feat:add key del cmd (#62)

* resolve conflicts

* resolve conflicts

* variable init

* fix merge wrong

* resolve conflits

* resolve conflict

* code format

* create keyspace cmd file

* add del cmd

* code format

* code format

* delete useless files

* delete useless files

src/base_cmd.h

@@ -21,6 +21,9 @@ namespace pikiwidb {
 
 // command definition
 
+// key cmd
+const std::string kCmdNameDel = "del";
+
 // string cmd
 const std::string kCmdNameSet = "set";
 const std::string kCmdNameGet = "get";

src/cmd_keys.cc

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2023-present, Qihoo, Inc.  All rights reserved.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#include "cmd_keys.h"
+#include "store.h"
+
+namespace pikiwidb {
+
+DelCmd::DelCmd(const std::string& name, int16_t arity)
+    : BaseCmd(name, arity, CmdFlagsWrite, AclCategoryWrite | AclCategoryKeyspace) {}
+
+bool DelCmd::DoInitial(PClient* client) {
+  client->SetKey(client->argv_[1]);
+  return true;
+}
+
+void DelCmd::DoCmd(PClient* client) {
+  if (PSTORE.DeleteKey(client->Key())) {
+    PSTORE.ClearExpire(client->Key());
+    client->AppendInteger(1);
+  } else {
+    client->AppendInteger(0);
+  }
+}
+}  // namespace pikiwidb

src/cmd_keys.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2023-present, Qihoo, Inc.  All rights reserved.
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#pragma once
+
+#include "base_cmd.h"
+
+namespace pikiwidb {
+
+class DelCmd : public BaseCmd {
+ public:
+  DelCmd(const std::string& name, int16_t arity);
+
+ protected:
+  bool DoInitial(PClient* client) override;
+
+ private:
+  void DoCmd(PClient* client) override;
+};
+
+}  // namespace pikiwidb

src/cmd_kv.cc

@@ -456,4 +456,4 @@ void SetnxCmd::DoCmd(PClient* client) {
   }
 }
 
-}  // namespace pikiwidb
+}  // namespace pikiwidb

src/cmd_table_manager.cc

@@ -8,6 +8,7 @@
 #include "cmd_table_manager.h"
 #include <memory>
 #include "cmd_admin.h"
+#include "cmd_keys.h"
 #include "cmd_kv.h"
 
 namespace pikiwidb {
@@ -27,6 +28,10 @@ void CmdTableManager::InitCmdTable() {
 
   cmds_->insert(std::make_pair(kCmdNameConfig, std::move(configPtr)));
 
+  // keyspace
+  std::unique_ptr<BaseCmd> delPtr = std::make_unique<DelCmd>(kCmdNameDel, -2);
+  cmds_->insert(std::make_pair(kCmdNameDel, std::move(delPtr)));
+
   // kv
   std::unique_ptr<BaseCmd> getPtr = std::make_unique<GetCmd>(kCmdNameGet, 2);
   cmds_->insert(std::make_pair(kCmdNameGet, std::move(getPtr)));