Class: JsonParser

Inherits:
Object
  • Object
show all
Defined in:
lib/json_parser.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, auto_write = true) ⇒ JsonParser

Returns a new instance of JsonParser.



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# File 'lib/json_parser.rb', line 7

def initialize path, auto_write = true
  @path = path
  @db = open @path
  @auto_write = auto_write
end

Instance Attribute Details

#db ⇒ Object (readonly)

Returns the value of attribute db.



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# File 'lib/json_parser.rb', line 5

def db
  @db
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/json_parser.rb', line 5

def path
  @path
end

Instance Method Details

#delete(key, symbols = nil) ⇒ Object 



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# File 'lib/json_parser.rb', line 66

def delete key, symbols = nil
  parse(symbols, nil, key)
end

#exist? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/json_parser.rb', line 62

def exist?
  @db.empty?
end

#on(symbol, value) ⇒ Object 



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# File 'lib/json_parser.rb', line 13

def on symbol, value
  unless @db.include?(symbol.to_s)
    parse symbol, value
  end
end

#on_handler(symbol, handler, &block) ⇒ Object 



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# File 'lib/json_parser.rb', line 19

def on_handler symbol, handler, &block
  unless @db.include?(symbol.to_s)
    block.call(false) if block
    value = handler.call()
    if value
      parse symbol, value
      block.call(true, value) if block
    end
  end
end

#parse(symbols, value = nil, delete = nil) ⇒ Object 



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# File 'lib/json_parser.rb', line 30

def parse symbols, value = nil, delete = nil
  symbols_join = ""
  if symbols.class.name == "Array"
    symbols_join = symbols.join("\"][\"")
  else
    symbols_join = symbols.to_s
  end
  symbols_join = "[\"#{symbols_join}\"]"

  unless delete
    unless value
      eval "@db#{ symbols_join }"
    else
      eval "@db#{ symbols_join } = value"
      
      if @auto_write
        write @path, @db
      end
    end
  else
    if symbols
      eval "@db#{ symbols_join }.delete('#{delete}')"
    else
      eval "@db.delete('#{delete}')"
    end

    if @auto_write
      write @path, @db
    end
  end
end