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(ns mulk.benki.lazychat
(:refer-clojure)
(:use [clojure repl]
[hiccup core page]
[noir core]
[noir-async core]
[mulk.benki auth config db util webutil feed]
;;
[clojure.core.match :only [match]]
[ring.util.codec :only [url-encode]]
[lamina.core :only [channel enqueue enqueue-and-close receive-all
map* filter*]]
[hiccup.util :only [escape-html]])
(:require [clojure.algo.monads :as m]
[clojure.java.jdbc :as sql]
[clojure.string :as string]
[noir.request :as request]
[noir.response :as response]
[noir.session :as session]
hiccup.core
[lamina.core :as lamina]
[aleph.http :as ahttp]
[aleph.formats :as aformats]
[clojure.data.json :as json]
[mulk.benki.xmpp :as xmpp]))
(defonce lafargue-events (channel))
(defmethod xmpp/format-message ::lafargue-message
[message]
(fmt nil "<~A>\n\n~A" (:first_name message) (:content message)))
(defn determine-targets [message-id]
(with-dbt
(map :user (query "SELECT \"user\" FROM user_visible_lazychat_messages
WHERE message = ?"
(:id (:id message-id))))))
(defn fill-in-author-details [x]
x)
(defn create-lazychat-message-by-user! [user
{content :content, visibility :visibility
format :format, targets :targets,
referees :referees, id :id}]
(with-dbt
(when id
;; FIXME: Is this assertion sufficient? Is it too strict?
(assert (query1 "SELECT 't' WHERE currval('posts_id_seq') >= ?" id)))
(let [id (or id
(:id (query1 "SELECT nextval('posts_id_seq')::INTEGER AS id")))]
(sql/with-query-results ids
["INSERT INTO lazychat_messages(id, owner, content, format)
VALUES (?, ?, ?, ?)
RETURNING id"
id user content format]
(log (fmt nil "~S ~S ~S ~S" id user content format))
(doseq [referee referees]
(sql/insert-values :lazychat_references
[:referrer :referee]
[id (int referee)]))
(doseq [target targets]
(sql/insert-values :post_targets
[:message :target]
[id (int target)]))
(case visibility
("public")
(sql/do-prepared
"INSERT INTO post_targets
SELECT ?, role FROM role_tags WHERE tag = 'world'"
[id])
("protected")
(sql/do-prepared
"INSERT INTO post_targets
SELECT ?, target FROM user_default_target WHERE (\"user\" = ?)"
[id user])
("private")
(do))
(enqueue lafargue-events
(with-meta
(fill-in-author-details
{:content content, :visibility visibility,
:format format, :targets targets,
:referees referees, :id id,
:owner user, :date (java.util.Date.)})
{:type ::lafargue-message}))))))
(defn create-lazychat-message! [msg]
{:pre [*user*]}
(create-lazychat-message-by-user! *user* msg))
(defn push-message-to-xmpp [msg]
(let [targets (filter integer? (determine-targets (:id msg)))]
(enqueue xmpp/messages {:message msg,
:targets targets})))
(defn- handle-xmpp-message [{sender :sender, body :body}]
(let [jid (first (string/split sender #"/"))
user (with-dbt
(:user (query1 "SELECT \"user\" FROM user_jids WHERE jid = ?" jid)))]
(create-lazychat-message-by-user! user
{:content body
:visibility "protected"
:format "markdown"
:targets []
:referees []})))
(defn select-message [id]
(let [message (query1 "SELECT owner, content, format, visibility, date
FROM lazychat_messages
WHERE id = ?"
id)
referees (map :referee (query "SELECT referee FROM lazychat_references WHERE referrer = ?" id))
targets (map :target (query "SELECT target FROM post_targets WHERE message = ?" id))]
(and message
(assoc message
:referees referees
:targets targets))))
(defn may-read? [user message]
(with-dbt
(seq
(query "SELECT 't' FROM user_visible_lazychat_messages
WHERE \"user\" IS NOT DISTINCT FROM ?
AND \"message\" = ?"
user
message))))
(defn may-post? [user]
user)
(def lafargue-list-page
{:head (list
[:link {:rel "stylesheet"
:href (resolve-uri "/style/hammer-and-sickle.css")
:type "text/css"}]
[:link {:rel "stylesheet"
:href (resolve-uri "/style/lafargue.css")
:type "text/css"}]
[:script {:src (resolve-uri "/js/lafargue.js")
:type "text/javascript"}])})
(defmacro with-messages-visible-by-user [[messages user] & body]
`(sql/with-query-results ~messages
["SELECT m.id, m.owner, m.date, m.content, m.format, u.first_name, u.last_name
FROM lazychat_messages m
JOIN users u ON (owner = u.id)
JOIN user_visible_lazychat_messages uvlm ON (uvlm.message = m.id)
WHERE uvlm.user IS NOT DISTINCT FROM ?
ORDER BY m.date DESC"
~user]
~@body))
(defn render-message [message]
(html
[:li {:class "lafargue-message"}
[:h2 {:class "lafargue-message-title"}]
[:p {:class "lafargue-message-date-and-owner"}
[:span {:class "lafargue-message-date"}
(escape-html (format-date (:date message)))]
[:span {:class "lafargue-message-owner"}
" by " (escape-html (:first_name message))]]
[:div {:class "lafargue-message-body"}
(sanitize-html (markdown->html (:content message)))]]))
(defn render-message-as-json [message]
(json/json-str (assoc message
:html (render-message message)
:date nil)))
(defpage "/lafargue" {}
(with-dbt
(layout lafargue-list-page "Lafargue Lazy Chat"
[:div {:id "notifications"
:class "notifications"}
(login-message)]
[:div
[:div {:id "lafargue-main-input-box" :class "lafargue-input-box"}
[:form {:method "POST" :action (link :lafargue :post)}
[:div [:textarea {:name "content", :rows 3, :cols 100}]]
[:div [:input {:type "hidden", :name "format", :value "markdown"}]]
[:div
[:input {:type "radio", :name "visibility", :value "protected" :checked "checked"} "Semi-private"]
[:input {:type "radio", :name "visibility", :value "public"} "Public"]]
[:div [:input {:type "submit"}]]]]
[:ul {:class "lafargue-list"}
(with-messages-visible-by-user [messages *user*]
(doall
(for [message messages]
(render-message message))))
[:div {:id "lafargue-footer"}
(let [feed-link (linkrel :lafargue :feed)]
[:span {:id "lafargue-footer-text"}
"[" [:a {:href (resolve-uri feed-link)} "Atom"] "]"
(when *user*
(list
" [" [:a {:href (resolve-uri (authlink feed-link))} "Atom auth"] "]"
" [" [:a {:href (authlink (:uri (request/ring-request)))} "authlink"] "]"))])]]])))
(defn lazychat-feed-for-user [user]
(with-dbt
(with-messages-visible-by-user [messages user]
(let [last-updated (sql/with-query-results results
["SELECT MAX(date) AS maxdate FROM lazychat_messages"]
(:maxdate (first results)))
items (map #(with-meta % {:type ::lazychat-message}) messages)]
(generate-feed "Lafargue Lazy Chat" last-updated "lafargue" (link :lafargue)
items)))))
(defpage "/lafargue/feed" {}
(response/content-type "application/atom+xml; charset=UTF-8"
(lazychat-feed-for-user *user*)))
(defpage-async "/lafargue/events" {} conn
(if (websocket? conn)
(let [messages (filter* #(may-read? *user* (:id %)) lafargue-events)]
(receive-all messages
(fn [msg]
(async-push conn (render-message-as-json msg)))))
(async-push conn {:status 426})))
(defpage [:any "/lafargue/post"] {content :content, visibility :visibility
format :format, targets :targets,
referees :referees}
(with-auth
(create-lazychat-message! {:content content, :visibility visibility,
:format format, :targets targets,
:referees referees})
(redirect (referrer))))
(defpage [:any "/lafargue/post"] {content :content, visibility :visibility
format :format, targets :targets,
referees :referees}
(with-auth
(create-lazychat-message! {:content content, :visibility visibility,
:format format, :targets targets,
:referees referees})
(redirect (referrer))))
(defpage [:put "/lafargue/messages/:id"] {id :id}
(if (may-post? *user*)
(let [message (assoc (slurp (:body (request/ring-request))) :id id)]
(create-lazychat-message! message)
{:status 200})
{:status 403}))
(defpage [:get "/lafargue/messages/:id"] {id :id}
(with-dbt
(let [message (select-message id)]
(if (may-read? *user* (:id message))
(response/json message)
{:status 403}))))
(defpage [:post "/lafargue/messages/genid"] {id :id}
(with-auth
(response/json
(with-dbt (query1 "SELECT NEXTVAL('posts_id_seq')")))))
(defn init-lazychat! []
(receive-all lafargue-events push-message-to-xmpp)
(receive-all xmpp/messages-in handle-xmpp-message))
|
