Resolve semantic identifiers in wiki reverse-link parser

modules/wikis/app/services/wikis/concerns/update_reverse_inline_wiki_page_links.rb

@@ -32,16 +32,31 @@ module Wikis::Concerns
   module UpdateReverseInlineWikiPageLinks
     extend ActiveSupport::Concern
 
+    # Mirrors the prefix character class of the inline-text macro matcher.
+    # The trailing `(?!\w)` on the semantic branch keeps `#PROJ-1abc` from
+    # matching `#PROJ-1`; the numeric branch deliberately has no trailing
+    # boundary to preserve historic behaviour for inputs like `#13-blubb`.
+    # rubocop:disable Style/RedundantRegexpEscape
+    WP_REF_RE = /
+      (?:[[:space:],~>\#\(\[\-]|^)\#
+      (?:
+        (\d+)
+        |
+        (#{WorkPackage::SemanticIdentifier::SEMANTIC_ID_PATTERN.source})(?!\w)
+      )
+    /x
+    # rubocop:enable Style/RedundantRegexpEscape
+
     def update_reverse_inline_wiki_page_links(wiki_page)
       provider = Wikis::InternalProvider.enabled.first
       return if provider.nil?
 
       Wikis::ReverseInlinePageLink.where(provider:, identifier: wiki_page.id).delete_all
 
-      find_wp_links(wiki_page.text).uniq.each do |wp_id|
-        wp = WorkPackage.find_by(id: wp_id)
-        next if wp.nil?
+      identifiers = find_wp_links(wiki_page.text).uniq
+      return if identifiers.empty?
 
+      WorkPackage.where_display_id_in(identifiers).find_each do |wp|
         Wikis::ReverseInlinePageLink.create!(linkable: wp, provider:, identifier: wiki_page.id)
       end
     end
@@ -51,9 +66,7 @@ def update_reverse_inline_wiki_page_links(wiki_page)
     def find_wp_links(text)
       return [] if text.blank?
 
-      # extracted prefix from lib/open_project/text_formatting/matchers/resource_links_matcher.rb
-      # adding # as additional prefix
-      text.scan(/(?:[[:space:],~>#\(\[\-]|^)#([0-9]+)/) # rubocop:disable Style/RedundantRegexpEscape
+      text.scan(WP_REF_RE).map { |numeric, semantic| numeric || semantic }
     end
   end
 end

modules/wikis/spec/services/wiki_pages/create_service_spec.rb

@@ -179,6 +179,20 @@
     end
   end
 
+  context "when a numeric reference is immediately followed by alphanumeric text" do
+    # The numeric branch of WP_REF_RE has no trailing `(?!\w)` boundary —
+    # historic behaviour matches `#13` inside `#13-blubb` and similar
+    # shapes. Locked here so a future tightening of the boundary can't
+    # silently strip reverse-links from existing wiki content.
+    let(:text) { "Trailing: ##{work_package.id}abc" }
+
+    it "still creates a reverse page link from the numeric prefix" do
+      subject
+
+      expect(reverse_link_finder.count).to eq(1)
+    end
+  end
+
   context "when the internal provider is disabled" do
     let(:internal_provider) { create(:internal_wiki_provider, enabled: false) }
 
@@ -202,4 +216,92 @@
       expect(Wikis::ReverseInlinePageLink.count).to eq(0)
     end
   end
+
+  context "with a semantic-identifier reference",
+          with_flag: { semantic_work_package_ids: true },
+          with_settings: { work_packages_identifier: "semantic" } do
+    let(:project) { create(:project, :semantic) }
+    let(:work_package) do
+      create(:work_package, project:).tap do |wp|
+        wp.allocate_and_register_semantic_id
+        wp.reload
+      end
+    end
+
+    context "when the reference uses the semantic identifier" do
+      let(:text) { "See ##{work_package.identifier} for context." }
+
+      it "creates a reverse page link" do
+        subject
+
+        expect(reverse_link_finder.count).to eq(1)
+      end
+    end
+
+    context "when the semantic reference uses the ## widget syntax" do
+      let(:text) { "Block: ###{work_package.identifier}." }
+
+      it "creates a reverse page link" do
+        subject
+
+        expect(reverse_link_finder.count).to eq(1)
+      end
+    end
+
+    context "when the semantic reference uses the ### widget syntax" do
+      let(:text) { "Detailed: ####{work_package.identifier}." }
+
+      it "creates a reverse page link" do
+        subject
+
+        expect(reverse_link_finder.count).to eq(1)
+      end
+    end
+
+    context "when the project has been renamed and a historical alias is referenced" do
+      let(:text) { "Historical: #OLD-#{work_package.sequence_number}." }
+
+      before do
+        WorkPackageSemanticAlias.create!(work_package:, identifier: "OLD-#{work_package.sequence_number}")
+      end
+
+      it "still creates a reverse page link" do
+        subject
+
+        expect(reverse_link_finder.count).to eq(1)
+      end
+    end
+
+    context "when no work package matches the semantic reference" do
+      let(:text) { "Missing: #GHOST-99." }
+
+      it "does not create a link" do
+        subject
+
+        expect(Wikis::ReverseInlinePageLink.count).to eq(0)
+      end
+    end
+
+    context "when the semantic identifier is followed by an alphanumeric word character" do
+      let(:text) { "Boundary: ##{work_package.identifier}abc." }
+
+      it "does not create a link" do
+        subject
+
+        expect(Wikis::ReverseInlinePageLink.count).to eq(0)
+      end
+    end
+  end
+
+  context "with a semantic-shape reference in classic mode",
+          with_flag: { semantic_work_package_ids: false },
+          with_settings: { work_packages_identifier: "classic" } do
+    let(:text) { "See #PROJ-1 for context." }
+
+    it "does not create a link" do
+      subject
+
+      expect(Wikis::ReverseInlinePageLink.count).to eq(0)
+    end
+  end
 end