From 6fc3aa0b31021f02d10e5a2efb12879aa64774fd Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Fri, 5 Nov 2021 13:10:15 +0100
Subject: taler-wallet: implement log level, use new wallet for every benchmark
 iteration

---
 packages/taler-util/src/logging.ts      | 101 ++++++++++++++++++++++++++++++--
 packages/taler-wallet-cli/src/bench1.ts |  17 +++---
 packages/taler-wallet-cli/src/index.ts  |   8 +++
 3 files changed, 112 insertions(+), 14 deletions(-)

diff --git a/packages/taler-util/src/logging.ts b/packages/taler-util/src/logging.ts
index 0037d95a3..8b9de1ab0 100644
--- a/packages/taler-util/src/logging.ts
+++ b/packages/taler-util/src/logging.ts
@@ -23,6 +23,47 @@ const isNode =
   typeof process.release !== "undefined" &&
   process.release.name === "node";
 
+export enum LogLevel {
+  Trace = "trace",
+  Message = "message",
+  Info = "info",
+  Warn = "warn",
+  Error = "error",
+  None = "none",
+}
+
+export let globalLogLevel = LogLevel.Info;
+
+export function setGlobalLogLevelFromString(logLevelStr: string) {
+  let level: LogLevel;
+  switch (logLevelStr.toLowerCase()) {
+    case "trace":
+      level = LogLevel.Trace;
+      break;
+    case "info":
+      level = LogLevel.Info;
+      break;
+    case "warn":
+    case "warning":
+      level = LogLevel.Warn;
+      break;
+    case "error":
+      level = LogLevel.Error;
+      break;
+    case "none":
+      level = LogLevel.None;
+      break;
+    default:
+      if (isNode) {
+        process.stderr.write(`Invalid log level, defaulting to WARNING`);
+      } else {
+        console.warn(`Invalid log level, defaulting to WARNING`);
+      }
+      level = LogLevel.Warn;
+  }
+  globalLogLevel = level;
+}
+
 function writeNodeLog(
   message: any,
   tag: string,
@@ -57,21 +98,60 @@ export class Logger {
   constructor(private tag: string) {}
 
   shouldLogTrace() {
-    // FIXME: Implement logic to check loglevel
-    return true;
+    switch (globalLogLevel) {
+      case LogLevel.Trace:
+        return true;
+      case LogLevel.Message:
+      case LogLevel.Info:
+      case LogLevel.Warn:
+      case LogLevel.Error:
+      case LogLevel.None:
+        return false;
+    }
   }
 
   shouldLogInfo() {
-    // FIXME: Implement logic to check loglevel
-    return true;
+    switch (globalLogLevel) {
+      case LogLevel.Trace:
+      case LogLevel.Message:
+      case LogLevel.Info:
+        return true;
+      case LogLevel.Warn:
+      case LogLevel.Error:
+      case LogLevel.None:
+        return false;
+    }
   }
 
   shouldLogWarn() {
-    // FIXME: Implement logic to check loglevel
-    return true;
+    switch (globalLogLevel) {
+      case LogLevel.Trace:
+      case LogLevel.Message:
+      case LogLevel.Info:
+      case LogLevel.Warn:
+        return true;
+      case LogLevel.Error:
+      case LogLevel.None:
+        return false;
+    }
+  }
+
+  shouldLogError() {
+    switch (globalLogLevel) {
+      case LogLevel.Trace:
+      case LogLevel.Message:
+      case LogLevel.Info:
+      case LogLevel.Warn:
+      case LogLevel.Error:
+      case LogLevel.None:
+        return false;
+    }
   }
 
   info(message: string, ...args: any[]): void {
+    if (!this.shouldLogInfo()) {
+      return;
+    }
     if (isNode) {
       writeNodeLog(message, this.tag, "INFO", args);
     } else {
@@ -83,6 +163,9 @@ export class Logger {
   }
 
   warn(message: string, ...args: any[]): void {
+    if (!this.shouldLogWarn()) {
+      return;
+    }
     if (isNode) {
       writeNodeLog(message, this.tag, "WARN", args);
     } else {
@@ -94,6 +177,9 @@ export class Logger {
   }
 
   error(message: string, ...args: any[]): void {
+    if (!this.shouldLogError()) {
+      return;
+    }
     if (isNode) {
       writeNodeLog(message, this.tag, "ERROR", args);
     } else {
@@ -105,6 +191,9 @@ export class Logger {
   }
 
   trace(message: any, ...args: any[]): void {
+    if (!this.shouldLogTrace()) {
+      return;
+    }
     if (isNode) {
       writeNodeLog(message, this.tag, "TRACE", args);
     } else {
diff --git a/packages/taler-wallet-cli/src/bench1.ts b/packages/taler-wallet-cli/src/bench1.ts
index 4a2651f36..ec0430d8d 100644
--- a/packages/taler-wallet-cli/src/bench1.ts
+++ b/packages/taler-wallet-cli/src/bench1.ts
@@ -40,16 +40,17 @@ export async function runBench1(configJson: any): Promise<void> {
   const b1conf = codecForBench1Config().decode(configJson);
 
   const myHttpLib = new NodeHttpLib();
-  const wallet = await getDefaultNodeWallet({
-    // No persistent DB storage.
-    persistentStoragePath: undefined,
-    httpLib: myHttpLib,
-  });
-  await wallet.client.call(WalletApiOperation.InitWallet, {});
 
   const numIter = b1conf.iterations ?? 1;
 
   for (let i = 0; i < numIter; i++) {
+    const wallet = await getDefaultNodeWallet({
+      // No persistent DB storage.
+      persistentStoragePath: undefined,
+      httpLib: myHttpLib,
+    });
+    await wallet.client.call(WalletApiOperation.InitWallet, {});
+
     await wallet.client.call(WalletApiOperation.WithdrawFakebank, {
       amount: "TESTKUDOS:10",
       bank: b1conf.bank,
@@ -68,9 +69,9 @@ export async function runBench1(configJson: any): Promise<void> {
     await wallet.runTaskLoop({
       stopWhenDone: true,
     });
-  }
 
-  wallet.stop();
+    wallet.stop();
+  }
 }
 
 /**
diff --git a/packages/taler-wallet-cli/src/index.ts b/packages/taler-wallet-cli/src/index.ts
index 142e98e7c..71431b5eb 100644
--- a/packages/taler-wallet-cli/src/index.ts
+++ b/packages/taler-wallet-cli/src/index.ts
@@ -43,6 +43,8 @@ import {
   Configuration,
   decodeCrock,
   rsaBlind,
+  LogLevel,
+  setGlobalLogLevelFromString,
 } from "@gnu-taler/taler-util";
 import {
   NodeHttpLib,
@@ -161,6 +163,12 @@ export const walletCli = clk
       setDangerousTimetravel(x / 1000);
     },
   })
+  .maybeOption("log", ["-L", "--log"], clk.STRING, {
+    help: "configure log level (NONE, ..., TRACE)",
+    onPresentHandler: (x) => {
+      setGlobalLogLevelFromString(x);
+    },
+  })
   .maybeOption("inhibit", ["--inhibit"], clk.STRING, {
     help:
       "Inhibit running certain operations, useful for debugging and testing.",
-- 
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