Zig

Get the Nth Text Part of a Given Content-Type

Demonstrates the Chilkat Email.GetNthTextPartOfType method, which returns the text content of the Nth non-multipart MIME part matching a Content-Type pattern. The arguments are a zero-based index among the matching parts, the content-type pattern, an inlineOnly flag, and an excludeAttachments flag. This example retrieves the first text/html part.

Background: A MIME message is a tree of parts, and sometimes you want a specific one by its type rather than by walking alternatives or bodies. The content-type pattern can be exact (text/html) or a wildcard (text/*), and the two boolean flags narrow the search — inlineOnly restricts to inline (displayed) parts, and excludeAttachments skips parts marked as attachments — so you can target exactly the text you care about.

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const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // Demonstrates the GetNthTextPartOfType method, which returns the text content of the Nth
    // non-multipart MIME part matching a Content-Type pattern.  The first argument is the zero-based
    // index among matching parts, the second is the Content-Type pattern, the third is inlineOnly, and the fourth is
    // excludeAttachments.

    const email = try chilkat.Email.init();
    defer email.deinit();
    email.setSubject("GetNthTextPartOfType example");

    email.setTextBody("This is the plain-text version.", "text/plain");
    email.addHtmlAlternativeBody("<html><body>This is the HTML version.</body></html>") catch {};

    // Get the first (index 0) part whose content type matches text/html.
    const html_part = try email.getNthTextPartOfType(alloc, 0, "text/html", false, false);
    std.debug.print("First text/html part:\n", .{});
    std.debug.print("{s}\n", .{html_part});
}