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# frozen_string_literal: true
module Gitlab
module Ci
module Pipeline
module Expression
class Statement
StatementError = Class.new(Expression::ExpressionError)
GRAMMAR = [
%w[variable],
%w[variable equals string],
%w[variable equals variable],
%w[variable equals null],
%w[string equals variable],
%w[null equals variable],
%w[variable matches pattern]
].freeze
def initialize(statement, variables = {})
@lexer = Expression::Lexer.new(statement)
@variables = variables.with_indifferent_access
end
def parse_tree
raise StatementError if @lexer.lexemes.empty?
unless GRAMMAR.find { |syntax| syntax == @lexer.lexemes }
raise StatementError, _('Unknown pipeline expression!')
end
Expression::Parser.new(@lexer.tokens).tree
end
def evaluate
parse_tree.evaluate(@variables.to_h)
end
def truthful?
evaluate.present?
rescue Expression::ExpressionError
false
end
def valid?
parse_tree.is_a?(Lexeme::Base)
rescue Expression::ExpressionError
false
end
end
end
end
end
end
|
