Class: Gm::Notepad::InputHandlers::QueryTableNamesHandler

Inherits:
DefaultHandler
  • Object
show all
Defined in:
lib/gm/notepad/input_handlers/query_table_names_handler.rb

Constant Summary collapse

QUERY_TABLE_NAMES_PREFIX = 
'+'.freeze
WITH_GREP_REGEXP = 
%r{(?<declaration>\/(?<grep>[^\/]+)/)}

Instance Attribute Summary collapse

Attributes inherited from DefaultHandler

#expand_line, #input, #table_registry, #to_filesystem, #to_interactive, #to_output

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from DefaultHandler

build_if_handled, #each_line_with_parameters, #initialize

Constructor Details

This class inherits a constructor from Gm::Notepad::InputHandlers::DefaultHandler

Instance Attribute Details

#grep ⇒ Object

Returns the value of attribute grep.



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# File 'lib/gm/notepad/input_handlers/query_table_names_handler.rb', line 31

def grep
  @grep
end

Class Method Details

.handles?(input:) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gm/notepad/input_handlers/query_table_names_handler.rb', line 8

def self.handles?(input:)
  # Does not have the table prefix
  return false unless input[0] == QUERY_TABLE_NAMES_PREFIX
  # It is only the table prefix
  return true if input == QUERY_TABLE_NAMES_PREFIX
  # It is querying all tables by way of grep
  return true if input[0..1] == "#{QUERY_TABLE_NAMES_PREFIX}/"
  false
end

Instance Method Details

#after_initialize! ⇒ Object 



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# File 'lib/gm/notepad/input_handlers/query_table_names_handler.rb', line 19

def after_initialize!
  self.expand_line = false
  self.to_output = false
  self.to_interactive = true

  line = input[1..-1]
  if match = WITH_GREP_REGEXP.match(line)
    line = line.sub(match[:declaration], '')
    self.grep = match[:grep]
  end
end

#lines ⇒ Object 



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# File 'lib/gm/notepad/input_handlers/query_table_names_handler.rb', line 33

def lines
  table_names = table_registry.table_names
  return table_names unless grep
  table_names.grep(%r{#{grep}})
end