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Contents
require 'pickle/parser/matchers'
module Pickle
class Parser
include Matchers
attr_reader :config
def initialize(options = {})
@config = options[:config] || raise(ArgumentError, "Parser.new requires a :config")
end
# given a string like 'foo: "bar", bar: "baz"' returns {"foo" => "bar", "bar" => "baz"}
def parse_fields(fields)
if fields.blank?
{}
elsif fields =~ /^#{match_fields}$/
fields.scan(/(#{match_field})(?:,|$)/).inject({}) do |m, match|
m.merge(parse_field(match[0]))
end
else
raise ArgumentError, "The fields string is not in the correct format.\n\n'#{fields}' did not match: #{match_fields}"
end
end
# given a string like 'foo: expr' returns {key => value}
def parse_field(field)
if field =~ /^#{capture_key_and_value_in_field}$/
{ $1 => eval($2) }
else
raise ArgumentError, "The field argument is not in the correct format.\n\n'#{field}' did not match: #{match_field}"
end
end
# returns really underscored name
def canonical(str)
str.to_s.underscore.gsub(' ','_').gsub('/','_')
end
# return [factory_name, name or integer index]
def parse_model(model_name)
apply_mappings!(model_name)
if /#{capture_index} #{capture_factory}$/ =~ model_name
[canonical($2), parse_index($1)]
elsif /#{capture_factory}#{capture_name_in_label}?$/ =~ model_name
[canonical($1), canonical($2)]
end
end
def parse_index(index)
case index
when nil, '', 'last' then -1
when /#{capture_number_in_ordinal}/ then $1.to_i - 1
when 'first' then 0
end
end
private
def apply_mappings!(string)
config.mappings.each do |mapping|
string.sub! /^#{mapping.search}$/, mapping.replacement
end
end
end
end
Version data entries
15 entries across 15 versions & 2 rubygems