SQL Operations Studio Public Preview 1 (0.23) release source code

extensions-modules/src/models/logger.ts

@@ -0,0 +1,68 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+import * as os from 'os';
+import {ILogger} from './interfaces';
+import * as Utils from './utils';
+import {IExtensionConstants} from './contracts/contracts';
+/*
+* Logger class handles logging messages using the Util functions.
+*/
+export class Logger implements ILogger {
+    private _writer: (message: string) => void;
+    private _prefix: string;
+    private _extensionConstants: IExtensionConstants;
+
+    private _indentLevel: number = 0;
+    private _indentSize: number = 4;
+    private _atLineStart: boolean = false;
+
+    constructor(writer: (message: string) => void, extensionConstants: IExtensionConstants, prefix?: string) {
+        this._writer = writer;
+        this._prefix = prefix;
+        this._extensionConstants = extensionConstants;
+    }
+
+    public logDebug(message: string): void {
+        Utils.logDebug(message, this._extensionConstants.extensionConfigSectionName);
+    }
+
+    private _appendCore(message: string): void {
+        if (this._atLineStart) {
+            if (this._indentLevel > 0) {
+                const indent = ' '.repeat(this._indentLevel * this._indentSize);
+                this._writer(indent);
+            }
+
+            if (this._prefix) {
+                this._writer(`[${this._prefix}] `);
+            }
+
+            this._atLineStart = false;
+        }
+
+        this._writer(message);
+    }
+
+    public increaseIndent(): void {
+        this._indentLevel += 1;
+    }
+
+    public decreaseIndent(): void {
+        if (this._indentLevel > 0) {
+            this._indentLevel -= 1;
+        }
+    }
+
+    public append(message?: string): void {
+        message = message || '';
+        this._appendCore(message);
+    }
+
+    public appendLine(message?: string): void {
+        message = message || '';
+        this._appendCore(message + os.EOL);
+        this._atLineStart = true;
+    }
+}