Separate moderation case status from decisions

src/lib/server/moderation/schema.ts

@@ -235,3 +235,42 @@ export function migrateModerationCaseReferenceIndexes(handle: Database.Database)
             ON moderation_case_notifications(case_id);
     `);
 }
+
+/** Normalize lifecycle state while retaining every prior decision and child record. */
+export function migrateModerationCaseStates(handle: Database.Database): void {
+    if (handle.pragma('foreign_keys', { simple: true }))
+        throw new Error('The case status migration requires foreign keys to be disabled');
+    const objects = handle
+        .prepare(
+            `SELECT sql FROM sqlite_master
+        WHERE tbl_name='moderation_cases' AND type IN ('index','trigger') AND sql IS NOT NULL`
+        )
+        .all() as { sql: string }[];
+    // Capture old statuses even for imported cases without a corresponding decision event.
+    handle.exec(`INSERT INTO moderation_events(game,guid,actor,action,subject_id,detail,created_at)
+        SELECT game,guid,'Maxis','case.status_migrated',id,
+            json_object('from',status,'to',CASE WHEN status='escalated' THEN 'in_review' ELSE 'closed' END),
+            strftime('%Y-%m-%dT%H:%M:%fZ','now') FROM moderation_cases
+        WHERE status NOT IN ('open','in_review');
+        CREATE TABLE moderation_cases_state (
+            id TEXT PRIMARY KEY, game TEXT NOT NULL, guid TEXT NOT NULL, title TEXT NOT NULL,
+            status TEXT NOT NULL CHECK(status IN ('open','in_review','closed')),
+            actor_id TEXT NOT NULL, actor TEXT NOT NULL,
+            created_at TEXT NOT NULL, updated_at TEXT NOT NULL, revision INTEGER NOT NULL DEFAULT 1,
+            priority TEXT NOT NULL DEFAULT 'normal' CHECK(priority IN ('low','normal','high','urgent')),
+            assignee_id TEXT REFERENCES auth_users(id) ON DELETE SET NULL,
+            review_at TEXT, review_reason TEXT NOT NULL DEFAULT '',
+            review_sanction_id TEXT REFERENCES moderation_sanctions(id) ON DELETE SET NULL
+        );
+        INSERT INTO moderation_cases_state
+            SELECT id,game,guid,title,
+                CASE WHEN status IN ('open','in_review') THEN status
+                    WHEN status='escalated' THEN 'in_review' ELSE 'closed' END,
+                actor_id,actor,created_at,updated_at,
+                revision+CASE WHEN status IN ('open','in_review') THEN 0 ELSE 1 END,
+                priority,assignee_id,review_at,review_reason,review_sanction_id FROM moderation_cases;
+        DROP TABLE moderation_cases;
+        ALTER TABLE moderation_cases_state RENAME TO moderation_cases;
+    `);
+    for (const object of objects) handle.exec(object.sql);
+}