sinatra-helper-params.rb

# uri_params
#
# Turn URI parameters like uri[0], uri[1]... into an array of values
# and ones like account[id], account[name]... into a hash
# This needs to be called inside of a "post" or "get" command. It doesn't work when placed inside the "before" (?)
def uri_params_fix!
  p = params
  
  p.each_pair do |key_with_index, value| 
    
    next unless (match = key_with_index.to_s.match(/(.+)\[['"]?([\w\-]+)['"]?\]/))     
    key = match[1].to_s       # The first match will be the key name (ie "uri")
    index = match[2]            # And the second match is the index (ie "0" or "name")
    
    # This index is numeric (for an array)
    if index[/\d+/]
      # This is ugly but the idea is to preserve an existing value. For example, 
      # uri=something and uri[0]=another become uri=['something','another']
      p[key] = (p[key]) ? [p[key]] : [] unless p[key].is_a? Array
      p[key] << value
      
    # and this index is a string (for a hash)
    else       
      # Again, ugly but it's for preserving an existing value
      p[key] = (p[key]) ? {p[key] => p[key]} : {} unless p[key].is_a? Hash
      p[key][index.to_s] = value
    end
    
    # Remove the [1] or [name] from the params
    p.delete(key_with_index)
  end 
  params = p
end