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(ns logikorr
(:gen-class :extends javax.servlet.http.HttpServlet)
(:use compojure.http compojure.html)
(:require [appengine-clj.datastore :as ds]
[org.danlarkin.json :as json])
(:import [com.google.appengine.api.datastore DatastoreServiceFactory Entity Query Query$FilterOperator Query$SortDirection KeyFactory EntityNotFoundException Key]
[com.google.appengine.api.users UserServiceFactory]))
(defmacro with-ds-transaction [& body]
`(call-with-ds-transaction (fn [] ~@body)))
(defn call-with-ds-transaction [thunk]
(let [ds (DatastoreServiceFactory/getDatastoreService)
success (atom false)
transaction (.beginTransaction ds)
return-value (atom nil)]
(try (do
(swap! return-value (fn [_] (thunk)))
(.commit transaction)
(swap! success (fn [_] true)))
(finally
(when-not @success
(.rollback transaction))))
@return-value))
(defn ds-update
"Update the corresponding entity from the supplied map in the data store."
[map]
(let [datastore (DatastoreServiceFactory/getDatastoreService),
entity (.get datastore #^Key (:key map))]
(doseq [[key value] (dissoc map :kind :key)]
(.setProperty entity (name key) value))
(.put datastore entity)))
(def *static-directory* "/Users/mulk/Dropbox/Projekte/LogiCLJ/war")
(defn current-revision []
(or (first (ds/find-all (doto (Query. "revision")
(.addSort "number" Query$SortDirection/DESCENDING))))
(ds/create {:kind "revision" :number 0})))
(defn find-students []
(ds/find-all (doto (Query. "student" (:key (current-revision))))))
(defn position [coll thing]
(loop [i 0,
coll2 coll]
(if (= (first coll2) thing)
i
(if-let [coll3 (next coll2)]
(recur (+ i 1) coll3)
nil))))
(defn split-name [name]
(let [n (position name \,)]
(if n
[(apply str (drop (+ n 2) name)) (apply str (take n name))]
[name ""])))
(defn find-student-by-name [name]
(let [[first-name last-name] (split-name name)]
(first (ds/find-all (doto (Query. "student" (:key (current-revision)))
(.addFilter "first-name" Query$FilterOperator/EQUAL first-name)
(.addFilter "last-name" Query$FilterOperator/EQUAL last-name))))))
(defn find-student-by-id [id]
(ds/get (KeyFactory/stringToKey id)))
(defn index [request]
(let [students (find-students)]
(html
[:html
[:head
[:title "Logik I: Korrekturergebnisse"]
[:script {:type "text/javascript" :src "js/prototype.js"}]
[:script {:type "text/javascript" :src "js/scriptaculous.js"}]
[:link {:type "text/css" :rel "stylesheet" :href "style.css"}]
[:script {:type "text/javascript" :src "http://yui.yahooapis.com/3.0.0/build/yui/yui-min.js"}]
[:script {:type "text/javascript" :src "logikorr.js"}]
[:script {:type "text/javascript" :src "logikorr-completion-data.js"}]]
[:body
[:h1 "Logik I: Korrekturergebnisse"]
[:h2 "Neue Ergebnisse"]
[:form [:button#make-revision {:type "button"} "Aktuelle Version sichern"]
[:div#new-version-label {:style "display: inline; color: #070"}]]
[:table#ergebnisse]
[:h2 "Bestehende Ergebnisse"]
[:table
[:tr
[:th "ID"] [:th "Punkte"] [:th "Nachname"] [:th "Vorname"]]
(map
(fn [student]
(let [{id :key score :score
last-name :last-name first-name :first-name}
student]
[:tr
[:td (str id)]
[:td (str score)]
[:td last-name]
[:td first-name]]))
students)]]])))
(defn unsplit-name [first last]
(if last
(str last ", " first)
first))
(defn compute-completion-data-js []
(str "autocompleteList = "
(json/encode-to-str (map (fn [x]
(unsplit-name (:first-name x) (:last-name x)))
(find-students)))
";"))
(defn find-student-json [name]
(let [student (find-student-by-name name)]
(json/encode-to-str {:id (KeyFactory/keyToString (:key student))
:score (seq (:score student))
:first-name (:first-name student)
:last-name (:last-name student)})))
(defn update-student-score [id score-number new-score-value]
(let [student (find-student-by-id id)
score (:score student)
num (Integer. score-number)]
(ds-update (assoc student
:score (concat (take num score)
[(Float. new-score-value)]
(drop (+ 1 num) score)))))
"\"OK\"")
(defn create-new-revision [])
(defroutes logikorr
(GET "/" index)
(GET "/favicon.ico" (do nil))
(GET "/logikorr-completion-data.js" (compute-completion-data-js))
(GET "/find-student" (find-student-json (:name params)))
(GET "/update-student-score" (update-student-score (:id params) (:score-number params) (:score params)))
(GET "/create-new-revision" (create-new-revision))
(GET "/*"
(or (serve-file *static-directory* (params :*)) :next))
(ANY "/*" (page-not-found)))
(defservice logikorr)
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