Initial import

packages/domain/src/quota.ts

@@ -0,0 +1,43 @@
+export type QuotaBucket = 100 | 80 | 60 | 40 | 20 | 0;
+
+export interface QuotaUsageInput {
+  used: number;
+  limit: number;
+}
+
+export function getApproximateQuotaBucket(input: QuotaUsageInput): QuotaBucket {
+  const { used, limit } = input;
+
+  if (limit <= 0) {
+    return 0;
+  }
+
+  const safeUsed = clamp(used, 0, limit);
+  const remainingRatio = ((limit - safeUsed) / limit) * 100;
+
+  if (remainingRatio >= 81) {
+    return 100;
+  }
+
+  if (remainingRatio >= 61) {
+    return 80;
+  }
+
+  if (remainingRatio >= 41) {
+    return 60;
+  }
+
+  if (remainingRatio >= 21) {
+    return 40;
+  }
+
+  if (remainingRatio > 0) {
+    return 20;
+  }
+
+  return 0;
+}
+
+function clamp(value: number, min: number, max: number): number {
+  return Math.min(max, Math.max(min, value));
+}