Finish post updates

app/commands/posts/update.rb

@@ -2,23 +2,68 @@ module Adamantium
   module Commands
     module Posts
       class Update < Command
-        include Deps["repos.post_repo", "renderers.markdown"]
+        include Deps[
+          "repos.post_repo",
+          "renderers.markdown",
+          "commands.posts.add_syndication_source"
+        ]
 
         def call(params:)
           slug = URI(params[:url]).path.split("/").last
           post = post_repo.fetch!(slug)
 
           if params.key? :replace
-            post_repo.update(post.id, {
-              content: markdown.call(content: params[:replace][:content].first)
-            })
+            content = params[:replace].delete(:content).first
+            name = params[:replace].delete(:name)
+
+            attrs_to_replace = {}
+            attrs_to_replace[:name] = name if name
+            attrs_to_replace[:content] = markdown.call(content: content) if content
+
+            post_repo.update(post.id, attrs_to_replace)
           end
 
           if params.key? :add
-            post_repo.tag_post(post_id: post.id, tags: params[:add][:category])
+            attrs_to_add = {}
+
+            syndication = params[:add].delete(:syndication).first
+            tags = params[:add].delete(:category)
+            content = params[:add].delete(:content).first
+            name = params[:add].delete(:name)
+
+            attrs_to_add[:name] = name if post.name.empty?
+            attrs_to_add[:content] = markdown.call(content: content) if post.content.empty?
+
+            params[:add].keys.each_with_object(attrs_to_add) do |attr, memo|
+              memo[attr] = params[:add][attr].first if post.fetch(attr, nil).nil?
+            end
+
+            post_repo.update(post.id, attrs_to_add) unless attrs_to_add.empty?
+
+            post_repo.tag_post(post_id: post.id, tags: tags) if tags && !tags.empty?
+            add_syndication_source.call(post.id, "", syndication) if syndication && !syndication.empty?
           end
 
           if params.key? :delete
+            if params[:delete].is_a? Hash
+              tags = params[:delete][:category]
+              tags&.each do |tag|
+                post_repo.remove_tag(post_id: post.id, tag: tag)
+              end
+            elsif params[:delete].is_a? Array
+              if params[:delete].delete("category")
+                post.tags.each do |tag|
+                  post_repo.remove_tag(post_id: post.id, tag: tag.label)
+                end
+              end
+
+              attrs = {}
+              params[:delete].each do |attr|
+                attrs[attr.to_sym] = nil
+              end
+
+              post_repo.update(post.id, attrs) unless attrs.empty?
+            end
           end
         end
       end