adrianbonpin
0cb70ecee0
v1.4.0: CSV/Excel/JSON/NextUp exports, units-first smart year standing, live export progress bar, AES-GCM at-rest password encryption.
230 lines
11 KiB
JavaScript
230 lines
11 KiB
JavaScript
(function (root, factory) {
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if (typeof module === 'object' && module.exports) {
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module.exports = factory();
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} else {
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root.ISMIStools = Object.assign(root.ISMIStools || {}, factory());
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}
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})(typeof self !== 'undefined' ? self : this, function () {
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'use strict';
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// ---- Minimal ZIP writer (STORED, no compression) ----
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// Produces a valid ZIP containing the XLSX parts. Stored entries are used
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// because we have no deflate available (browser + zero-dependency Node).
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function crc32(buf) {
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let table = [];
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for (let n = 0; n < 256; n++) {
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let c = n;
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for (let k = 0; k < 8; k++) c = c & 1 ? 0xedb88320 ^ (c >>> 1) : c >>> 1;
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table[n] = c >>> 0;
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}
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let crc = 0xffffffff;
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for (let i = 0; i < buf.length; i++) crc = table[(crc ^ buf[i]) & 0xff] ^ (crc >>> 8);
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return (crc ^ 0xffffffff) >>> 0;
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}
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function zipStore(entries) {
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// entries: [{ name, data: Uint8Array }]
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const chunks = [];
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const central = [];
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let offset = 0;
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const enc = new TextEncoder();
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for (const e of entries) {
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const nameBytes = enc.encode(e.name);
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const crc = crc32(e.data);
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const local = new Uint8Array(30 + nameBytes.length);
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const dv = new DataView(local.buffer);
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dv.setUint32(0, 0x04034b50, true); // local file header sig
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dv.setUint16(4, 20, true); // version needed
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dv.setUint16(6, 0, true); // flags
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dv.setUint16(8, 0, true); // method: stored
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dv.setUint16(10, 0, true); // mod time
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dv.setUint16(12, 0x21, true); // mod date
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dv.setUint32(14, crc, true);
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dv.setUint32(18, e.data.length, true); // compressed size
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dv.setUint32(22, e.data.length, true); // uncompressed size
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dv.setUint16(26, nameBytes.length, true); // name len
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dv.setUint16(28, 0, true); // extra len
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local.set(nameBytes, 30);
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chunks.push(local, e.data);
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const cd = new Uint8Array(46 + nameBytes.length);
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const cdv = new DataView(cd.buffer);
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cdv.setUint32(0, 0x02014b50, true); // central dir sig
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cdv.setUint16(4, 20, true); // version made by
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cdv.setUint16(6, 20, true); // version needed
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cdv.setUint16(8, 0, true); // flags
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cdv.setUint16(10, 0, true); // method stored
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cdv.setUint16(12, 0, true); // mod time
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cdv.setUint16(14, 0x21, true); // mod date
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cdv.setUint32(16, crc, true);
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cdv.setUint32(20, e.data.length, true);
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cdv.setUint32(24, e.data.length, true);
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cdv.setUint16(28, nameBytes.length, true);
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cdv.setUint16(30, 0, true); // extra len
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cdv.setUint16(32, 0, true); // comment len
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cdv.setUint16(34, 0, true); // disk start
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cdv.setUint16(36, 0, true); // internal attrs
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cdv.setUint32(38, 0, true); // external attrs
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cdv.setUint32(42, offset, true); // local header offset
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cd.set(nameBytes, 46);
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central.push(cd);
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offset += local.length + e.data.length;
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}
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const cdStart = offset;
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let cdLen = 0;
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for (const c of central) cdLen += c.length;
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const eocd = new Uint8Array(22);
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const eocdv = new DataView(eocd.buffer);
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eocdv.setUint32(0, 0x06054b50, true);
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eocdv.setUint16(8, entries.length, true); // total entries (this disk)
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eocdv.setUint16(10, entries.length, true);
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eocdv.setUint32(12, cdLen, true);
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eocdv.setUint32(16, cdStart, true);
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chunks.push(...central, eocd);
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const total = chunks.reduce((s, c) => s + c.length, 0);
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const out = new Uint8Array(total);
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let pos = 0;
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for (const c of chunks) { out.set(c, pos); pos += c.length; }
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return out;
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}
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// ---- XML helpers ----
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function esc(s) {
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return String(s == null ? '' : s)
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.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>')
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.replace(/"/g, '"').replace(/'/g, ''');
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}
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// ---- XLSX builder ----
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// Builds a single-sheet workbook: a title/header block + a course table
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// + a totals row, mirroring the CSV layout.
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function buildStudyLoadXlsx(data) {
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const header = data.header || {};
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const enc = new TextEncoder();
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// Gather all strings into a `sharedStrings` table; cells reference them.
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const strings = [];
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const sIndex = new Map();
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function addS(str) {
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const key = String(str == null ? '' : str);
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if (!sIndex.has(key)) { sIndex.set(key, strings.length); strings.push(key); }
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return sIndex.get(key);
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}
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// rows: array of arrays of { text } (all text cells for simplicity)
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const rows = [];
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rows.push([{ text: 'ISMIS HELPER - STUDY LOAD' }]);
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rows.push([{ text: 'Program' }, { text: header.program || '' }]);
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rows.push([{ text: 'Student Name' }, { text: header.fullName || header.studentName || '' }]);
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rows.push([{ text: 'Student ID' }, { text: header.studentId || '' }]);
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rows.push([{ text: 'Semester' }, { text: header.semester || '' }]);
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rows.push([{ text: 'Year Level' }, { text: header.yearLevel || '' }]);
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rows.push([{ text: 'Total Units' }, { text: data.totalUnits || '' }]);
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rows.push([]); // blank
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rows.push([{ text: 'Group' }, { text: 'Course Code' }, { text: 'Description' },
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{ text: 'Schedule' }, { text: 'Faculty' }, { text: 'Units' }, { text: 'Status' }]);
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for (const c of (data.courses || [])) {
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rows.push([
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{ text: c.group }, { text: c.courseCode }, { text: c.description },
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{ text: c.schedule }, { text: c.faculty || c.teacher }, { text: c.units },
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{ text: c.status }
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]);
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}
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rows.push([{ text: 'Total' }, { text: '' }, { text: '' }, { text: '' },
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{ text: '' }, { text: data.totalUnits || '' }, { text: '' }]);
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// Pre-compute shared string refs so sheet1.xml can reference them.
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const cellRefs = rows.map((row) => row.map((c) => c.text === '' ? -1 : addS(c.text)));
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// ---- sheet1.xml ----
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let sheetXml = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\n';
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sheetXml += '<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">';
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sheetXml += '<cols>' +
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'<col min="1" max="1" width="8" customWidth="1"/>' +
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'<col min="2" max="2" width="14" customWidth="1"/>' +
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'<col min="3" max="3" width="42" customWidth="1"/>' +
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'<col min="4" max="4" width="38" customWidth="1"/>' +
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'<col min="5" max="5" width="24" customWidth="1"/>' +
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'<col min="6" max="6" width="10" customWidth="1"/>' +
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'<col min="7" max="7" width="12" customWidth="1"/>' +
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'</cols>';
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sheetXml += '<sheetData>';
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const colNames = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J'];
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cellRefs.forEach((refs, ri) => {
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sheetXml += '<row r="' + (ri + 1) + '">';
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refs.forEach((s, ci) => {
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if (s < 0) return;
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sheetXml += '<c r="' + colNames[ci] + (ri + 1) + '" t="s"><v>' + s + '</v></c>';
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});
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sheetXml += '</row>';
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});
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sheetXml += '</sheetData></worksheet>';
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// ---- sharedStrings.xml ----
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let ssXml = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\n';
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ssXml += '<sst xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" count="' +
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cellRefs.reduce((s, r) => s + r.filter((x) => x >= 0).length, 0) +
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'" uniqueCount="' + strings.length + '">';
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for (const s of strings) ssXml += '<si><t>' + esc(s) + '</t></si>';
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ssXml += '</sst>';
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// ---- other parts ----
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const ct = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\n' +
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'<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">' +
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'<Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/>' +
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'<Default Extension="xml" ContentType="application/xml"/>' +
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'<Override PartName="/xl/workbook.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml"/>' +
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'<Override PartName="/xl/worksheets/sheet1.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/>' +
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'<Override PartName="/xl/sharedStrings.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml"/>' +
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'<Override PartName="/xl/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml"/>' +
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'</Types>';
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const rels = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\n' +
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'<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">' +
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'<Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="xl/workbook.xml"/>' +
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'</Relationships>';
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const wb = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\n' +
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'<workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" ' +
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'xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">' +
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'<sheets><sheet name="Study Load" sheetId="1" r:id="rId1"/></sheets></workbook>';
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const wbRels = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\n' +
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'<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">' +
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'<Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet1.xml"/>' +
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'<Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings" Target="sharedStrings.xml"/>' +
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'<Relationship Id="rId3" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles" Target="styles.xml"/>' +
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'</Relationships>';
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const xlRels = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\n' +
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'<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">' +
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'<Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="xl/workbook.xml"/>' +
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'</Relationships>';
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const styles = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\n' +
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'<styleSheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">' +
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'<fonts count="1"><font><sz val="11"/><name val="Calibri"/></font></fonts>' +
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'<fills count="1"><fill><patternFill patternType="none"/></fill></fills>' +
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'<borders count="1"><border><left/><right/><top/><bottom/><diagonal/></border></borders>' +
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'<cellStyleXfs count="1"><xf numFmtId="0" fontId="0" fillId="0" borderId="0"/></cellStyleXfs>' +
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'<cellXfs count="1"><xf numFmtId="0" fontId="0" fillId="0" borderId="0" xfId="0"/></cellXfs>' +
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'<cellStyles count="1"><cellStyle name="Normal" xfId="0" builtinId="0"/></cellStyles>' +
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'</styleSheet>';
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const parts = [
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{ name: '[Content_Types].xml', data: enc.encode(ct) },
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{ name: '_rels/.rels', data: enc.encode(rels) },
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{ name: 'xl/workbook.xml', data: enc.encode(wb) },
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{ name: 'xl/_rels/workbook.xml.rels', data: enc.encode(wbRels) },
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{ name: 'xl/worksheets/sheet1.xml', data: enc.encode(sheetXml) },
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{ name: 'xl/sharedStrings.xml', data: enc.encode(ssXml) },
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{ name: 'xl/styles.xml', data: enc.encode(styles) }
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];
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return zipStore(parts);
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}
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return { buildStudyLoadXlsx };
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});
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