session key problem at preview fixed

src-cljs/main.cljs

@@ -10,6 +10,7 @@
 ; frequently used selectors
 (def $draft ($ :#draft))
 (def $preview ($ :#preview))
+(def $session-key ($ :#session-key))
 (def $preview-start-line ($ :#preview-start-line))
 
 (defn scroll-to 
@@ -30,12 +31,13 @@
 (.click ($ :#preview-button)
         (fn [e]
           (do
-            (fm/remote (md-to-html (val $draft)) [result] 
+            (fm/remote (get-preview-md (val $session-key) (val $draft)) [{:keys [preview session-key]}] 
                        (show $preview-start-line)
-                       (inner $preview result)
+                       (inner $preview preview)
+                       (val $session-key session-key)
                        (scroll-to $preview-start-line)))))
 
 (.click ($ :#publish-button)
         (fn [e]
           (val ($ :#session-value) 
-               (nh/hash #(.charCodeAt % 0) (str (val $draft) (val ($ :#session-key)))))))
+               (nh/hash #(.charCodeAt % 0) (str (val $draft) (val $session-key))))))

src/NoteHub/views/common.clj

@@ -89,14 +89,16 @@
             :border-bottom [:1px :dashed :gray]
             :margin-bottom :5em)
       (rule "h1, h2, h3, h4" 
-            :font-family (gen-comma-list "'Noticia Text'" "Georgia"))))
+            :font-family (gen-comma-list "'Noticia Text'" "'PT Serif'"))))
 
 (defpartial layout [title & content]
             (html5
               [:head
                [:title "NoteHub — " title]
                (include-js "https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js")
-               [:link {:href "http://fonts.googleapis.com/css?family=Noticia+Text:400,700" 
+               [:link {:href (str "http://fonts.googleapis.com/css?family="
+                                  "PT+Serif:700|Noticia+Text:700"
+                                  "&subset=latin,cyrillic" )
                        :rel "stylesheet"
                        :type "text/css"}]
                [:style {:type "text/css"} global-css]]

src/NoteHub/views/pages.clj

@@ -20,8 +20,19 @@
 (def max-title-length 80)
 
 ; Markdown -> HTML mapper
-(defremote md-to-html [draft]
-           (.markdownToHtml (PegDownProcessor.) draft))
+(defn md-to-html [md-text]
+  (.markdownToHtml (PegDownProcessor.) md-text))
+
+(defn get-flash-key []
+  (let [k (encrypt (str (rand-int Integer/MAX_VALUE)))]
+    (do (flash-put! k true)
+      (print-str k))))
+
+; This function answers to a corresponding AJAX request
+(defremote get-preview-md [session-key md]
+           (when (flash-get session-key)
+             {:session-key (get-flash-key)
+              :preview (md-to-html md)}))
 
 ; Template for the error sites
 (defn page-setter [code message]
@@ -50,8 +61,7 @@
          (common/layout "New Markdown Note"
                         [:div.central-element
                          (form-to [:post "/post-note"]
-                                  (hidden-field :session-key (let [k (encrypt (str (rand-int Integer/MAX_VALUE)))]
-                                                              (do (flash-put! k true) (print-str k))))
+                                  (hidden-field :session-key (get-flash-key))
                                   (hidden-field {:id :session-value} :session-value)
                                   (text-area {:class :max-width} :draft)
                                   [:div#buttons.hidden
@@ -88,14 +98,15 @@
            (let [valid-session (flash-get session-key) ; it was posted from a newly generated form
                  valid-draft (not (empty? draft)) ; the note is non-empty
                  valid-hash (= (Short/parseShort session-value) ; the hash code is correct 
-                    (nh/hash #(.codePointAt % 0) (str draft session-key)))]
-            (do
-              (println "session:" valid-session "draft:" valid-draft "hash:" 
-                       (Short/parseShort session-value)
-                       (nh/hash #(.codePointAt % 0) (str draft session-key)))
-            (if (and valid-session valid-draft valid-hash)
+                               (nh/hash #(.codePointAt % 0) (str draft session-key)))]
              (do
-               (set-note date title draft)
-               ; TODO: the redirect is broken if title contains UTF chars
-               (redirect (apply str (interpose "/" ["" year month day title]))))
-             (get-page 400))))))
+               ; TODO: delete this if tests are written
+               (println "session:" valid-session "draft:" valid-draft "hash:" 
+                        (Short/parseShort session-value)
+                        (nh/hash #(.codePointAt % 0) (str draft session-key)))
+               (if (and valid-session valid-draft valid-hash)
+                 (do
+                   (set-note date title draft)
+                   ; TODO: the redirect is broken if title contains UTF chars
+                   (redirect (apply str (interpose "/" ["" year month day title]))))
+                 (get-page 400))))))