Map attribution WIP.

package-lock.json

@@ -278,6 +278,16 @@
       "integrity": "sha1-hZgoeOIbmOHGZCXgPQF0eI9Wnug=",
       "dev": true
     },
+    "canvas": {
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/canvas/-/canvas-2.6.1.tgz",
+      "integrity": "sha512-S98rKsPcuhfTcYbtF53UIJhcbgIAK533d1kJKMwsMwAIFgfd58MOyxRud3kktlzWiEkFliaJtvyZCBtud/XVEA==",
+      "requires": {
+        "nan": "^2.14.0",
+        "node-pre-gyp": "^0.11.0",
+        "simple-get": "^3.0.3"
+      }
+    },
     "caseless": {
       "version": "0.12.0",
       "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
@@ -476,6 +486,14 @@
         "ms": "^2.1.1"
       }
     },
+    "decompress-response": {
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-4.2.1.tgz",
+      "integrity": "sha512-jOSne2qbyE+/r8G1VU+G/82LBs2Fs4LAsTiLSHOCOMZQl2OKZ6i8i4IyHemTe+/yIXOtTcRQMzPcgyhoFlqPkw==",
+      "requires": {
+        "mimic-response": "^2.0.0"
+      }
+    },
     "deep-extend": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.6.0.tgz",
@@ -1026,6 +1044,11 @@
         "mime-db": "1.42.0"
       }
     },
+    "mimic-response": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-2.1.0.tgz",
+      "integrity": "sha512-wXqjST+SLt7R009ySCglWBCFpjUygmCIfD790/kVbiGmUgfYGuB14PiTd5DwVxSV4NcYHjzMkoj5LjQZwTQLEA=="
+    },
     "minimalistic-assert": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz",
@@ -1588,6 +1611,21 @@
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
       "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0="
     },
+    "simple-concat": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/simple-concat/-/simple-concat-1.0.1.tgz",
+      "integrity": "sha512-cSFtAPtRhljv69IK0hTVZQ+OfE9nePi/rtJmw5UjHeVyVroEqJXP1sFztKUy1qU+xvz3u/sfYJLa947b7nAN2Q=="
+    },
+    "simple-get": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/simple-get/-/simple-get-3.1.0.tgz",
+      "integrity": "sha512-bCR6cP+aTdScaQCnQKbPKtJOKDp/hj9EDLJo3Nw4y1QksqaovlW/bnptB6/c1e+qmNIDHRK+oXFDdEqBT8WzUA==",
+      "requires": {
+        "decompress-response": "^4.2.0",
+        "once": "^1.3.1",
+        "simple-concat": "^1.0.0"
+      }
+    },
     "simple-swizzle": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/simple-swizzle/-/simple-swizzle-0.2.2.tgz",

package.json

@@ -6,6 +6,7 @@
     "shadow-cljs": "^2.8.109"
   },
   "dependencies": {
+    "canvas": "^2.6.1",
     "commander": "^4.0.1",
     "geolib": "^3.2.0",
     "js-yaml": "^3.13.1",

src/main/lemondronor/advisorycircular.cljs

@@ -1,5 +1,6 @@
 (ns lemondronor.advisorycircular
   (:require
+   ["canvas" :as canvas]
    ["commander" :as commander]
    ["fs" :as fs]
    [cljs.pprint :as pprint]
@@ -743,6 +744,16 @@
 
 (def default-config-path "config.yaml")
 
+
+(defn write-stream-to-file [stream path]
+  (p/promise
+   [resolve]
+   (let [out (fs/createWriteStream path)]
+     (.pipe stream out)
+     (.on out "finish" #(do (println "resolving") (resolve nil)))
+     (.on out "error" #(throw %)))))
+
+
 (defn main [& args]
     (-> commander
       (.option "--lat <lat>" "Latitude of the circle of region of interest" parse-number)
@@ -767,6 +778,30 @@
   (logging/set-log-prefix! (or (.-logPrefix commander) ""))
   (reset! log-prefix (or (.-logPrefix commander) ""))
   (p/try
+    (p/let [path (nth (.-argv js/process) 2)
+            _ (println path)
+            image (canvas/loadImage path)
+            canvas (canvas/createCanvas (.-width image) (.-height image))
+            ctx (.getContext canvas "2d")]
+      (.drawImage ctx image 0 0)
+      (set! (.-font ctx) "12px Impact")
+      (let [attribution "Tiles © Esri — Source: Esri, i-cubed, USDA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGN, IGP, UPR-EGP, and the GIS User Community" ;; "© OpenStreetMap contributors"
+            text-metrics (.measureText ctx attribution)
+            w (.-width text-metrics)
+            h 12
+            [mw mh] [1 1]
+            [pw ph] [2 2]
+            text-x (- (.-width image) w pw mw)
+            text-y (- (.-height image) h ph mh )]
+        (.beginPath ctx)
+        (set! (.-fillStyle ctx) "rgba(128,128,128,0.7)")
+        (.rect ctx (- text-x pw) (- text-y ph) (+ w pw pw) (+ h ph ph))
+        (.fill ctx)
+        (set! (.-fillStyle ctx) "black")
+        (.fillText ctx attribution text-x (+ text-y h)))
+      (write-stream-to-file (.createPNGStream canvas) "out.png")
+      (println "DONE!")
+      (.exit js/process 0))
     (cond
       (.-createAircraftInfoDbFromJson commander)
       (create-aircraft-info-db (.-createAircraftInfoDbFromJson commander) (.-aircraftInfoDb commander))
@@ -830,8 +865,8 @@
                     (map #(str (:icao %) ":" (.toFixed (:curviness %) 0)))
                     (string/join " "))))))))
     (p/catch :default e
-      (log-error "%s" e)
-      (log-error "%s" (.-stack e))
+      (log-error "wee1 %s" e)
+      (log-error "wee2 %s" (.-stack e))
       (.exit js/process 1))))