log service implementation

src/services/log.service.ts

@@ -0,0 +1,59 @@
+import log from 'electron-log';
+import * as path from 'path';
+
+import { isDev } from '../scripts/utils';
+
+import { LogLevelType } from 'jslib/enums/logLevelType';
+
+import { LogService as LogServiceAbstraction } from 'jslib/abstractions/log.service';
+
+export class LogService implements LogServiceAbstraction {
+    constructor(private filter: (level: LogLevelType) => boolean = null, logDir: string = null) {
+        if (logDir != null) {
+            log.transports.file.file = path.join(logDir, 'app.log');
+        }
+    }
+
+    debug(message: string) {
+        if (!isDev()) {
+            return;
+        }
+
+        this.write(LogLevelType.Debug, message);
+    }
+
+    info(message: string) {
+        this.write(LogLevelType.Info, message);
+    }
+
+    warning(message: string) {
+        this.write(LogLevelType.Warning, message);
+    }
+
+    error(message: string) {
+        this.write(LogLevelType.Error, message);
+    }
+
+    write(level: LogLevelType, message: string) {
+        if (this.filter != null && this.filter(level)) {
+            return;
+        }
+
+        switch (level) {
+            case LogLevelType.Debug:
+                log.debug(message);
+                break;
+            case LogLevelType.Info:
+                log.info(message);
+                break;
+            case LogLevelType.Warning:
+                log.warn(message);
+                break;
+            case LogLevelType.Error:
+                log.error(message);
+                break;
+            default:
+                break;
+        }
+    }
+}