60 lines
2.0 KiB
Rust
60 lines
2.0 KiB
Rust
//! 剧情领域事件。
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//!
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//! 事件只表达 story session 已经发生的领域事实；是否写入 SpacetimeDB event table 或
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//! 映射成 HTTP/SSE 输出，由外层 adapter 决定。
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use crate::domain::StorySessionSnapshot;
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use serde::{Deserialize, Serialize};
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use shared_kernel::build_prefixed_seed_id;
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#[cfg(feature = "spacetime-types")]
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use spacetimedb::SpacetimeType;
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/// 剧情事件 ID 的稳定前缀。
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pub const STORY_EVENT_ID_PREFIX: &str = "storyevt_";
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/// 剧情事件类型，当前覆盖开局和续写两条最小主链。
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#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
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pub enum StoryEventKind {
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SessionStarted,
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StoryContinued,
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}
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impl StoryEventKind {
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pub fn as_str(&self) -> &'static str {
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match self {
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Self::SessionStarted => "session_started",
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Self::StoryContinued => "story_continued",
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}
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}
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}
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#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
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#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
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pub struct StoryEventSnapshot {
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pub event_id: String,
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pub story_session_id: String,
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pub event_kind: StoryEventKind,
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pub narrative_text: String,
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pub choice_function_id: Option<String>,
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pub created_at_micros: i64,
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}
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pub fn build_story_started_event(snapshot: &StorySessionSnapshot) -> StoryEventSnapshot {
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StoryEventSnapshot {
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event_id: generate_story_event_id(snapshot.created_at_micros),
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story_session_id: snapshot.story_session_id.clone(),
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event_kind: StoryEventKind::SessionStarted,
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narrative_text: snapshot
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.opening_summary
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.clone()
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.unwrap_or_else(|| snapshot.initial_prompt.clone()),
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choice_function_id: None,
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created_at_micros: snapshot.created_at_micros,
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}
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}
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pub fn generate_story_event_id(seed_micros: i64) -> String {
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build_prefixed_seed_id(STORY_EVENT_ID_PREFIX, seed_micros)
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}
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