94 lines
2.9 KiB
Ruby
94 lines
2.9 KiB
Ruby
module Banzai
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module Filter
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# HTML filter that replaces label references with links.
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class LabelReferenceFilter < ReferenceFilter
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# Public: Find label references in text
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#
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# LabelReferenceFilter.references_in(text) do |match, id, name|
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# "<a href=...>#{Label.find(id)}</a>"
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# end
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#
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# text - String text to search.
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#
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# Yields the String match, an optional Integer label ID, and an optional
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# String label name.
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#
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# Returns a String replaced with the return of the block.
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def self.references_in(text)
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text.gsub(Label.reference_pattern) do |match|
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yield match, $~[:label_id].to_i, $~[:label_name]
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end
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end
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def self.referenced_by(node)
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{ label: LazyReference.new(Label, node.attr("data-label")) }
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end
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def call
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replace_text_nodes_matching(Label.reference_pattern) do |content|
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label_link_filter(content)
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end
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replace_link_nodes_with_href(Label.reference_pattern) do |link, text|
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label_link_filter(link, link_text: text)
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end
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end
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# Replace label references in text with links to the label specified.
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#
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# text - String text to replace references in.
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#
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# Returns a String with label references replaced with links. All links
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# have `gfm` and `gfm-label` class names attached for styling.
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def label_link_filter(text, link_text: nil)
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project = context[:project]
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self.class.references_in(text) do |match, id, name|
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params = label_params(id, name)
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if label = project.labels.find_by(params)
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url = url_for_label(project, label)
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klass = reference_class(:label)
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data = data_attribute(
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original: link_text || match,
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project: project.id,
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label: label.id
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)
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text = link_text || render_colored_label(label)
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%(<a href="#{url}" #{data}
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class="#{klass}">#{escape_once(text)}</a>)
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else
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match
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end
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end
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end
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def url_for_label(project, label)
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h = Gitlab::Application.routes.url_helpers
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h.namespace_project_issues_url( project.namespace, project, label_name: label.name,
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only_path: context[:only_path])
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end
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def render_colored_label(label)
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LabelsHelper.render_colored_label(label)
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end
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# Parameters to pass to `Label.find_by` based on the given arguments
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#
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# id - Integer ID to pass. If present, returns {id: id}
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# name - String name to pass. If `id` is absent, finds by name without
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# surrounding quotes.
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#
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# Returns a Hash.
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def label_params(id, name)
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if name
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{ name: name.tr('"', '') }
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else
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{ id: 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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