83 lines
2.4 KiB
Ruby
83 lines
2.4 KiB
Ruby
module Banzai
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# Class for removing Markdown references a certain user is not allowed to
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# view.
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class Redactor
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attr_reader :user, :project
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# project - A Project to use for redacting links.
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# user - The currently logged in user (if any).
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def initialize(project, user = nil)
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@project = project
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@user = user
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end
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# Redacts the references in the given Array of documents.
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#
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# This method modifies the given documents in-place.
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#
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# documents - A list of HTML documents containing references to redact.
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#
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# Returns the documents passed as the first argument.
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def redact(documents)
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all_document_nodes = document_nodes(documents)
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redact_document_nodes(all_document_nodes)
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end
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# Redacts the given node documents
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#
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# data - An Array of a Hashes mapping an HTML document to nodes to redact.
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def redact_document_nodes(all_document_nodes)
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all_nodes = all_document_nodes.map { |x| x[:nodes] }.flatten
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visible = nodes_visible_to_user(all_nodes)
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metadata = []
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all_document_nodes.each do |entry|
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nodes_for_document = entry[:nodes]
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doc_data = { document: entry[:document], visible_reference_count: nodes_for_document.count }
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metadata << doc_data
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nodes_for_document.each do |node|
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next if visible.include?(node)
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doc_data[:visible_reference_count] -= 1
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# The reference should be replaced by the original link's content,
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# which is not always the same as the rendered one.
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content = node.attr('data-original') || node.inner_html
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node.replace(content)
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end
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end
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metadata
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end
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# Returns the nodes visible to the current user.
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#
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# nodes - The input nodes to check.
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#
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# Returns a new Array containing the visible nodes.
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def nodes_visible_to_user(nodes)
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per_type = Hash.new { |h, k| h[k] = [] }
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visible = Set.new
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nodes.each do |node|
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per_type[node.attr('data-reference-type')] << node
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end
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per_type.each do |type, nodes|
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parser = Banzai::ReferenceParser[type].new(project, user)
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visible.merge(parser.nodes_visible_to_user(user, nodes))
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end
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visible
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end
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def document_nodes(documents)
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documents.map do |document|
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{ document: document, nodes: Querying.css(document, 'a.gfm[data-reference-type]') }
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end
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end
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end
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end
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