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117 lines
4.1 KiB
117 lines
4.1 KiB
#-- encoding: UTF-8
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#-- copyright
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# OpenProject is an open source project management software.
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# Copyright (C) 2012-2020 the OpenProject GmbH
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License version 3.
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#
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# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
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# Copyright (C) 2006-2017 Jean-Philippe Lang
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# Copyright (C) 2010-2013 the ChiliProject Team
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# See docs/COPYRIGHT.rdoc for more details.
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#++
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module API
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module Utilities
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class ResourceLinkParser
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# N.B. valid characters for URL path segments as of
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# http://tools.ietf.org/html/rfc3986#section-3.3
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SEGMENT_CHARACTER = '(\w|[-~!$&\'\(\)*+\.,:;=@]|%[0-9A-Fa-f]{2})'.freeze
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RESOURCE_REGEX =
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"/api/v(?<version>\\d)/(?<namespace>[\\w\/]+)/(?<id>#{SEGMENT_CHARACTER}+)\\z".freeze
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SO_REGEX = "/api/v(?<version>\\d)/string_objects/?\\?value=(?<id>\\w*).*\\z".freeze
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class << self
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def parse(resource_link)
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# string objects have a quite different format from the usual resources (query-parameter)
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# we therefore have a specific regex to deal with them and a generic one for all others
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parse_string_object(resource_link) || parse_resource(resource_link)
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end
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def parse_id(resource_link,
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property:,
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expected_version: nil,
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expected_namespace: nil)
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raise ArgumentError unless resource_link
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resource = parse(resource_link)
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if resource
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version_valid = matches_expectation?(expected_version, resource[:version])
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namespace_valid = matches_expectation?(expected_namespace, resource[:namespace])
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end
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unless resource && version_valid && namespace_valid
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expected_link = make_expected_link(expected_version, expected_namespace)
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fail ::API::Errors::InvalidResourceLink.new(property, expected_link, resource_link)
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end
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resource[:id]
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end
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private
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def parse_resource(resource_link)
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match = resource_matcher.match(resource_link)
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return nil unless match
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{
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version: match[:version],
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namespace: match[:namespace],
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id: ::URI.unescape(match[:id])
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}
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end
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def parse_string_object(resource_link)
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match = string_object_matcher.match(resource_link)
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return nil unless match
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{
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version: match[:version],
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namespace: 'string_objects',
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id: ::URI.unescape(match[:id])
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}
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end
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def resource_matcher
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@resource_matcher ||= Regexp.compile(RESOURCE_REGEX)
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end
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def string_object_matcher
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@string_object_matcher ||= Regexp.compile(SO_REGEX)
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end
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# returns whether expectation and actual are identical
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# will always be true if there is no expectation (nil)
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def matches_expectation?(expected, actual)
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expected.nil? || Array(expected).any? { |e| e.to_s == actual }
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end
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def make_expected_link(version, namespaces)
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version = "v#{version}" || ':apiVersion'
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namespaces = Array(namespaces || ':resource')
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namespaces.map { |namespace| "/api/#{version}/#{namespace}/:id" }
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end
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end
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end
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end
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end
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