user.cpp

/*******************************************************************************
 * Copyright (c) 2025, Jan Koester jan.koester@gmx.net
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
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 *      names of its contributors may be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 *******************************************************************************/

#include "types.h"
#include "user.h"

namespace authdb {
    inline const char *getUserData(const AuthData *dat,AuthData::Record **varclass,const char *varname){
        if(*varclass && (*varclass)->data ){
            return (*varclass)->data;
        }else{
            for(const AuthData *curdat=dat; curdat; curdat=curdat->next()){
                if(curdat->Data && strcmp(curdat->Data->fieldname,varname)==0){
                    *varclass=curdat->Data;
                    return curdat->Data->data;
                }
            }
        }
        std::string err;
        err=varname;
        err+=" data not found !";
        throw(authdb::AuthBackendError(err.c_str()));
    }

    inline void setUserData(AuthData *dat,AuthData::Record **varclass,const char *varname,const char *value){
        AuthData::Record *target=*varclass;

        AuthData *curec=dat;

        if(!target){
            while(curec){
                if(curec->Data->type == authdb::UserData &&
                    uuid_compare(curec->Data->uuid,dat->Data->uuid)==0 &&
                    strcmp(curec->Data->fieldname,varname)==0
                ){

                    target=curec->Data;
                    target->datasize=0;
                    delete[] target->data;
                    target->data=nullptr;
                    break;
                }
                curec=curec->next();
            }
        }

        if(!target){
            target=new AuthData::Record;
        }

        target->start=0xFE;
        uuid_copy(target->uuid,dat->Data->uuid);
        target->type=DataType::UserData;
        target->storage=StorageType::TextStorage;

        snprintf(target->fieldname,255,"%s",varname);
        target->datasize=strlen(value)+1;
        target->data= new char[target->datasize];
        strcpy(target->data,value);

        *varclass=dat->append(*target)->Data;
    }

};



authdb::UserData::UserData(uuid_t id){
    Data = new AuthData(id);
    Data->Data->type=authdb::UserData;
    username=nullptr;
    firstname=nullptr;
    lastname=nullptr;
    mail=nullptr;
    pwhash=nullptr;
    avatar=nullptr;
    uuid_copy(uid,id);
}

authdb::UserData::~UserData(){
    delete Data;
}

void authdb::UserData::setFirstName(const char* src){
   setUserData(this->Data,&firstname,"firstname",src);
}

const char *authdb::UserData::getFirstname(){
    return getUserData(this->Data,&firstname,"firstname");
}


void authdb::UserData::setLastName(const char* src){
    setUserData(this->Data,&lastname,"lastname",src);
}

const char * authdb::UserData::getLastname(){
    return getUserData(this->Data,&lastname,"lastname");
}


void authdb::UserData::setMail(const char* src){
  setUserData(this->Data,&mail,"mail",src);
}

const char *authdb::UserData::getMail(){
    return getUserData(this->Data,&mail,"mail");
}


void authdb::UserData::setPwHash(const char* src){
    setUserData(this->Data,&pwhash,"pwhash",src);
}

const char * authdb::UserData::getPwHash(){
    return getUserData(this->Data,&pwhash,"pwhash");
}


void authdb::UserData::setUserName(const char* src){
    setUserData(this->Data,&username,"username",src);
}

const char * authdb::UserData::getUsername(){
    return getUserData(this->Data,&username,"username");
}

void authdb::UserData::setAvatar(const std::vector<char>& src){
   AuthData::Record *target=avatar;

   AuthData *curec=Data;

   if(!target){
        while(curec){
            if(curec->Data->type == authdb::UserData &&
                uuid_compare(curec->Data->uuid,uid)==0 &&
                strcmp(curec->Data->fieldname,"avatar")==0
             ){

                target=curec->Data;
                target->datasize=0;
                delete[] target->data;
                target->data=nullptr;
                break;
            }
            curec=curec->next();
        }
    }

    if(!target){
      AuthData::Record newrec;
      target=Data->append(newrec)->Data;
    }


    target->type=DataType::UserData;
    target->storage=StorageType::BinaryStorage;

    snprintf(target->fieldname,255,"%s","avatar");
    target->datasize=src.size();
    target->data= new char[target->datasize];
    memcpy(target->data,src.data(),target->datasize);

    avatar=target;
}

void authdb::UserData::getAvatar(std::vector<char>& dest){
    if(avatar && avatar->data)
        std::copy(avatar->data,avatar->data+avatar->datasize,
                  std::back_inserter(dest));
    else
        throw(authdb::AuthBackendError("Avatar data nout found !"));
}

void authdb::User::create(AuthBackend &backend,class UserData* dat){

    int exi=0;

    if(exits(backend,&dat->uid,dat->getUsername(),exi)){
       switch(exi){
           case 1:
                throw authdb::AuthBackendError("Create User: Username already Exists aborting!");
           default:
                throw authdb::AuthBackendError("Create User: UUID already Exists aborting!");
       }
    }

    size_t wd=backend.end();

    for(AuthData *curec=dat->Data; curec; curec=curec->next()){
         curec->Data->type=UserData;
         backend.setPos(wd);
         backend.write((unsigned char*)curec->Data,sizeof(struct AuthData::Record));
         backend.write((unsigned char*)curec->Data->data,curec->Data->datasize);
         wd=backend.end();
    }

}

bool authdb::User::exits(AuthBackend& backend, uuid_t* uid, const char* name,int &ret){
    authdb::AuthData::Record cur;

    size_t rd=sizeof(authdb::AuthHeader),end=backend.end();

    while(rd<end){
        backend.setPos(rd);
        backend.read((unsigned char*)&cur,sizeof(AuthData::Record));
        rd=backend.getPos()+cur.datasize;
        if(strcmp(cur.fieldname,"username")==0 ){
            cur.data=new char[cur.datasize];
            backend.read((unsigned char*)cur.data,cur.datasize);
            if(name && strcmp(cur.data,name) == 0){
                delete[] cur.data;
                ret=1;
                return true;

            }else if(uid && uuid_compare(cur.uuid,*uid)==0){
                delete[] cur.data;
                ret=2;
                return true;
            }
            delete[] cur.data;
        }
    }
    ret=-1;
    return false;
}


void authdb::User::edit(AuthBackend &backend,class UserData& dat, size_t &pos){
}

void authdb::User::remove(AuthBackend &backend,const uuid_t uid){
    delRecord(backend,uid);
}

void authdb::User::info(AuthBackend &backend, class UserData& dat, size_t &pos){
    size_t end=backend.end();

    if(uuid_is_null(dat.uid))
        throw AuthBackendError("user info uid required!");

    while(pos<end){
        authdb::AuthData::Record *cur=new AuthData::Record;
        backend.setPos(pos);
        backend.read((unsigned char*)cur,sizeof(AuthData::Record));
        pos=backend.getPos()+cur->datasize;
        if(cur->type == UserData && uuid_compare(dat.uid,cur->uuid) == 0){

            if(!getRecord(backend,*dat.Data,DataType::UserData))
                continue;

            if(strcmp(dat.Data->Data->fieldname,"username")==0){
                dat.username=dat.Data->Data;
            }else if(strcmp(dat.Data->Data->fieldname,"firstname")==0){
                dat.firstname=dat.Data->Data;
            }else if(strcmp(dat.Data->Data->fieldname,"lastname")==0){
                dat.lastname=dat.Data->Data;
            }else if(strcmp(dat.Data->Data->fieldname,"mail")==0){
                dat.mail=dat.Data->Data;
            }else if(strcmp(dat.Data->Data->fieldname,"pwhash")==0){
                dat.pwhash=dat.Data->Data;
            }else if(strcmp(dat.Data->Data->fieldname,"avatar")==0){
                dat.avatar=dat.Data->Data;
            }
        }
        delete cur;
    }
}