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This commit is contained in:
Timothy Jaeryang Baek
2026-03-06 20:12:37 -06:00
parent 7806cd5aef
commit 6d9996e599
78 changed files with 1340 additions and 466 deletions
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src/lib/utils/excelToTable.ts
+53 -51
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@@ -12,25 +12,25 @@ import type { WorkSheet } from 'xlsx';
/** Convert column index (0-based) to Excel-style letter (A, B, …, Z, AA, AB, …) */
const colLetter = (i: number): string => {
let s = '';
let n = i;
while (n >= 0) {
s = String.fromCharCode(65 + (n % 26)) + s;
n = Math.floor(n / 26) - 1;
}
return s;
let s = '';
let n = i;
while (n >= 0) {
s = String.fromCharCode(65 + (n % 26)) + s;
n = Math.floor(n / 26) - 1;
}
return s;
};
/** Escape HTML entities */
const esc = (v: unknown): string => {
if (v === null || v === undefined || v === '') return ' ';
return String(v).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
if (v === null || v === undefined || v === '') return '&nbsp;';
return String(v).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
};
export interface ExcelTableResult {
html: string;
rowCount: number;
colCount: number;
html: string;
rowCount: number;
colCount: number;
}
/**
@@ -38,49 +38,51 @@ export interface ExcelTableResult {
* Uses sheet_to_json with header:1 for a raw 2D array.
*/
export async function excelToTable(worksheet: WorkSheet): Promise<ExcelTableResult> {
const XLSX = await import('xlsx');
const rows: unknown[][] = XLSX.utils.sheet_to_json(worksheet, { header: 1, defval: '' });
const XLSX = await import('xlsx');
const rows: unknown[][] = XLSX.utils.sheet_to_json(worksheet, { header: 1, defval: '' });
if (rows.length === 0) {
return { html: '<table><tbody><tr><td>&nbsp;</td></tr></tbody></table>', rowCount: 0, colCount: 0 };
}
if (rows.length === 0) {
return {
html: '<table><tbody><tr><td>&nbsp;</td></tr></tbody></table>',
rowCount: 0,
colCount: 0
};
}
// Determine column count from the widest row
const colCount = rows.reduce((max, row) => Math.max(max, row.length), 0);
const rowCount = rows.length;
// Determine column count from the widest row
const colCount = rows.reduce((max, row) => Math.max(max, row.length), 0);
const rowCount = rows.length;
const parts: string[] = [];
parts.push('<table>');
const parts: string[] = [];
parts.push('<table>');
// Column letter header row
parts.push('<thead><tr>');
parts.push('<th class="excel-row-num"></th>'); // corner cell
for (let c = 0; c < colCount; c++) {
parts.push(`<th class="excel-col-hdr">${colLetter(c)}</th>`);
}
parts.push('</tr></thead>');
// Column letter header row
parts.push('<thead><tr>');
parts.push('<th class="excel-row-num"></th>'); // corner cell
for (let c = 0; c < colCount; c++) {
parts.push(`<th class="excel-col-hdr">${colLetter(c)}</th>`);
}
parts.push('</tr></thead>');
// Data rows
parts.push('<tbody>');
for (let r = 0; r < rowCount; r++) {
const row = rows[r];
parts.push('<tr>');
parts.push(`<td class="excel-row-num">${r + 1}</td>`);
for (let c = 0; c < colCount; c++) {
const val = c < row.length ? row[c] : '';
const isNum = typeof val === 'number';
parts.push(
`<td${isNum ? ' class="excel-num"' : ''}>${esc(val)}</td>`
);
}
parts.push('</tr>');
}
parts.push('</tbody></table>');
// Data rows
parts.push('<tbody>');
for (let r = 0; r < rowCount; r++) {
const row = rows[r];
parts.push('<tr>');
parts.push(`<td class="excel-row-num">${r + 1}</td>`);
for (let c = 0; c < colCount; c++) {
const val = c < row.length ? row[c] : '';
const isNum = typeof val === 'number';
parts.push(`<td${isNum ? ' class="excel-num"' : ''}>${esc(val)}</td>`);
}
parts.push('</tr>');
}
parts.push('</tbody></table>');
const DOMPurify = (await import('dompurify')).default;
return {
html: DOMPurify.sanitize(parts.join('')),
rowCount,
colCount
};
const DOMPurify = (await import('dompurify')).default;
return {
html: DOMPurify.sanitize(parts.join('')),
rowCount,
colCount
};
}