[7.x] Add Callbacks with Output to Console Schedule

[DougSisk]

Our health check provider allows POSTing output logs. Currently there's no built in way to do this. Instead of trying to figure out a one-size-fits-all to POST, my proposal is to use callbacks. This way you can use any kind of HTTP library you want, attach additional data, filter the output, etc.

I took the $onlyIfOutputExists argument from the emailOutputTo() command, so you can optionally only run the callback if an output was generated.

There are 4 callable methods, similar to the ping URL methods:

• thenWithOutput()
• thenIfWithOutput()
• onSuccessWithOutput()
• onFailureWithOutput()

Example:

$schedule->command('inspire')
    ->onSuccessWithOutput(function ($text) {
        Http::send('POST', 'https://healthcheckservice.test/abc123', [
            'body' => $text,
        ]);
    })
    ->daily();

[taylorotwell]

I made a few tweaks to this. The "output" is injected into the Closure using the container->call() method like the other callbacks. This means you must name the variable $output.

Which leads me to my next point, I think these methods shouldn't really be called directly and in 8.x I'm going to make the standard then callbacks reflect into the Closure and inject a Stringable $output if the Closure is requesting it.

[taylorotwell]

OK, got it fixed up on 8.x (master branch)... works with after, then, onSuccess, onFailure: