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Contents
module Lookbook
class DataResolver < Service
MATCHER = /(?!.*)/
MATCH_INDEX = 1
attr_reader :eval_context, :base_dir, :file, :fallback
def initialize(input, eval_context: nil, fail_silently: false, base_dir: Rails.root, file: nil, fallback: nil)
@input = input.to_s
@eval_context = eval_context
@fail_silently = fail_silently
@fallback = fallback
@base_dir = base_dir.to_s
@file = file.to_s
end
def call
resolve extract(@input)
rescue => exception
Lookbook.logger.debug "Data resolution failed. (Input: '#{@input}')"
@fail_silently ? fallback : raise(exception)
end
def self.resolveable?(input)
input.to_s.match?(self::MATCHER)
end
protected
def extract(input)
match_data = input.match(self.class::MATCHER)
if match_data.nil?
raise_error "Invalid data '#{input}'"
else
match_data[self.class::MATCH_INDEX]
end
end
def resolve(input)
raise ParserError.new "OptionsResolver must be subclassed with a :resolve method defined"
end
def evaluate(input, fallback = @fallback)
if evaluatable?
begin
proc {
eval_context.instance_eval(input.to_s)
}.call
rescue => exception
raise_error "Could not evaluate statement (#{exception.message})", exception
end
else
Lookbook.logger.debug "Data cannot be evaluated (Input: '#{input}')"
fallback
end
end
def raise_error(message, original_exception = nil)
raise ParserError.new message, original: original_exception, scope: "resolvers"
end
private
def evaluatable?
eval_context.present?
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems