Add complete password validation system

homework/password-check/validation.cpp

@@ -1,2 +1,56 @@
 #include "validation.hpp"
-// TODO: Put implementations here
+#include <algorithm>
+#include <cctype>
+
+std::string_view getErrorMessage(const ErrorCode code) {
+    switch (code) {
+    case ErrorCode::Ok:
+        return "Ok";
+
+    case ErrorCode::PasswordNeedsAtLeastNineCharacters:
+        return "Password needs to have at least nine characters";
+
+    case ErrorCode::PasswordNeedsAtLeastOneNumber:
+        return "Password needs to have at least one number";
+
+    case ErrorCode::PasswordNeedsAtLeastOneSpecialCharacter:
+        return "Password needs to have at least one special character";
+
+    case ErrorCode::PasswordNeedsAtLeastOneUppercaseLetter:
+        return "Password needs to have at least one uppercase letter";
+
+    case ErrorCode::PasswordsDoNotMatch:
+        return "Passwords do not match";
+
+    default:
+        return "Unknown Message";
+    }
+}
+
+bool doPasswordsMatch(const std::string_view& input_pass, const std::string_view& reference_pass) {
+    return input_pass == reference_pass;
+}
+
+ErrorCode checkPasswordRules(const std::string_view& password) {
+    if (password.size() < 9) {
+        return ErrorCode::PasswordNeedsAtLeastNineCharacters;
+    }
+    if (std::none_of(password.begin(), password.end(), [](const unsigned char c) { return std::isdigit(c); })) {
+        return ErrorCode::PasswordNeedsAtLeastOneNumber;
+    }
+    if (std::none_of(password.begin(), password.end(), [](const unsigned char c) { return std::isupper(c); })) {
+        return ErrorCode::PasswordNeedsAtLeastOneUppercaseLetter;
+    }
+    if (std::none_of(password.begin(), password.end(), [](const unsigned char c) { return std::ispunct(c); })) {
+        return ErrorCode::PasswordNeedsAtLeastOneSpecialCharacter;
+    }
+
+    return ErrorCode::Ok;
+}
+
+ErrorCode checkPassword(const std::string_view& password, const std::string_view& repeatedPassword) {
+    if (!doPasswordsMatch(password, repeatedPassword)) {
+        return ErrorCode::PasswordsDoNotMatch;
+    }
+    return checkPasswordRules(password);
+}

homework/password-check/validation.hpp

@@ -1,2 +1,19 @@
-// TODO: I'm empty :) Put enum and function headers here.
-// Don't forget the header guard - #pragma once
+#pragma once
+#include <cstdint>
+#include <string_view>
+
+enum class ErrorCode : uint8_t {
+    Ok,
+    PasswordNeedsAtLeastNineCharacters,
+    PasswordNeedsAtLeastOneNumber,
+    PasswordNeedsAtLeastOneSpecialCharacter,
+    PasswordNeedsAtLeastOneUppercaseLetter,
+    PasswordsDoNotMatch
+};
+
+[[nodiscard]] std::string_view getErrorMessage(const ErrorCode code);
+[[nodiscard]] bool doPasswordsMatch(const std::string_view& input_pass, const std::string_view& reference_pass);
+
+[[nodiscard]] ErrorCode checkPasswordRules(const std::string_view& password);
+
+[[nodiscard]] ErrorCode checkPassword(const std::string_view& password, const std::string_view& repeatedPassword);