Link prior moderation actions to case decisions

src/lib/server/moderation/case-actions.ts

@@ -0,0 +1,92 @@
+import { db } from '../db/index.js';
+import { AuthError } from '../auth/index.js';
+import { textField } from './core.js';
+import type { ModerationCaseAction, ModerationGame } from '../../moderation.js';
+
+type Subject = { game: ModerationGame; guid: string };
+export type CaseActionReference = Pick<ModerationCaseAction, 'type' | 'id'>;
+
+export function caseActionReference(value: unknown): CaseActionReference {
+    if (!value || typeof value !== 'object') throw new AuthError('Choose a recorded action.');
+    const reference = value as Record<string, unknown>;
+    if (reference.type !== 'action' && reference.type !== 'restriction')
+        throw new AuthError('Choose a recorded warning, action, or restriction.');
+    return { type: reference.type, id: textField(reference.id, 'Action ID', 128) };
+}
+
+const restrictionColumns = `id,'restriction' AS type,kind,reason,actor,
+    created_at AS createdAt,expires_at AS expiresAt,
+    CASE WHEN revoked_at IS NOT NULL THEN 'revoked'
+        WHEN expires_at IS NOT NULL AND expires_at<=? THEN 'expired' ELSE 'active' END AS state`;
+const actionColumns = `id,'action' AS type,kind,reason,actor,
+    created_at AS createdAt,expires_at AS expiresAt,state`;
+
+/** Only actual records for this account can become case evidence. */
+export function recordedCaseAction(
+    subject: Subject,
+    reference: CaseActionReference,
+    now: string
+): ModerationCaseAction {
+    const handle = db();
+    const action =
+        reference.type === 'restriction'
+            ? handle
+                  .prepare(
+                      `SELECT ${restrictionColumns} FROM moderation_sanctions
+                      WHERE id=? AND guid=? AND (game=? OR scope='fleet')`
+                  )
+                  .get(now, reference.id, subject.guid, subject.game)
+            : handle
+                  .prepare(
+                      `SELECT ${actionColumns} FROM moderation_actions
+                      WHERE id=? AND guid=? AND game=?`
+                  )
+                  .get(reference.id, subject.guid, subject.game);
+    if (!action)
+        throw new AuthError('The recorded action is unavailable for this case’s player.', 404);
+    return action as ModerationCaseAction;
+}
+
+export function isCaseActionLinked(caseId: string, reference: CaseActionReference): boolean {
+    return Boolean(
+        db()
+            .prepare(
+                `SELECT 1 FROM moderation_case_action_links
+                WHERE case_id=? AND action_type=? AND action_id=?
+                UNION ALL SELECT 1 FROM moderation_sanctions
+                WHERE ?='restriction' AND id=? AND case_id=? LIMIT 1`
+            )
+            .get(caseId, reference.type, reference.id, reference.type, reference.id, caseId)
+    );
+}
+
+export function caseActionLists(caseId: string, subject: Subject, now: string) {
+    const handle = db();
+    const records = handle
+        .prepare(
+            `SELECT ${restrictionColumns},
+                (case_id=? OR EXISTS (SELECT 1 FROM moderation_case_action_links l
+                    WHERE l.case_id=? AND l.action_type='restriction' AND l.action_id=moderation_sanctions.id)) AS linked
+            FROM moderation_sanctions WHERE guid=? AND (game=? OR scope='fleet')
+            UNION ALL SELECT ${actionColumns},
+                EXISTS (SELECT 1 FROM moderation_case_action_links l
+                    WHERE l.case_id=? AND l.action_type='action' AND l.action_id=moderation_actions.id) AS linked
+            FROM moderation_actions WHERE guid=? AND game=?
+            ORDER BY createdAt DESC,id`
+        )
+        .all(
+            now,
+            caseId,
+            caseId,
+            subject.guid,
+            subject.game,
+            caseId,
+            subject.guid,
+            subject.game
+        ) as Array<ModerationCaseAction & { linked: number | null }>;
+    const linkedActions: ModerationCaseAction[] = [];
+    const availableActions: ModerationCaseAction[] = [];
+    for (const { linked, ...record } of records)
+        (linked ? linkedActions : availableActions).push(record);
+    return { linkedActions, availableActions };
+}