Class: FixtureFox::Parser

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file, lines, schema: nil) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/fixture_fox/parser.rb', line 10

def initialize(file, lines, schema: nil)
  @file = file
  @lines = lines
  @schema = schema || "public"
  @anchor_files = []
end

Instance Attribute Details

#anchor_files ⇒ Object (readonly)

Name of external anchor files from @anchors directive



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# File 'lib/fixture_fox/parser.rb', line 8

def anchor_files
  @anchor_files
end

#ast ⇒ Object (readonly)

Returns the value of attribute ast.



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# File 'lib/fixture_fox/parser.rb', line 7

def ast
  @ast
end

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'lib/fixture_fox/parser.rb', line 6

def file
  @file
end

Instance Method Details

#call(ast = nil) ⇒ Object 



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# File 'lib/fixture_fox/parser.rb', line 17

def call(ast = nil)
  @ast = ast || Ast.new(file)

  # Current schema. The schema is initialized with a synthetic Ident token
  # because the #analyzer needs a token to emit an error message if the
  # public schema doesn't exist
  schema = Ident.new(file, 1, peek.initial_indent, 1, @schema)

  # Parse
  get_line
  while line
    case line
      when DirectiveLine
        case line.directive.value
          when "schema"
            schema = line.argument
            get_line
          when "include"
            parse_included_file(line.argument.value)
            get_line
          when "anchors" # TODO: Remove. Replaced by a command line option
            @anchor_files << line.argument.value
            get_line
        end

      when Line
        if line.root_table? && line.empty
          table = AstTable.new(@ast, schema, line.ident)
          get_line
        elsif line.root_table?
          peek && peek.element? or line.error("Table definition expected")
          table = AstTable.new(@ast, schema, line.ident)
          get_line
          parse_elements(table)
        elsif line.root_record?
          peek && peek.indent > 0 or line.error("Record definition expected")
          # The tokenizer recognizes root records as fields (where the
          # table name is tokenized as a Value - ie. a text). The following
          # recreates the table name as a Token and also embeds the record
          # in an AstTable. This effectively transforms a root-level record
          # definition into a single-row table definition
#             table_ident = Ident.new(
#                 file, line.value.lineno, line.initial_indent, line.value.pos, line.value.value)
          name = PgGraph.inflector.record_type2table(line.value.value)
          table_ident = Ident.new(
              file, line.value.lineno, line.initial_indent, line.value.pos, name)
          table = AstTable.new(@ast, schema, table_ident)
          record = AstRecordElement.new(table, AnchorToken.of_ident(line.ident))
          get_line
          parse_members(record, line.indent)
        else
          line.error("Table or record definition expected")
        end
      else
        raise "Oops"
      end
  end

  @ast
end