chore: Remove old Anhang and add some code to the docs

projektdokumentation/Listings/UserEntity.java

@@ -0,0 +1,92 @@
+package de.szut.casino.user;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.math.BigDecimal;
+
+@Setter
+@Getter
+@Entity
+@NoArgsConstructor
+public class UserEntity {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Version
+    private Long version;
+
+    @Column(unique = true)
+    private String email;
+
+    @Column(unique = true)
+    private String username;
+
+    private String password;
+
+    @Column(precision = 19, scale = 2)
+    private BigDecimal balance;
+
+    private Boolean emailVerified = false;
+
+    private String verificationToken;
+
+    private String passwordResetToken;
+
+    @Enumerated(EnumType.STRING)
+    private AuthProvider provider = AuthProvider.LOCAL;
+
+    private String providerId;
+
+    public UserEntity(String email, String username, String password, BigDecimal balance, String verificationToken) {
+        this.email = email;
+        this.username = username;
+        this.password = password;
+        this.balance = balance;
+        this.verificationToken = verificationToken;
+    }
+
+    public UserEntity(String email, String username, AuthProvider provider, String providerId, BigDecimal balance) {
+        this.email = email;
+        this.username = username;
+        this.provider = provider;
+        this.providerId = providerId;
+        this.balance = balance;
+        this.emailVerified = true; // OAuth providers verify emails
+    }
+
+    public void addBalance(BigDecimal amountToAdd) {
+        if (amountToAdd == null || amountToAdd.compareTo(BigDecimal.ZERO) <= 0) {
+            return;
+        }
+
+        if (this.balance == null) {
+            this.balance = BigDecimal.ZERO;
+        }
+
+        this.balance = this.balance.add(amountToAdd);
+    }
+
+    public void subtractBalance(BigDecimal amountToSubtract) {
+        if (amountToSubtract == null || amountToSubtract.compareTo(BigDecimal.ZERO) <= 0) {
+            throw new IllegalArgumentException("Amount to subtract must be positive.");
+        }
+
+        if (this.balance == null) {
+            this.balance = BigDecimal.ZERO;
+        }
+
+        if (this.balance.compareTo(amountToSubtract) < 0) {
+            throw new IllegalStateException("Insufficient funds to subtract " + amountToSubtract);
+        }
+
+        this.balance = this.balance.subtract(amountToSubtract);
+    }
+
+    public String getEmailAddress() {
+        return "${name} <${email}>".replace("${name}", this.username).replace("${email}", this.email);
+    }
+}