Pastable version of model validations

<pre class='prettyprint' language='ruby'>class Newalert

def new_alert_validations(params)
     errors = []
     
      
    if params['keywords'].blank? 
      errors  &lt;&lt; &quot;keywords can't be blank.&quot;
    end
    
    if params['link'].blank? 
      errors  &lt;&lt; &quot;Website can't be blank.&quot;
    end
    
    unless params['link'].strip =~ /^(http|https):\/\/[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(([0-9]{1,5})?\/.*)?$/ix
      errors  &lt;&lt; &quot;Invalid format of website.&quot;
    end
     
     
    unless params['email_box'] =~  /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i
      errors  &lt;&lt; &quot;Invalid format of email.&quot;
    end
     
    if params['email_chbox'].blank? and params['text_chbox'].blank?
      errors  &lt;&lt; &quot;Please select either Email or Text message checkbox .&quot;
    end
     
     
    
     return errors 
  end

end</pre>
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Pastable version of model validations