Class: PlatformosCheck::UnusedAssign

Inherits:
LiquidCheck show all
Defined in:
lib/platformos_check/checks/unused_assign.rb

Overview

Checks unused assign x = … %

Defined Under Namespace

Classes: TemplateInfo

Constant Summary

Constants inherited from Check

Check::CATEGORIES, Check::SEVERITIES, Check::SEVERITY_VALUES

Instance Attribute Summary

Attributes inherited from Check

#ignored_patterns, #offenses, #options, #platformos_app

Instance Method Summary collapse

Methods included from ChecksTracking

#inherited

Methods included from ParsingHelpers

#outside_of_strings

Methods inherited from Check

#==, #add_offense, all, can_disable, #can_disable?, categories, #categories, category, #code_name, doc, #doc, docs_url, #ignore!, #ignored?, #severity, severity, #severity=, #severity_value, severity_value, single_file, #single_file?, #to_s, #whole_platformos_app?

Methods included from JsonHelpers

#format_json_parse_error, #pretty_json

Constructor Details

#initialize ⇒ UnusedAssign

Returns a new instance of UnusedAssign.



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# File 'lib/platformos_check/checks/unused_assign.rb', line 24

def initialize
  @templates = {}
end

Instance Method Details

#on_assign(node) ⇒ Object 



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# File 'lib/platformos_check/checks/unused_assign.rb', line 32

def on_assign(node)
  @templates[node.app_file.name].assign_nodes[node.value.to] = node
end

#on_document(node) ⇒ Object 



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# File 'lib/platformos_check/checks/unused_assign.rb', line 28

def on_document(node)
  @templates[node.app_file.name] = TemplateInfo.new(Set.new, {}, Set.new)
end

#on_end ⇒ Object 



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# File 'lib/platformos_check/checks/unused_assign.rb', line 67

def on_end
  @templates.each_pair do |_, info|
    used = info.collect_used_assigns(@templates)
    info.assign_nodes.each_pair do |name, node|
      next if used.include?(name)

      add_offense("`#{name}` is never used", node:) do |corrector|
        case node.type_name
        when :graphql
          offset = node.markup.match(/^graphql\s+/)[0].size

          corrector.insert_before(
            node,
            '_',
            (node.start_index + offset)...(node.start_index + offset)
          )
        when :function
          offset = node.markup.match(/^function\s+/)[0].size

          corrector.insert_before(
            node,
            '_',
            (node.start_index + offset)...(node.start_index + offset)
          )
        when :parse_json
          # noop
        else
          corrector.remove(node)
        end
      end
    end
  end
end

#on_function(node) ⇒ Object 



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# File 'lib/platformos_check/checks/unused_assign.rb', line 40

def on_function(node)
  return if node.value.to.start_with?('_')

  @templates[node.app_file.name].assign_nodes[node.value.to] = node
end

#on_graphql(node) ⇒ Object 



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# File 'lib/platformos_check/checks/unused_assign.rb', line 46

def on_graphql(node)
  return if node.value.to.start_with?('_')

  @templates[node.app_file.name].assign_nodes[node.value.to] = node
end

#on_include(node) ⇒ Object 



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# File 'lib/platformos_check/checks/unused_assign.rb', line 52

def on_include(node)
  return unless node.value.template_name_expr.is_a?(String)

  @templates[node.app_file.name].includes << node.value.template_name_expr
end

#on_parse_json(node) ⇒ Object 



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# File 'lib/platformos_check/checks/unused_assign.rb', line 36

def on_parse_json(node)
  @templates[node.app_file.name].assign_nodes[node.value.to] = node
end

#on_variable_lookup(node) ⇒ Object 



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# File 'lib/platformos_check/checks/unused_assign.rb', line 58

def on_variable_lookup(node)
  @templates[node.app_file.name].used_assigns << case node.value.name
                                                 when Liquid::VariableLookup
                                                   node.value.name.name
                                                 else
                                                   node.value.name
                                                 end
end