feat(app): update nginx image source

src/app/haxe/ru/m/puzzlez/source/NginxImageSource.hx

@@ -25,6 +25,7 @@ class NginxImageSource implements ImageSource {
   public var id(default, never):String = "nginx";
 
   private var baseUrl:String;
+  private var cache:Map<String, Promise<NginxResponse>> = new Map();
 
   public function new(baseUrl:String) {
     this.baseUrl = baseUrl;
@@ -36,31 +37,35 @@ class NginxImageSource implements ImageSource {
 
   public function getPage(page:Page):Promise<DataPage<ImageId>> {
     var category = page.filter.get("category");
-    return new JsonLoader<NginxResponse>().GET(category != null ? this.baseUrl + category + "/" : this.baseUrl)
+    var url = category != null ? this.baseUrl + category + "/" : this.baseUrl;
-      .then((response:NginxResponse) -> {
+    if (!this.cache.exists(url)) {
-        var data:Array<ImageId> = [];
+      this.cache.set(url, new JsonLoader<NginxResponse>().GET(url));
-        for (item in response) {
+    }
-          if (item.type == NginxResponseItemType.FILE) {
+    return this.cache.get(url).then((response:NginxResponse) -> {
-            var itemId = category != null ? category + "@" + item.name : item.name;
+      var data:Array<ImageId> = [];
-            data.push(new ImageId().setSource(id).setId(itemId));
+      for (item in response) {
-          }
+        if (item.type == NginxResponseItemType.FILE) {
+          var itemId = category != null ? category + "@" + item.name : item.name;
+          data.push(new ImageId().setSource(id).setId(itemId));
         }
-        return {
+      }
-          page: page,
+      data = data.slice(page.index * page.count, (page.index + 1) * page.count);
-          data: data,
+      return {
-          total: response.length,
+        page: page,
-        }
+        data: data,
-      });
+        total: response.length,
+      }
+    });
   }
 
   public function load(id:String, thumb:Bool = false):Promise<ImageValue> {
     var url = this.baseUrl + StringTools.replace(id, "@", "/");
-    if (thumb) {
+    // TODO: default size by screen width?
-      var parts = url.split(".");
+    var width = thumb ? 360 : 1920;
-      var index = parts.length - 2;
+    var parts = url.split(".");
-      parts[index] = parts[index] + "-thumbnail";
+    var index = parts.length - 2;
-      url = parts.join(".");
+    parts[index] = parts[index] + '-w${width}';
-    }
+    url = parts.join(".");
     return Promise.promise(ImageValue.URL(url));
   }