bsky descriptions with newlines

spec/helpers/domain/bluesky_post_helper_spec.rb

@@ -34,6 +34,151 @@ RSpec.describe Domain::BlueskyPostHelper, type: :helper do
       end
     end
 
+    context "with newlines in text" do
+      let(:text_with_newlines) { "Line 1\nLine 2\nLine 3" }
+      let(:facets) do
+        [
+          {
+            "$type" => "app.bsky.richtext.facet",
+            "index" => {
+              "byteStart" => 0,
+              "byteEnd" => 6,
+            },
+            "features" => [
+              {
+                "$type" => "app.bsky.richtext.facet#mention",
+                "did" => "did:plc:alice123",
+              },
+            ],
+          },
+        ]
+      end
+
+      it "converts newlines to <br /> tags in text parts" do
+        expect(helper).to receive(:render).with(
+          partial: "domain/has_description_html/external_link",
+          locals:
+            hash_including(
+              link_text: "Line 1",
+              url: "https://bsky.app/profile/did:plc:alice123",
+            ),
+        ).and_return("[external user link]")
+
+        result = helper.render_bsky_post_facets(text_with_newlines, facets)
+        expect(result).to eq("[external user link]<br />Line 2<br />Line 3")
+      end
+
+      context "with newlines in text without facets" do
+        it "keeps newlines unchanged when no facets are present" do
+          result = helper.render_bsky_post_facets(text_with_newlines, [])
+          expect(result).to eq("Line 1\nLine 2\nLine 3")
+        end
+      end
+
+      context "with newlines around facets" do
+        let(:text_with_newlines_around_facets) do
+          "Before\n@alice.bsky.social\nAfter"
+        end
+        let(:facets) do
+          [
+            {
+              "$type" => "app.bsky.richtext.facet",
+              "index" => {
+                "byteStart" => 7,
+                "byteEnd" => 25,
+              },
+              "features" => [
+                {
+                  "$type" => "app.bsky.richtext.facet#mention",
+                  "did" => "did:plc:alice123",
+                },
+              ],
+            },
+          ]
+        end
+
+        it "converts newlines to <br /> tags while preserving facets" do
+          expect(helper).to receive(:render).with(
+            partial: "domain/has_description_html/external_link",
+            locals:
+              hash_including(
+                link_text: "@alice.bsky.social",
+                url: "https://bsky.app/profile/did:plc:alice123",
+              ),
+          ).and_return("[external user link]")
+
+          result =
+            helper.render_bsky_post_facets(
+              text_with_newlines_around_facets,
+              facets,
+            )
+          expect(result).to eq("Before<br />[external user link]<br />After")
+        end
+      end
+
+      context "with multiple text parts containing newlines" do
+        let(:text_with_multiple_newlines) do
+          "Start\n@alice.bsky.social\nMiddle\n@bob.bsky.social\nEnd"
+        end
+        let(:facets) do
+          [
+            {
+              "$type" => "app.bsky.richtext.facet",
+              "index" => {
+                "byteStart" => 6,
+                "byteEnd" => 24,
+              },
+              "features" => [
+                {
+                  "$type" => "app.bsky.richtext.facet#mention",
+                  "did" => "did:plc:alice123",
+                },
+              ],
+            },
+            {
+              "$type" => "app.bsky.richtext.facet",
+              "index" => {
+                "byteStart" => 32,
+                "byteEnd" => 48,
+              },
+              "features" => [
+                {
+                  "$type" => "app.bsky.richtext.facet#mention",
+                  "did" => "did:plc:bob123",
+                },
+              ],
+            },
+          ]
+        end
+
+        it "converts newlines in all text parts to <br /> tags" do
+          expect(helper).to receive(:render).with(
+            partial: "domain/has_description_html/external_link",
+            locals:
+              hash_including(
+                link_text: "@alice.bsky.social",
+                url: "https://bsky.app/profile/did:plc:alice123",
+              ),
+          ).and_return("[alice link]")
+
+          expect(helper).to receive(:render).with(
+            partial: "domain/has_description_html/external_link",
+            locals:
+              hash_including(
+                link_text: "@bob.bsky.social",
+                url: "https://bsky.app/profile/did:plc:bob123",
+              ),
+          ).and_return("[bob link]")
+
+          result =
+            helper.render_bsky_post_facets(text_with_multiple_newlines, facets)
+          expect(result).to eq(
+            "Start<br />[alice link]<br />Middle<br />[bob link]<br />End",
+          )
+        end
+      end
+    end
+
     context "with mention facets" do
       let(:mentioned_user) do
         create(