clean up emoji keywords

Rakefile

@@ -12,7 +12,7 @@ require "gemoji"
   medium_dark_skin_tone: ["🏾", "Medium-Dark Skin Tone"],
   dark_skin_tone: ["🏿", "Dark Skin Tone"],
 }.each do |key, (unicode_alias, desc)|
-  Emoji.create(key) do |char|
+  Emoji.create(key.to_s) do |char|
     char.add_unicode_alias unicode_alias
     char.description = desc
   end
@@ -27,22 +27,47 @@ task :rebuild => "build" do
 
   Emoji.all.each do |emoji|
     uuid = SecureRandom.uuid
-    name = [
+    keywords = [emoji.description]
-      emoji.raw,
+
-      emoji.description,
+    keywords.concat(
-      emoji.aliases.map { "\"#{_1}\"" }.join(", "),
+      emoji.aliases
-    ]
+        .map { _1.gsub(?_, " ") }
-    name << "(#{emoji.tags.join(", ")})" unless emoji.tags.empty?
+        .reject { str_match(emoji.description, _1) }
+    )
+    keywords.concat(emoji.tags)
 
     File.write("build/#{emoji.name} [#{uuid}].json", JSON.dump({
       alfredsnippet: {
         snippet: emoji.raw,
         dontautoexpand: true,
         uid: uuid,
-        name: name.join(" "),
+        name: "#{emoji.raw} #{keywords.join(", ")}",
         keyword: emoji.name,
       },
     }))
   end
 end
 task :default => :rebuild
+
+def str_match(a, b)
+  return true if a.gsub(/[^\w]+/, "").downcase.include?(b.gsub(/[^\w]+/, "").downcase)
+  levenshtein(a, b) < 2
+end
+
+def levenshtein(a, b)
+  memo = Hash.new {|h,(a,b)|
+    h[[a,b]] = (->() {
+      return b.length if a.empty?
+      return a.length if b.empty?
+      return h[[a[1..], b[1..]]] if a[0] == b[0]
+
+      1 + [
+        h[[a, b[1..]]],
+        h[[a[1..], b]],
+        h[[a[1..], b[1..]]],
+      ].min
+    }).()
+  }
+
+  memo[[a, b].map(&:downcase)]
+end