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reply.hpp
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290 lines (248 loc) · 5.56 KB
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// The MIT License (MIT)
//
// Copyright (c) 2015-2017 Simon Ninon <simon.ninon@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#pragma once
#include <iostream>
#include <string>
#include <vector>
#include <cpp_redis/misc/optional.hpp>
#include <cpp_redis/types/common_types.hpp>
#include <cstdint>
namespace cpp_redis {
//!
//! cpp_redis::reply_t is the class that wraps Redis server replies.
//! That is, cpp_redis::reply_t objects are passed as parameters of commands
//! callbacks and contain the server's response.
//!
//!
class reply {
public:
#define __CPP_REDIS_REPLY_ERR 0
#define __CPP_REDIS_REPLY_BULK 1
#define __CPP_REDIS_REPLY_SIMPLE 2
#define __CPP_REDIS_REPLY_NULL 3
#define __CPP_REDIS_REPLY_INT 4
#define __CPP_REDIS_REPLY_ARRAY 5
//!
//! type of reply, based on redis server standard replies
//!
//!
enum class type {
error = __CPP_REDIS_REPLY_ERR,
bulk_string = __CPP_REDIS_REPLY_BULK,
simple_string = __CPP_REDIS_REPLY_SIMPLE,
null = __CPP_REDIS_REPLY_NULL,
integer = __CPP_REDIS_REPLY_INT,
array = __CPP_REDIS_REPLY_ARRAY
};
//!
//! specific type of replies for string-based replies
//!
//!
enum class string_type {
error = __CPP_REDIS_REPLY_ERR,
bulk_string = __CPP_REDIS_REPLY_BULK,
simple_string = __CPP_REDIS_REPLY_SIMPLE
};
public:
//!
//! default ctor (set a null reply)
//!
//!
reply();
//!
//! ctor for string values
//!
//! @param value string value
//! @param reply_type of string reply
//!
//!
reply(const string_t &value, string_type reply_type);
//!
//! ctor for int values
//!
//! @param value integer value
//!
//!
explicit reply(int_t value);
//!
//! ctor for array values
//!
//! @param rows array reply
//! @return current instance
//!
//!
explicit reply(const vector<reply> &rows);
//!
//! dtor
//!
//!
~reply() = default;
//!
//! copy ctor
//!
//!
reply(const reply &) = default;
//!
//! assignment operator
//!
//!
reply &operator=(const reply &) = default;
//!
//! move ctor
//!
//!
reply(reply &&) noexcept;
//!
//! move assignment operator
//!
//!
reply &operator=(reply &&) noexcept;
public:
//!
//! @return whether the reply is an array
//!
//!
bool is_array() const;
//!
//! @return whether the reply is a string (simple, bulk, error)
//!
//!
bool is_string() const;
//!
//! @return whether the reply is a simple string
//!
//!
bool is_simple_string() const;
//!
//! @return whether the reply is a bulk string
//!
//!
bool is_bulk_string() const;
//!
//! @return whether the reply is an error
//!
//!
bool is_error() const;
//!
//! @return whether the reply is an integer
//!
//!
bool is_integer() const;
//!
//! @return whether the reply is null
//!
//!
bool is_null() const;
public:
//!
//! @return true if function is not an error
//!
//!
bool ok() const;
//!
//! @return true if function is an error
//!
//!
bool ko() const;
//!
//! convenience implicit conversion, same as !is_null() / ok()
//!
//!
explicit operator bool() const;
public:
optional_t<int_t> try_get_int() const;
public:
//!
//! @return the underlying error
//!
//!
const string_t &error() const;
//!
//! @return the underlying array
//!
//!
const vector<reply> &as_array() const;
//!
//! @return the underlying string
//!
//!
const string_t &as_string() const;
//!
//! @return the underlying integer
//!
//!
int_t as_integer() const;
public:
//!
//! set reply as null
//!
//!
void set();
//!
//! set a string reply
//!
//! @param value string value
//! @param reply_type of string reply
//!
//!
void set(const string_t &value, string_type reply_type);
//!
//! set an integer reply
//!
//! @param value integer value
//!
//!
void set(int_t value);
//!
//! set an array reply
//!
//! @param rows array reply
//!
//!
void set(const vector<reply> &rows);
//!
//! for array replies, add a new row to the reply
//!
//! @param reply new row to be appended
//! @return current instance
//!
//!
reply &operator<<(const reply &reply);
public:
//!
//! @return reply type
//!
//!
type get_type() const;
private:
type m_type;
vector<cpp_redis::reply> m_rows;
string_t m_str_val;
int_t m_int_val;
};
using reply_t = reply;
} // namespace cpp_redis
//!
//! support for output
//!
//!
std::ostream &operator<<(std::ostream &os, const cpp_redis::reply_t &reply);