impl logging wrapper

Author: vytdev

src/bricklib/index.ts

@@ -15,6 +15,7 @@ export * as format      from './format.js';
 export * as forms       from './forms.js';
 export * as glyphs      from './glyphs.js';
 export * as locale      from './locale.js';
+export * as logger      from './logger.js';
 export * as rawtext     from './rawtext.js';
 export * as server      from './server.js';
 export * as thread      from './thread.js';

src/bricklib/logger.ts

@@ -0,0 +1,138 @@
+/**
+ * A simple logging wrapper.
+ */
+
+/**
+ * Format placeholder for the log message.
+ */
+export const MSG_PLACEHOLDER = '{msg}';
+
+/**
+ * Format placeholder for the log type.
+ */
+export const TYPE_PLACEHOLDER = '{type}';
+
+/**
+ * @class
+ * Logging wrapper class.
+ */
+export class Logger
+{
+  /**
+   * @constructor
+   * Makes a new logger instance.
+   * @param fmt The logger format.
+   */
+  constructor(fmt?: string)
+  {
+    this._format = fmt ?? MSG_PLACEHOLDER;
+  }
+
+  /**
+   * @private
+   */
+  private _format: string;
+
+  /**
+   * Whether to print verbose logs.
+   */
+  public verboseMode: boolean = false;
+
+  /**
+   * Whether to print debugging logs.
+   */
+  public debugMode: boolean = false;
+
+  /**
+   * Format a log string.
+   * @param fmt The format.
+   * @param msg The message.
+   * @param type The log type.
+   * @returns Formatted string.
+   */
+  public static formatLog(fmt: string, msg: string, type: string): string
+  {
+    return fmt
+      .replace(MSG_PLACEHOLDER, msg)
+      .replace(TYPE_PLACEHOLDER, type);
+  }
+
+  /**
+   * Make a log text, printed onto console.
+   * @param type The log type.
+   * @param msg The message strings.
+   * @returns A formatted string.
+   */
+  public makeLog(type: string, ...msg: string[]): string
+  {
+    return Logger.formatLog(this._format, msg.join(' '), type);
+  }
+
+  /**
+   * Print debug logs (if debugMode is set).
+   * @param msg
+   * @returns Itself.
+   */
+  public debug(...msg: string[]): this
+  {
+    if (this.debugMode)
+      console.debug(this.makeLog('debug', ...msg));
+    return this;
+  }
+
+  /**
+   * Print verbose logs (if verboseMode is set).
+   * @param msg
+   * @returns Itself.
+   */
+  public verbose(...msg: string[]): this
+  {
+    if (this.verboseMode)
+      console.log(this.makeLog('verbose', ...msg));
+    return this;
+  }
+
+  /**
+   * Print logs.
+   * @param msg
+   * @returns Itself.
+   */
+  public log(...msg: string[]): this
+  {
+    console.log(this.makeLog('log', ...msg));
+    return this;
+  }
+
+  /**
+   * Print info logs.
+   * @param msg
+   * @returns Itself.
+   */
+  public info(...msg: string[]): this
+  {
+    console.info(this.makeLog('info', ...msg));
+    return this;
+  }
+
+  /**
+   * Print warnings.
+   * @param msg
+   * @returns Itself.
+   */
+  public warn(...msg: string[]): this
+  {
+    console.warn(this.makeLog('warn', ...msg));
+    return this;
+  }
+
+  /**
+   * Print errors.
+   * @param msg
+   * @returns Itself.
+   */
+  public error(...msg: string[]): this
+  {
+    console.error(this.makeLog('error', ...msg));
+    return this;
+  }
+}