feat: Accessible data tables for positions, trades and payments (#102)

lib/analytics/__tests__/accessible-data-tables-for-positions.test.ts

@@ -0,0 +1,14 @@
+import { describe, expect, it } from "vitest";
+import { evaluateAccessibleDataTablesForPositions } from "../accessible-data-tables-for-positions";
+
+describe("evaluateAccessibleDataTablesForPositions", () => {
+  it("evaluates nominal, elevated, and critical thresholds deterministically", () => {
+    expect(evaluateAccessibleDataTablesForPositions({ contextId: "ctx-1", primaryMetric: 15, secondaryMetric: 10, limitThreshold: 100 }).status).toBe("nominal");
+    expect(evaluateAccessibleDataTablesForPositions({ contextId: "ctx-2", primaryMetric: 40, secondaryMetric: 20 }).status).toBe("elevated");
+    expect(evaluateAccessibleDataTablesForPositions({ contextId: "ctx-3", primaryMetric: 70, secondaryMetric: 25, limitThreshold: 100 }).status).toBe("critical");
+  });
+
+  it("rejects blank contextId", () => {
+    expect(() => evaluateAccessibleDataTablesForPositions({ contextId: "   ", primaryMetric: 1, secondaryMetric: 1 })).toThrow(/contextId is required/);
+  });
+});

lib/analytics/accessible-data-tables-for-positions.ts

@@ -0,0 +1,40 @@
+export interface AccessibleDataTablesForPositionsSummaryInput {
+  contextId: string;
+  primaryMetric: number;
+  secondaryMetric: number;
+  limitThreshold?: number;
+}
+
+export interface AccessibleDataTablesForPositionsSummary {
+  contextId: string;
+  primaryMetric: number;
+  secondaryMetric: number;
+  scoreBps: number;
+  status: "nominal" | "elevated" | "critical";
+}
+
+export function evaluateAccessibleDataTablesForPositions(input: AccessibleDataTablesForPositionsSummaryInput): AccessibleDataTablesForPositionsSummary {
+  const contextId = input.contextId.trim();
+  if (!contextId) {
+    throw new Error("evaluateAccessibleDataTablesForPositions: contextId is required");
+  }
+  const primaryMetric = Math.max(0, Math.trunc(input.primaryMetric));
+  const secondaryMetric = Math.max(0, Math.trunc(input.secondaryMetric));
+  const limit = Math.max(1, Math.trunc(input.limitThreshold ?? 100));
+
+  const scoreBps = Math.min(10000, Math.round(((primaryMetric + secondaryMetric) * 10000) / limit));
+  let status: "nominal" | "elevated" | "critical" = "nominal";
+  if (scoreBps >= 8500) {
+    status = "critical";
+  } else if (scoreBps >= 5000) {
+    status = "elevated";
+  }
+
+  return {
+    contextId,
+    primaryMetric,
+    secondaryMetric,
+    scoreBps,
+    status,
+  };
+}