Added CommandPrivate class and updated the README with usage instructions.

CMakeLists.txt

@@ -28,7 +28,8 @@ include_directories(include)
 
 # QRedis source files.
 set(QREDIS_SRC
-    src/client.cpp)
+    src/client.cpp
+    src/command.cpp)
 
 # QRedis header files requiring MOC.
 qt5_wrap_cpp(QREDIS_MOC

README.md

@@ -36,4 +36,15 @@ QRedis uses [CMake](http://www.cmake.org/) for building the client library, whic
 
 ### Usage
 
-[TODO]
+In order to send commands to a Redis server, you need to create an instance of the `Client` class and connect to the server. For example, if Redis is running on the same server as your application, your code might look something like this:
+
+    #include <qredis/client.h>
+    
+    QRedis::Client client;
+    client.connectToHost(QHostAddress::LocalHost);
+
+Once the connection is complete, the client will emit the `connected()` signal. You can then begin executing commands. For example, to send the `PING` command:
+
+    QRedis::Command * command = client.sendCommand("PING");
+
+The `sendCommand()` method returns a `Command *`, which provides signals to indicate when the command has completed or when an error occurs.

include/qredis/client.h

@@ -22,13 +22,13 @@ namespace QRedis
         public:
             
             /**
-             * @brief Connects to a Redis server
+             * @brief Creates a Redis client
              * @param parent the parent QObject
              */
             explicit Client(QObject * parent = nullptr);
 
             /**
-             * @brief Disconnects from the Redis server
+             * @brief Destroys the client
              */
             virtual ~Client();
 
@@ -49,9 +49,10 @@ namespace QRedis
 
             /**
              * @brief Sends the specified command to the Redis server.
+             * @param command the command to execute
              * @return an object that may be used for obtaining the response
              */
-            Command * sendCommand();
+            Command * sendCommand(const QString & command);
 
         signals:
 

include/qredis/command.h

@@ -1,15 +1,40 @@
 #ifndef QREDIS_COMMAND_H
 #define QREDIS_COMMAND_H
 
+#include <QObject>
+#include <QScopedPointer>
+
 #include "qredis_export.h"
 
 namespace QRedis
 {
-    class QREDIS_EXPORT Command
+    class QREDIS_EXPORT CommandPrivate;
+
+    /**
+     * @brief Represents a specific command and its response.
+     */
+    class QREDIS_EXPORT Command : public QObject
     {
         public:
 
-            //...
+            /**
+             * @brief Creates a command
+             * @param parent
+             */
+            explicit Command(QObject * parent = nullptr);
+
+            /**
+             * @brief Destroys the command
+             */
+            virtual ~Command();
+
+        signals:
+
+            void completed();
+
+        private:
+
+            const QScopedPointer<CommandPrivate> d;
     };
 }
 

src/client.cpp

@@ -24,7 +24,7 @@ void Client::disconnectFromHost()
     d->socket.disconnectFromHost();
 }
 
-Command * Client::sendCommand()
+Command * Client::sendCommand(const QString & command)
 {
-    return nullptr;
+    return new Command(this);
 }

src/command.cpp

@@ -0,0 +1,13 @@
+#include <qredis/command.h>
+#include "command_p.h"
+
+using namespace QRedis;
+
+Command::Command(QObject * parent)
+    : QObject(parent), d(new CommandPrivate)
+{
+}
+
+Command::~Command()
+{
+}

src/command_p.h

@@ -0,0 +1,14 @@
+#ifndef QREDIS_COMMAND_P_H
+#define QREDIS_COMMAND_P_H
+
+namespace QRedis
+{
+    class CommandPrivate
+    {
+        public:
+
+            //...
+    };
+}
+
+#endif // QREDIS_COMMAND_P_H