多维表格
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import XLSX from 'xlsx'
import { UITypes } from '~/components/project/spreadsheet/helpers/uiTypes'
import TemplateGenerator from '~/components/import/templateParsers/TemplateGenerator'
import { getCheckboxValue, isCheckboxType } from '~/components/import/templateParsers/parserHelpers'
const excelTypeToUidt = {
d: UITypes.DateTime,
b: UITypes.Checkbox,
n: UITypes.Number,
s: UITypes.SingleLineText
}
export default class ExcelTemplateAdapter extends TemplateGenerator {
constructor(name, ab, parserConfig = {}) {
super()
this.config = {
maxRowsToParse: 500,
...parserConfig
}
this.name = name
this.excelData = ab
this.project = {
title: this.name,
tables: []
}
this.data = {}
}
async init() {
this.wb = XLSX.read(new Uint8Array(this.excelData), { type: 'array', cellText: true, cellDates: true })
}
parse() {
const tableNamePrefixRef = {}
for (let i = 0; i < this.wb.SheetNames.length; i++) {
const columnNamePrefixRef = { id: 0 }
const sheet = this.wb.SheetNames[i]
let tn = (sheet || 'table').replace(/\W/g, '_').trim()
while (tn in tableNamePrefixRef) {
tn = `${tn}${++tableNamePrefixRef[tn]}`
}
tableNamePrefixRef[tn] = 0
const table = { table_name: tn, ref_table_name: tn, columns: [] }
this.data[tn] = []
const ws = this.wb.Sheets[sheet]
const range = XLSX.utils.decode_range(ws['!ref'])
const originalRows = XLSX.utils.sheet_to_json(ws, { header: 1, blankrows: false, cellDates: true, defval: null })
// fix precision bug & timezone offset issues introduced by xlsx
const basedate = new Date(1899, 11, 30, 0, 0, 0)
// number of milliseconds since base date
const dnthresh = basedate.getTime() + (new Date().getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000
// number of milliseconds in a day
const day_ms = 24 * 60 * 60 * 1000
// handle date1904 property
const fixImportedDate = (date) => {
const parsed = XLSX.SSF.parse_date_code((date.getTime() - dnthresh) / day_ms, {
date1904: this.wb.Workbook.WBProps.date1904
})
return new Date(parsed.y, parsed.m, parsed.d, parsed.H, parsed.M, parsed.S)
}
// fix imported date
const rows = originalRows.map(r => r.map((v) => {
return v instanceof Date ? fixImportedDate(v) : v
}))
const columnNameRowExist = +rows[0].every(v => v === null || typeof v === 'string')
// const colLen = Math.max()
for (let col = 0; col < rows[0].length; col++) {
let cn = ((columnNameRowExist && rows[0] && rows[0][col] && rows[0][col].toString().trim()) ||
`field_${col + 1}`).replace(/\W/g, '_').trim()
while (cn in columnNamePrefixRef) {
cn = `${cn}${++columnNamePrefixRef[cn]}`
}
columnNamePrefixRef[cn] = 0
const column = {
column_name: cn,
ref_column_name: cn
}
table.columns.push(column)
// const cellId = `${col.toString(26).split('').map(s => (parseInt(s, 26) + 10).toString(36).toUpperCase())}2`;
const cellId = XLSX.utils.encode_cell({
c: range.s.c + col,
r: columnNameRowExist
})
const cellProps = ws[cellId] || {}
column.uidt = excelTypeToUidt[cellProps.t] || UITypes.SingleLineText
// todo: optimize
if (column.uidt === UITypes.SingleLineText) {
// check for long text
if (rows.some(r =>
(r[col] || '').toString().match(/[\r\n]/) ||
(r[col] || '').toString().length > 255)
) {
column.uidt = UITypes.LongText
} else {
const vals = rows.slice(columnNameRowExist ? 1 : 0).map(r => r[col]).filter(v => v !== null && v !== undefined && v.toString().trim() !== '')
const checkboxType = isCheckboxType(vals)
if (checkboxType.length === 1) {
column.uidt = UITypes.Checkbox
} else {
// todo: optimize
// check column is multi or single select by comparing unique values
// todo:
if (vals.some(v => v && v.toString().includes(','))) {
let flattenedVals = vals.flatMap(v => v ? v.toString().trim().split(/\s*,\s*/) : [])
const uniqueVals = flattenedVals = flattenedVals
.filter((v, i, arr) => i === arr.findIndex(v1 => v.toLowerCase() === v1.toLowerCase()))
if (flattenedVals.length > uniqueVals.length && uniqueVals.length <= Math.ceil(flattenedVals.length / 2)) {
column.uidt = UITypes.MultiSelect
column.dtxp = `'${uniqueVals.join("','")}'`
}
} else {
const uniqueVals = vals.map(v => v.toString().trim()).filter((v, i, arr) => i === arr.findIndex(v1 => v.toLowerCase() === v1.toLowerCase()))
if (vals.length > uniqueVals.length && uniqueVals.length <= Math.ceil(vals.length / 2)) {
column.uidt = UITypes.SingleSelect
column.dtxp = `'${uniqueVals.join("','")}'`
}
}
}
}
} else if (column.uidt === UITypes.Number) {
if (rows.slice(1, this.config.maxRowsToParse).some((v) => {
return v && v[col] && parseInt(+v[col]) !== +v[col]
})) {
column.uidt = UITypes.Decimal
}
if (rows.slice(1, this.config.maxRowsToParse).every((v, i) => {
const cellId = XLSX.utils.encode_cell({
c: range.s.c + col,
r: i + (columnNameRowExist)
})
const cellObj = ws[cellId]
return !cellObj || (cellObj.w && cellObj.w.startsWith('$'))
})) {
column.uidt = UITypes.Currency
}
} else if (column.uidt === UITypes.DateTime) {
if (rows.slice(1, this.config.maxRowsToParse).every((v, i) => {
const cellId = XLSX.utils.encode_cell({
c: range.s.c + col,
r: i + columnNameRowExist
})
const cellObj = ws[cellId]
return !cellObj || (cellObj.w && cellObj.w.split(' ').length === 1)
})) {
column.uidt = UITypes.Date
}
}
}
let rowIndex = 0
for (const row of rows.slice(1)) {
const rowData = {}
for (let i = 0; i < table.columns.length; i++) {
if (table.columns[i].uidt === UITypes.Checkbox) {
rowData[table.columns[i].column_name] = getCheckboxValue(row[i])
} else if (table.columns[i].uidt === UITypes.Currency) {
const cellId = XLSX.utils.encode_cell({
c: range.s.c + i,
r: rowIndex + columnNameRowExist
})
const cellObj = ws[cellId]
rowData[table.columns[i].column_name] = (cellObj && cellObj.w && cellObj.w.replace(/[^\d.]+/g, '')) || row[i]
} else if (table.columns[i].uidt === UITypes.SingleSelect || table.columns[i].uidt === UITypes.MultiSelect) {
rowData[table.columns[i].column_name] = (row[i] || '').toString().trim() || null
} else {
// toto: do parsing if necessary based on type
rowData[table.columns[i].column_name] = row[i]
}
}
this.data[tn].push(rowData)
rowIndex++
}
this.project.tables.push(table)
}
}
getTemplate() {
return this.project
}
getData() {
return this.data
}
}