modify drogon_ctl help command

drogon_ctl/CommandHandler.h

@@ -24,5 +24,6 @@ public:
     virtual void handleCommand(std::vector<std::string> &parameters)=0;
     virtual bool isTopCommand(){return false;}
     virtual std::string script(){return "";}
+    virtual std::string detail(){return "";}
     virtual ~CommandHandler(){}
 };

drogon_ctl/create.cc

@@ -19,7 +19,16 @@
 #include <iostream>
 #include <memory>
 using namespace drogon_ctl;
-
+std::string create::detail()
+{
+    return "Use create command to create some source files of drogon webapp\n"
+           "Usage:drogon_ctl create <view|controller> [-options] <object name>\n"
+           "drogon_ctl create view <csp file name> //create HttpView source files from csp file\n"
+           "drogon_ctl create controller [-s] [-n <namespace>] <class_name> //"
+           "create HttpSimpleController source files\n"
+           "drogon_ctl create controller -a <[namespace::]class_name> //"
+           "create HttpApiController source files\n";
+}
 
 void create::handleCommand(std::vector<std::string> &parameters)
 {

drogon_ctl/create.h

@@ -25,5 +25,6 @@ namespace drogon_ctl
         virtual void handleCommand(std::vector<std::string> &parameters) override;
         virtual std::string script() override {return "create controller or view class files";}
         virtual bool isTopCommand() override {return true;}
+        virtual std::string detail() override;
     };
 }

drogon_ctl/create_controller.h

@@ -23,8 +23,7 @@ namespace drogon_ctl
     {
     public:
         virtual void handleCommand(std::vector<std::string> &parameters) override;
-        std::string script(){return "create controller files";}
-
+        virtual std::string script() override {return "create controller files";}
     protected:
         enum ControllerType{
             Simple=0,

drogon_ctl/help.cc

@@ -19,6 +19,8 @@
 using namespace drogon_ctl;
 void help::handleCommand(std::vector<std::string> &parameters)
 {
+    if(parameters.size()==0)
+    {
         std::cout<<"usage: drogon_ctl <command> [<args>]"<<std::endl;
         std::cout<<"commands list:"<<std::endl;
         for(auto className:drogon::DrClassMap::getAllClassName())
@@ -42,4 +44,22 @@ void help::handleCommand(std::vector<std::string> &parameters)
                 }
             }
         }
+    }
+    else
+    {
+        auto cmd=std::string("drogon_ctl::")+parameters[0];
+
+        auto classPtr=std::shared_ptr<DrObjectBase>(drogon::DrClassMap::newObject(cmd));
+        if(classPtr)
+        {
+            auto cmdHdlPtr=std::dynamic_pointer_cast<CommandHandler>(classPtr);
+            if(cmdHdlPtr)
+            {
+                if(cmdHdlPtr->isTopCommand())
+                    std::cout<<cmdHdlPtr->detail()<<std::endl;
+
+            }
+        }
+
+    }
 }