Initial commit

src/main/java/com/mzh/library/entity/AuthenticatedUser.java

@@ -0,0 +1,61 @@
+package com.mzh.library.entity;
+
+import java.io.Serializable;
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class AuthenticatedUser implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    private final long id;
+    private final String username;
+    private final String displayName;
+    private final Role role;
+    private final Set<Permission> permissions;
+
+    public AuthenticatedUser(long id, String username, String displayName, Role role, Set<Permission> permissions) {
+        this.id = id;
+        this.username = username;
+        this.displayName = displayName;
+        this.role = role;
+        this.permissions = Collections.unmodifiableSet(new LinkedHashSet<>(permissions));
+    }
+
+    public static AuthenticatedUser from(User user, Set<Permission> permissions) {
+        return new AuthenticatedUser(
+            user.getId(),
+            user.getUsername(),
+            user.getDisplayName(),
+            user.getRole(),
+            permissions
+        );
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public Role getRole() {
+        return role;
+    }
+
+    public Set<Permission> getPermissions() {
+        return permissions;
+    }
+
+    public Set<String> getPermissionCodes() {
+        return permissions.stream()
+            .map(Permission::getCode)
+            .collect(Collectors.toCollection(LinkedHashSet::new));
+    }
+}

src/main/java/com/mzh/library/entity/Permission.java

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+package com.mzh.library.entity;
+
+public enum Permission {
+    MANAGE_USERS("manage_users"),
+    MANAGE_BOOKS("manage_books"),
+    MANAGE_READERS("manage_readers"),
+    MANAGE_BORROWING("manage_borrowing"),
+    VIEW_REPORTS("view_reports"),
+    VIEW_SYSTEM_LOGS("view_system_logs"),
+    VIEW_CATALOG("view_catalog"),
+    BORROW_BOOKS("borrow_books");
+
+    private final String code;
+
+    Permission(String code) {
+        this.code = code;
+    }
+
+    public String getCode() {
+        return code;
+    }
+}

src/main/java/com/mzh/library/entity/Role.java

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+package com.mzh.library.entity;
+
+import java.util.Locale;
+
+public enum Role {
+    ADMINISTRATOR("administrator", "Administrator"),
+    LIBRARIAN("librarian", "Librarian"),
+    READER("reader", "Reader");
+
+    private final String code;
+    private final String displayName;
+
+    Role(String code, String displayName) {
+        this.code = code;
+        this.displayName = displayName;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public static Role fromCode(String code) {
+        if (code == null || code.trim().isEmpty()) {
+            throw new IllegalArgumentException("Role code is required");
+        }
+
+        String normalized = code.trim().toLowerCase(Locale.ROOT);
+        for (Role role : values()) {
+            if (role.code.equals(normalized)) {
+                return role;
+            }
+        }
+
+        throw new IllegalArgumentException("Unsupported role code: " + code);
+    }
+}

src/main/java/com/mzh/library/entity/User.java

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+package com.mzh.library.entity;
+
+public class User {
+    private long id;
+    private String username;
+    private String passwordHash;
+    private String displayName;
+    private Role role;
+    private boolean active;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPasswordHash() {
+        return passwordHash;
+    }
+
+    public void setPasswordHash(String passwordHash) {
+        this.passwordHash = passwordHash;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public void setDisplayName(String displayName) {
+        this.displayName = displayName;
+    }
+
+    public Role getRole() {
+        return role;
+    }
+
+    public void setRole(Role role) {
+        this.role = role;
+    }
+
+    public boolean isActive() {
+        return active;
+    }
+
+    public void setActive(boolean active) {
+        this.active = active;
+    }
+}