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

---
 .../java/com/juick/www/api/webhooks/VkWebhook.java | 76 ++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 src/main/java/com/juick/www/api/webhooks/VkWebhook.java

(limited to 'src/main/java/com/juick/www/api')

diff --git a/src/main/java/com/juick/www/api/webhooks/VkWebhook.java b/src/main/java/com/juick/www/api/webhooks/VkWebhook.java
new file mode 100644
index 00000000..9e4477b1
--- /dev/null
+++ b/src/main/java/com/juick/www/api/webhooks/VkWebhook.java
@@ -0,0 +1,76 @@
+/*
+ * 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.www.api.webhooks;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.juick.service.UserService;
+import com.juick.service.VKService;
+import com.juick.util.HttpBadRequestException;
+import org.apache.commons.io.IOUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.inject.Inject;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+
+@RestController
+public class VkWebhook {
+    private static final Logger logger = LoggerFactory.getLogger("VK");
+    @Value("${vk_webhook_secret:}")
+    private String secretKey;
+    @Value("${vk_webhook_confirmation:}")
+    private String confirmationCode;
+    @Inject
+    private ObjectMapper jsonMapper;
+    @Inject
+    private UserService userService;
+    @Inject
+    private VKService vkService;
+
+    @PostMapping(value = "/api/_vk")
+    public String processUpdate(InputStream body) throws IOException {
+        String data = IOUtils.toString(body, StandardCharsets.UTF_8);
+        logger.debug("Data: {}", data);
+        JsonNode json = jsonMapper.readTree(data);
+        var type = json.get("type").asText();
+        var secret = json.get("secret").asText("");
+        logger.info("Event received: {}, secret: {}", type, secret);
+        if (type.equals("confirmation")) {
+            return confirmationCode;
+        } else {
+            if (secretKey.equals(secret)) {
+                if (type.startsWith("donut_")) {
+                    var vkId = json.get("object").get("user_id").asLong(0);
+                    var userId = userService.getUIDbyVKID(vkId);
+                    if (userId > 0) {
+                        vkService.updatePremiumStatus(userId);
+                    }
+                }
+                return "ok";
+            } else {
+                throw new HttpBadRequestException();
+            }
+        }
+    }
+}
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