From 9d6cbce94ecb17e400ef25dbab4b500a06b65483 Mon Sep 17 00:00:00 2001
From: f-r00t <fruktstav@gmail.com>
Date: Sat, 1 Jun 2024 12:20:42 +0200
Subject: [PATCH] Added rudimentary spam filter

---
 src/Database.js       | 53 ++++++++++++++++++++++++++++++++++++++++---
 src/Globals.js        |  9 +++++++-
 src/HuginUtilities.js |  7 ++++--
 3 files changed, 63 insertions(+), 6 deletions(-)

diff --git a/src/Database.js b/src/Database.js
index 43235d0..886e9f3 100644
--- a/src/Database.js
+++ b/src/Database.js
@@ -529,7 +529,7 @@ export async function openDB() {
 
         await createTables(database);
     } catch (err) {
-        Globals.logger.addLogMessage('Failed to open DB: ' + err);
+        Globals.logger.addLogMessage('Failed to open DB: ' + JSON.stringify(err));
     }
 }
 
@@ -2177,6 +2177,8 @@ export async function blockUser(address, nickname) {
     )
 
     console.log('Added to block list', address)
+    Globals.blockList.push(address);
+    Globals.logger.addLogMessage('Blocked users: ' + Globals.blockList.join(' ,'));
     removeGroupMessagesFromUser(address);
 
 }
@@ -2195,7 +2197,7 @@ export async function getBlockList() {
         for (let i = 0; i < data.rows.length; i++) {
 
             const item = data.rows.item(i);
-            timestamp = item.timestamp;
+
             blockList.push(item.address);
 
         }
@@ -2212,8 +2214,53 @@ export async function unBlockUsers (address) {
         `DELETE FROM
         blocklist
       WHERE
-        address = ${address}`);
+        address = "${address}"`);
 
 
     console.log('Removed from block list', address)
+}
+
+
+export async function isSpam (address, message, timestamp) {
+
+    const length = message.length;
+    const an_hour_ago = Date.now() - (60*60*1000);
+
+    if (length < 10) {
+        const [data] = await database.executeSql(
+            `
+            SELECT hash
+            FROM privateboards_messages_db D
+            WHERE message = "${message}"
+            AND address = "${address}"
+            AND timestamp > ${an_hour_ago}
+            `);
+    
+            if (data && data.rows && data.rows.length) { 
+                return true;
+            } else {
+                return false;
+            }
+    };
+
+    const partLength = Math.ceil(length / 3);
+    
+    const part1 = message.slice(0, partLength);
+    const part2 = message.slice(partLength, partLength * 2);
+    const part3 = message.slice(partLength * 2);
+
+    const [data] = await database.executeSql(
+        `
+        SELECT hash
+        FROM privateboards_messages_db D
+        WHERE message LIKE "%${part1}%" OR message LIKE "%${part2}%" OR message LIKE "%${part3}%"
+        AND timestamp > ${an_hour_ago}
+        `);
+
+        if (data && data.rows && data.rows.length) { 
+            return true;
+        } else {
+            return false;
+        }
+
 }
\ No newline at end of file
diff --git a/src/Globals.js b/src/Globals.js
index a61d013..3cb49ed 100644
--- a/src/Globals.js
+++ b/src/Globals.js
@@ -15,7 +15,7 @@ import NetInfo from "@react-native-community/netinfo";
 import { deleteUserPinCode } from '@haskkor/react-native-pincode';
 
 import { getBlockList, getLastSync, setHaveWallet, openDB, deleteDB, getKnownTransactions, getUnreadMessages, getGroupMessages, saveGroupToDatabase, removeMessages, loadPayeeDataFromDatabase, savePayeeToDatabase, removePayeeFromDatabase,
-loadTransactionDetailsFromDatabase, saveTransactionDetailsToDatabase, removeGroupFromDatabase, getMessages, getLatestMessages, getBoardsMessages, getBoardSubscriptions, loadGroupsDataFromDatabase } from './Database';
+loadTransactionDetailsFromDatabase, saveTransactionDetailsToDatabase, removeGroupFromDatabase, getMessages, getLatestMessages, getBoardsMessages, getBoardSubscriptions, loadGroupsDataFromDatabase, unBlockUsers } from './Database';
 import Config from './Config';
 import { Logger } from './Logger';
 import { getCoinPriceFromAPI } from './Currency';
@@ -453,6 +453,13 @@ export async function initGlobals() {
 
     Globals.lastMessageTimestamp = lastSync.lastSyncGroup;
 
+    await unBlockUsers('SEKReWcYe3X1bVh2Cv3YfY6nosjm1ZDhAG5y6jwMbPofEUUwi5Kgt6dM8z1tJjuHe6AASFqViHxBxM92x1oJ71WgRT4aL4XGbC8');
+    await unBlockUsers('SEKReTbT3Kr1YAJdGT7HudX9nG7iq99vpbxgWKhHgg3G4daZpnp5zxfeMpQpigJKAf8Fu4RYybyQpSz2rGj4TPDGePE4oUkP4Sp');
+    await unBlockUsers('SEKReXtKuFcEfMuvf9SY4nFYVz6KifongWRt3Kuvo5TfU1yDh5DGFYoCNVAVhE6oUZ83GVhpQg8XJg14w8Tzb5XdRJH5iz4VVdE');
+    await unBlockUsers('SEKReUabHDKVWqE7mtYjQeY2mMQYq49U8TQYzEQ2KidDd7fwtmWMhorMhHoXChpikL7c8rYi2AAyTS4SVxWfvkK18ku4zVd8zFv');
+
     Globals.blockList = await getBlockList();
 
+    Globals.logger.addLogMessage('Blocked users: ' + Globals.blockList.join(' ,'));
+
 }
diff --git a/src/HuginUtilities.js b/src/HuginUtilities.js
index 21d1638..292242d 100644
--- a/src/HuginUtilities.js
+++ b/src/HuginUtilities.js
@@ -27,7 +27,7 @@ import * as NaclSealed from 'tweetnacl-sealed-box';
 
 import Identicon from 'identicon.js';
 
-import {setLastSyncGroup, setLastSyncDM, emptyKnownTXs, updateGroupMessage, updateMessage, savePreferencesToDatabase, getGroupName, saveGroupMessage, groupMessageExists, getGroupKey, getLatestGroupMessage, getHistory, getLatestMessages, saveToDatabase, loadPayeeDataFromDatabase, saveMessage, saveBoardsMessage, savePayeeToDatabase, messageExists, getLatestMessage, saveKnownTransaction } from './Database';
+import {setLastSyncGroup, setLastSyncDM, emptyKnownTXs, updateGroupMessage, updateMessage, savePreferencesToDatabase, getGroupName, saveGroupMessage, groupMessageExists, getGroupKey, getLatestGroupMessage, getHistory, getLatestMessages, saveToDatabase, loadPayeeDataFromDatabase, saveMessage, saveBoardsMessage, savePayeeToDatabase, messageExists, getLatestMessage, saveKnownTransaction, isSpam } from './Database';
 
 /**
  * Save wallet in background
@@ -883,8 +883,11 @@ async function getGroupMessage(tx) {
   Globals.logger.addLogMessage('[Message sync] New message found: ' + payload_json.m.slice(0,10));
 
   const from = payload_json.k;
-  if (Globals.blockList.some(a => a === from)) return false;
 
+  const spam = await isSpam(from, payload_json.m, tx.t);
+  if (spam) return false;
+
+  if (Globals.blockList.some(a => a === from)) return false;
 
   const from_myself = (from == Globals.wallet.getPrimaryAddress() ? true : false);