ValidationStrategy.h

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#ifndef VALIDATIONSTRATEGY_H
#define VALIDATIONSTRATEGY_H
 
#include <QRegularExpressionValidator>
#include <QString>
 
class IValidationStrategy
{
public:
    virtual bool isValid(const QString& input) const = 0;
 
    virtual QString errorMessage() const = 0;
};
 
class NameValidationStrategy : public IValidationStrategy
{
public:
    bool isValid(const QString& input) const override
    {
        const QRegularExpression namePattern(R"((^[A-Za-z]*$))");
        return namePattern.match(input).hasMatch();
    }
 
    QString errorMessage() const override
    {
        return "Invalid name format";
    }
};
 
class EmailValidationStrategy : public IValidationStrategy
{
public:
    bool isValid(const QString& input) const override
    {
        const QRegularExpression emailPattern(R"((^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$))");
        return emailPattern.match(input).hasMatch();
    }
 
    QString errorMessage() const override
    {
        return "Invalid email format";
    }
};
 
class PasswordValidationStrategy : public IValidationStrategy
{
public:
    bool isValid(const QString& input) const override
    {
        const QRegularExpression passwordPattern(R"((?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,})");
        return passwordPattern.match(input).hasMatch();
    }
 
    QString errorMessage() const override
    {
        return "Password must contain at least 8 characters, 1 digit, 1 lowercase, and 1 uppercase";
    }
};
 
class BalanceValidationStrategy : public IValidationStrategy
{
public:
    bool isValid(const QString& input) const override
    {
        const QRegularExpression balancePattern(R"((^[0-9]*$))");
        return balancePattern.match(input).hasMatch();
    }
 
    QString errorMessage() const override
    {
        return "Invalid balance format";
    }
};
 
class AccountNumberValidationStrategy : public IValidationStrategy
{
public:
    bool isValid(const QString& input) const override
    {
        const QRegularExpression accountNumberPattern(R"((^[0-9]{6}$))");
        return accountNumberPattern.match(input).hasMatch();
    }
 
    QString errorMessage() const override
    {
        return "Account number must contain 10 digits";
    }
};
 
#endif // VALIDATIONSTRATEGY_H