BE/src/utils/helper.ts
2025-08-07 15:15:19 +05:30

642 lines
24 KiB
TypeScript

import {
BadRequestException,
InternalServerErrorException,
Logger,
} from '@nestjs/common';
import * as oracledb from 'oracledb';
const PDFDocument = require('pdfkit');
const fs = require('fs');
const path = require('path');
import { PDFDocument as pdfl } from 'pdf-lib';
import PDFMerger from 'pdf-merger-js';
import * as fsPromises from 'fs/promises';
import { BadRequestException as BR } from 'src/exceptions/badRequest.exception';
const doc = new PDFDocument({
size: 'A4',
margins: {
top: 50,
bottom: 50,
left: 50,
right: 50
}
});
const logger = new Logger('Helper');
export const handleError = (error: any, context: string = 'UnknownService'): never => {
if (error instanceof BadRequestException || error instanceof BR) {
logger.warn(`[${context}] ${error.message}`);
throw error;
}
if (error.message?.includes('NJS-107')) {
logger.warn(`[${context}] Invalid cursor encountered: ${error.message}`);
throw new BadRequestException('Invalid database response.');
}
if (error.message?.includes('ORA-')) {
logger.error(`[${context}] Oracle error occurred: ${error.message}`);
throw new InternalServerErrorException(error.message);
}
logger.error(`[${context}] Unexpected error:`, error.stack || error);
throw new InternalServerErrorException(error.message || 'Internal error');
};
export const closeOracleDbConnection = async (connection: any, context: string = 'UnknownService'): Promise<void> => {
if (connection) {
try {
await connection.close();
} catch (closeErr) {
logger.error(`[${context}] Failed to close DB connection`, closeErr.stack || closeErr);
}
}
};
export const fetchCursor = async <T>(cursor: oracledb.ResultSet<T>, context: string = 'UnknownService'): Promise<T[]> => {
try {
const rows = await cursor.getRows();
await cursor.close();
return rows;
} catch (err) {
logger.error(`[${context}] Failed to fetch from cursor`, err.stack || err);
throw new InternalServerErrorException('Error reading data from database.');
}
};
export const setEmptyStringsToNull = (obj: any): void => {
Object.keys(obj).forEach((key) => {
if (typeof obj[key] === 'object' && obj[key] !== null) {
setEmptyStringsToNull(obj[key]);
} else if (obj[key] === '') {
obj[key] = null;
}
});
}
export interface pdfGLData {
itemNo: number;
description: string;
noOfPieces: number;
weight: string;
itemValue: number;
countryOfOrigin: string
}
export interface pdfCarnetData {
carnetNo: string;
contPageNo: number;
}
function formatNumber(num) {
if (isNaN(num)) return 'N/A';
return num.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
}
export const generateGeneralistPDF1 = async (jsonData: pdfGLData[], headerData: pdfCarnetData) => {
// --- Table Configuration ---
const table = {
x: doc.x,
y: doc.y + 20, // Start a bit below the current cursor
cellTopPadding: 5,
cellBottomPadding: 2,
cellHorizontalPadding: 5,
cellSpacing: 0,
headerColor: '#FFFFFF',
rowColor: '#FFFFFF',
alternatingRowColor: '#FFFFFF',
lineColor: '#000000',
headerFontColor: '#000000',
bodyFontColor: '#000000',
fontSize: 10,
headerFontSize: 10,
lineWidth: 0.5,
widths: [50, 120, 70, 80, 70, 100], //
totalRowPaddingTop: 10 // New padding for the total row
};
// Define the maximum number of lines for the entire page
const maxLinesPerPage = 37;
const fixedHeaderRowHeight = 22; // You can tweak this value
const fixedHeaderFontSize = 10; // Same font size for all rows
// Fixed header rows, which are not part of the dynamic data
function getFixedHeaderData(headerValues) {
return [
{
isMergedRow: true,
cols: [
{ text: 'General List', startCol: 0, endCol: 5, }
]
},
{
isMergedRow: true,
cols: [
{ text: '', startCol: 0, endCol: 2 },
{ text: 'Carnet No:', startCol: 3, endCol: 4 },
{ text: headerValues.carnetNo, startCol: 5, endCol: 5 },
]
},
{
isMergedRow: true,
cols: [
{ text: '', startCol: 0, endCol: 2 },
{ text: 'Contn.Sheet No:', startCol: 3, endCol: 4 },
{ text: headerValues.contPageNo, startCol: 5, endCol: 5 },
]
},
{ // This is the new blank row
isMergedRow: true,
cols: [
{ text: '', startCol: 0, endCol: 5 }
]
},
['Item No', 'Description', 'No of Pieces', 'Weight', 'Item Value', 'Country Of Origin']
];
}
// Helper function to draw a single horizontal line
function drawHorizontalLine(doc, x, y, width, lineColor, lineWidth) {
doc.strokeColor(lineColor)
.lineWidth(lineWidth)
.moveTo(x, y)
.lineTo(x + width, y)
.stroke();
}
// Helper function to draw vertical lines between columns for a specific height range
function drawVerticalLines(doc, table, startY, endY) {
doc.strokeColor(table.lineColor)
.lineWidth(table.lineWidth);
let verticalX = table.x;
for (let i = 0; i < table.widths.length; i++) {
doc.moveTo(verticalX, startY)
.lineTo(verticalX, endY)
.stroke();
verticalX += table.widths[i];
}
// Draw the final right vertical line
doc.moveTo(verticalX, startY)
.lineTo(verticalX, endY)
.stroke();
}
// Helper function to draw the table header
function drawHeader(doc, table, headerData, cursorY, initialX, totalTableWidth) {
const totalVerticalPadding = table.cellTopPadding + table.cellBottomPadding;
const totalHorizontalPadding = table.cellHorizontalPadding * 2;
let headerHeight = 0;
let maxTextHeight = 0;
doc.fontSize(table.headerFontSize).font('Helvetica');
for (let i = 0; i < headerData.length; i++) {
const textOptions = {
width: table.widths[i] - totalHorizontalPadding,
lineGap: 3
};
const h = doc.heightOfString(headerData[i], textOptions);
if (h > maxTextHeight) maxTextHeight = h;
}
headerHeight = maxTextHeight + totalVerticalPadding;
const headerLines = Math.ceil(maxTextHeight / doc.heightOfString('a', { lineGap: 3 }));
let currentX = initialX;
for (let i = 0; i < headerData.length; i++) {
doc.rect(currentX, cursorY, table.widths[i], headerHeight).fill(table.headerColor);
currentX += table.widths[i];
}
currentX = initialX;
for (let i = 0; i < headerData.length; i++) {
doc.fillColor(table.headerFontColor);
doc.text(headerData[i], currentX + table.cellHorizontalPadding, cursorY + table.cellTopPadding, {
width: table.widths[i] - totalHorizontalPadding,
lineGap: 3
});
currentX += table.widths[i];
}
return { height: headerHeight, lines: headerLines };
}
// Helper function to draw a merged row
function drawMergedRow(doc, table, rowData, cursorY, initialX) {
const totalHorizontalPadding = table.cellHorizontalPadding * 2;
const rowHeight = fixedHeaderRowHeight; // Use fixed height
const fontSize = fixedHeaderFontSize;
let currentX = initialX;
doc.fontSize(fontSize).font('Helvetica'); // Ensure consistent font
for (let i = 0; i < table.widths.length; i++) {
const cell = rowData.cols.find(c => c.startCol === i);
if (cell) {
let mergedWidth = 0;
for (let j = cell.startCol; j <= cell.endCol; j++) {
mergedWidth += table.widths[j];
}
const fillColor = table.rowColor;
doc.rect(currentX, cursorY, mergedWidth, rowHeight).fill(fillColor);
if (cell.text) {
doc.fillColor(table.bodyFontColor);
doc.text(cell.text, currentX + table.cellHorizontalPadding, cursorY + table.cellTopPadding, {
width: mergedWidth - totalHorizontalPadding,
height: rowHeight - table.cellTopPadding - table.cellBottomPadding,
lineGap: 3
});
}
currentX += mergedWidth;
i = cell.endCol;
} else {
currentX += table.widths[i];
}
}
return { height: rowHeight, lines: 1 };
}
// Helper function to draw the fixed header block
function drawFixedHeader(doc, table, fixedHeaderData, cursorY, initialX, totalTableWidth) {
let headerBlockHeight = 0;
let headerBlockLines = 0;
let horizontalLineYCoords: number[] = [];
horizontalLineYCoords.push(cursorY); // Top of the entire header block
// Draw merged rows (first 4 rows, including the new blank one)
for (let i = 0; i < 4; i++) {
const rowData = fixedHeaderData[i];
const { height: rowHeight, lines: rowLines } = drawMergedRow(doc, table, rowData, cursorY, initialX);
cursorY += rowHeight;
headerBlockHeight += rowHeight;
headerBlockLines += rowLines;
horizontalLineYCoords.push(cursorY);
}
// Draw the main header
const headerRow = fixedHeaderData[4];
const { height: headerHeight, lines: headerLines } = drawHeader(doc, table, headerRow, cursorY, initialX, totalTableWidth);
cursorY += headerHeight;
headerBlockHeight += headerHeight;
headerBlockLines += headerLines;
horizontalLineYCoords.push(cursorY);
// Now draw the horizontal lines for the entire header block
for (const yCoord of horizontalLineYCoords) {
drawHorizontalLine(doc, initialX, yCoord, totalTableWidth, table.lineColor, table.lineWidth);
}
// Now, manually draw the vertical lines for each header row based on its merged cells
// Outer left border for the entire header block
doc.moveTo(initialX, horizontalLineYCoords[0]).lineTo(initialX, cursorY).stroke();
// Outer right border for the entire header block
doc.moveTo(initialX + totalTableWidth, horizontalLineYCoords[0]).lineTo(initialX + totalTableWidth, cursorY).stroke();
// Loop through the fixed header rows to draw internal vertical lines
for (let i = 0; i < fixedHeaderData.length; i++) {
const rowData = fixedHeaderData[i];
const topY = horizontalLineYCoords[i];
const bottomY = horizontalLineYCoords[i + 1];
let currentX = initialX;
if (Array.isArray(rowData)) {
// Draw all vertical lines for the non-merged header row
for (let j = 0; j < table.widths.length - 1; j++) {
currentX += table.widths[j];
doc.moveTo(currentX, topY).lineTo(currentX, bottomY).stroke();
}
} else if (i === 3) {
// Special case for the blank merged row (4th row, index 3)
// We want to draw all the vertical lines as if it's a regular row
for (let j = 0; j < table.widths.length - 1; j++) {
currentX += table.widths[j];
doc.moveTo(currentX, topY).lineTo(currentX, bottomY).stroke();
}
}
else {
// Draw internal lines for other merged rows
for (const cell of rowData.cols) {
let mergedWidth = 0;
for (let j = cell.startCol; j <= cell.endCol; j++) {
mergedWidth += table.widths[j];
}
currentX += mergedWidth;
// Don't draw a vertical line if it's the very last column's right border
if (cell.endCol < table.widths.length - 1) {
doc.moveTo(currentX, topY).lineTo(currentX, bottomY).stroke();
}
}
}
}
return { height: headerBlockHeight, endY: cursorY, lines: headerBlockLines };
}
// Helper function to draw the total row without borders or vertical lines
function drawTotalRow(doc, table, totalValue, cursorY, initialX) {
// const totalRowDataArray = ['', '', '', 'Total', totalValue.toFixed(2), ''];
const totalRowDataArray = ['', '', '', 'Total', formatNumber(totalValue), ''];
const totalVerticalPadding = table.cellTopPadding + table.cellBottomPadding;
const totalHorizontalPadding = table.cellHorizontalPadding * 2;
const totalTableWidth = table.widths.reduce((a, b) => a + b, 0);
let totalRowHeight = 0;
let maxTotalHeightInRow = 0;
for (let j = 0; j < totalRowDataArray.length; j++) {
const textOptions = {
width: table.widths[j] - totalHorizontalPadding,
lineGap: 3
};
const h = doc.heightOfString(totalRowDataArray[j], textOptions);
if (h > maxTotalHeightInRow) {
maxTotalHeightInRow = h;
}
}
totalRowHeight = maxTotalHeightInRow + totalVerticalPadding;
const linesInTotalRow = Math.ceil(maxTotalHeightInRow / doc.heightOfString('a', { lineGap: 3 }));
const startY = cursorY + table.totalRowPaddingTop;
// Draw the text only, without any rectangles or lines
let currentX = initialX;
doc.fontSize(table.fontSize);
for (let j = 0; j < totalRowDataArray.length; j++) {
doc.fillColor(table.bodyFontColor);
doc.text(totalRowDataArray[j], currentX + table.cellHorizontalPadding, startY + table.cellTopPadding, {
width: table.widths[j] - totalHorizontalPadding,
lineGap: 3
});
currentX += table.widths[j];
}
return { height: totalRowHeight + table.totalRowPaddingTop, lines: linesInTotalRow, endY: startY + totalRowHeight };
}
// --- Function to manually draw a single data row ---
function drawDataRow(doc, table, rowData, cursorY, initialX, isEvenRow) {
const totalVerticalPadding = table.cellTopPadding + table.cellBottomPadding;
const totalHorizontalPadding = table.cellHorizontalPadding * 2;
const totalTableWidth = table.widths.reduce((a, b) => a + b, 0);
let rowHeight = 0;
let maxHeightInRow = 0;
const rowDataArray = [
rowData.itemNo,
rowData.description,
rowData.noOfPieces,
rowData.weight,
formatNumber(rowData.itemValue), // formatted Item Value
rowData.countryOfOrigin
];
for (let j = 0; j < rowDataArray.length; j++) {
const textOptions = { width: table.widths[j] - totalHorizontalPadding, lineGap: 3 };
const h = doc.heightOfString(rowDataArray[j] || '', textOptions);
if (h > maxHeightInRow) {
maxHeightInRow = h;
}
}
rowHeight = maxHeightInRow + totalVerticalPadding;
const linesInRow = Math.ceil(maxHeightInRow / doc.heightOfString('a', { lineGap: 3 }));
// Draw the data row
const fillColor = isEvenRow ? table.alternatingRowColor : table.rowColor;
doc.rect(initialX, cursorY, totalTableWidth, rowHeight).fill(fillColor); // Fill the entire row rectangle
let currentX = initialX;
doc.fontSize(table.fontSize);
// for (let j = 0; j < rowDataArray.length; j++) {
// doc.fillColor(table.bodyFontColor);
// doc.text(rowDataArray[j], currentX + table.cellHorizontalPadding, cursorY + table.cellTopPadding, {
// width: table.widths[j] - totalHorizontalPadding,
// lineGap: 3
// });
// currentX += table.widths[j];
// }
for (let j = 0; j < rowDataArray.length; j++) {
doc.fillColor(table.bodyFontColor);
const alignRight = (j === 2 || j === 4); // right-align No of Pieces and Item Value
doc.text(rowDataArray[j], currentX + table.cellHorizontalPadding, cursorY + table.cellTopPadding, {
width: table.widths[j] - totalHorizontalPadding,
lineGap: 3,
align: alignRight ? 'right' : 'left'
});
currentX += table.widths[j];
}
return { height: rowHeight, lines: linesInRow, endY: cursorY + rowHeight };
}
// --- Function to manually draw the table from JSON data ---
function drawTable(doc, table, jsonData, headerData) {
let cursorY = table.y;
const initialX = table.x;
let continuationPageNo = 0;
const totalTableWidth = table.widths.reduce((a, b) => a + b, 0);
let rowStart = 0;
while (rowStart < jsonData.length) {
let linesUsed = 0;
let rowsOnPage: any = [];
let currentY = cursorY;
let currentPageTotal = 0;
// Draw fixed header block and count its visual lines
const fixedHeaderData = getFixedHeaderData({ ...headerData, contPageNo: String(continuationPageNo) });
const fixedHeaderInfo = drawFixedHeader(doc, table, fixedHeaderData, currentY, initialX, totalTableWidth);
currentY = fixedHeaderInfo.endY;
linesUsed += fixedHeaderInfo.lines;
// Collect data rows that can fit in remaining lines
for (let i = rowStart; i < jsonData.length; i++) {
const rowData = jsonData[i];
const isEvenRow = i % 2 === 0;
const { height, lines } = drawDataRow(doc, table, rowData, -1000, initialX, isEvenRow); // simulate row height
const remainingRows = jsonData.length - i - 1;
const willBeLastPage = remainingRows === 0;
const extraLines = 1 + (willBeLastPage ? 1 : 0);
if (linesUsed + lines + extraLines + 1 > maxLinesPerPage) break; // +1 for total row
rowsOnPage.push({ data: rowData, isEven: isEvenRow, height, lines });
linesUsed += lines;
rowStart++;
currentPageTotal += parseFloat(rowData.itemValue);
}
// Render data rows
let horizontalLineYCoords: number[] = [currentY];
for (const row of rowsOnPage as any) {
drawDataRow(doc, table, row.data, currentY, initialX, row.isEven);
currentY += row.height;
horizontalLineYCoords.push(currentY);
}
// Draw horizontal lines for data rows
for (const yCoord of horizontalLineYCoords) {
drawHorizontalLine(doc, initialX, yCoord, totalTableWidth, table.lineColor, table.lineWidth);
}
// Draw vertical lines for data block
drawVerticalLines(doc, table, horizontalLineYCoords[0], currentY);
// Draw total row
const totalRowInfo = drawTotalRow(doc, table, currentPageTotal, currentY, initialX);
currentY = totalRowInfo.endY;
const isLastDataPage = rowStart >= jsonData.length;
if (isLastDataPage) {
const endMessage = '***** End of list, No item can be added *****';
const fontSize = 10;
const verticalGap = 10;
doc.fontSize(fontSize).font('Helvetica-Bold');
const textWidth = doc.widthOfString(endMessage);
const centerX = (doc.page.width - textWidth) / 2;
const endY = currentY + verticalGap;
doc.text(endMessage, centerX, endY);
currentY = endY + doc.heightOfString(endMessage); // update Y if needed
}
// Add new page if more data remains
if (rowStart < jsonData.length) {
doc.addPage();
continuationPageNo++;
cursorY = doc.page.margins.top;
}
}
return continuationPageNo + 1;
}
// Draw the custom table and get the total page count
const totalPages = drawTable(doc, table, jsonData, headerData);
// Check if the total number of pages is even and add a "VOID" page if it is
if (totalPages % 2 === 0) {
doc.addPage();
const voidText = 'VOID';
doc.fontSize(14).font('Helvetica');
const textWidth = doc.widthOfString(voidText);
const centerX = (doc.page.width - textWidth) / 2;
doc.text(voidText, centerX, doc.page.margins.top);
}
// Finalize the PDF file
doc.end();
const generalistFilePath = path.join(__dirname, '../../../public/carnet-pdf', 'p2.pdf')
doc.pipe(fs.createWriteStream(generalistFilePath));
console.log('PDF created successfully!');
return "p2 done";
}
export const generateGeneralistPDF2 = async (carnetNumber: string) => {
const pageWidth = doc.page.width;
const seeAttachedText = 'See Attached';
const seeAttachedWidth = doc.widthOfString(seeAttachedText);
const uniqueNoText = `Carnet No: ${carnetNumber}`;
const uniqueNoWidth = doc.widthOfString(uniqueNoText);
// Center position for "See Attached"
const centerX = pageWidth / 2;
const seeAttachedX = centerX - (seeAttachedWidth / 2);
// Position "Unique No" next to "See Attached"
const spacing = 90; // gap between texts
const uniqueNoX = seeAttachedX + seeAttachedWidth + spacing;
// Vertically align both (e.g., 100 from top)
const y = 100;
// If unique number will overflow, adjust its X position to stay in same line
let adjustedUniqueNoX = uniqueNoX;
if (uniqueNoX + uniqueNoWidth > pageWidth - 50) {
adjustedUniqueNoX = pageWidth - uniqueNoWidth - 50;
}
doc.text(seeAttachedText, seeAttachedX, y);
doc.text(uniqueNoText, adjustedUniqueNoX, y);
// Finalize PDF
doc.end();
const generalistFilePath = path.join(__dirname, '../../../public/carnet-pdf', 'p2.pdf')
doc.pipe(fs.createWriteStream(generalistFilePath));
return "p2 done"
}
export const generateGreenCoverPDF = async () => {
const templatePath = path.join(__dirname, '../../..', 'public/pdf-templates', '2GeneralList.pdf');
const existingPdfBytes = fs.readFileSync(templatePath);
const pdfDoc = await pdfl.load(existingPdfBytes);
const form = pdfDoc.getForm();
let fields = form.getFields();
}
export const generateFinalPDF = async (inputFiles: string[], outputFile: string) => {
const merger = new PDFMerger();
for (const fileName of inputFiles) {
const filePath = path.join(__dirname, '../../../public/carnet-pdf', fileName);
console.log(`📄 Adding: ${filePath}`);
try {
await merger.add(filePath);
} catch (err) {
console.error(`❌ Failed to add PDF: ${fileName}`, err);
}
}
const outputPath = path.join(__dirname, '../../../public/carnet-pdf', outputFile);
try {
await merger.save(outputPath);
console.log(`✅ Merged PDF saved to ${outputPath}`);
} catch (err) {
console.error(`❌ Failed to save merged PDF`, err);
throw new Error("Failed to save merged PDF");
}
};
export const deleteFilesAsync = async (relativeFilePaths: string[]): Promise<void> => {
for (const relativeFilePath of relativeFilePaths) {
const filePath = path.join(__dirname, '../../../public/carnet-pdf', relativeFilePath);
if (fs.existsSync(filePath)) {
try {
await fsPromises.unlink(filePath);
console.log(`🗑️ Deleted: ${filePath}`);
} catch (err) {
console.error(`❌ Error deleting file: ${filePath}`, err);
}
} else {
console.warn(`⚠️ File not found: ${filePath}`);
}
}
};