From af1d8ead09733456626c359b1d5a1408c57edd57 Mon Sep 17 00:00:00 2001
From: Zee Spencer <50284+zspencer@users.noreply.github.com>
Date: Thu, 20 Jul 2023 12:36:11 -0700
Subject: [PATCH] `Journal`: `Entries` link to their `Keywords`

- https://github.com/zinc-collective/convene/issues/1566
- https://github.com/zinc-collective/convene/issues/1662
---
 app/furniture/journal/entry.rb                 |  4 ++++
 app/furniture/journal/entry_component.rb       | 15 +++++++++++++--
 app/furniture/journal/keyword.rb               |  6 +++++-
 spec/furniture/journal/entry_component_spec.rb |  1 +
 4 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/app/furniture/journal/entry.rb b/app/furniture/journal/entry.rb
index f75c5f84a..44747e6d3 100644
--- a/app/furniture/journal/entry.rb
+++ b/app/furniture/journal/entry.rb
@@ -45,6 +45,10 @@ def keywords=(keywords)
       super(keywords.uniq)
     end
 
+    def keywords
+      journal.keywords.search(*super)
+    end
+
     def to_param
       slug
     end
diff --git a/app/furniture/journal/entry_component.rb b/app/furniture/journal/entry_component.rb
index 1afba665d..f0ce06c83 100644
--- a/app/furniture/journal/entry_component.rb
+++ b/app/furniture/journal/entry_component.rb
@@ -9,10 +9,21 @@ def initialize(*args, entry:, **kwargs)
     end
 
     def body_html
-      render_markdown(entry.body)
+      postprocess(render_markdown(entry.body))
     end
 
-    def published_at
+    private def postprocess(text)
+      entry.keywords.map do |keyword|
+        search = keyword.canonical_with_aliases.sort.reverse.join("|")
+        text.gsub!(/\#(#{search})/i) do |match|
+          link_to(match, keyword.location)
+        end
+      end
+
+      text
+    end
+
+    private def published_at
       entry.published_at.to_fs(:long_ordinal)
     end
 
diff --git a/app/furniture/journal/keyword.rb b/app/furniture/journal/keyword.rb
index e0f8048cc..b207dede0 100644
--- a/app/furniture/journal/keyword.rb
+++ b/app/furniture/journal/keyword.rb
@@ -13,7 +13,11 @@ class Keyword < ApplicationRecord
     end)
 
     def entries
-      journal.entries.matching_keywords([canonical_keyword] + (aliases.presence || []))
+      journal.entries.matching_keywords(canonical_with_aliases)
+    end
+
+    def canonical_with_aliases
+      [canonical_keyword] + (aliases.presence || [])
     end
 
     def to_param
diff --git a/spec/furniture/journal/entry_component_spec.rb b/spec/furniture/journal/entry_component_spec.rb
index 3a12ec994..504575487 100644
--- a/spec/furniture/journal/entry_component_spec.rb
+++ b/spec/furniture/journal/entry_component_spec.rb
@@ -7,4 +7,5 @@
   let(:entry) { create(:journal_entry, body: "https://www.google.com @zee@weirder.earth #GoodTimes") }
 
   it { is_expected.to have_link("https://www.google.com", href: "https://www.google.com") }
+  it { is_expected.to have_link("#GoodTimes", href: polymorphic_path(entry.journal.keywords.find_by(canonical_keyword: "GoodTimes").location)) }
 end