Class: Shift::Generator::RubyGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/shift-lang/generator/ruby_generator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ RubyGenerator

Returns a new instance of RubyGenerator.



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 11

def initialize()
	@blocks = []
	@defined_hashes = []
	@has_models = false
	@builder = Shift::ShiftBuilder.new
end

Instance Attribute Details

#builder ⇒ Object

Returns the value of attribute builder.



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 9

def builder
  @builder
end

#defined_hashes ⇒ Object

Returns the value of attribute defined_hashes.



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 9

def defined_hashes
  @defined_hashes
end

#has_models ⇒ Object

Returns the value of attribute has_models.



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 9

def has_models
  @has_models
end

Instance Method Details

#apply_transforms(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 243

def apply_transforms(statement, num_tabs)
	tabs = ""
	if num_tabs > 0
		num_tabs = num_tabs - 1
	end
	num_tabs.times { tabs += "\t" }
	result = ""

	if(@blocks.length > 0)
		if(@blocks[@blocks.length - 1] == num_tabs)
			if (statement.keys[0] != :else_statement)
				t = ""
				@blocks.pop.times { t += "\t" }
				result += t + "end\n"
			end
		end
	end

	if(statement.is_a?(Hash))
		key = statement.keys[0]
		case key
		when :assignment_statement
			result += expression_transform(statement, num_tabs) + "\n"
		when :query
			result += query_transform(statement, num_tabs)
		when :write_statement
			result += write_function_transform(statement, num_tabs) + "\n"
		when :write_file_statement
			result += write_file_function_transform(statement, num_tabs) + "\n"
		when :read_statement
			result += read_statement_transform(statement, num_tabs) 
		when :redirect_statement
			result += redirect_statement_transform(statement, num_tabs)
		when :arithmetic_expression
			result += value_transform(statement, num_tabs)
		when :boolean_expression
			result += value_transform(statement, num_tabs)
		when :if_statement
			result += control_statement_transform(statement, num_tabs) + "\n"
		when :else_statement
			result += tabs + value_transform(statement, num_tabs) + "\n"
		when :for_statement
			@blocks.push(num_tabs)
			result += tabs + value_transform(statement, num_tabs) + "\n"
		when :while_statement
			result += control_statement_transform(statement, num_tabs) + "\n"
		when :int
			integer_casted_expression_transform(statement, num_tabs)
		else
			result += token_transform(statement, num_tabs)	
		end
	else
		if statement.is_a?(Array)
			result += concatenated_string_expression_transform(statement, num_tabs)
		else
			result += statement.to_s
		end
	end
end

#concatenated_string_expression_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 230

def concatenated_string_expression_transform(statement, num_tabs)
	statement = statement.map do | token |
		apply_transforms(token, 0)
	end

	statement.join(" + ")
end

#control_statement_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 192

def control_statement_transform(statement, num_tabs)
	tabs = ""
	num_tabs.times { tabs += "\t" }

	key = statement.keys[0]

	result = ""

	@blocks.push (num_tabs)

	case key
	when :if_statement
		result = tabs + "if " + apply_transforms(statement[:if_statement][:condition], 0) 
	when :while_statement
		result = tabs + "while " + apply_transforms(statement[:while_statement][:condition], 0) 			
	end			

	result
end

#expression_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 83

def expression_transform(statement, num_tabs)
	tabs = ""
	num_tabs.times { tabs += "\t" }
	key = statement.keys[0]
	case key
	when :assignment_statement
		extra = ""
		if(statement[:assignment_statement][:left].keys[0] == :hash_value)
			val = statement[:assignment_statement][:left][:hash_value].to_s
			hash_var = val[0..(val.index('[') - 1)]

			if !@defined_hashes.include?(hash_var)
				@defined_hashes.push hash_var
				extra += tabs + "(" + hash_var + " ||= {})\n"
			end
		end

		left = apply_transforms(statement[:assignment_statement][:left], 0) 
		right = apply_transforms(statement[:assignment_statement][:right], 0) 

		extra + tabs + left.to_s + " = " + right.to_s
	end
end

#get_data(builder) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 18

def get_data(builder)
	@builder = builder
end

#get_data_from_file(file_name) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 22

def get_data_from_file(file_name)
	@builder.get_data_from_file file_name
end

#get_import_statements ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 26

def get_import_statements()
	Shift::Generator::RubyTemplates::IMPORT_SINATRA_STATEMENT + "\n" +
	Shift::Generator::RubyTemplates::IMPORT_MUSTACHE_STATEMENT + "\n" + 
	(@has_models ? (Shift::Generator::RubyTemplates::IMPORT_DATAMAPPER_STATEMENT + "\n\n") : "")
end

#get_model_data ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 32

def get_model_data()
	result = ""

	model_name_template = ERB.new(Shift::Generator::RubyTemplates::MODEL_NAME_TEMPLATE)
			

	@builder.models.each do | model |
		model_name = model.name
		result += model_name_template.result(binding) + "\n"
		result += ("\t" + Shift::Generator::RubyTemplates::DATAMAPPER_INCLUDE_STATEMENT + "\n\n" )
		result += ("\t" + "property :id, Serial\n")

		model.attributes.each do | attribute |
			if (attribute[:type] == "string")
				result += ("\t" + "property :" + attribute[:name] + ", " + RubyTemplates::DB_STRING_PROPERTY + "\n") 
			elsif (attribute[:type] == "integer")
					result += ("\t" + "property :" + attribute[:name] + ", " + RubyTemplates::DB_INTEGER_PROPERTY + "\n")	
			end
		end
		result += "end\n"
	end

	result
end

#get_utility_functions ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 57

def get_utility_functions()
	Shift::Generator::RubyTemplates::UTILITY_FUNCTIONS + "\n\n" + (@has_models ? (Shift::Generator::RubyTemplates::CONFIGURE_BLOCK + "\n\n") : "")
end

#integer_casted_expression_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 238

def integer_casted_expression_transform(statement, num_tabs)
	statement.delete(:int)
	"(" + apply_transforms(statement, 0) + ").to_i"
end

#query_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 107

def query_transform(statement, num_tabs)
	tabs = ""
	num_tabs.times { tabs += "\t" }
	statement = statement[:query]
	case statement[:operation].to_s
	when "all"
		(statement[:model_name].to_s + ".all")
	when "new"
		(statement[:model_name].to_s + ".new")
	when "find"
		attribute = statement[:condition][:attribute].to_s
		value = apply_transforms(statement[:condition][:value], 0)
		operator = ""
		case statement[:condition][:operator].to_s.gsub!(" ", "")
		when "<="
			operator = ".lte"
		when ">="
			operator = ".gte"
		when "<"
			operator = ".lt"
		when ">"
			operator = ".gt"
		when "!="
			operator = ".not"
		end
		(statement[:model_name].to_s + ".all(:" + attribute + operator + " => " + value + ")")
	when "find_by_id"
		id = apply_transforms(statement[:item_id], 0)
		(statement[:model_name].to_s + ".get(params[:" + id + "])" )
	when "update"
		tabs + (statement[:model_name].to_s + ".save\n")
	when "delete"
		tabs + (statement[:model_name].to_s + ".destroy\n")								
	end
end

#read_statement_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 170

def read_statement_transform(statement, num_tabs)
	read_param = apply_transforms(statement[:read_statement][:read_statement_param], 0)
	if ((read_param[0] == "'") || (read_param[0] == '"'))
		read_param = read_param[1..(read_param.length - 2)]
	end
	read_statement = "params[:" + read_param + "]" 
end

#redirect_statement_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 178

def redirect_statement_transform(statement, num_tabs)
	tabs = ""
	num_tabs.times { tabs += "\t" }
	redirect_param = apply_transforms(statement[:redirect_statement][:redirect_statement_param], 0)
	redirect_statement = tabs + "redirect(" + redirect_param + ")\n"
end

#token_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 61

def token_transform(statement, num_tabs)
	tabs = ""
	num_tabs.times { tabs += "\t" }
	key = statement.keys[0]
	case key
	when :identifier
		statement[:identifier].to_s
	when :object_value 
		if (statement[:object_value].to_s.split(".")[1] == "save")
			tabs + statement[:object_value].to_s + "\n"
		else
			tabs + statement[:object_value].to_s
		end
	when :hash_value
		statement[:hash_value].to_s
	when :string
		statement[:string].to_s
	else
		statement.to_s
	end
end

#url_transform(url) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 212

def url_transform(url) 
	if(url.is_a?(Array))
		result_url = ""
		
		url.each do | token |
			case token.keys[0]
			when :url_token
				result_url += "/" + token[:url_token].to_s
			when :url_variable
				result_url += "/:" + token[:url_variable].to_s
			end			
		end
		result_url
	else
		url.to_s
	end
end

#value_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 185

def value_transform(statement, num_tabs)
	tabs = ""
	num_tabs.times { tabs += "\t" }
	key = statement.keys[0]
	statement[key].to_s
end

#write_data ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 305

def write_data()
	if (@builder.models.length != 0)
		@has_models = true
	end

	result = get_import_statements + get_model_data + get_utility_functions

	@builder.handlers.each do | handlers |
		@defined_hashes = []

		result += handlers.method + " '" + url_transform(handlers.url) + "' do\n"

		handlers.handler.each do | statement |
			result += apply_transforms(statement[:statement], statement[:num_tabs]) 
		end 

		@blocks.each do | t |
			tabs = ""
			t.times { tabs += "\t" }
			result += tabs + "end" + "\n"
		end
		@blocks = []	
		result += "end\n\n"

	end
	result
end

#write_file_function_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 154

def write_file_function_transform(statement, num_tabs)
	tabs = ""
	num_tabs.times { tabs += "\t" }
	
	write_file_template = ERB.new(Shift::Generator::RubyTemplates::WRITE_FILE_TEMPLATE)
	
	if(statement[:write_file_statement].is_a?(Array))
		file_name = apply_transforms(statement[:write_file_statement][0][:file_name], 0)
		template_values = apply_transforms(statement[:write_file_statement][1][:template_values], 0)
	else
		file_name = apply_transforms(statement[:write_file_statement][:file_name], 0)
	end
	
	tabs + write_file_template.result(binding)  
end

#write_function_transform(statement, num_tabs) ⇒ Object 



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# File 'lib/shift-lang/generator/ruby_generator.rb', line 143

def write_function_transform(statement, num_tabs)
	tabs = ""
	num_tabs.times { tabs += "\t" }

	write_data_template = ERB.new(Shift::Generator::RubyTemplates::WRITE_DATA_TEMPLATE)

	write_data = apply_transforms(statement[:write_statement][:write_statement_param], 0)
	tabs + write_data_template.result(binding) + "\n" +
	tabs + Shift::Generator::RubyTemplates::WRITE_RESPONSE_TEMPLATE
end