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server-rs/crates/module-visual-novel/src/errors.rs

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+use std::{error::Error, fmt};
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum VisualNovelDomainError {
+    MissingProfileId,
+    MissingRunId,
+    MissingOwnerUserId,
+    MissingClientEventId,
+    MissingActionText,
+    InvalidChoiceId,
+    FreeTextDisabled,
+    HistoryRegenerationDisabled,
+    HistoryEntryNotFound,
+    InvalidHistorySource,
+    InvalidRuntimeStep,
+    InvalidJson,
+    EmptyRuntimeSteps,
+}
+
+impl fmt::Display for VisualNovelDomainError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let message = match self {
+            Self::MissingProfileId => "visual novel profile_id 缺失",
+            Self::MissingRunId => "visual novel run_id 缺失",
+            Self::MissingOwnerUserId => "visual novel owner_user_id 缺失",
+            Self::MissingClientEventId => "visual novel client_event_id 缺失",
+            Self::MissingActionText => "visual novel 行动文本缺失",
+            Self::InvalidChoiceId => "visual novel choice_id 不合法",
+            Self::FreeTextDisabled => "visual novel 当前作品未开启自由行动",
+            Self::HistoryRegenerationDisabled => "visual novel 当前作品未开启历史重生成",
+            Self::HistoryEntryNotFound => "visual novel history entry 不存在",
+            Self::InvalidHistorySource => "visual novel 只能从助手历史节点重生成",
+            Self::InvalidRuntimeStep => "visual novel runtime step 不合法",
+            Self::InvalidJson => "visual novel JSON 解析失败",
+            Self::EmptyRuntimeSteps => "visual novel runtime step 不能为空",
+        };
+        write!(f, "{message}")
+    }
+}
+
+impl Error for VisualNovelDomainError {}