245 lines
6.8 KiB
Ruby
245 lines
6.8 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_name ||= object_class.name.underscore
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end
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def self.object_sym
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@object_sym ||= object_name.to_sym
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end
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def self.data_reference
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@data_reference ||= "data-#{object_name.dasherize}"
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end
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def self.object_class_title
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@object_title ||= object_class.name.titleize
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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 object_class_title
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self.class.object_class_title
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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 find_object_cached(project, id)
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if RequestStore.active?
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cache = find_objects_cache[object_class][project.id]
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get_or_set_cache(cache, id) { find_object(project, id) }
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else
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find_object(project, id)
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end
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end
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def project_from_ref_cache(ref)
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if RequestStore.active?
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cache = project_refs_cache
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get_or_set_cache(cache, ref) { project_from_ref(ref) }
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else
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project_from_ref(ref)
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end
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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 url_for_object_cached(object, project)
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if RequestStore.active?
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cache = url_for_object_cache[object_class][project.id]
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get_or_set_cache(cache, object) { url_for_object(object, project) }
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else
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url_for_object(object, project)
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end
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end
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def call
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return doc if project.nil?
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ref_pattern = object_class.reference_pattern
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link_pattern = object_class.link_reference_pattern
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each_node do |node|
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if text_node?(node) && ref_pattern
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replace_text_when_pattern_matches(node, ref_pattern) do |content|
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object_link_filter(content, ref_pattern)
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end
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elsif element_node?(node)
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yield_valid_link(node) do |link, text|
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if ref_pattern && link =~ /\A#{ref_pattern}\z/
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replace_link_node_with_href(node, link) do
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object_link_filter(link, ref_pattern, link_text: text)
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end
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next
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end
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next unless link_pattern
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if link == text && text =~ /\A#{link_pattern}/
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replace_link_node_with_text(node, link) do
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object_link_filter(text, link_pattern)
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end
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next
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end
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if link =~ /\A#{link_pattern}\z/
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replace_link_node_with_href(node, link) do
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object_link_filter(link, link_pattern, link_text: text)
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end
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next
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end
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end
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end
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end
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doc
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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_cache(project_ref)
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if project && object = find_object_cached(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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if matches.names.include?("url") && matches[:url]
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url = matches[:url]
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else
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url = url_for_object_cached(object, project)
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end
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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_title}: #{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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private
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def project_refs_cache
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RequestStore[:banzai_project_refs] ||= {}
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end
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def find_objects_cache
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RequestStore[:banzai_find_objects_cache] ||= Hash.new do |hash, key|
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hash[key] = Hash.new { |h, k| h[k] = {} }
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end
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end
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def url_for_object_cache
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RequestStore[:banzai_url_for_object] ||= Hash.new do |hash, key|
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hash[key] = Hash.new { |h, k| h[k] = {} }
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end
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end
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def get_or_set_cache(cache, key)
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if cache.key?(key)
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cache[key]
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else
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cache[key] = yield
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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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