59 lines
1.7 KiB
Ruby
59 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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module Banzai
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# Extract references to issuables from multiple documents
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# This populates RequestStore cache used in Banzai::ReferenceParser::IssueParser
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# and Banzai::ReferenceParser::MergeRequestParser
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# Populating the cache should happen before processing documents one-by-one
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# so we can avoid N+1 queries problem
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class IssuableExtractor
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attr_reader :context
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ISSUE_REFERENCE_TYPE = '@data-reference-type="issue"'.freeze
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MERGE_REQUEST_REFERENCE_TYPE = '@data-reference-type="merge_request"'.freeze
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# context - An instance of Banzai::RenderContext.
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def initialize(context)
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@context = context
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end
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# Returns Hash in the form { node => issuable_instance }
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def extract(documents)
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nodes = documents.flat_map do |document|
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document.xpath(query)
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end
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# The project or group for the issuable might be pending for deletion!
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# Filter them out because we don't care about them.
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issuables_for_nodes(nodes).select { |node, issuable| issuable.project || issuable.group }
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end
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private
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def issuables_for_nodes(nodes)
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parsers.each_with_object({}) do |parser, result|
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result.merge!(parser.records_for_nodes(nodes))
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end
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end
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def parsers
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[
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Banzai::ReferenceParser::IssueParser.new(context),
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Banzai::ReferenceParser::MergeRequestParser.new(context)
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]
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end
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def query
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%Q(
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descendant-or-self::a[contains(concat(" ", @class, " "), " gfm ")]
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[#{reference_types.join(' or ')}]
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)
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end
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def reference_types
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[ISSUE_REFERENCE_TYPE, MERGE_REQUEST_REFERENCE_TYPE]
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end
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end
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end
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