Updated config examples.

config-skel.yaml

@@ -1,11 +1,23 @@
 adsbx:
   url: https://adsbexchange.com/api/aircraft/json
 pelias:
-  url: http://lockheed.local:4000/v1
+  url: http://localhost:4000/v1
 lat: 34.1335
 lon: -118.1924
-radius-km: 30
+radius-km: 50
-basestation-sqb: clean-basestation.sqb
 landmarks:
   blocklist:
     - Johnny.Depp
+twitter:
+  enabled?: true
+# Look for 4 circles in an hour instead of 25 minutes:
+#
+#max-history-age-ms: 3600000
+
+# The map screenshot should use aerial imagery instead of
+# openstreetmap:
+#
+#screenshot:
+#  layer: esri
+#  zoom: 12
+#  simple-tracks: false

secrets-skel.yaml

@@ -1,2 +1,7 @@
 adsbx:
   api-key: <my api key>
+twitter:
+    consumer-key: xxx
+    consumer-secret: xxx
+    access-token: xxx
+    access-token-secret: xxx

src/main/lemondronor/advisorycircular/twitter.cljs~

@@ -0,0 +1,52 @@
+(ns lemondronor.advisorycircular.twitter
+  (:require
+   ["fs" :as fs]
+   [kitchen-async.promise :as p]
+   [lemondronor.advisorycircular.logging :as logging]
+   [lemondronor.advisorycircular.util :as util]
+   ["twit" :as Twit]))
+
+(def fsprom (.-promises fs))
+
+(declare logger log-debug log-verbose log-info log-warn log-error)
+(logging/deflog "twitter" logger)
+
+
+;; Creates a new twit object.
+
+(defn twit [config]
+  (Twit. (clj->js {:consumer_key (:consumer-key config)
+                   :consumer_secret (:consumer-secret config)
+                   :access_token (:access-token config)
+                   :access_token_secret (:access-token-secret config)})))
+
+
+;; Uploads an image to twitter. Returns a promise that resolves to the
+;; new media ID of the image.
+
+(defn upload-image [twit path]
+  (log-info "Uploading media to twitter: %s" path)
+  (p/let [b64content (util/read-file path {:encoding "base64"})
+          result (.post twit "media/upload" (clj->js {:media_data b64content}))
+          media-id (get-in (js->clj result :keywordize-keys true) [:data :media_id_string])]
+    (log-info "%s got media ID %s" path media-id)
+    media-id))
+
+
+;; Posts a tweet with optional multiple media. Returns a promise that
+;; resolves to the response result.
+
+(defn tweet [twit status image-paths lat lon]
+  (p/then (p/all (map #(upload-image twit %) image-paths))
+          (fn [media-ids]
+            (log-warn "Tweeting status:'%s' with media: %s" status media-ids)
+            (p/let [result (.post twit "statuses/update"
+                                  (clj->js {:status status
+                                            :media_ids [media-ids]
+                                            :lat lat
+                                            :long lon
+                                            :display_coordinates true
+                                            }))
+                    result (js->clj result :keywordize-keys true)]
+              (log-debug "Tweet posted: %s" result)
+              result))))