Get Pdf Text Content Line Based

 

const pdfParse = require("pdf-parse"); 

* Reads the text content from a specified or latest downloaded

PDF file.

 *

 * @param {string|null} [fileName=null] - The name of the PDF file.

If null, the latest downloaded file will be used.

 * @param {number|null} [lineToCheck=null] - The line number in the

PDF content to retrieve (1-based index). If null, all lines will

be returned.

 * @returns {Promise<string|string[]>} - The text content of

the specified line or all lines if lineToCheck is not provided.

 */

async function getPdfTextContentLineBased(fileName = null,

                lineToCheck = null) {

    // Define the download directory path

    const downloadDir = CONSTANTS.FILE.FILE_PATH;

    let pdfFilePath;

    if (fileName !== null) {

        // Use the provided filename to construct the file path

        pdfFilePath = `${downloadDir}/${fileName}`;

        console.log(`Reading content from the specified file:

        ${fileName}`);

    } else {

        // Get the latest downloaded file name

        const latestDownloadedFileName =

                await this.getLatestDownloadedFileName();

        // Construct the full path of the latest downloaded PDF file

        pdfFilePath = `${downloadDir}/${latestDownloadedFileName}`;

        console.log(

            `Reading content from the latest downloaded file:

            ${latestDownloadedFileName}`

        );

    }

    // Read the PDF file

    const dataBuffer = fs.readFileSync(pdfFilePath);

    // Parse the PDF and extract text

    const data = await pdfParse(dataBuffer);

    // Split text into lines

    const lines = data.text.split("\n");

    // Print all lines of the PDF text content

    console.log(`Content of the file ${fileName ||

                    "latest downloaded PDF"}:`);

    console.table(

        lines.map((line, index) => ({ Line: index + 1,

                        Content: line.trim() }))

    );

    // Return text based on the specified line or all lines

if lineToCheck is not provided

    if (lineToCheck !== null) {

        if (lineToCheck < 1 || lineToCheck > lines.length) {

            console.warn(`Line number ${lineToCheck} is out of

                                           range.`);

            return ""; // Return an empty string if

the line number is out of range

        }

        return lines[lineToCheck - 1].trim(); // Return the

specified line

    }

    return lines.map((line) => line.trim()); // Return all lines

}