From 55e1a475c00bd54bca6faab3e03f6c9646d1164a Mon Sep 17 00:00:00 2001
From: Dan Little <danlittle@yahoo.com>
Date: Mon, 21 Dec 2015 17:48:17 -0600
Subject: [PATCH] Added legend support for PDF printing, refs:
 geomoose/geomoose#99

---
 php/print.php      | 52 +++++++++++++++++++++++++++++++++++++++++++++-
 php/print_util.php | 21 +++++++++++++++++++
 2 files changed, 72 insertions(+), 1 deletion(-)

diff --git a/php/print.php b/php/print.php
index 10d4ff7..407540f 100644
--- a/php/print.php
+++ b/php/print.php
@@ -1,5 +1,5 @@
 <?php
-/*Copyright (c) 2009, Dan "Ducky" Little & GeoMOOSE.org
+/*Copyright (c) 2009-2015, Dan "Ducky" Little & GeoMOOSE.org
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -55,6 +55,13 @@
 	$units = 'm';
 }
 
+$renderLegends = $_REQUEST['legends'];
+if(isset($renderLegends)) {
+	$renderLegends = parseBoolean($renderLegends);
+} else { 
+	$renderLegends = true;
+}
+
 $template_path = '../../conf/print/';
 $template = $_REQUEST['template'];
 # some sanitization...
@@ -255,6 +262,49 @@
 	}
 
 
+	if($renderLegends) {
+		# put the legends on a second page.
+		$pdf->addPage('P', $templateSize);
+		$pdf->SetFont('Helvetica', '', 36.0);
+		$pdf->SetXY(72.0, 72.0);
+		# TODO: Bad for internationalization.
+		$pdf->Cell(0, .25, "Legends");
+		$legend_images = getLegendImages($mapbook, $print_info);
+
+		$pdf_legend_i = 0;
+		$legend_x = 36;
+		$legend_y = 100;
+		$legend_w = 0;
+		foreach($legend_images as $legend_image) {
+			$legend_filename = $tempDir.$uniqueId.'_pdf_legend'.$pdf_legend_i.'.jpg';
+			# write the file out as a jpeg
+			imagejpeg($legend_image, $legend_filename);
+			# get the size of the legend for placement.
+			$legend_size = getimagesize($legend_filename);
+			# check that the legend image is valid.
+			if($legend_size[0] > 0 and $legend_size[1] > 0) {
+				# place the new legend
+				$pdf->Image($legend_filename, $legend_x, $legend_y, $legend_size[0], $legend_size[1]);
+			
+				# move the legend down the page.
+				$legend_y += $legend_size[1];
+
+				# track the widest legend image.
+				$legend_w = max($legend_size[0], $legend_w);
+
+				# when the legend's height rolls over, go back to the top,
+				#  and shift over to the right.
+				if($legend_y > 7*72 ) {
+					$legend_y = 100;
+					$legend_x += $legend_w + 10;
+					# the width is only needed on a column-by-column basis.
+					$legend_w = 0;
+				}
+			}
+			$pdf_legend_i += 1;
+		} # end legends loop
+	} # end render legends 
+
 	$pdf->Output($tempDir.$uniqueId.'.pdf');
 
 	printf('<a target="_blank" href="php/download.php?id=%s&ext=pdf">Download PDF</a><br/>', $uniqueId);
diff --git a/php/print_util.php b/php/print_util.php
index b056064..2ca40cd 100644
--- a/php/print_util.php
+++ b/php/print_util.php
@@ -195,6 +195,27 @@ function getAgsImage($layer, $mapW, $mapH, $extent, $debug=false) {
 	return getImage(normalizeURL($url), $debug);
 }
 
+function getLegendImages($mapbook, $layers_json, $debug=false) {
+	global $CONFIGURATION;
+
+	$mapserverUrl = $CONFIGURATION['mapserver_url'];
+
+
+	$legend_images = [];
+	for($i = 0; $i < sizeof($layers_json); $i++) {
+		$legends = $layers_json[$i]['legends'];
+		if(isset($legends)) {
+			foreach($legends as $url) {
+				$normal_url = normalizeURL($url);
+				$legend_images[] = getImage($normal_url, $debug);
+				error_log($normal_url);
+			}
+		}
+	}
+	return $legend_images;
+
+}
+
 function renderImage($mapbook, $layers_json,  $mapImageWidth, $mapImageHeight, $extent, $debug=false) {
 	global $CONFIGURATION;