[client] compare versions in updater

src/client/haxe/ru/m/update/Updater.hx

@@ -0,0 +1,86 @@
+package ru.m.update;
+
+import haxework.net.JsonLoader;
+import openfl.Lib;
+import openfl.net.URLRequest;
+import promhx.Promise;
+import ru.m.Device;
+import ru.m.update.Version;
+
+@:enum abstract PackageType(String) from String to String {
+    var APK = "apk";
+    var DEB = "deb";
+    var EXE = "exe";
+    var ARCHIVE = "archive";
+}
+
+typedef PackageInfo = {
+    var platform:Platform;
+    var type:PackageType;
+    var path:String;
+    var filename:String;
+    var url:String;
+    var version:String;
+}
+
+typedef PackagesBundle = {
+    var name:String;
+    var version:String;
+    var packages:Array<PackageInfo>;
+}
+
+class Updater {
+
+    private static inline var TAG = "Update";
+
+    public var type(get, null):PackageType;
+    public var bundle(default, null):PackagesBundle;
+
+    private var url:String;
+    private var version:Version;
+
+    public function new(version:String, url:String) {
+        this.url = url;
+        this.version = version;
+    }
+
+    private function get_type():PackageType {
+        return switch Device.platform {
+            case ANDROID: APK;
+            case LINUX: DEB;
+            case WINDOWS: EXE;
+            case _: null;
+        }
+    }
+
+    private function resolveBundle():Promise<PackagesBundle> {
+        return bundle != null ? Promise.promise(bundle) : new JsonLoader().GET(url).then(function(bundle) {
+            this.bundle = bundle;
+            return this.bundle;
+        });
+    }
+
+    public function check():Promise<Bool> {
+        return resolveBundle().then(function(bundle:PackagesBundle):Bool {
+            this.bundle = bundle;
+            return Lambda.exists(bundle.packages, function(item) return (
+                item.platform == Device.platform &&
+                item.type == type &&
+                version < Version.fromString(item.version)
+            ));
+        });
+    }
+
+    public function download():Promise<Bool> {
+        return resolveBundle().then(function(bundle:PackagesBundle) {
+            for (item in bundle.packages) {
+                if (item.platform == Device.platform && item.type == type) {
+                    L.i(TAG, 'download: ${item.url}');
+                    Lib.getURL(new URLRequest(item.url));
+                    return true;
+                }
+            }
+            return false;
+        });
+    }
+}