wallet-core: native logging support

1 files changed, 42 insertions, 1 deletions

diff --git a/packages/taler-util/src/logging.ts b/packages/taler-util/src/logging.ts
index 79fc49cdd..9e6a265b8 100644
--- a/packages/taler-util/src/logging.ts
+++ b/packages/taler-util/src/logging.ts
@@ -14,6 +14,7 @@
  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
  */
 
+
 /**
  * Check if we are running under nodejs.
  */
@@ -35,6 +36,8 @@ export enum LogLevel {
 let globalLogLevel = LogLevel.Info;
 const byTagLogLevel: Record<string, LogLevel> = {};
 
+let nativeLogging: boolean = false;
+
 export function getGlobalLogLevel(): string {
   return globalLogLevel;
 }
@@ -47,6 +50,10 @@ export function setLogLevelFromString(tag: string, logLevelStr: string): void {
   byTagLogLevel[tag] = getLevelForString(logLevelStr);
 }
 
+export function enableNativeLogging() {
+  nativeLogging = true;
+}
+
 function getLevelForString(logLevelStr: string): LogLevel {
   switch (logLevelStr.toLowerCase()) {
     case "trace":
@@ -70,6 +77,24 @@ function getLevelForString(logLevelStr: string): LogLevel {
   }
 }
 
+function writeNativeLog(
+  message: any,
+  tag: string,
+  level: number,
+  args: any[],
+): void {
+  const logFn = (globalThis as any).__nativeLog;
+  if (logFn) {
+    let m: string;
+    if (args.length == 0) {
+      m = message;
+    } else {
+      m = message + " " + args.toString();
+    }
+    logFn(level, tag, message);
+  }
+}
+
 function writeNodeLog(
   message: any,
   tag: string,
@@ -102,7 +127,7 @@ function writeNodeLog(
  * and uses the corresponding console.* method to log in the browser.
  */
 export class Logger {
-  constructor(private tag: string) { }
+  constructor(private tag: string) {}
 
   shouldLogTrace(): boolean {
     const level = byTagLogLevel[this.tag] ?? globalLogLevel;
@@ -164,6 +189,10 @@ export class Logger {
     if (!this.shouldLogInfo()) {
       return;
     }
+    if (nativeLogging) {
+      writeNativeLog(message, this.tag, 2, args);
+      return;
+    }
     if (isNode) {
       writeNodeLog(message, this.tag, "INFO", args);
     } else {
@@ -178,6 +207,10 @@ export class Logger {
     if (!this.shouldLogWarn()) {
       return;
     }
+    if (nativeLogging) {
+      writeNativeLog(message, this.tag, 3, args);
+      return;
+    }
     if (isNode) {
       writeNodeLog(message, this.tag, "WARN", args);
     } else {
@@ -192,6 +225,10 @@ export class Logger {
     if (!this.shouldLogError()) {
       return;
     }
+    if (nativeLogging) {
+      writeNativeLog(message, this.tag, 4, args);
+      return;
+    }
     if (isNode) {
       writeNodeLog(message, this.tag, "ERROR", args);
     } else {
@@ -206,6 +243,10 @@ export class Logger {
     if (!this.shouldLogTrace()) {
       return;
     }
+    if (nativeLogging) {
+      writeNativeLog(message, this.tag, 1, args);
+      return;
+    }
     if (isNode) {
       writeNodeLog(message, this.tag, "TRACE", args);
     } else {