From eb78bb4915b33510f27bf346946450629d401d12 Mon Sep 17 00:00:00 2001
From: NejcZdovc <nejc.zdovc@3zsistemi.si>
Date: Fri, 3 Jan 2020 11:31:06 +0100
Subject: [PATCH] Fixed contribution queue not being deleted

Resolves https://github.com/brave/brave-browser/issues/7579
---
 .../database/database_contribution_queue.cc   |  51 ++++++++++++++--
 .../database/database_contribution_queue.h    |   2 +
 .../database_contribution_queue_publishers.cc |  56 ++++++++++++++++++
 .../database_contribution_queue_publishers.h  |   6 ++
 .../publisher_info_database_unittest.cc       |  44 +++++++++++++-
 .../database/contribution_queue_key_corrupted | Bin 0 -> 139264 bytes
 .../database/contribution_queue_key_ok        | Bin 0 -> 139264 bytes
 7 files changed, 154 insertions(+), 5 deletions(-)
 create mode 100644 test/data/rewards-data/database/contribution_queue_key_corrupted
 create mode 100644 test/data/rewards-data/database/contribution_queue_key_ok

diff --git a/components/brave_rewards/browser/database/database_contribution_queue.cc b/components/brave_rewards/browser/database/database_contribution_queue.cc
index 3448b8d014a4..b7f81b8cc1fe 100644
--- a/components/brave_rewards/browser/database/database_contribution_queue.cc
+++ b/components/brave_rewards/browser/database/database_contribution_queue.cc
@@ -49,6 +49,14 @@ bool DatabaseContributionQueue::Init(sql::Database* db) {
     return false;
   }
 
+  // We need to clear queue if user has corrupted foreign key
+  // more info: https://github.com/brave/brave-browser/issues/7579
+  if (publishers_->HasCorruptedForeignKey(db)) {
+    if (!DeleteAllRecords(db)) {
+      return false;
+    }
+  }
+
   return transaction.Commit();
 }
 
@@ -148,8 +156,13 @@ ledger::ContributionQueuePtr DatabaseContributionQueue::GetFirstRecord(
 bool DatabaseContributionQueue::DeleteRecord(
     sql::Database* db,
     const uint64_t id) {
-  if (!db->Execute("PRAGMA foreign_keys=1;")) {
-    LOG(ERROR) << "Error: deleting record for contribution queue with id" << id;
+  DCHECK(db);
+  if (id == 0 || !db) {
+    return false;
+  }
+
+  sql::Transaction transaction(db);
+  if (!transaction.Begin()) {
     return false;
   }
 
@@ -163,11 +176,41 @@ bool DatabaseContributionQueue::DeleteRecord(
 
   bool success = statement.Run();
 
-  if (!db->Execute("PRAGMA foreign_keys=0;")) {
+  if (!success) {
+    return false;
+  }
+
+  if (!publishers_->DeleteRecordsByQueueId(db, id)) {
+    return false;
+  }
+
+  return transaction.Commit();
+}
+
+bool DatabaseContributionQueue::DeleteAllRecords(sql::Database* db) {
+  DCHECK(db);
+  if (!db) {
     return false;
   }
 
-  return success;
+  sql::Transaction transaction(db);
+  if (!transaction.Begin()) {
+    return false;
+  }
+
+  const std::string query = base::StringPrintf("DELETE FROM %s", table_name_);
+  sql::Statement statement(db->GetUniqueStatement(query.c_str()));
+  bool success = statement.Run();
+
+  if (!success) {
+    return false;
+  }
+
+  if (!publishers_->DeleteAllRecords(db)) {
+    return false;
+  }
+
+  return transaction.Commit();
 }
 
 }  // namespace brave_rewards
diff --git a/components/brave_rewards/browser/database/database_contribution_queue.h b/components/brave_rewards/browser/database/database_contribution_queue.h
index 06f87636005e..449d32c50e29 100644
--- a/components/brave_rewards/browser/database/database_contribution_queue.h
+++ b/components/brave_rewards/browser/database/database_contribution_queue.h
@@ -32,6 +32,8 @@ class DatabaseContributionQueue: public DatabaseTable {
 
   bool DeleteRecord(sql::Database* db, const uint64_t id);
 
+  bool DeleteAllRecords(sql::Database* db);
+
  private:
   std::string GetIdColumnName();
 
diff --git a/components/brave_rewards/browser/database/database_contribution_queue_publishers.cc b/components/brave_rewards/browser/database/database_contribution_queue_publishers.cc
index b26709d22917..9e8d2b3d672d 100644
--- a/components/brave_rewards/browser/database/database_contribution_queue_publishers.cc
+++ b/components/brave_rewards/browser/database/database_contribution_queue_publishers.cc
@@ -13,6 +13,10 @@
 #include "sql/statement.h"
 #include "sql/transaction.h"
 
+namespace {
+  const char kCorruptedForeignKey[] = "publisher_info_old";
+}  // namespace
+
 namespace brave_rewards {
 
 DatabaseContributionQueuePublishers::DatabaseContributionQueuePublishers(
@@ -121,4 +125,56 @@ DatabaseContributionQueuePublishers::GetRecords(
   return list;
 }
 
+bool DatabaseContributionQueuePublishers::DeleteRecordsByQueueId(
+    sql::Database* db,
+    const uint64_t queue_id) {
+  DCHECK(db);
+  if (queue_id == 0 || !db) {
+    return false;
+  }
+
+  const std::string query = base::StringPrintf(
+      "DELETE FROM %s WHERE %s_id = ?",
+      table_name_,
+      parent_table_name_);
+
+  sql::Statement statement(db->GetUniqueStatement(query.c_str()));
+  statement.BindInt64(0, queue_id);
+
+  return statement.Run();
+}
+
+bool DatabaseContributionQueuePublishers::HasCorruptedForeignKey(
+    sql::Database* db) {
+  DCHECK(db);
+  if (!db) {
+    return false;
+  }
+
+  const std::string query = base::StringPrintf(
+      "PRAGMA foreign_key_list(%s)",
+      table_name_);
+
+  sql::Statement statement(db->GetUniqueStatement(query.c_str()));
+
+  while (statement.Step()) {
+    if (statement.ColumnString(2) == kCorruptedForeignKey) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool DatabaseContributionQueuePublishers::DeleteAllRecords(sql::Database* db) {
+  DCHECK(db);
+  if (!db) {
+    return false;
+  }
+
+  const std::string query = base::StringPrintf("DELETE FROM %s", table_name_);
+  sql::Statement statement(db->GetUniqueStatement(query.c_str()));
+  return statement.Run();
+}
+
 }  // namespace brave_rewards
diff --git a/components/brave_rewards/browser/database/database_contribution_queue_publishers.h b/components/brave_rewards/browser/database/database_contribution_queue_publishers.h
index 0e7f2b9f5eb5..47a55dca4f9b 100644
--- a/components/brave_rewards/browser/database/database_contribution_queue_publishers.h
+++ b/components/brave_rewards/browser/database/database_contribution_queue_publishers.h
@@ -33,6 +33,12 @@ class DatabaseContributionQueuePublishers: public DatabaseTable {
       sql::Database* db,
       const uint64_t queue_id);
 
+  bool DeleteRecordsByQueueId(sql::Database* db, const uint64_t queue_id);
+
+  bool HasCorruptedForeignKey(sql::Database* db);
+
+  bool DeleteAllRecords(sql::Database* db);
+
  private:
   const char* table_name_ = "contribution_queue_publishers";
   const int minimum_version_ = 9;
diff --git a/components/brave_rewards/browser/database/publisher_info_database_unittest.cc b/components/brave_rewards/browser/database/publisher_info_database_unittest.cc
index 8f38fc4dc5fe..120042e9e467 100644
--- a/components/brave_rewards/browser/database/publisher_info_database_unittest.cc
+++ b/components/brave_rewards/browser/database/publisher_info_database_unittest.cc
@@ -61,6 +61,16 @@ class PublisherInfoDatabaseTest : public ::testing::Test {
                                int end_version) {
     const std::string file_name = "publisher_info_db_v" +
         std::to_string(start_version);
+
+    LoadDatabaseFile(temp_dir, db_file, file_name, "migration", end_version);
+  }
+
+  void LoadDatabaseFile(
+      base::ScopedTempDir* temp_dir,
+      base::FilePath* db_file,
+      const std::string& file_name,
+      const std::string& folder,
+      int end_version) {
     ASSERT_TRUE(temp_dir->CreateUniqueTempDir());
     *db_file = temp_dir->GetPath().AppendASCII(file_name);
 
@@ -69,7 +79,7 @@ class PublisherInfoDatabaseTest : public ::testing::Test {
     ASSERT_TRUE(base::PathService::Get(brave::DIR_TEST_DATA, &path));
     path = path.AppendASCII("rewards-data");
     ASSERT_TRUE(base::PathExists(path));
-    path = path.AppendASCII("migration");
+    path = path.AppendASCII(folder);
     ASSERT_TRUE(base::PathExists(path));
     path = path.AppendASCII(file_name);
     ASSERT_TRUE(base::PathExists(path));
@@ -1509,4 +1519,36 @@ TEST_F(PublisherInfoDatabaseTest, RemoveAllPendingContributions) {
   EXPECT_EQ(CountTableRows("pending_contribution"), 0);
 }
 
+TEST_F(PublisherInfoDatabaseTest,
+    ContributionQueueKeyCorrupted) {
+  base::ScopedTempDir temp_dir;
+  base::FilePath db_file;
+  LoadDatabaseFile(
+      &temp_dir,
+      &db_file,
+      "contribution_queue_key_corrupted",
+      "database",
+      9);
+  EXPECT_TRUE(publisher_info_database_->Init());
+
+  EXPECT_EQ(CountTableRows("contribution_queue"), 0);
+  EXPECT_EQ(CountTableRows("contribution_queue_publishers"), 0);
+}
+
+TEST_F(PublisherInfoDatabaseTest,
+    ContributionQueueKeyOk) {
+  base::ScopedTempDir temp_dir;
+  base::FilePath db_file;
+  LoadDatabaseFile(
+      &temp_dir,
+      &db_file,
+      "contribution_queue_key_ok",
+      "database",
+      9);
+  EXPECT_TRUE(publisher_info_database_->Init());
+
+  EXPECT_EQ(CountTableRows("contribution_queue"), 1);
+  EXPECT_EQ(CountTableRows("contribution_queue_publishers"), 1);
+}
+
 }  // namespace brave_rewards
diff --git a/test/data/rewards-data/database/contribution_queue_key_corrupted b/test/data/rewards-data/database/contribution_queue_key_corrupted
new file mode 100644
index 0000000000000000000000000000000000000000..39b634c12767bbec59c03fffa8e8aefc80123d11
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diff --git a/test/data/rewards-data/database/contribution_queue_key_ok b/test/data/rewards-data/database/contribution_queue_key_ok
new file mode 100644
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