(Objective-C) Send HTML Email with Embedded Image Loaded from Memory

Demonstrates how to compose an HTML email with an embedded image where the image data is loaded directly from memory.

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#import <CkoFileAccess.h>
#import <CkoMailMan.h>
#import <CkoEmail.h>
#import <NSString.h>
#import <CkoStringBuilder.h>

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// First load image data into memory.
// This example loads image data from a file.
// However, your application could get the image data from any other source, such as
// from a database.
CkoFileAccess *fac = [[CkoFileAccess alloc] init];
NSData imageBytes;
imageBytes = [fac ReadEntireFile: @"qa_data/jpg/starfish.jpg"];

// The mailman object is used for sending and receiving email.
CkoMailMan *mailman = [[CkoMailMan alloc] init];

// Use your SMTP server hostname.  This example uses office365, but it could be any SMTP server..
mailman.SmtpHost = @"outlook.office365.com";
mailman.SmtpPort = [NSNumber numberWithInt:587];
mailman.StartTLS = YES;

// Set the SMTP login/password
mailman.SmtpUsername = @"OFFICE365-SMTP-LOGIN";
mailman.SmtpPassword = @"OFFICE365-SMTP-PASSWORD";

// Create a new email object
CkoEmail *email = [[CkoEmail alloc] init];
email.Subject = @"HTML Email with Image Loaded from In-Memory Bytes";
email.From = @"Chilkat Support <my-office365-user@mydomain.com>";
[email AddTo: @"Chilkat Support" emailAddress: @"support@chilkatsoft.com"];

NSString *contentIdStarfish = [email AddRelatedData: @"starfish.jpg" in: imageBytes];
if (email.LastMethodSuccess != YES) {
    NSLog(@"%@",email.LastErrorText);
    return;
}

// The src attribute for the image tag is set to the contentIdStarfish:
CkoStringBuilder *sbHtml = [[CkoStringBuilder alloc] init];
[sbHtml Append: @"<html><body><p>This is an HTML email with an embedded image.</p>"];
[sbHtml Append: @"<p><img src=\"cid:CONTENT_ID_STARFISH\" /></p></body></html>"];
int numReplacements = [[sbHtml Replace: @"CONTENT_ID_STARFISH" replacement: contentIdStarfish] intValue];

[email SetHtmlBody: [sbHtml GetAsString]];

BOOL success = [mailman SendEmail: email];
if (success != YES) {
    NSLog(@"%@",mailman.LastErrorText);
}
else {
    NSLog(@"%@",@"Mail Sent!");
}