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(ns datalayer
(:require redis
tags)
(:use clojure.contrib.sql
clojure.contrib.json.write
clojure.contrib.json.read
config
jedis
message
user
utils))
;;;; Message lookup
(defn recent-posts-query [user-id]
(format "
SELECT u.user_id, u.nick, u.avatar,
m.content, m.message_id%s
FROM users u
LEFT JOIN messages m on m.message_id =
(SELECT message_id FROM messages
WHERE user_id = u.user_id
AND is_image
AND room_id IN (SELECT room_id from rooms where admin_only = false)
ORDER BY created_on desc LIMIT 1)
WHERE u.user_id = ANY(?)"
(if user-id
(format
",
EXISTS (SELECT 1 FROM tags
WHERE tag = 'favorite' AND user_id = %s AND message_id = m.message_id) AS favorited"
user-id)
", false AS favorited")))
(defn recent-posts-nick-query [user-id]
(format "
SELECT u.user_id, u.nick, u.avatar,
m.content, m.message_id%s
FROM users u
LEFT JOIN messages m on m.message_id =
(SELECT message_id FROM messages
WHERE user_id = u.user_id
AND is_image
AND room_id IN (SELECT room_id from rooms where admin_only = false)
ORDER BY created_on desc LIMIT 1)
WHERE u.nick = ANY(?)"
(if user-id
(format
",
EXISTS (SELECT 1 FROM tags
WHERE tag = 'favorite' AND user_id = %s AND message_id = m.message_id) AS favorited"
user-id)
", false AS favorited")))
(defn lookup-recent-posts [user-tag-id user-ids]
(do-select [(recent-posts-query user-tag-id)
(sql-array "int" user-ids)]))
(defn lookup-recent-posts-tagless [user-ids]
(do-select [(recent-posts-query nil)
(sql-array "int" user-ids)]))
(defn lookup-recent-posts-by-nicks [user-tag-id nicks]
(do-select [(recent-posts-nick-query user-tag-id)
(sql-array "varchar" nicks)]))
(defn lookup-recent-posts-tagless-by-nicks [nicks]
(do-select [(recent-posts-nick-query nil)
(sql-array "text" nicks)]))
(defn fetch-message-by-id [m-id]
(let [query "SELECT m.message_id, m.content, m.created_on, m.user_id,
m.is_image, u.nick, u.avatar, r.key, r.admin_only
FROM messages m, users u, rooms r
WHERE m.user_id = u.user_id
AND r.room_id = m.room_id
AND m.message_id = ?"]
(first (do-select [query (maybe-parse-int m-id -1)]))))
;;;; Popular Posts
(def popular-dumps-qry "
select u.nick, u.avatar, r.key, m.message_id, m.content, m.created_on, count(*) as count,
array_agg(u2.nick) as user_nicks
from users u, messages m, rooms r, tags t, users u2
where lower(u.nick) = lower(?)
and u.user_id = m.user_id and m.message_id = t.message_id
and m.room_id = r.room_id and m.is_image = true and r.admin_only = false
and t.tag = 'favorite'
and t.user_id = u2.user_id
group by u.nick, u.avatar, r.key, m.message_id, m.content, m.created_on
order by count desc limit ? offset ?")
(defn fetch-popular-dumps [nick viewer-nick]
(for [d (do-select [popular-dumps-qry nick 40 0])]
(let [favers (.getArray (:user_nicks d))]
(assoc d
:favers favers
:favorited (some #(= % viewer-nick) favers)))))
(defn fetch-popular-dumps-redis [nick viewer-nick]
(let [rkey (str "popular:" nick)
msg-ids (redis/with-server redis-server
(redis/zrevrange rkey 0 (dec num-popular-dumps)))
msg-ids (map maybe-parse-int msg-ids)]
(if-not (empty? msg-ids)
(tags/fetch-dumps-by-ids msg-ids viewer-nick))))
;;;; Redis Favscores
(defn fetch-redis-directory [page num]
(vec
(for [t (with-jedis
#(.zrevrangeWithScores %
"favscores"
(* page num)
(dec (* (inc page) num))))]
{:nick (.getElement t)
:score (int (.getScore t))})))
(defn fetch-redis-favscore [nick]
(if (= (lower-case nick) "scottbot")
-1
(maybe-parse-int
(redis/with-server redis-server
(redis/zscore "favscores" (lower-case nick)))
0)))
(defn incrby-redis-favscore! [nick msg-id inc is-image]
(let [msg-id (str msg-id)
inc (double inc)]
(with-jedis
#(do
(.zincrby % "favscores" inc (lower-case nick))
(when is-image
(.zincrby % (str "popular:" nick) inc msg-id)
(.zincrby % "hall" inc msg-id))))))
;;;; Redis Hall of Fame
(defn fetch-redis-hall [viewer-nick]
(let [ids (map maybe-parse-int
(redis/with-server redis-server
(redis/zrevrange "hall" 0 (dec num-hall-dumps))))]
(if-not (empty? ids)
(tags/fetch-dumps-by-ids ids viewer-nick))))
;;;; Message insertion
(def msg-insert-query
"INSERT INTO messages (user_id, room_id, content, is_image, is_text)
VALUES (?, ?, ?, ?, ?) RETURNING message_id, created_on")
(defn insert-message-into-postgres! [author-id room-id content is-image is-text recips]
(with-connection *db*
(transaction
(let [{msg-id :message_id ts :created_on}
(first
(do-select [msg-insert-query
author-id room-id content is-image is-text]))]
(doseq [r recips]
(insert-values
:direct_messages
[:message_id :author_id :recip_id]
[msg-id author-id (:user_id r)]))
[msg-id ts]))))
(defn insert-recips-into-redis! [recips author-id ts content]
(let [dm-json (json-str {"author_id" author-id
"recips" (map :nick recips)
"content" content})]
(redis/with-server redis-server
(redis/atomically
(doseq [r recips]
(redis/zadd (str "directmessage:" (:user_id r))
(.getTime ts)
dm-json))))))
(defn insert-message! [author-id author-nick room-id content]
(let [msg-type (classify-msg content)
is-image (boolean (#{:image :mixed} msg-type))
is-text (boolean (#{:mixed :text} msg-type))
recips (get-recips content)
[msg-id ts] (insert-message-into-postgres! author-id
room-id
content
is-image
is-text
recips)]
(if-not (empty? recips)
(insert-recips-into-redis! recips author-id ts content))
{:author author-nick
:msg-id msg-id
:room room-id
:db-ts ts
:content content
:recips (map (comp lower-case :nick) recips)}))
(defn fetch-private-messages [user-id]
(for [dm (redis/with-server redis-server
(redis/zrevrange (str "directmessage:" user-id) 0 40))]
(let [dm (read-json dm)
info (fetch-user-id (get dm "author_id"))]
{"nick" (:nick info)
"content" (get dm "content")
"recips" (get dm "recips" [])
"avatar" (:avatar info)})))
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