Redirect multiple domains to https only - .htaccess

Question

I have three domains:
example.com
example.net
domain2.example
I want all domains (www/non-www/HTTPS/non-HTTPS traffic) to redirect to https://www.example.com.
I know I need to redirect example.net and domain2.example (www/non-www and HTTPS) first to example.com and then https://www.example.com (SSL certificate is only for example.com and www.example.com).
.htaccess (whole file):
RewriteEngine on
RewriteBase /
RewriteCond !{HTTPS} off
RewriteCond %{HTTP_HOST} ^(www\.)?example.com [NC]
RewriteRule ^/?$ "https\:\/\/www\.example\.com" [R=301,L]
RewriteCond !{HTTPS} off
RewriteCond %{HTTP_HOST} ^(www\.)?example.net [NC,OR]
RewriteCond %{HTTP_HOST} ^(www\.)?domain2.example [NC]
RewriteRule ^/?$ "http\:\/\/www\.domain1\.com" [R=301,L]
RewriteCond !{HTTPS} on
RewriteCond %{HTTP_HOST} ^(www\.)?example.com [NC]
RewriteRule ^/?$ "https\:\/\/www\.example\.com" [R=301,L]
RewriteCond !{HTTPS} on
RewriteCond %{HTTP_HOST} ^(www\.)?example.net [NC,OR]
RewriteCond %{HTTP_HOST} ^(www\.)?domain2.example [NC]
RewriteRule ^/?$ "http\:\/\/www\.example\.com" [R=301,L]
# disable directory listing
Options -Indexes
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
Only example.com redirect rules seems to be working rigth, but example.net and domain2.example redirects does not work. Is this possible to get work?

Answer 1

This should be enough:
RewriteCond !{HTTPS} on [OR]
RewriteCond %{HTTP_HOST} !^www\.example\.com$
RewriteRule ^ https://www.example.com%{REQUEST_URI} [R=301,L]
Keep in mind that in order to respond to https:// requests for other domains, you need to have the certificate for that domain name (you need it even if you only want to do the redirect!).