(Node.js) Get Contents of a T-Mobile Text Message (as Email)

How to get the contents of an email that originated as a T-Mobile SMS text.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // First, for the purpose of understanding the structure of the MIME,
    // let's load the MIME into a Chilkat MIME object and examine the MIME structure.
    var mime = new chilkat.Mime();

    var success = mime.LoadMimeFile("qa_data/eml/TMobileTextMsg.eml");
    // Show the MIME structure in text format (as opposed to XML format).
    console.log(mime.GetStructure("text"));

    // The MIME structure for our test email looks like this:
    // multipart/related
    //     text/html
    //     text/plain
    //     image/gif
    //     image/gif
    //     image/gif

    // The HTML part is not considered a "related item" because the related items
    // are defined as being related to the HTML part.  Therefore, we should always
    // expect to find a text/html part under a multipart/related.  The HTML parts
    // is simply the HTML body, and the other parts are the related items.
    // If the text/plain part was to be considered as an alternative body,
    // then a properly structured email would include a multipart/alternative structure.

    var email = new chilkat.Email();

    success = email.LoadEml("qa_data/eml/TMobileTextMsg.eml");

    // We should see 4 related items.
    console.log("Num Related Items = " + email.NumRelatedItems);
    // There should be 0 attachments.  
    console.log("Num Attachments = " + email.NumAttachments);

    // Find the indices of the text/plain related part, and the text/html related part
    var i = 0;
    var numRelatedItems = email.NumRelatedItems;
    var sbContentType = new chilkat.StringBuilder();
    while (i < numRelatedItems) {
        sbContentType.Append(email.GetRelatedContentType(i));
        console.log(i + ": " + sbContentType.GetAsString());
        if (sbContentType.ContentsEqual("text/plain",false)) {
            console.log("---- text/plain part:");
            console.log(email.GetRelatedString(i,"utf-8"));
        }

        sbContentType.Clear();
        i = i+1;
    }


}

chilkatExample();