perf(rstream-log): Level => const enum

- export `__Level` for reverse lookups
thi-ng · Sep 24, 2018 · fc6a4d3 · fc6a4d3
1 parent 8e4fc90
commit fc6a4d3
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Showing 2 changed files with 9 additions and 4 deletions.
diff --git a/packages/rstream-log/src/api.ts b/packages/rstream-log/src/api.ts
@@ -1,7 +1,7 @@
 import { IID } from "@thi.ng/api/api";
 import { ISubscribable } from "@thi.ng/rstream/api";
 
-export enum Level {
+export const enum Level {
     FINE,
     DEBUG,
     INFO,
@@ -10,6 +10,11 @@ export enum Level {
     NONE,
 }
 
+/**
+ * Reverse lookup for `Level` enums
+ */
+export const __Level = (<any>exports).Level;
+
 export interface LogEntry extends Array<any> {
     [0]: Level;
     [1]: string;

diff --git a/packages/rstream-log/src/xform/format.ts b/packages/rstream-log/src/xform/format.ts
@@ -2,9 +2,9 @@ import { Transducer } from "@thi.ng/transducers/api";
 import { map } from "@thi.ng/transducers/xform/map";
 
 import {
+    __Level,
     BodyFormat,
     DateFormat,
-    Level,
     LogEntry,
     LogEntryObj
 } from "../api";
@@ -14,7 +14,7 @@ export function formatString(dtFmt?: DateFormat, bodyFmt?: BodyFormat): Transduc
     bodyFmt = bodyFmt || ((x) => x.toString());
     return map(
         ([level, id, time, ...body]) =>
-            `[${Level[level]}] [${id}] ${dtFmt(time)} ${bodyFmt(body)}`
+            `[${__Level[level]}] [${id}] ${dtFmt(time)} ${bodyFmt(body)}`
     );
 }
 
@@ -29,7 +29,7 @@ export function formatJSON(dtfmt?: (dt: number) => string): Transducer<LogEntry,
     return map(
         ([level, id, time, ...body]) =>
             JSON.stringify({
-                level: Level[level],
+                level: __Level[level],
                 id,
                 time: dtfmt(time),
                 body