Logging in ActionScript

Here’s the translation of the Go logging example to ActionScript, formatted in Markdown suitable for Hugo:

ActionScript does not have built-in logging capabilities as robust as Go’s log and slog packages. However, we can create a simple logging system using the trace() function and custom classes. Here’s an example of how we might implement logging in ActionScript:

package {
    import flash.display.Sprite;
    import flash.utils.getTimer;
    import flash.system.Capabilities;

    public class LoggingExample extends Sprite {
        public function LoggingExample() {
            // Simple logging using trace()
            trace("standard logger");

            // Custom logger with timestamps
            var logger:Logger = new Logger();
            logger.log("with timestamp");

            // Custom logger with file/line information
            logger.setIncludeFileInfo(true);
            logger.log("with file/line");

            // Custom logger with prefix
            var myLogger:Logger = new Logger("my:");
            myLogger.log("from myLogger");

            // Change prefix
            myLogger.setPrefix("ohmy:");
            myLogger.log("from myLogger");

            // Logging to a custom output (StringBuffer in this case)
            var bufLogger:BufferLogger = new BufferLogger("buf:");
            bufLogger.log("hello");
            trace("from bufLogger:", bufLogger.getBuffer());

            // JSON-like structured logging
            var structLogger:StructuredLogger = new StructuredLogger();
            structLogger.info("hi there");
            structLogger.info("hello again", {key: "val", age: 25});
        }
    }
}

class Logger {
    private var prefix:String;
    private var includeFileInfo:Boolean;

    public function Logger(prefix:String = "") {
        this.prefix = prefix;
        this.includeFileInfo = false;
    }

    public function log(message:String):void {
        var output:String = getTimestamp() + " " + prefix + message;
        if (includeFileInfo) {
            output = getFileInfo() + " " + output;
        }
        trace(output);
    }

    public function setPrefix(newPrefix:String):void {
        prefix = newPrefix;
    }

    public function setIncludeFileInfo(include:Boolean):void {
        includeFileInfo = include;
    }

    private function getTimestamp():String {
        var date:Date = new Date();
        return date.toLocaleString();
    }

    private function getFileInfo():String {
        return "[" + Capabilities.version + "]";
    }
}

class BufferLogger extends Logger {
    private var buffer:String;

    public function BufferLogger(prefix:String = "") {
        super(prefix);
        buffer = "";
    }

    override public function log(message:String):void {
        buffer += getTimestamp() + " " + prefix + message + "\n";
    }

    public function getBuffer():String {
        return buffer;
    }
}

class StructuredLogger {
    public function info(message:String, data:Object = null):void {
        var output:Object = {
            time: new Date().toLocaleString(),
            level: "INFO",
            msg: message
        };
        
        if (data) {
            for (var key:String in data) {
                output[key] = data[key];
            }
        }
        
        trace(JSON.stringify(output));
    }
}

This ActionScript code demonstrates logging concepts similar to those in the original example:

We use trace() for basic logging.
We create a Logger class that adds timestamps and prefixes to log messages.
The Logger class can include file information (in this case, just the Flash Player version).
We demonstrate changing the prefix of a logger.
We create a BufferLogger that logs to a string buffer instead of directly to the console.
We create a StructuredLogger that outputs JSON-like structured log messages.

To run this code, you would typically compile it into a SWF file and run it in a Flash Player or AIR runtime environment. The output would appear in the Flash debugger console or trace log, depending on your development setup.

Note that ActionScript doesn’t have built-in JSON support, so you might need to use a third-party library for JSON stringification in a real application. Also, the file and line information is simulated here, as ActionScript doesn’t provide easy access to this information at runtime.

This example provides a basic framework for logging in ActionScript, which you can expand upon for more complex logging needs in your ActionScript applications.

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Logging in ActionScript