স্প্রিং সিকিউরিটিঃ UserDetailsService দিয়ে ইউজার অথেনটিকেশন

@Entity
public class User implements UserDetails {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String name;
    @NotNull
    @Column(unique = true)
    private String email;
    private String password;
    private String token;
    @Embedded
    private Address address;
    private String phoneNumber;
    private boolean enabled = true;
    private boolean accountNonExpired = true;
    private boolean accountNonLocked;
    private boolean credentialsNonExpired = true;
    @ElementCollection(fetch = FetchType.EAGER)
    private Collection<String> roles;


    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        List<GrantedAuthority> authorityList = new ArrayList<>();
        this.roles.forEach(r -> {
            authorityList.add(new SimpleGrantedAuthority(r));
        });
        return authorityList;
    }

    @Override
    public String getPassword() {
        return this.password;
    }

    @Override
    public String getUsername() {
        return this.email;
    }

    @Override
    public boolean isAccountNonExpired() {
        return this.accountNonExpired;
    }

    @Override
    public boolean isAccountNonLocked() {
        return this.accountNonLocked;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return this.credentialsNonExpired;
    }

    @Override
    public boolean isEnabled() {
        return this.enabled;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getEmail() {
        return this.email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getToken() {
        return token;
    }

    public void setToken(String token) {
        this.token = token;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }

    public void setAccountNonExpired(boolean accountNonExpired) {
        this.accountNonExpired = accountNonExpired;
    }

    public void setAccountNonLocked(boolean accountNonLocked) {
        this.accountNonLocked = accountNonLocked;
    }

    public void setCredentialsNonExpired(boolean credentialsNonExpired) {
        this.credentialsNonExpired = credentialsNonExpired;
    }

    public Collection getRoles() {
        return this.roles;
    }

    public void setRoles(Collection<String> roles) {
        this.roles = roles;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

@Service
public class CustomUserDetailsService implements UserDetailsService {
    @Autowired
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = this.userService.findByEmail(username);
        if (user == null) throw new UsernameNotFoundException("No user found with this email " + username);
        return user;
    }
}

@Entity
public class User  {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String name;
    @NotNull
    @Column(unique = true)
    private String email;
    private String password;
    private String token;
    @Embedded
    private Address address;
    private String phoneNumber;
    private boolean enabled = true;
    private boolean accountNonExpired = true;
    private boolean accountNonLocked;
    private boolean credentialsNonExpired = true;
    @ElementCollection(fetch = FetchType.EAGER)
    private Collection<String> roles;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getToken() {
        return token;
    }

    public void setToken(String token) {
        this.token = token;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public boolean isEnabled() {
        return enabled;
    }

    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }

    public boolean isAccountNonExpired() {
        return accountNonExpired;
    }

    public void setAccountNonExpired(boolean accountNonExpired) {
        this.accountNonExpired = accountNonExpired;
    }

    public boolean isAccountNonLocked() {
        return accountNonLocked;
    }

    public void setAccountNonLocked(boolean accountNonLocked) {
        this.accountNonLocked = accountNonLocked;
    }

    public boolean isCredentialsNonExpired() {
        return credentialsNonExpired;
    }

    public void setCredentialsNonExpired(boolean credentialsNonExpired) {
        this.credentialsNonExpired = credentialsNonExpired;
    }

    public Collection<String> getRoles() {
        return roles;
    }

    public void setRoles(Collection<String> roles) {
        this.roles = roles;
    }
}

@Service
public class CustomUserDetailsService implements UserDetailsService {
    @Autowired
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = this.userService.findByEmail(username);
        if (user == null) throw new UsernameNotFoundException("No user found with this email " + username);
        return new SecurityUser(user);
    }

    class SecurityUser extends User implements UserDetails{
        private User user;

        public SecurityUser(User user){
            this.user = user;
        }

        @Override
        public Collection<? extends GrantedAuthority> getAuthorities() {
            List<GrantedAuthority> authorityList = new ArrayList<>();
            this.user.getRoles().forEach(r -> {
                authorityList.add(new SimpleGrantedAuthority(r));
            });
            return authorityList;
        }

        @Override
        public String getPassword() {
            return this.user.getPassword();
        }

        @Override
        public String getUsername() {
            return this.user.getEmail();
        }

        @Override
        public boolean isAccountNonExpired() {
            return this.user.isAccountNonExpired();
        }

        @Override
        public boolean isAccountNonLocked() {
            return this.user.isAccountNonLocked();
        }

        @Override
        public boolean isCredentialsNonExpired() {
            return this.user.isCredentialsNonExpired();
        }

        @Override
        public boolean isEnabled() {
            return this.user.isEnabled();
        }
    }
}