Implement multiboard and lazyloading as result, added todos

And shitton of them

project.clj

@@ -1,4 +1,4 @@
-(defproject rss-thread-watch "0.3.0-SNAPSHOT"
+(defproject rss-thread-watch "0.3.5-SNAPSHOT"
   :description "RSS based thread watcher"
   :url "http://example.com/FIXME"
   :license {:name "AGPL-3.0-only"

src/rss_thread_watch/core.clj

@@ -29,10 +29,11 @@
    :default-board "/mlp/"
    :enable-board-listing true
    :board-disabled-message "This board is not enabled for feed generation.\n\nYou can contact me here: [contact] and I may enable it for you"
-   :target "https://api.4chan.org"
    :boards-defaults {:refresh-rate 300
                      :starting-page 7
-                     :default-chod 94}
+                     :default-chod 94
+                     :target "https://api.4chan.org"
+                     :lazy-load true}
    :boards-enabled {"/mlp/" {}
                     "/g/" {}}})
 
@@ -60,12 +61,13 @@
   "Fills every enabled board with default config values"
   [config]
   (let [defaults (:boards-defaults config)]
-    (update-in config
+    (dissoc (update-in config
                        '(:boards-enabled)
                        (fn [mp]
                          (u/fmap (fn [k v]
                                    (u/map-apply-defaults v defaults))
-                         mp)))))
+                                 mp)))
+            :boards-defaults)))
 
 (defn get-some-config
   "Attempts to get config somehow,
@@ -87,16 +89,18 @@
   "Entry point, starts webserver"
   [& args]
   ;; Todo: Think of a way to start repeated download for every catalog efficiently
-  (let [config (get-some-config args)
-        expanded-config 
-
-        ]
+  (let [config (get-some-config args)]
+    ;; Init the few globals we have
+    (reset! watcher/GLOBAL-CONFIG config)
+    (reset! feed/boards-enabled-cache (set (keys (get config :boards-enabled))))
+    (reset! watcher/chod-threads-cache (watcher/generate-chod-cache-structure config))
     (println args)
-  (System/exit 0)
-  (set-interval (fn []
-                  (println "Starting cache update")
-                  (watcher/update-thread-cache! (:target config) (:starting-page config)))
-                (* 1000 (:refresh-delay config)))
+    (clojure.pprint/pprint config)
+    ;; Needs to be redone and probably removed from here
+    ;; (set-interval (fn []
+    ;;                 (println "Starting cache update")
+    ;;                 (watcher/update-board-cache! (:target config) (:starting-page config)))
+    ;;               (* 1000 (:refresh-delay config)))
     (jetty/run-jetty (rp/wrap-params feed/http-handler) {:port (:port CONFIG-DEFAULT)
                                                          :join? true})))
 

src/rss_thread_watch/feed_generator.clj

@@ -22,8 +22,8 @@
             [rss-thread-watch.utils :as ut])
   (:gen-class))
 
-
-
+(def boards-enabled-cache
+  (atom nil))
 
 (defn new-guid-always
   "Generates always unique GUID for Feed item.
@@ -48,9 +48,11 @@
 (defn filter-chod-posts
   "Return list of all threads with equal or higher ChoD than requested
 
-  READS FROM GLOBALS: watcher.time-of-cache" ;Todo: best thing would be to add timestamp to cache
-  [query-vec chod-treshold repeat? cache]
-  (let [time-of-generation @watcher/time-of-cache
+  READS FROM GLOBALS: watcher.time-of-cache"
+  [query-vec chod-treshold repeat? board-cache]
+
+  (let [{time-of-generation :time
+         cache :data} board-cache
         guid-fn (if repeat? (fn [x] (new-guid-always x time-of-generation))
                     update-only-guid)
         cache-start-index (first (ut/indices (fn [x] (>= (:chod x) chod-treshold))
@@ -73,9 +75,9 @@
 (defn thread-to-rss-item
   "If I wasnt retarded I could have made the cached version look like
   rss item already but what can you do. I'll refactor I promise, I just need this done ASAP" ;Todo: do what the docstring says
-  [t]
+  [t]                                                                                        ;TODO: oh Luna the hardcodes ;;RESUME
   (let [link-url (str "https://boards.4chan.org/mlp/thread/" (:no t))] ; jesus, well I said only /mlp/ is supported now so fuck it
-  {:title (format "%.2f%% - %s" (:chod t) (:title t))
+  {:title (format "%.2f%% - %s" (:chod t) (:title t))                  ;TODO: Generate link from the target somehow, or just include it from API response
    ;; :url link-url <- this is supposed to be for images according to: https://cyber.harvard.edu/rss/rss.html
    :description (format "The thread: '%s' has %.2f%% chance of dying" (:title t) (:chod t))
    :link link-url
@@ -97,9 +99,11 @@
 
    READS FROM GLOBALS:
      rss-thread-watch.watcher.chod-threads-cache
-     rss-thread-watch.core.CONFIG"
+     rss-thread-watch.watcher.GLOBAL-CONFIG" ;TODO: Update if it really reads from there anymore
   [rqst]
-  (try (let [{{chod "chod" :or {chod "94"}
+  (try (let [{{chod "chod"
+               board "board" :or {chod "94"
+                                  board (get @watcher/GLOBAL-CONFIG :default-board)}
                :as prms} :params
               uri :uri} rqst
              qrs (prms "q")
@@ -110,19 +114,23 @@
                                        chod)]
                          (try             ;If we can't parse number from chod, use default 94
                            (if (or (vector? chod)
-                                   (<= (Integer/parseInt chod) 60)) ; Never accept chod lower that 60 TODO: don't hardcode this
+                                   (<= (Integer/parseInt chod) 60)) ; Never accept chod lower than 60 TODO: don't hardcode this
                              60 (Integer/parseInt chod))
                            (catch Exception e
                              94)))
              cache @watcher/chod-threads-cache]
-         ;; (println "RCVD: " rqst)
-         (println rqst)
+         (println "\n\nRCVD: " rqst)
+         ;; (println rqst)
          ;; ====== Errors =====
          ;; Something other than feed.xml requested
          (when-not (s/ends-with? uri "feed.xml")
            (throw (ex-info "404" {:status 404
                                   :header {"Content-Type" "text/plain"}
                                   :body "404 This server has nothing but /feed.xml"})))
+         (when-not (contains? @boards-enabled-cache board)
+           (throw (ex-info "403" {:status 403
+                                  :header {"Content-Type" "text/plain"}
+                                  :body (get @watcher/GLOBAL-CONFIG :board-disabled-message)})))
          ;; No url params -> we redirect to documentation about params
          (when (empty? prms)
            (throw (ex-info "302"
@@ -146,13 +154,15 @@
           ;; There shouldn't be any problems with this mime type but if there are
           ;; replace with "text/xml", or even better, get RSS reader that is not utter shit
           :header {"Content-Type" "application/rss+xml"}
-          :body (generate-feed queries real-chod repeat? cache)})
+          :body (generate-feed queries real-chod repeat? (watcher/get-thread-data board @watcher/GLOBAL-CONFIG))})
        (catch Exception e
          ;; Ex-info has been crafted to match HTTP response body so we can send it
          (if-let [caught (ex-data e)]
            caught                       ;We have custom crafted error
+           (do
+             (print "WTF??: " e)
              {:status 500                 ;Something else fucked up, we print what happened
               :header {"Content-Type" "text/plain"}
               :body (str "500 - Something fucked up while generating feed, If you decide to report it, please include url adress you used:\n"
                          (ex-cause e) "\n"
-                       e)}))))
+                         e)})))))

src/rss_thread_watch/watcher.clj

@@ -18,17 +18,23 @@
             [clojure.data.json :as js])
   (:gen-class))
 
+(def GLOBAL-CONFIG
+  "Global config with defaults for missing entires"
+  ;; I know globals are ew in Clojure but I don't know any
+  ;; better way of doing this
+  (atom nil))
+
 (def chod-threads-cache
   "Cached map of threads that have CHanceOfDeath > configured"
-  nil)
+  (atom {}))
 
-(def time-of-cache nil)
-
-(defn init-global-cache
-  "Initializes global cache of catalogs"
+(defn generate-chod-cache-structure
+  "Generates initial structure for global cache
+   Structure is returned, you have to set it yourself"
   [config]
-  (keys (:boards-enabled config))
-  )
+  (let [ks (keys (:boards-enabled config))]
+    (zipmap ks
+            (repeatedly (count ks) #(atom nil)))))
 
 (defn process-page
   "Procesess every thread in page, leaving only relevant information
@@ -50,19 +56,23 @@
 (defn build-cache
   "Build cache of near-death threads so the values don't have to be recalculated on each request."
   [pages-to-index pages-total threads-per-page threads-total]
-  (vec (flatten (map (fn [single-page]
+  {:time (System/currentTimeMillis)
+   :data (vec (flatten (map (fn [single-page]
                               ;; We have to (dec page-number) bcs otherwise we would get the total number of threads
                               ;; including the whole page of threads
                               (let [page-number (dec (:page single-page))] ;        inc to get to the actuall page
                                 (process-page (:threads single-page) threads-total (inc (* page-number threads-per-page)))))
-                     pages-to-index))))
+                            pages-to-index)))})
 
-(defn update-thread-cache!
+(defn update-board-cache!
   "Updates cache of near-death threads. Writes to chod-threads-cache as side effect.
    [url] - Url to download data from
-   [starting-page] - From which page consider threads to be fit for near-death cache"
-  [url starting-page]
-  ;; Todo: surround with try so we can timeout and other stuff
+   [board] - Board to assign cached data to, it's existence is NOT checked here
+   [starting-page] - From which page consider threads to be fit for near-death cache
+   THIS FUNCTION WRITES TO chod-threads-cache
+   Returns :data part of [board] cache"
+  [url board starting-page]
+  ;; Todo: surround with try so we can timeout, 40x and other stuff
   (let [catalog (with-open [readr (io/reader url)]
                   (js/read readr :key-fn keyword))
         pages-total (count catalog)
@@ -72,5 +82,36 @@
         threads-total (+ (* threads-per-page (dec pages-total)) (count (:threads (last catalog)))) ;; Todo: Yeah, maybe this calculation could be refactored into let
         to-index (filter (fn [item]
                            (<= starting-page (:page item))) catalog)]
-    (reset! chod-threads-cache (build-cache to-index pages-total threads-per-page threads-total))
-    (reset! time-of-cache (System/currentTimeMillis))))
+    ;; TODO: there absolutely must be try catch for missing - not enabled boards,
+    ;; This will return nill and that fuck everything up
+     (reset! (get @chod-threads-cache board)
+             (build-cache to-index pages-total threads-per-page threads-total))))
+
+(defn board-enabled?
+  "Checks whether board is enabled in config"
+  [board config]
+  (contains? board (keys (get config :boards-enabled))))
+
+(defn get-board-url
+  "Gets board url from :target if "
+  [board config]
+  ;; TODO: jesus, this needs sanitization and should be probably crafted by some URL class
+  (str (get-in config [:boards-enabled board :target]) board "catalog.json"))
+
+(defn get-thread-data
+  "Gets thread cache for given board.
+   If board is lazy loaded, downloads new one if needed.
+
+   MAY CAUSE WRITE TO chod-thread-cache IF NECCESARRY"
+  [board config]
+  (let [refresh-rate (* 1000 (get-in config `(:boards-enabled ~board :refresh-rate)))
+        {data :data
+         time-downloaded :time
+         :or {time-downloaded 0}
+         :as board-atom } @(get @chod-threads-cache board)
+        ;; TODO: This also makes it implictly lazy-load -> if disabled make the check here
+        time-to-update? (or (nil? board-atom)
+                            (> (System/currentTimeMillis) (+ refresh-rate time-downloaded)))]
+    (if time-to-update?
+      (update-board-cache! (get-board-url "/mlp/" config) board (get-in config [:boards-enabled board :starting-page]))
+      @(get @chod-threads-cache board))))