Resize session images to 500x500

deps.edn

@@ -35,7 +35,8 @@
   potemkin/potemkin {:mvn/version "0.4.7"} ; def-map-type
 
   ;; Markdown
-  markdown-to-hiccup/markdown-to-hiccup {:mvn/version "0.6.2"}}
+  markdown-to-hiccup/markdown-to-hiccup {:mvn/version "0.6.2"}
+  com.drewnoakes/metadata-extractor {:mvn/version "2.19.0"}}
 
  :aliases
  {:dev

ops/nginx.conf

@@ -2,6 +2,7 @@ server {
     listen       8000;
     listen  [::]:8000;
     server_name  compass.heartofclojure.eu;
+    client_max_body_size 20M;
 
     location /uploads/ { 
       alias /home/compass/uploads/;

src/co/gaiwan/compass/db/schema.clj

@@ -53,6 +53,7 @@
    [:session/duration :string "Duration of the session in ISO interval notation"]
    [:session/location :ref "Where does the session take place"]
    [:session/image :string "Image URL, either absolute, or relative to compass root"]
+   [:session/thumbnail :string "Downsized image thumbnail"]
    [:session/capacity :long "Number of people that are able to join this session"]
    [:session/ticket-required? :boolean "If this session requires a ticket"]
    [:session/published? :boolean "If this session is published/visible?"]

src/co/gaiwan/compass/html/profiles.clj

@@ -117,7 +117,6 @@
     :border-radius t/--size-2}
    [#{:textarea "input[type='text']"} {:background-color t/--surface-3}]]
   ([user]
-   (def user user)
    [:<>
     [:h2 "Edit Profile"]
     [:form {:method "POST" :action "/profile/save" :enctype "multipart/form-data"}

src/co/gaiwan/compass/images.clj

@@ -0,0 +1,98 @@
+(ns co.gaiwan.compass.images
+  (:require
+   [clojure.java.io :as io])
+  (:import
+   (java.awt.geom AffineTransform)
+   (java.awt.image AffineTransformOp BufferedImage DataBufferByte Raster)
+   (java.io ByteArrayInputStream ByteArrayOutputStream)
+   (java.lang ArrayIndexOutOfBoundsException)
+   (javax.imageio ImageIO)))
+
+(set! *warn-on-reflection* true)
+
+(def ^"[F" float4 (make-array Float/TYPE 4))
+
+(defn image-raster ^Raster [^BufferedImage img]
+  (.. img getRaster))
+
+(defn raster-data [img]
+  (.getData ^DataBufferByte (.getDataBuffer (image-raster img))))
+
+(defn read-img [path]
+  (ImageIO/read (io/file path)))
+
+(defn bytes->img [bytes]
+  (ImageIO/read (ByteArrayInputStream. bytes)))
+
+(defn write-png [path img]
+  (ImageIO/write
+   ^java.awt.image.RenderedImage img
+   "png"
+   (io/file path)))
+
+(defn slice [img [x1 y1 x2 y2]]
+  (let [src-raster (image-raster img)
+        width (int (Math/ceil (inc (- x2 x1))))
+        height (int (Math/ceil (inc (- y2 y1))))
+        dest (BufferedImage. width height BufferedImage/TYPE_INT_ARGB)
+        ^java.awt.image.WritableRaster dest-raster (image-raster dest)]
+    (doseq [x (range width)
+            y (range height)
+            px (.getPixel src-raster (int (+ x1 x)) (int (+ y1 y)) float4)]
+      (try
+        (.setPixel dest-raster (int x) (int y) float4)
+        (catch ArrayIndexOutOfBoundsException e
+          (println "out of bounds:" [x1 y1 x2 y2] [x y] :width width :height height)
+          (throw e))))
+    dest))
+
+(defn width [^BufferedImage img]
+  (.getWidth img))
+
+(defn height [^BufferedImage img]
+  (.getHeight img))
+
+(defn new-img ^BufferedImage [w h]
+  (BufferedImage. w h BufferedImage/TYPE_INT_ARGB))
+
+(defn apply-transform [^BufferedImage in ^BufferedImage out ^AffineTransform at]
+  (let [^AffineTransformOp at-op (AffineTransformOp. at AffineTransformOp/TYPE_BILINEAR)]
+    (.filter at-op in out)))
+
+(defn scale-img [^BufferedImage img scale]
+  (apply-transform
+   img
+   (new-img (* (width img) scale)
+            (* (height img) scale))
+   (AffineTransform/getScaleInstance scale scale)))
+
+(defn rotate-180 [^BufferedImage img]
+  (apply-transform
+   img
+   (new-img (width img) (height img))
+   (AffineTransform/getRotateInstance Math/PI (/ (width img) 2) (/ (height img) 2))))
+
+(defn rotate-clockwise [^BufferedImage img]
+  (let [h (height img) w (width img)]
+    (apply-transform
+     img
+     (new-img h w)
+     (doto (AffineTransform.)
+       (.translate (/ h 2) (/ w 2))
+       (.rotate (/ Math/PI 2))
+       (.translate (- (/ w 2)) (- (/ h 2)))))))
+
+(defn rotate-counterclockwise [^BufferedImage img]
+  (let [h (height img) w (width img)]
+    (apply-transform
+     img
+     (new-img h w)
+     (doto (AffineTransform.)
+       (.translate (/ h 2) (/ w 2))
+       (.rotate (* 3/2 Math/PI))
+       (.translate (- (/ w 2)) (- (/ h 2)))))))
+
+(defn image-png-bytes [^BufferedImage img]
+  (let [baos (ByteArrayOutputStream.)]
+    (ImageIO/write img "png" baos)
+    (.toByteArray baos)))

src/co/gaiwan/compass/model/assets.clj

@@ -3,10 +3,14 @@
    [clojure.java.io :as io]
    [clojure.string :as str]
    [co.gaiwan.compass.config :as config]
+   [co.gaiwan.compass.images :as images]
    [hato.client :as hato])
   (:import
    (java.security MessageDigest)
-   (java.util Formatter)))
+   (java.util Formatter)
+   (javax.imageio ImageIO)))
+
+(set! *warn-on-reflection* true)
 
 (defn file-extension [mime]
   (let [[mime] (str/split mime #"\s*;\s*")]
@@ -16,6 +20,14 @@
       "image/webp" "webp"
       "image/svg+xml" "svg"} mime)))
 
+(defn ext->mime [path]
+  (let [ext (str/lower-case (last (str/split (str path) #"\.")))]
+    ({"png" "image/png"
+      "jpeg" "image/jpeg"
+      "gif" "image/gif"
+      "webp" "image/webp"
+      "svg" "image/svg+xml"} ext)))
+
 (defn sha256 [bytes]
   (.digest (MessageDigest/getInstance "SHA-256") bytes))
 
@@ -49,7 +61,9 @@
                    (bytes? source)
                    source
                    (instance? java.io.File source)
-                   (java.nio.file.Files/readAllBytes (.toPath source))
+                   (java.nio.file.Files/readAllBytes (.toPath ^java.io.File source))
+                   (instance? java.awt.image.BufferedImage source)
+                   (images/image-png-bytes source)
                    :else
                    (throw (ex-info {:source (class source)} "Unsupported data source")))
         filename (str (sha256-hex bytes) "." ext)
@@ -64,7 +78,45 @@
   (let [{:keys [^bytes body headers]} (hato/get url {:as :byte-array})]
     (add-to-content-addressed-storage (get headers "content-type") body)))
 
+(defn jpeg-orientation [f]
+  ;; 1: Normal (0° rotation)
+  ;; 3: Upside-down (180° rotation)
+  ;; 6: Rotated 90° counterclockwise (270° clockwise)
+  ;; 8: Rotated 90° clockwise (270° counterclockwise)
+  (case
+      (.getInt
+       (.getFirstDirectoryOfType
+        (com.drew.imaging.ImageMetadataReader/readMetadata (io/file f))
+        com.drew.metadata.exif.ExifIFD0Directory)
+       com.drew.metadata.exif.ExifIFD0Directory/TAG_ORIENTATION)
+    3 :upside-down
+    6 :counterclockwise
+    8 :clockwise))
+
+(defn resize-image
+  ([path max-width max-height]
+   (resize-image (ext->mime path) path max-width max-height))
+  ([mime-type path max-width max-height]
+   (let [source (images/read-img path)
+         width  (images/width source)
+         height (images/height source)
+         aspect (/ width height)
+         scale (min (/ max-width width)
+                    (/ max-height height))
+         rotation (when (= "image/jpeg" mime-type)
+                    (jpeg-orientation (io/file path)))
+         img (images/scale-img source scale)]
+     (case rotation
+       nil img
+       :upside-down (images/rotate-180 img)
+       :counterclockwise (images/rotate-clockwise img)
+       :clockwise (images/rotate-counterclockwise img)))))
+
 (comment
+  (def path "/home/arne/Downloads/IMG_20240914_212508.jpg")
+  (images/write-png "/tmp/resized.png"
+                    (resize-image path 500 500))
+  (add-to-content-addressed-storage "image/png" (resize-image path 500 500))
   (def r (hato/get "https://cdn.discordapp.com/avatars/758588684177768469/8b32119c1ae262544e2952ea60aaf9a7.png" {:as :byte-array}))
 
   (download-image  "https://cdn.discordapp.com/avatars/758588684177768469/8b32119c1ae262544e2952ea60aaf9a7.png"))

src/co/gaiwan/compass/model/session.clj

@@ -115,7 +115,8 @@
    (merge default-filters filters)))
 
 (defn session-image-css-value [session]
-  (str "url(" (assets/image-url (:session/image session)) ")"))
+  (str "url(" (assets/image-url (or (:session/thumbnail session)
+                                    (:session/image session))) ")"))
 
 (defn subtitle
   "Returns the subtitle if there is one, or 'organized by <person>' otherwise."

src/co/gaiwan/compass/repl.clj

@@ -23,6 +23,10 @@
          (db/db)
          name-or-email)))
 
+(:db/id
+ (user "Arne"))
+
+{:user/uuid #uuid "ee944d53-0c49-486c-9b4e-a178491673ba", :public-profile/name "Arne", :public-profile/avatar-url "66c1ebd5cfd87056a7fd591c773efe4cfe022304554e3f49988fb7a240010c19.png", :discord/id "758588684177768469", :discord/access-token "2cYNs1YwseOCwjmlkid2r7QiiVIl01", :discord/expires-at #time/zdt "2024-09-21T09:37:58.756+02:00[Europe/Brussels]", :discord/refresh-token "YauvlnohxgWk7XREbfRD02cXsV61xj", :discord/email "[email protected]"}
 (defn sessions []
   (map db/entity (db/q '[:find [?e ...]
                          :where

src/co/gaiwan/compass/routes/profiles.clj

@@ -17,8 +17,8 @@
 (defn GET-profile [{:keys [params] :as req}]
   {:html/body
    [h/profile-detail
-    (if-let [profile-id (:profile-id params)]
-      (db/entity profile-id)
+    (if-let [user-uuid (:user-uuid params)]
+      (db/entity [:user/uuid user-uuid])
       (:identity req))]})
 
 (defn GET-profile-form [req]
@@ -191,7 +191,7 @@
    ["/uploads/:filename"
     {:middleware [[response/wrap-requires-auth]]
      :get        {:handler file-handler}}]
-   ["/user/:profile-id"
+   ["/user/:user-uuid"
     {:name :profile/show
      :middleware [[response/wrap-requires-auth]]
      :get        {:handler GET-profile}}]

src/co/gaiwan/compass/routes/sessions.clj

@@ -77,7 +77,8 @@
       (= published? "on")
       (assoc :session/published? true)
       image
-      (assoc :session/image (assets/add-to-content-addressed-storage (:content-type image) (:tempfile image))))))
+      (assoc :session/image (assets/add-to-content-addressed-storage (:content-type image) (:tempfile image))
+             :session/thumbnail (assets/add-to-content-addressed-storage "image/png" (assets/resize-image (:content-type image) (:tempfile image) 500 500))))))
 
 (defn POST-create-session
   "Create new session, save to Datomic