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(ns cljssss-g
(require [clojure.xml :as xml]
[clojure.contrib.sql :as sql]
compojure)
(import (org.antlr.stringtemplate StringTemplateGroup)
(com.sun.syndication.io SyndFeedInput XmlReader)
(com.sun.syndication.feed.synd SyndFeed SyndEntry)
(java.net URL))
(use compojure))
(Class/forName "org.sqlite.JDBC")
(def templates (new StringTemplateGroup ""))
(defservlet cljssss-g
(GET "/"
(.toString
(doto (.getInstanceOf templates "index")
(.setAttributes {"title" "Subscriptions",
"mainParagraph" "Hi there!"}))))
(ANY "*"
(page-not-found)))
(def db-connection-data {:classname "org.sqlite.JDBC"
:subprotocol "sqlite"
:subname "cljssss-g.sqlite3"
:create true})
(defmacro with-db [& body]
`(sql/with-connection db-connection-data
~@body))
(defmacro with-dbt [& body]
`(with-db
(sql/transaction
~@body)))
(defn trim-nil [thing]
(and thing (.trim thing)))
(defn fetch-feed [id]
(with-db
(let [uri (sql/with-query-results [{uri :uri}]
["SELECT uri FROM feed WHERE id = ?" id]
uri),
feed #^SyndFeed (.build (new SyndFeedInput)
(new XmlReader (new URL uri)))]
(sql/transaction
(sql/update-values :feed
["id = ?" id]
{:language (.getLanguage feed)
:iri (.getUri feed)
:link (.getLink feed)
:rights (trim-nil (.getCopyright feed))
:title (trim-nil (.getTitle feed))
:subtitle (trim-nil (.getDescription feed))
:updated (.getPublishedDate feed)})
(doseq [entry #^SyndEntry (.getEntries feed)]
(sql/with-query-results [{potential-entry-id :id}]
["SELECT id FROM entry WHERE iri = ?" (.getUri entry)]
(let [entry-id
(or potential-entry-id
(+ 1
(sql/with-query-results [max-id-map]
["SELECT MAX(id) FROM entry"]
(or (second (first max-id-map)) -1))))]
(sql/update-or-insert-values :entry
["id = ?" entry-id]
{:id entry-id
:iri (.getUri entry)
:link (.getLink entry)
:title (trim-nil (.getTitle entry))
:summary_type (if (.getDescription entry)
(.getType (.getDescription entry))
nil)
:summary (if (.getDescription entry)
(.getValue (.getDescription entry))
nil)
:content_type (if (and (.getContents entry)
(first (.getContents entry)))
(.getType (first (.getContents entry)))
nil)
:content (if (and (.getContents entry)
(first (.getContents entry)))
(.getValue (first (.getContents entry)))
nil)
:updated (.getUpdatedDate entry)
:published (.getPublishedDate entry)})
(sql/update-or-insert-values :feed_entry_link
["feed = ? AND entry = ?" id entry-id]
{:feed id
:entry entry-id}))))))))
;; system-wide subscription
;; ******* FIXME: Doesnt work when no feed was subscribed yet
(defn subscribe-to-feed [url]
(let [maybe-ret
(with-dbt
(if (sql/with-query-results
[exi]
["SELECT id FROM feed WHERE uri=?" url]
(if exi
(second (first exi))
nil))
nil ;; do nothing, return nil
(let [free-id
(sql/with-query-results
[max-id]
["SELECT MAX(id) FROM feed"]
(if max-id (+ (second (first max-id)) 1) 0))]
(sql/update-or-insert-values :feed
["id = ?" free-id]
{:id free-id
:uri url})
free-id)))]
(if maybe-ret
(fetch-feed maybe-ret))
maybe-ret))
(run-server {:port 8080}
"/*" cljssss-g)
;;;; Sample database content
(comment
(with-dbt
(sql/update-or-insert-values :feed
["id = ?" 0]
{:id 0
:uri "http://matthias.benkard.de/journal/feed/"})
(sql/update-or-insert-values :feed
["id = ?" 1]
{:id 1
:uri "http://uxul.wordpress.com/feed/"})))
;;;; Database schema
(comment
(with-dbt
(sql/create-table :user
[:id "integer" "PRIMARY KEY"]
[:name "text"]
[:email "text"]
[:password "text"]))
(with-dbt
(sql/create-table :feed
[:id "integer" "PRIMARY KEY"]
[:uri "text"]
[:language "text"]
[:iri "text"]
[:icon "blob"]
[:link "text"]
[:logo "text"]
[:rights "text"]
[:title "text"]
[:subtitle "text"]
[:updated "timestamp"]))
(with-dbt
(sql/create-table :entry
[:id "integer" "PRIMARY KEY"]
[:uri "text"] ;?
[:language "text"]
[:content "blob"]
[:content_type "text"]
[:iri "text"]
[:link "text"]
[:published "timestamp"]
[:rights "text"]
[:source "integer"] ;:feed
[:title "text"]
[:summary "blob"]
[:summary_type "text"]
[:updated "timestamp"]))
(with-dbt
(sql/create-table :feed_entry_link
[:feed "integer"]
[:entry "integer"]))
(with-dbt
(sql/create-table :user_feed_link ;subscription
[:user "integer"]
[:feed "integer"]
[:title "text"]))
(with-dbt
(sql/create-table :user_entry_link
[:user "integer"]
[:entry "integer"]
[:read "boolean"]
[:marked "boolean"]
[:hidden "boolean"])))
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