176 lines
4.6 KiB
C++
176 lines
4.6 KiB
C++
#include "Session.h"
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#include "Util.h"
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#include "json.hpp"
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#include "jsonfail.h"
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using namespace std;
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using json=nlohmann::json;
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#define postval(NAME) string NAME=req.post[#NAME]
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int main()
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{
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Request req;
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Session se(req);
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Response res;
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json j;
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auto jsonfail=[&](int errcode,const string& detail="")
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{
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j["success"]=0;
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j["errcode"]=errcode;
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j["errmsg"]=string(GetErrMsg(errcode))+" : "+detail;
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};
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do
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{
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if(!se.isReady()||se.isNew()||se.getUser().empty())
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{
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jsonfail(err_need_login);
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break;
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}
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if(req.requestMethod!="POST")
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{
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jsonfail(err_method_not_supported);
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break;
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}
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if(req.post["booktype_old"].empty() ||
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req.post["booktype_new"].empty())
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{
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jsonfail(err_missing_parameter);
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break;
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}
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postval(booktype_old);
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postval(booktype_new);
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DBInfo db;
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MySQLConn conn;
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if(db.readConfig()<0)
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{
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jsonfail(err_config);
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break;
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}
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if(db.connectProxy(conn)<0)
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{
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jsonfail(err_connect);
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break;
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}
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/// Check Permission
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int permission_level;
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if(conn.exec(make_str("select permission_level from bs_user where username='",
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se.getUser(),
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"'"),
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[&](MySQLResult& res)
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{
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res.stepRow([&](char** val,unsigned long* len)
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{
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permission_level=ParseInt(val[0]);
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});
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})<0)
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{
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jsonfail(err_sql,"Step 1");
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break;
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}
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if(permission_level>1)
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{
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/// Permission Denied.
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jsonfail(err_permission_denied);
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break;
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}
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int count_old;
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if(conn.exec(make_str("select count(book_type) from bs_booktype where book_type='",
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booktype_old,
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"'"),
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[&](MySQLResult& res)
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{
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res.stepRow([&](char** val,unsigned long* len)
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{
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count_old=ParseInt(val[0]);
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});
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})<0)
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{
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jsonfail(err_sql,"Step 2");
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break;
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}
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if(count_old!=1)
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{
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jsonfail(err_data,"old value incorrect");
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break;
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}
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int count_new;
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if(conn.exec(make_str("select count(book_type) from bs_booktype where booktype='",
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booktype_new,
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"'"),
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[&](MySQLResult& res)
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{
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res.stepRow([&](char** val,unsigned long* len)
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{
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count_new=ParseInt(val[0]);
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});
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})<0)
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{
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jsonfail(err_sql,"Step 3");
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break;
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}
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if(count_new!=0)
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{
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jsonfail(err_data,"new value conflict");
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break;
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}
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int count_old_ref;
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if(conn.exec(make_str("select count(book_type) from bs_book where book_type='",
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booktype_old,
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"'"),
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[&](MySQLResult& res)
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{
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res.stepRow([&](char** val,unsigned long* len)
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{
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count_old_ref=ParseInt(val[0]);
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});
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})<0)
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{
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jsonfail(err_sql,"Step 4");
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break;
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}
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if(count_old_ref!=0)
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{
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jsonfail(err_data,"old value reference count not equals 0");
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break;
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}
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/// do update
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if(conn.exec(make_str("update bs_booktype set book_type='",
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booktype_new,
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"' where book_type='",
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booktype_old,
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"'"),nullptr)<0)
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{
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jsonfail(err_sql,"Step 5");
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break;
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}
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if(conn.getAffectedRows()!=1)
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{
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jsonfail(err_sql_logic,"Affected rows not equals 1");
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break;
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}
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j["success"]=1;
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}while(0);
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res.content.append(j.dump());
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res.show();
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return 0;
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}
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