.htaccess rewrite domain and subdomain to directory and subdirectory - .htaccess

Question

I'm trying to use my .htaccess file to point domains/subdomains to directories/subdirectories without changing the url in the browser.
Examples of the incoming url and the directory it should point to:
domain1.com/* -> /domain1.com/www/*
foo.domain1.com/* -> /domain1.com/foo/*
bar.domain1.com/* -> /domain1.com/bar/*
domain2.com/* -> /domain2.com/www/*
foo.domain2.com/* -> /domain2.com/foo/*
bar.domain2.com/* -> /domain2.com/bar/*
Here's my current attempt that is continually appending the directory/subdirectory to the url:
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^(?:([^.]+)\.)?([^.]+)\.([^.]+)$ [NC]
RewriteCond %{REQUEST_URI} !^/%2\.%3/%1/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /%2.%3/%1/$1 [L,NE,P,QSA,R]

Answer 1

Why so complicated? The following should satisfy all requirements you listed:
RewriteCond %{HTTP_HOST} ^([^.]+)\.[^.]+$
RewriteRule ^ /www%{REQUEST_URI} [L]
RewriteCond %{HTTP_HOST} ^([^.]+)\.([^.]+)\.[^.]+$
RewriteRule ^ /%1%{REQUEST_URI} [L]
Have a try yourself at made with love

Answer 2

It took a little work, but that to the help of the first response, I was able to get everything working eventually.
Here's my final solution to this issue:
## Turn the rewrite engine on to allow for url mapping to work
RewriteEngine on
## Don't require a trailing "/" for directories
DirectorySlash Off
## If subdomain was missing, redirect into the "www" subdirectory
# If no %{REQUEST_FILENAME} was provided, redirect to the "www" subdirectory
RewriteCond %{HTTP_HOST} ^([^.]+)\.([^.]+)$ [NC]
RewriteRule ^$ /%2.%3/www/ [END,NC]
# If a %{REQUEST_FILENAME} was provided, redirect to the directory/file in the "www" subdirectory
RewriteCond %{HTTP_HOST} ^([^.]+)\.([^.]+)$ [NC]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ /%2.%3/www/$1 [END,NC,QSA]
# If subdomain was given, redirect into the given subdirectory
# If no %{REQUEST_FILENAME} was provided, redirect to the given subdirectory
RewriteCond %{HTTP_HOST} ^([^.]+)\.([^.]+)\.([^.]+)$ [NC]
RewriteRule ^$ /%2.%3/%1/ [END,NC]
# If a %{REQUEST_FILENAME} was provided, redirect to the directory/file in the given subdirectory
RewriteCond %{HTTP_HOST} ^([^.]+)\.([^.]+)\.([^.]+)$ [NC]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ /%2.%3/%1/$1 [END,NC,QSA]