Implementation of the customer consumption display

src/background.js

@@ -20,6 +20,13 @@
   const CUSTOMER_TOKEN_SERVICE_URL = "https://spa.oracle.com/oalcrm/web/api/g2m-consumer-application/consumerTokenService";
   const ACCOUNT_SUMMARY_URL = "https://spa.oracle.com/oalcrm/web/api/provider-proxy/g2m-account/service/accountsummary";
   const ACCOUNT_PLANS_URL = "https://spa.oracle.com/oalcrm/web/api/provider-proxy/g2m-consumption/service/v1/account/accountPlans";
+  const CONSUMPTION_TREND_URL = "https://spa.oracle.com/oalcrm/web/api/provider-proxy/g2m-consumption/service/v1/plan/trend";
+  const CONSUMPTION_TREND_REQUESTS = {
+    quarterly: "requestConsumptionServiceQuarterly",
+    monthly: "requestConsumptionServiceMonthly",
+    weekly: "requestConsumptionServiceWeekly",
+    daily: "requestConsumptionServiceDaily"
+  };
   const ACCOUNT_PLANS_PAYLOAD = {
     hierarchy: "single",
     products: "all",
@@ -149,6 +156,20 @@
       return true;
     }
 
+    if (message.type === "opportunitiesExtension.requestConsumptionTrend") {
+      requestConsumptionTrend(message)
+        .then(sendResponse)
+        .catch((error) => {
+          sendResponse({
+            ok: false,
+            error: error.message || "Unable to load consumption trend.",
+            debugRequests: Array.isArray(error.debugRequests) ? error.debugRequests : []
+          });
+        });
+
+      return true;
+    }
+
     return false;
   });
 
@@ -282,6 +303,56 @@
     }
   }
 
+  async function requestConsumptionTrend(message) {
+    const subPlanNum = typeof message.subPlanNum === "string" ? message.subPlanNum.trim() : "";
+    const period = typeof message.period === "string" ? message.period.toLowerCase() : "";
+    const requestName = CONSUMPTION_TREND_REQUESTS[period];
+    const authorization = normalizeMessageAuthorization(message.authorization, "g2m-authorization");
+    const debugRequests = [];
+
+    if (!subPlanNum) {
+      throw new Error("Sub plan number is required for the consumption trend.");
+    }
+
+    if (!requestName) {
+      throw new Error(`Unsupported consumption trend period: ${period || "(missing)"}.`);
+    }
+
+    if (!authorization.value) {
+      throw new Error("OCICONS-TS authorization is unavailable for the consumption trend.");
+    }
+
+    const url = `${CONSUMPTION_TREND_URL}/${encodeURIComponent(subPlanNum)}?quarter=All&timePeriod=${period}`;
+
+    try {
+      const response = await fetchJson(url, {
+        method: "GET",
+        credentials: "include",
+        cache: "no-store",
+        headers: {
+          Accept: "application/json",
+          "G2m-Authorization": authorization.value
+        }
+      }, requestName, debugRequests);
+      const items = Array.isArray(response)
+        ? response
+        : Array.isArray(response && response.items)
+          ? response.items
+          : [];
+
+      return {
+        ok: true,
+        subPlanNum,
+        period,
+        items,
+        debugRequests
+      };
+    } catch (error) {
+      error.debugRequests = debugRequests;
+      throw error;
+    }
+  }
+
   function normalizeMessageAuthorization(authorization, fallbackHeaderName) {
     const headerName = authorization && typeof authorization.name === "string"
       ? authorization.name.trim()