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server-rs/crates/api-server/src/work_author.rs

@@ -0,0 +1,54 @@
+use module_auth::AuthUser;
+
+use crate::state::AppState;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct WorkAuthorSummary {
+    pub display_name: String,
+    pub public_user_code: Option<String>,
+}
+
+/// 中文注释：作品作者的真相源是 owner_user_id；历史昵称字段只作为账号资料不可读时的兼容回退。
+pub fn resolve_work_author_by_user_id(
+    state: &AppState,
+    owner_user_id: &str,
+    fallback_display_name: Option<&str>,
+    fallback_public_user_code: Option<&str>,
+) -> WorkAuthorSummary {
+    let fallback_display_name =
+        normalize_optional_text(fallback_display_name).unwrap_or_else(|| "玩家".to_string());
+    let fallback_public_user_code = normalize_optional_text(fallback_public_user_code);
+
+    let Some(owner_user_id) = normalize_optional_text(Some(owner_user_id)) else {
+        return WorkAuthorSummary {
+            display_name: fallback_display_name,
+            public_user_code: fallback_public_user_code,
+        };
+    };
+
+    match state.auth_user_service().get_user_by_id(&owner_user_id) {
+        Ok(Some(user)) => map_auth_user_to_work_author_summary(user, fallback_display_name),
+        Ok(None) | Err(_) => WorkAuthorSummary {
+            display_name: fallback_display_name,
+            public_user_code: fallback_public_user_code,
+        },
+    }
+}
+
+fn map_auth_user_to_work_author_summary(
+    user: AuthUser,
+    fallback_display_name: String,
+) -> WorkAuthorSummary {
+    WorkAuthorSummary {
+        display_name: normalize_optional_text(Some(user.display_name.as_str()))
+            .unwrap_or(fallback_display_name),
+        public_user_code: normalize_optional_text(Some(user.public_user_code.as_str())),
+    }
+}
+
+fn normalize_optional_text(value: Option<&str>) -> Option<String> {
+    value
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .map(ToOwned::to_owned)
+}