feat: seed default admin account on startup

src/main/java/com/slotline/config/AdminBootstrap.java

@@ -0,0 +1,46 @@
+package com.slotline.config;
+
+import com.slotline.organization.Organization;
+import com.slotline.organization.OrganizationService;
+import com.slotline.user.Role;
+import com.slotline.user.User;
+import com.slotline.user.UserRepository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.ApplicationArguments;
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Component;
+
+import java.time.Instant;
+
+@Component
+public class AdminBootstrap implements ApplicationRunner {
+
+    private static final Logger log = LoggerFactory.getLogger(AdminBootstrap.class);
+
+    private final UserRepository users;
+    private final OrganizationService organizations;
+    private final PasswordEncoder passwordEncoder;
+    private final SlotlineProperties properties;
+
+    public AdminBootstrap(UserRepository users, OrganizationService organizations, PasswordEncoder passwordEncoder,
+                          SlotlineProperties properties) {
+        this.users = users;
+        this.organizations = organizations;
+        this.passwordEncoder = passwordEncoder;
+        this.properties = properties;
+    }
+
+    @Override
+    public void run(ApplicationArguments args) {
+        String username = properties.getAdmin().getUsername();
+        if (users.existsByUsername(username)) {
+            return;
+        }
+        Organization defaultOrganization = organizations.requireBySlug(OrganizationService.defaultSlug);
+        String passwordHash = passwordEncoder.encode(properties.getAdmin().getPassword());
+        users.save(new User(defaultOrganization.getId(), username, passwordHash, Role.ADMIN, Instant.now()));
+        log.info("Seeded default ADMIN account '{}' in organization '{}'", username, defaultOrganization.getSlug());
+    }
+}