
return newNoExistTableError(name)
|
|
}
|
|
|
|
// countTables provides a function to get table files count storage in the
|
|
// folder xl/tables.
|
|
func (f *File) countTables() int {
|
|
count := 0
|
|
f.Pkg.Range(func(k, v interface{}) bool {
|
|
if strings.Contains(k.(string), "xl/tables/table") {
|
|
count++
|
|
}
|
|
return true
|
|
})
|
|
return count
|
|
}
|
|
|
|
// addSheetTable provides a function to add tablePart element to
|
|
// xl/worksheets/sheet%d.xml by given worksheet name and relationship index.
|
|
func (f *File) addSheetTable(sheet string, rID int) error {
|
|
ws, err := f.workSheetReader(sheet)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
table := &xlsxTablePart{
|
|
RID: "rId" + strconv.Itoa(rID),
|
|
}
|
|
if ws.TableParts == nil {
|
|
ws.TableParts = &xlsxTableParts{}
|
|
}
|
|
ws.TableParts.Count++
|
|
ws.TableParts.TableParts = append(ws.TableParts.TableParts, table)
|
|
return err
|
|
}
|
|
|
|
// setTableHeader provides a function to set cells value in header row for the
|
|
// table.
|
|
func (f *File) setTableHeader(sheet string, showHeaderRow bool, x1, y1, x2 int) ([]*xlsxTableColumn, error) {
|
|
var (
|
|
tableColumns []*xlsxTableColumn
|
|
idx int
|
|
)
|
|
for i := x1; i <= x2; i++ {
|
|
idx++
|
|
cell, err := CoordinatesToCellName(i, y1)
|
|
if err != nil {
|
|
return tableColumns, err
|
|
}
|
|
name, _ := f.GetCellValue(sheet, cell)
|
|
if _, err := strconv.Atoi(name); err == nil {
|
|
if showHeaderRow {
|
|
_ = f.SetCellStr(sheet, cell, name)
|
|
}
|
|
}
|
|
if name == "" {
|
|
name = "Column" + strconv.Itoa(idx)
|
|
if showHeaderRow {
|
|
_ = f.SetCellStr(sheet, cell, name)
|
|
}
|
|
}
|
|
tableColumns = append(tableColumns, &xlsxTableColumn{
|
|
ID: idx,
|
|
Name: name,
|
|
})
|
|
}
|
|
return tableColumns, nil
|
|
}
|
|
|
|
// checkDefinedName check whether there are illegal characters in the defined
|
|
// name or table name. Verify that the name:
|
|
// 1. Starts with a letter or underscore (_)
|
|
// 2. Doesn't include a space or character that isn't allowed
|
|
func checkDefinedName(name string) error {
|
|
if utf8.RuneCountInString(name) > MaxFieldLength {
|
|
return ErrNameLength
|
|
}
|
|
for i, c := range name {
|
|
if string(c) == "_" {
|
|
continue
|
|
}
|
|
if unicode.IsLetter(c) {
|
|
continue
|
|
}
|
|
if i > 0 && unicode.IsDigit(c) {
|
|
continue
|
|
}
|
|
return newInvalidNameError(name)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// addTable provides a function to add table by given worksheet name,
|
|
// range reference and format set.
|
|
func (f *File) addTable(sheet, tableXML string, x1, y1, x2, y2, i int, opts *Table) error {
|
|
// Correct the minimum number of rows, the table at least two lines.
|
|
if y1 == y2 {
|
|
y2++
|
|
}
|
|
hideHeaderRow := opts != nil && opts.ShowHeaderRow != nil && !*opts.ShowHeaderRow
|
|
if hideHeaderRow {
|
|
y1++
|
|
}
|
|
// Correct table range reference, such correct C1:B3 to B1:C3.
|
|
ref, err := f.coordinatesToRangeRef([]int{x1, y1, x2, y2})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
tableColumns, _ := f.setTableHeader(sheet, !hideHeaderRow, x1, y1, x2)
|
|
name := opts.Name
|
|
if name == "" {
|
|
name = "Table" + strconv.Itoa(i)
|
|
}
|
|
t := xlsxTable{
|
|
XMLNS: NameSpaceSpreadSheet.Value,
|
|
ID: i,
|
|
Name: name,
|
|
DisplayName: name,
|
|
Ref: ref,
|
|
AutoFilter: &xlsxAutoFilter{
|
|
Ref: ref,
|
|
},
|
|
TableColumns: &xlsxTableColumns{
|
|
Count: len(tableColumns),
|
|
TableColumn: tableColumns,
|
|
},
|
|
TableStyleInfo: &xlsxTableStyleInfo{
|
|
Name: opts.StyleName,
|
|
ShowFirstColumn: opts.ShowFirstColumn,
|
|
ShowLastColumn: opts.ShowLastColumn,
|
|
ShowRowStripes: *opts.ShowRowStripes,
|
|
ShowColumnStripes: opts.ShowColumnStripes,
|
|
},
|
|
}
|
|
if hideHeaderRow {
|
|
t.AutoFilter = nil
|
|
t.HeaderRowCount = intPtr(0)
|
|
}
|
|
table, _ := xml.Marshal(t)
|
|
f.saveFileList(tableXML, table)
|
|
return nil
|
|
}
|
|
|
|
// AutoFilter provides the method to add auto filter in a worksheet by given
|
|
// worksheet name, range reference and settings. An auto filter in Excel is a
|
|
// way of filtering a 2D range of data based on some simple criteria. For
|
|
// example applying an auto filter to a cell range A1:D4 in the Sheet1:
|
|
//
|
|
// err := f.AutoFilter("Sheet1", "A1:D4", []excelize.AutoFilterOptions{})
|
|
//
|
|
// Filter data in an auto filter:
|
|
//
|
|
// err := f.AutoFilter("Sheet1", "A1:D4", []excelize.AutoFilterOptions{
|
|
// {Column: "B", Expression: "x != blanks"},
|
|
// })
|
|
//
|
|
// Column defines the filter columns in an auto filter range based on simple
|
|
// criteria
|
|
//
|
|
// It isn't sufficient to just specify the filter condition. You must also
|
|
// hide any rows that don't match the filter condition. Rows are hidden using
|
|
// the SetRowVisible function. Excelize can't filter rows automatically since
|
|
// this isn't part of the file format.
|
|
//
|
|
// Setting a filter criteria for a column:
|
|
//
|
|
// Expression defines the conditions, the following operators are available
|
|
// for setting the filter criteria:
|
|
//
|
|
// ==
|
|
// !=
|
|
// >
|
|
// <
|
|
// >=
|
|
// <=
|
|
// and
|
|
// or
|
|
//
|
|
// An expression can comprise a single statement or two statements separated
|
|
// by the 'and' and 'or' operators. For example:
|
|
//
|
|
// x < 2000
|
|
// x > 2000
|
|
// x == 2000
|
|
// x > 2000 and x < 5000
|
|
// x == 2000 or x == 5000
|
|
//
|
|
// Filtering of blank or non-blank data can be achieved by using a value of
|
|
// Blanks or NonBlanks in the expression:
|
|
//
|
|
// x == Blanks
|
|
// x == NonBlanks
|
|
//
|
|
// Excel also allows some simple string matching operations:
|
|
//
|
|
// x == b* // begins with b
|
|
// x != b* // doesn't begin with b
|
|
// x == *b // ends with b
|
|
// x != *b // doesn't end with b
|
|
// x == *b* // contains b
|
|
// x != *b* // doesn't contain b
|
|
//
|
|
// You can also use '*' to match any character or number and '?' to match any
|
|
// single character or number. No other regular expression quantifier is
|
|
// supported by Excel's filters. Excel's regular expression characters can be
|
|
// escaped using '~'.
|
|
//
|
|
// The placeholder variable x in the above examples can be replaced by any
|
|
// simple string. The actual placeholder name is ignored internally so the
|
|
// following are all equivalent:
|
|
//
|
|
// x < 2000
|
|
// col < 2000
|
|
// Price < 2000
|
|
func (f *File) AutoFilter(sheet, rangeRef string, opts []AutoFilterOptions) error {
|
|
coordinates, err := rangeRefToCoordinates(rangeRef)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_ = sortCoordinates(coordinates)
|
|
// Correct reference range, such correct C1:B3 to B1:C3.
|
|
ref, _ := f.coordinatesToRangeRef(coordinates, true)
|
|
filterDB := "_xlnm._FilterDatabase"
|
|
wb, err := f.workbookReader()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
sheetID, err := f.GetSheetIndex(sheet)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
filterRange := fmt.Sprintf("'%s'!%s", sheet, ref)
|
|
d := xlsxDefinedName{
|
|
Name: filterDB,
|
|
Hidden: true,
|
|
LocalSheetID: intPtr(sheetID),
|
|
Data: filterRange,
|
|
}
|
|
if wb.DefinedNames == nil {
|
|
wb.DefinedNames = &xlsxDefinedNames{
|
|
DefinedName: []xlsxDefinedName{d},
|
|
}
|
|
} else {
|
|
var definedNameExists bool
|
|
for idx := range wb.DefinedNames.DefinedName {
|
|
definedName := wb.DefinedNames.DefinedName[idx]
|
|
if definedName.Name == filterDB && *definedName.LocalSheetID == sheetID && definedName.Hidden {
|
|
wb.DefinedNames.DefinedName[idx].Data = filterRange
|
|
definedNameExists = true
|
|
}
|
|
}
|
|
if !definedNameExists {
|
|
wb.DefinedNames.DefinedName = append(wb.DefinedNames.DefinedName, d)
|
|
}
|
|
}
|
|
columns := coordinates[2] - coordinates[0]
|
|
return f.autoFilter(sheet, ref, columns, coordinates[0], opts)
|
|
}
|
|
|
|
// autoFilter provides a function to extract the tokens from the filter
|
|
// expression. The tokens are mainly non-whitespace groups.
|
|
func (f *File) autoFilter(sheet, ref string, columns, col int, opts []AutoFilterOptions) error {
|
|
ws, err := f.workSheetReader(sheet)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if ws.SheetPr != nil {
|
|
ws.SheetPr.FilterMode = true
|
|
}
|
|
ws.SheetPr = &xlsxSheetPr{FilterMode: true}
|
|
filter := &xlsxAutoFilter{
|
|
Ref: ref,
|
|
}
|
|
ws.AutoFilter = filter
|
|
for _, opt := range opts {
|
|
if opt.Column == "" || opt.Expression == "" {
|
|
continue
|
|
}
|
|
fsCol, err := ColumnNameToNumber(opt.Column)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
offset := fsCol - col
|
|
if offset < 0 || offset > columns {
|
|
return fmt.Errorf("incorrect index of column '%s'", opt.Column)
|
|
}
|
|
fc := &xlsxFilterColumn{ColID: offset}
|
|
token := expressionFormat.FindAllString(opt.Expression, -1)
|
|
if len(token) != 3 && len(token) != 7 {
|
|
return fmt.Errorf("incorrect number of tokens in criteria '%s'", opt.Expression)
|
|
}
|
|
expressions, tokens, err := f.parseFilterExpression(opt.Expression, token)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
f.writeAutoFilter(fc, expressions, tokens)
|
|
filter.FilterColumn = append(filter.FilterColumn, fc)
|
|
}
|
|
ws.AutoFilter = filter
|
|
return nil
|
|
}
|
|
|
|
// writeAutoFilter provides a function to check for single or double custom
|
|
// filters as default filters and handle them accordingly.
|
|
func (f *File) writeAutoFilter(fc *xlsxFilterColumn, exp []int, tokens []string) {
|
|
if len(exp) == 1 && exp[0] == 2 {
|
|
// Single equality.
|
|
var filters []*xlsxFilter
|
|
filters = append(filters, &xlsxFilter{Val: tokens[0]})
|
|
fc.Filters = &xlsxFilters{Filter: filters}
|
|
return
|
|
}
|
|
if len(exp) == 3 && exp[0] == 2 && exp[1] == 1 && exp[2] == 2 {
|
|
// Double equality with "or" operator.
|
|
var filters []*xlsxFilter
|
|
for _, v := range tokens {
|
|
filters = append(filters, &xlsxFilter{Val: v})
|
|
}
|
|
fc.Filters = &xlsxFilters{Filter: filters}
|
|
return
|
|
}
|
|
// Non default custom filter.
|
|
expRel, andRel := map[int]int{0: 0, 1: 2}, map[int]bool{0: true, 1: false}
|
|
for k, v := range tokens {
|
|
f.writeCustomFilter(fc, exp[expRel[k]], v)
|
|
if k == 1 {
|
|
fc.CustomFilters.And = andRel[exp[k]]
|
|
}
|
|
}
|
|
}
|
|
|
|
// writeCustomFilter provides a function to write the <customFilter> element.
|
|
func (f *File) writeCustomFilter(fc *xlsxFilterColumn, operator int, val string) {
|
|
operators := map[int]string{
|
|
1: "lessThan",
|
|
2: "equal",
|
|
3: "lessThanOrEqual",
|
|
4: "greaterThan",
|
|
5: "notEqual",
|
|
6: "greaterThanOrEqual",
|
|
22: "equal",
|
|
}
|
|
customFilter := xlsxCustomFilter{
|
|
Operator: operators[operator],
|
|
Val: val,
|
|
}
|
|
if fc.CustomFilters != nil {
|
|
fc.CustomFilters.CustomFilter = append(fc.CustomFilters.CustomFilter, &customFilter)
|
|
return
|
|
}
|
|
var customFilters []*xlsxCustomFilter
|
|
customFilters = append(customFilters, &customFilter)
|
|
fc.CustomFilters = &xlsxCustomFilters{CustomFilter: customFilters}
|
|
}
|
|
|
|
// parseFilterExpression provides a function to converts the tokens of a
|
|
// possibly conditional expression into 1 or 2 sub expressions for further
|
|
// parsing.
|
|
//
|
|
// Examples:
|
|
//
|
|
// ('x', '==', 2000) -> exp1
|
|
// ('x', '>', 2000, 'and', 'x', '<', 5000) -> exp1 and exp2
|
|
func (f *File) parseFilterExpression(expression string, tokens []string) ([]int, []string, error) {
|
|
var expressions []int
|
|
var t []string
|
|
if len(tokens) == 7 {
|
|
// The number of tokens will be either 3 (for 1 expression) or 7 (for 2
|
|
// expressions).
|
|
conditional, c := 0, tokens[3]
|
|
if conditionFormat.MatchString(c) {
|
|
conditional = 1
|
|
}
|
|
expression1, token1, err := f.parseFilterTokens(expression, tokens[:3])
|
|
if err != nil {
|
|
return expressions, t, err
|
|
}
|
|
expression2, token2, err := f.parseFilterTokens(expression, tokens[4:7])
|
|
if err != nil {
|
|
return expressions, t, err
|
|
}
|
|
return []int{expression1[0], conditional, expression2[0]}, []string{token1, token2}, nil
|
|
}
|
|
exp, token, err := f.parseFilterTokens(expression, tokens)
|
|
if err != nil {
|
|
return expressions, t, err
|
|
}
|
|
return exp, []string{token}, nil
|
|
}
|
|
|
|
// parseFilterTokens provides a function to parse the 3 tokens of a filter
|
|
// expression and return the operator and token.
|
|
func (f *File) parseFilterTokens(expression string, tokens []string) ([]int, string, error) {
|
|
operators := map[string]int{
|
|
"==": 2,
|
|
"=": 2,
|
|
"=~": 2,
|
|
"eq": 2,
|
|
"!=": 5,
|
|
"!~": 5,
|
|
"ne": 5,
|
|
"<>": 5,
|
|
"<": 1,
|
|
"<=": 3,
|
|
">": 4,
|
|
">=": 6,
|
|
}
|
|
operator, ok := operators[strings.ToLower(tokens[1])]
|
|
if !ok {
|
|
// Convert the operator from a number to a descriptive string.
|
|
return []int{}, "", newUnknownFilterTokenError(tokens[1])
|
|
}
|
|
token := tokens[2]
|
|
// Special handling for Blanks/NonBlanks.
|
|
re := blankFormat.MatchString(strings.ToLower(token))
|
|
if re {
|
|
// Only allow Equals or NotEqual in this context.
|
|
if operator != 2 && operator != 5 {
|
|
return []int{operator}, token, fmt.Errorf("the operator '%s' in expression '%s' is not valid in relation to Blanks/NonBlanks'", tokens[1], expression)
|
|
}
|
|
token = strings.ToLower(token)
|
|
// The operator should always be 2 (=) to flag a "simple" equality in
|
|
// the binary record. Therefore we convert <> to =.
|
|
if token == "blanks" {
|
|
if operator == 5 {
|
|
token = " "
|
|
}
|
|
} else {
|
|
if operator == 5 {
|
|
operator = 2
|
|
token = "blanks"
|
|
} else {
|
|
operator = 5
|
|
token = " "
|
|
}
|
|
}
|
|
}
|
|
// If the string token contains an Excel match character then change the
|
|
// operator type to indicate a non "simple" equality.
|
|
if re = matchFormat.MatchString(token); operator == 2 && re {
|
|
operator = 22
|
|
}
|
|
return []int{operator}, token, nil
|
|
}
|