add assignment v2 UI

app/javascript/dashboard/api/assignmentMetrics.js

@@ -0,0 +1,52 @@
+/* global axios */
+import ApiClient from './ApiClient';
+
+export class AssignmentMetricsAPI extends ApiClient {
+  constructor() {
+    super('reports/assignment_metrics', { accountScoped: true });
+  }
+
+  // GET /api/v1/accounts/:accountId/reports/assignment_metrics
+  get(params = {}) {
+    return axios.get(this.url, { params });
+  }
+
+  // GET /api/v1/accounts/:accountId/agents/:userId/assignment_history
+  getAgentHistory(userId, params = {}) {
+    return axios.get(
+      `/api/v1/accounts/${this.accountId}/agents/${userId}/assignment_history`,
+      { params }
+    );
+  }
+
+  // Get all agents assignment history
+  getAllAgentsHistory(params = {}) {
+    return axios.get(this.url, {
+      params: { ...params, include_agent_history: true },
+    });
+  }
+
+  // Get policy performance metrics
+  getPolicyPerformance(params = {}) {
+    return axios.get(this.url, {
+      params: { ...params, include_policy_performance: true },
+    });
+  }
+
+  // Get agent utilization metrics
+  getAgentUtilization(params = {}) {
+    return axios.get(this.url, {
+      params: { ...params, include_utilization: true },
+    });
+  }
+
+  // Export report data
+  exportReport(type, params = {}) {
+    return axios.get(`${this.url}/export`, {
+      params: { type, ...params },
+      responseType: 'blob',
+    });
+  }
+}
+
+export default new AssignmentMetricsAPI();