From 10dcb7324fac83c0190ff4a842360a035449f278 Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Tue, 20 Jun 2023 07:10:16 +0300
Subject: VK: read premium status using Callback API

---
 src/main/java/com/juick/service/VKService.java | 94 ++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 src/main/java/com/juick/service/VKService.java

(limited to 'src/main/java/com/juick/service/VKService.java')

diff --git a/src/main/java/com/juick/service/VKService.java b/src/main/java/com/juick/service/VKService.java
new file mode 100644
index 00000000..14d7e3e9
--- /dev/null
+++ b/src/main/java/com/juick/service/VKService.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2008-2023, Juick
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.juick.service;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.github.scribejava.apis.VkontakteApi;
+import com.github.scribejava.core.builder.ServiceBuilder;
+import com.github.scribejava.core.model.OAuth2AccessToken;
+import com.github.scribejava.core.model.OAuthRequest;
+import com.github.scribejava.core.model.Response;
+import com.github.scribejava.core.model.Verb;
+import com.github.scribejava.core.oauth.OAuth20Service;
+import jakarta.annotation.PostConstruct;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+import javax.inject.Inject;
+
+@Service
+public class VKService {
+    private static final Logger logger = LoggerFactory.getLogger("VK");
+    @Value("${vk_appid:appid}")
+    private String VK_APPID;
+    @Value("${vk_secret:secret}")
+    private String VK_SECRET;
+    private static final String VK_REDIRECT = "https://juick.com/_vklogin";
+    @Inject
+    private ObjectMapper jsonMapper;
+    @Inject
+    private UserService userService;
+    private OAuth20Service vkAuthService;
+
+    @PostConstruct
+    public void init() {
+        ServiceBuilder vkBuilder = new ServiceBuilder(VK_APPID);
+        setVkAuthService(vkBuilder.apiSecret(VK_SECRET)
+                .defaultScope("friends,wall,offline,groups")
+                .callback(VK_REDIRECT)
+                .build(VkontakteApi.instance()));
+    }
+
+    public void updatePremiumStatus(Integer userId) {
+        var vkUser = userService.getVkTokens(userId);
+        if (vkUser != null) {
+            OAuth2AccessToken token = new OAuth2AccessToken(vkUser.getRight());
+            OAuthRequest donRequest = new OAuthRequest(Verb.GET,
+                    "https://api.vk.com/method/donut.isDon?owner_id=-67669480&v=5.131");
+            getVkAuthService().signRequest(token, donRequest);
+            try (Response vkResponse = getVkAuthService().execute(donRequest)) {
+                if (vkResponse.isSuccessful()) {
+                    logger.info(vkResponse.getBody());
+                    var response = jsonMapper.readTree(vkResponse.getBody());
+                    if (response.has("response")) {
+                        var isDon = response.get("response").intValue() > 0;
+                        logger.info("{} is Don: {}", vkUser.getLeft(), isDon);
+                        userService.setPremium(userId, isDon);
+                    } else {
+                        // token is expired or does not have "groups" permissions
+                        userService.updateVkToken(userId, "");
+                    }
+                }
+            } catch (Exception e) {
+                logger.error("Don request error", e);
+            }
+        } else {
+            logger.warn("User is not connected to VK: {}", userId);
+        }
+    }
+
+    public OAuth20Service getVkAuthService() {
+        return vkAuthService;
+    }
+
+    public void setVkAuthService(OAuth20Service vkAuthService) {
+        this.vkAuthService = vkAuthService;
+    }
+}
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