Add autoscaling outcomes to Metrics (Refs #140)

src/lib/server/reports/revisions.ts

@@ -1,5 +1,26 @@
 import type Database from 'better-sqlite3';
 
+/** Provisioning outcomes remain report inputs even after the policy is removed. */
+export function installMetricsProvisioningRevisions(handle: Database.Database) {
+    for (const table of ['server_deployments', 'provisioning_sources'])
+        for (const action of ['INSERT', 'UPDATE', 'DELETE']) {
+            const versions =
+                action === 'INSERT' ? ['NEW'] : action === 'DELETE' ? ['OLD'] : ['OLD', 'NEW'];
+            const fields = ['server', 'action', 'state', 'started_at', 'finished_at'];
+            const condition =
+                table === 'provisioning_sources'
+                    ? versions.map((row) => `${row}.kind='autoscaling'`).join(' OR ')
+                    : `EXISTS (SELECT 1 FROM provisioning_sources WHERE operation_id=${action === 'DELETE' ? 'OLD' : 'NEW'}.id AND kind='autoscaling')${
+                          action === 'UPDATE'
+                              ? ` AND (${fields.map((field) => `OLD.${field} IS NOT NEW.${field}`).join(' OR ')})`
+                              : ''
+                      }`;
+            handle.exec(`CREATE TRIGGER IF NOT EXISTS report_metrics_${table}_${action}
+                AFTER ${action} ON ${table} WHEN ${condition}
+                BEGIN UPDATE report_revisions SET revision=revision+1 WHERE topic='metrics'; END;`);
+        }
+}
+
 /** Match demand includes active and interrupted matches, independent of leaderboard eligibility. */
 export function installMetricsMatchRevisions(handle: Database.Database) {
     for (const table of ['leaderboard_matches', 'leaderboard_match_players'])