Initial commit.

.gitignore

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+/target
+/classes
+/checkouts
+pom.xml
+pom.xml.asc
+*.jar
+*.class
+/.lein-*
+/.nrepl-port

LICENSE

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+THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
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+in any resulting litigation.

README.md

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+# jūtaku-kanban （住宅カンバン）
+
+Get offers from *immobilienscout24.de* directly to your Trello board.
+
+
+## Setup
+
+First, get yourself a [Trello API key](https://trello.com/app-key).
+
+Use that key to generate a token. Visit
+https://trello.com/1/authorize?expiration=never&scope=read,write&response_type=token&name=jutaku-kanban&key=API_KEY (replace your key in the URL).
+
+Pick a board. Navigate to it on Trello and get the board ID from the URL in
+your browser. It looks like https://trello.com/b/BOARD_ID/...
+
+Finally, get the ID of the list in which new entries should show up. Open
+https://api.trello.com/1/boards/BOARD_ID/lists?key=API_KEY&token=API_TOKEN
+and pick the `id` of the list you want.
+
+
+## Usage
+
+Refer to [setup](#Setup) for the first three arguments. The program uses a
+simple text file–`SEEN`–to keep track of seen offers. Pass it a search `URL`
+directly from any *immobilienscout24.de* results page.
+
+    $ java -jar jutaku-kanban-1.0.0-standalone.jar API_KEY API_TOKEN LIST_ID SEEN URL
+
+
+## Issues
+
+* Cards created via the Trello API don't show up in the iOS app (they do on the
+  web-app though).

project.clj

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+(defproject jutaku-kanban "1.0.0"
+  :description "Get offers from immobilienscout24.de directly to your Trello board."
+  :license {:name "Eclipse Public License"
+            :url "http://www.eclipse.org/legal/epl-v10.html"}
+  :dependencies [[cheshire "5.6.3"]
+                 [clj-http "2.3.0"]
+                 [enlive "1.1.6"]
+                 [org.clojure/clojure "1.8.0"]]
+  :main ^:skip-aot jutaku-kanban.core
+  :target-path "target/%s"
+  :profiles {:uberjar {:aot :all}})

src/jutaku_kanban/core.clj

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+(ns jutaku-kanban.core
+  (:gen-class)
+  (:require [clj-http.client :as client]
+            [clojure.edn :as edn]
+            [clojure.java.io :as io]
+            [clojure.set :as set]
+            [clojure.string :as string]
+            [jutaku-kanban.scrape :refer [all-results expose-url]]))
+
+(defonce api-root "https://api.trello.com/1")
+
+(defn- api-path [path]
+  (string/join "/" (cons api-root path)))
+
+(defn- api-call [method path msg & [opts rest]]
+  (let [o (if (some? opts) opts {})
+        r (method (api-path path)
+                  (assoc o :throw-exceptions false :as :json))]
+    (when-not
+      (contains? #{200 201 202 203 204 205 206 207 300 301 302 303 307}
+                 (:status r))
+      (println "HTTP error" msg (:status r))
+      (System/exit 1))
+    (:body r)))
+
+(defn- check-api
+  [api-key api-token list-id]
+  (let [r (api-call client/get ["tokens" api-token] "checking key/token"
+                    {:query-params {"key" api-key}})
+        by-type (reduce #(assoc %1 (:modelType %2) %2) {} (:permissions r))
+        board (get by-type "Board")]
+    (when-not (and (some? board) (:write board))
+      (println "API token does not have board write permissions.")
+      (System/exit 1)))
+  (api-call client/get ["lists" list-id] "getting list"
+            {:query-params {"key" api-key "token" api-token}}))
+
+
+(defn- create-card [api-key api-token list-id name desc]
+  (api-call
+   client/post
+   ["cards"]
+   "creating card"
+   {:form-params {"key" api-key "token" api-token "idList" list-id
+                  "name" name "desc" desc}}))
+
+(defn -main [& args]
+  (let [[api-key api-token list-id file url & rest] args
+        seen-ids (if (and (some? file) (.exists (io/file file)))
+                     (edn/read-string (slurp file))
+                     #{})]
+
+    (when (nil? url)
+      (println "No URL specified.")
+      (System/exit 1))
+    (when-not (set? seen-ids)
+      (println "Seen edn is not a set.")
+      (System/exit 1))
+
+    (check-api api-key api-token list-id)
+
+    (let [found-items (all-results url)
+          found-ids (set (keys found-items))
+          new-ids (set/difference found-ids seen-ids)]
+      (println (count (set/difference seen-ids found-ids)) "entries gone.")
+      (spit file (prn-str found-ids))
+      (println "Creating" (count new-ids) "new cards.")
+      (doseq [id new-ids]
+        (create-card api-key api-token list-id (get found-items id)
+                     (expose-url id))))))

src/jutaku_kanban/scrape.clj

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+(ns jutaku-kanban.scrape
+  (:require [net.cgrand.enlive-html :as html]))
+
+(defn- fetch-url
+  "Returns an HTML resource at URL."
+  [url]
+  (html/html-resource (java.net.URL. url)))
+
+(defn result-pages
+  "Returns a seq of all result page-URLs from a search results page."
+  [search-resource]
+  (->> (html/select search-resource [:div#pageSelection :option])
+       (map #(get-in % [:attrs :value]))
+       (map #(str "https://www.immobilienscout24.de" %))))
+
+(defn results
+  "Get a seq of result items on a page."
+  [search-resource]
+  (-> (html/select search-resource [:ul#resultListItems])
+      (first)
+      (html/select [(html/attr= :data-item "result")])))
+
+(defn result-id
+  "Get the ID of a result item."
+  [result-item]
+  (get-in result-item [:attrs :data-obid]))
+
+(defn result-title
+  "Get the title of a result item."
+  [result-item]
+  (let [t (html/select result-item
+                       [:h5.result-list-entry__brand-title html/text-node])
+        [title-or-neu nil-or-title] t]
+    (if (nil? nil-or-title) title-or-neu nil-or-title)))
+
+(defn expose-url
+  "Returns the URL of offer with ID's expose."
+  [id]
+  (str "https://www.immobilienscout24.de/expose/" id))
+
+(defn all-results
+  "Returns a map of all result IDs to their titles for a search URL."
+  [url]
+  (println "Getting initial result page.")
+  (let [init (fetch-url url)]
+    (->> (result-pages init)
+         (into #{})
+         (#(disj % url))
+         ((fn [x] (println "Getting" (count x) "more result pages.") x))
+         (map fetch-url)
+         (#(conj % init))
+         (map results)
+         (reduce concat)
+         (map (juxt result-id result-title))
+         (into {}))))