refactor: split pipeline_state.rs into 4 sub-modules with co-located tests

The 1411-line pipeline_state.rs is split into: - mod.rs: types, transition(), execution_transition(), labels + transition tests (885 lines) - events.rs: TransitionFired, EventBus, TransitionSubscriber + event-bus tests (114 lines) - projection.rs: ProjectionError, TryFrom<&PipelineItemView>, read_typed + projection tests (379 lines) - subscribers.rs: 5 concrete TransitionSubscriber stubs (95 lines) Tests stay co-located. No behaviour change. All 42 pipeline_state tests pass; full suite green.
2026-04-26 21:30:55 +00:00
parent f1e42710b5
commit 5aedf94512
4 changed files with 606 additions and 536 deletions
@@ -0,0 +1,94 @@
+//! Concrete subscriber stubs for the event bus.
+
+use super::Stage;
+use super::events::{TransitionFired, TransitionSubscriber};
+use super::{event_label, stage_dir_name, stage_label};
+
+
+// ── Subscriber stubs (real dispatch uses these as the interface) ─────────────
+//
+// These are ready to wire into the event bus but not yet connected to the
+// actual subsystems. Suppress dead_code until consumers are migrated.
+
+#[allow(dead_code)]
+pub struct MatrixBotSubscriber;
+#[allow(dead_code)]
+impl TransitionSubscriber for MatrixBotSubscriber {
+    fn name(&self) -> &'static str {
+        "matrix-bot"
+    }
+    fn on_transition(&self, f: &TransitionFired) {
+        crate::slog!(
+            "[pipeline/matrix-bot] #{}: {} → {}",
+            f.story_id,
+            stage_label(&f.before),
+            stage_label(&f.after)
+        );
+    }
+}
+
+#[allow(dead_code)]
+pub struct FileRendererSubscriber;
+#[allow(dead_code)]
+impl TransitionSubscriber for FileRendererSubscriber {
+    fn name(&self) -> &'static str {
+        "filesystem"
+    }
+    fn on_transition(&self, f: &TransitionFired) {
+        crate::slog!(
+            "[pipeline/filesystem] re-rendering work/{}/{}",
+            stage_dir_name(&f.after),
+            f.story_id
+        );
+    }
+}
+
+#[allow(dead_code)]
+pub struct PipelineItemsSubscriber;
+#[allow(dead_code)]
+impl TransitionSubscriber for PipelineItemsSubscriber {
+    fn name(&self) -> &'static str {
+        "pipeline-items"
+    }
+    fn on_transition(&self, f: &TransitionFired) {
+        crate::slog!(
+            "[pipeline/items] UPDATE stage = '{}' WHERE id = '{}'",
+            stage_dir_name(&f.after),
+            f.story_id
+        );
+    }
+}
+
+#[allow(dead_code)]
+pub struct AutoAssignSubscriber;
+#[allow(dead_code)]
+impl TransitionSubscriber for AutoAssignSubscriber {
+    fn name(&self) -> &'static str {
+        "auto-assign"
+    }
+    fn on_transition(&self, f: &TransitionFired) {
+        if matches!(f.after, Stage::Done { .. } | Stage::Archived { .. }) {
+            crate::slog!(
+                "[pipeline/auto-assign] story {} reached {}; checking for promotable backlog items",
+                f.story_id,
+                stage_label(&f.after)
+            );
+        }
+    }
+}
+
+#[allow(dead_code)]
+pub struct WebUiBroadcastSubscriber;
+#[allow(dead_code)]
+impl TransitionSubscriber for WebUiBroadcastSubscriber {
+    fn name(&self) -> &'static str {
+        "web-ui-broadcast"
+    }
+    fn on_transition(&self, f: &TransitionFired) {
+        crate::slog!(
+            "[pipeline/web-ui] broadcasting #{} transition to connected clients",
+            f.story_id
+        );
+    }
+}
+