160 lines
5.2 KiB
Ruby
160 lines
5.2 KiB
Ruby
module Banzai
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module Filter
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# Issues, Merge Requests, Snippets, Commits and Commit Ranges share
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# similar functionality in reference filtering.
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class AbstractReferenceFilter < ReferenceFilter
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include CrossProjectReference
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def self.object_class
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# Implement in child class
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# Example: MergeRequest
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end
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def self.object_name
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object_class.name.underscore
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end
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def self.object_sym
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object_name.to_sym
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end
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def self.data_reference
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"data-#{object_name.dasherize}"
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end
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# Public: Find references in text (like `!123` for merge requests)
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#
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# AnyReferenceFilter.references_in(text) do |match, id, project_ref, matches|
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# object = find_object(project_ref, id)
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# "<a href=...>#{object.to_reference}</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, the Integer referenced object ID, an optional String
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# of the external project reference, and all of the matchdata.
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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, pattern = object_class.reference_pattern)
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text.gsub(pattern) do |match|
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yield match, $~[object_sym].to_i, $~[:project], $~
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end
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end
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def self.referenced_by(node)
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{ object_sym => LazyReference.new(object_class, node.attr(data_reference)) }
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end
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def object_class
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self.class.object_class
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end
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def object_sym
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self.class.object_sym
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end
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def references_in(*args, &block)
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self.class.references_in(*args, &block)
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end
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def find_object(project, id)
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# Implement in child class
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# Example: project.merge_requests.find
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end
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def url_for_object(object, project)
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# Implement in child class
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# Example: project_merge_request_url
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end
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def call
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if object_class.reference_pattern
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# `#123`
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replace_text_nodes_matching(object_class.reference_pattern) do |content|
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object_link_filter(content, object_class.reference_pattern)
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end
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# `[Issue](#123)`, which is turned into
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# `<a href="#123">Issue</a>`
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replace_link_nodes_with_href(object_class.reference_pattern) do |link, text|
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object_link_filter(link, object_class.reference_pattern, link_text: text)
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end
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end
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if object_class.link_reference_pattern
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# `http://gitlab.example.com/namespace/project/issues/123`, which is turned into
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# `<a href="http://gitlab.example.com/namespace/project/issues/123">http://gitlab.example.com/namespace/project/issues/123</a>`
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replace_link_nodes_with_text(object_class.link_reference_pattern) do |text|
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object_link_filter(text, object_class.link_reference_pattern)
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end
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# `[Issue](http://gitlab.example.com/namespace/project/issues/123)`, which is turned into
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# `<a href="http://gitlab.example.com/namespace/project/issues/123">Issue</a>`
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replace_link_nodes_with_href(object_class.link_reference_pattern) do |link, text|
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object_link_filter(link, object_class.link_reference_pattern, link_text: text)
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end
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end
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end
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# Replace references (like `!123` for merge requests) in text with links
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# to the referenced object's details page.
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#
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# text - String text to replace references in.
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# pattern - Reference pattern to match against.
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# link_text - Original content of the link being replaced.
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#
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# Returns a String with references replaced with links. All links
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# have `gfm` and `gfm-OBJECT_NAME` class names attached for styling.
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def object_link_filter(text, pattern, link_text: nil)
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references_in(text, pattern) do |match, id, project_ref, matches|
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project = project_from_ref(project_ref)
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if project && object = find_object(project, id)
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title = object_link_title(object)
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klass = reference_class(object_sym)
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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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object_sym => object.id
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)
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url = matches[:url] if matches.names.include?("url")
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url ||= url_for_object(object, project)
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text = link_text || object_link_text(object, matches)
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%(<a href="#{url}" #{data}
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title="#{escape_once(title)}"
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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 object_link_text_extras(object, matches)
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extras = []
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if matches.names.include?("anchor") && matches[:anchor] && matches[:anchor] =~ /\A\#note_(\d+)\z/
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extras << "comment #{$1}"
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end
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extras
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end
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def object_link_title(object)
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"#{object_class.name.titleize}: #{object.title}"
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end
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def object_link_text(object, matches)
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text = object.reference_link_text(context[:project])
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extras = object_link_text_extras(object, matches)
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text += " (#{extras.join(", ")})" if extras.any?
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text
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end
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end
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end
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end
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