From 0c684980da34f8691d19efde8a652afb416f759c Mon Sep 17 00:00:00 2001
From: Christopher Vagnetoft <cvagnetoft@gmail.com>
Date: Tue, 31 Oct 2017 18:10:39 +0100
Subject: [PATCH] Added examples, tweaked print job

---
 examples/print.php  | 17 +++++++++++++++++
 examples/simple.php | 13 +++++++++++++
 src/PrintJob.php    |  6 ++++++
 3 files changed, 36 insertions(+)
 create mode 100644 examples/print.php
 create mode 100644 examples/simple.php

diff --git a/examples/print.php b/examples/print.php
new file mode 100644
index 0000000..6563a0a
--- /dev/null
+++ b/examples/print.php
@@ -0,0 +1,17 @@
+<?php
+
+require_once __DIR__."/../vendor/autoload.php";
+
+use NoccyLabs\Lpr\PrintJob;
+
+$job = new PrintJob("image.png");
+
+// Configure
+$job->setPrinter("QL-570");
+$job->setMedia("A4");
+
+// Additional options can be set like this
+$job->setOption("fit-to-page", true);
+
+// Invoke lpr to print the image
+$job->submit();
\ No newline at end of file
diff --git a/examples/simple.php b/examples/simple.php
new file mode 100644
index 0000000..9e0ae5c
--- /dev/null
+++ b/examples/simple.php
@@ -0,0 +1,13 @@
+<?php
+
+require_once __DIR__."/../vendor/autoload.php";
+
+use NoccyLabs\Lpr\PrintJob;
+
+$job = new PrintJob("image.png");
+
+// Configure
+$job->setPrinter("PDF");
+
+// Invoke lpr to print the image
+$job->submit();
diff --git a/src/PrintJob.php b/src/PrintJob.php
index 5c98437..695cfd1 100644
--- a/src/PrintJob.php
+++ b/src/PrintJob.php
@@ -94,6 +94,12 @@ class PrintJob
      */
     public function submit()
     {
+        if (!file_exists($this->document)) {
+            throw new LprException(
+                sprintf("The document could not be printed because the file could not be found: %s", $this->document)
+            );
+        }
+
         $options = [];
         if ($this->server !== null) {
             $options[] = "-H";