Simplify code for telemetry decorator

Signed-off-by: Iku-turso <mikko.aspiala@gmail.com>

Co-authored-by: Gabriel <gaccettola@mirantis.com>

packages/core/src/features/telemetry/renderer/telemetry-decorator.injectable.ts

@@ -12,11 +12,18 @@ import {
 
 import assert from "assert";
 import { isFunction } from "lodash/fp";
-import emitTelemetryInjectable from "./emit-telemetry.injectable";
+import emitTelemetryInjectable, {
+  EmitTelemetry,
+} from "./emit-telemetry.injectable";
 
 import type { WhiteListItem } from "./telemetry-white-list-for-functions.injectable";
 import telemetryWhiteListForFunctionsInjectable from "./telemetry-white-list-for-functions.injectable";
-import logErrorInjectable from "../../../common/log-error.injectable";
+
+import logErrorInjectable, {
+  LogError,
+} from "../../../common/log-error.injectable";
+
+import type { AppEvent } from "../../../common/app-event-bus/event-bus";
 
 const telemetryDecoratorInjectable = getInjectable({
   id: "telemetry-decorator",
@@ -24,60 +31,39 @@ const telemetryDecoratorInjectable = getInjectable({
   instantiate: (diForDecorator) => ({
     decorate:
       (instantiateToBeDecorated: any) =>
-        (di: DiContainerForInjection, instantiationParameter: any) => {
-          const instance = instantiateToBeDecorated(di, instantiationParameter);
+      (di: DiContainerForInjection, instantiationParameter: any) => {
+        const instance = instantiateToBeDecorated(di, instantiationParameter);
 
-          if (!isFunction(instance)) {
-            return instance;
+        if (!isFunction(instance)) {
+          return instance;
+        }
+
+        return (...args: any[]) => {
+          const currentContext = di.context.at(-1);
+
+          assert(currentContext);
+
+          const emitTelemetry = diForDecorator.inject(emitTelemetryInjectable);
+          const logError = diForDecorator.inject(logErrorInjectable);
+          const doTelemetry = doTelemetryFor({ logError, emitTelemetry });
+
+          const whiteList = diForDecorator.inject(
+            telemetryWhiteListForFunctionsInjectable
+          );
+
+          const whiteListMap = getWhiteListMap(whiteList);
+
+          const whiteListed = whiteListMap.get(currentContext.injectable.id);
+
+          const result = instance(...args);
+
+          if (whiteListed) {
+            doTelemetry(whiteListed, args, currentContext);
           }
 
-          return (...args: any[]) => {
-            const currentContext = di.context.at(-1);
-
-            assert(currentContext);
-
-            const emitTelemetry = diForDecorator.inject(
-              emitTelemetryInjectable
-            );
-
-            const logError = diForDecorator.inject(logErrorInjectable);
-
-            const whiteList = diForDecorator.inject(
-              telemetryWhiteListForFunctionsInjectable
-            );
-
-            const whiteListMap = getWhiteListMap(whiteList);
-
-            const whiteListed = whiteListMap.get(currentContext.injectable.id);
-
-            if (!whiteListed) {
-              return instance(...args);
-            }
-
-            let params;
-
-            try {
-              params = whiteListed.getParams(...args);
-            } catch (e) {
-              params = {
-                error:
-                  "Tried to produce params for telemetry, but getParams() threw an error",
-              };
-
-              logError(
-                `Tried to produce params for telemetry of "${currentContext.injectable.id}", but getParams() threw an error`,
-                e
-              );
-            }
-
-            emitTelemetry({
-              action: currentContext.injectable.id,
-              params,
-            });
-
-            return instance(...args);
-          };
-        },
+          return result;
+        };
+      },
   }),
 
   decorable: false,
@@ -86,23 +72,60 @@ const telemetryDecoratorInjectable = getInjectable({
   injectionToken: instantiationDecoratorToken,
 });
 
+const doTelemetryFor =
+  ({
+    logError,
+    emitTelemetry,
+  }: {
+    logError: LogError;
+    emitTelemetry: EmitTelemetry;
+  }) =>
+  (
+    whiteListed: { getParams: (...args: unknown[]) => AppEvent["params"] },
+    args: any[],
+    currentContext: any
+  ) => {
+    try {
+      const params = whiteListed.getParams(...args);
+
+      emitTelemetry({
+        action: currentContext.injectable.id,
+        params,
+      });
+    } catch (e: any) {
+      logError(
+        `Tried to produce params for telemetry of "${currentContext.injectable.id}", but getParams() threw an error`,
+        e
+      );
+
+      emitTelemetry({
+        action: currentContext.injectable.id,
+
+        params: {
+          error:
+            "Tried to produce params for telemetry, but getParams() threw an error",
+        },
+      });
+    }
+  };
+
 const getWhiteListMap = (whiteList: WhiteListItem[]) =>
   new Map(
     whiteList.map((item) =>
       typeof item === "string"
         ? [
-          item,
-          {
-            getParams: () => undefined,
-          },
-        ]
+            item,
+            {
+              getParams: () => undefined,
+            },
+          ]
         : [
-          item.id,
-          {
-            getParams: item.getParams,
-          },
-        ],
-    ),
+            item.id,
+            {
+              getParams: item.getParams,
+            },
+          ]
+    )
   );
 
 export default telemetryDecoratorInjectable;