--- a/src/lib/Post.luan	Wed Jun 29 00:04:09 2022 -0600
+++ b/src/lib/Post.luan	Thu Jun 30 00:02:28 2022 -0600
@@ -1,10 +1,13 @@
 local Luan = require "luan:Luan.luan"
 local error = Luan.error
+local ipairs = Luan.ipairs or error()
 local set_metatable = Luan.set_metatable or error()
 local Number = require "luan:Number.luan"
 local long = Number.long or error()
 local Time = require "luan:Time.luan"
 local time_now = Time.now or error()
+local Html = require "luan:Html.luan"
+local html_encode = Html.encode or error()
 local Db = require "site:/lib/Db.luan"
 
 
@@ -14,13 +17,18 @@
 	doc.type == "post" or error "wrong type"
 	return Post.new {
 		id = doc.id
-		subject = doc.subject
 		content = doc.content
 		date = doc.date
 		author_name = doc.post_author_name
 		author_id = doc.post_author_id
+		root_id = doc.post_root_id
+
+		-- root only
+		subject = doc.subject
 		is_root = doc.post_is_root == "true"
-		root_id = doc.post_root_id
+
+		-- replies only
+		parent_id = doc.parent_id
 	}
 end
 
@@ -28,13 +36,18 @@
 	return {
 		type = "post"
 		id = post.id
-		subject = post.subject or error()
 		content = post.content or error()
 		date = post.date or time_now()
 		post_author_name = post.author_name or error()
 		post_author_id = long(post.author_id)
+		post_root_id = post.root_id and long(post.root_id)
+
+		-- root only
+		subject = post.subject
 		post_is_root = post.is_root and "true" or nil
-		post_root_id = post.root_id and long(post.root_id)
+
+		-- replies only
+		parent_id = post.parent_id
 	}
 end
 
@@ -44,6 +57,12 @@
 		local User = require "site:/lib/User.luan"
 		return User.get_by_id(post.author_id)
 	end
+	if key == "subject_html" then
+		return post.subject and html_encode(post.subject)
+	end
+	if key == "root" then
+		return post.is_root and post or Post.get_by_id(post.root_id)
+	end
 	return nil
 end
 
@@ -55,19 +74,33 @@
 		post.id = doc.id
 	end
 
+	function post.reply(author,content)
+		return Db.run_in_transaction( function()
+			local post = Post.new{
+				root_id = post.root_id
+				parent_id = post.id
+				content = content
+				author_name = author.name
+				author_id = author.id
+			}
+			post.save()
+			return post
+		end )
+	end
+
 	set_metatable(post,metatable)
 	return post
 end
 
 function Post.get_by_id(id)
 	local doc = Db.get_document("id:"..id)
-	return doc and Post.from_doc(doc)
+	return doc and from_doc(doc)
 end
 
 function Post.new_thread(author,subject,content)
 	return Db.run_in_transaction( function()
 		local post = Post.new{
-			subject = subject
+			subject = subject or error()
 			content = content
 			author_name = author.name
 			author_id = author.id
@@ -80,4 +113,13 @@
 	end )
 end
 
+function Post.from_docs(docs)
+	local posts = {}
+	for _, doc in ipairs(docs) do
+		local post = from_doc(doc)
+		posts[#posts+1] = post
+	end
+	return posts
+end
+
 return Post