new feature: banners, small images with status of the cake, that can …

…be embedded
Foxhind · Sep 1, 2012 · e1841e6 · e1841e6
1 parent e4c06aa
commit e1841e6
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diff --git a/app/refresher.php b/app/refresher.php
@@ -0,0 +1,19 @@
+<?php
+
+	include('../lib/config.php');
+
+	// Parse given query
+	$matches = array();
+	if (!preg_match("/^((\d+)\-(\w+)(\-[\w\-]+)?)\.(\w+)$/", $_GET['q'], $matches)) {
+		throw new Exception("Cant parse query string. Please make sure that it matches encoded regexp");
+	}
+	list($full_name, $base_name, $pie_id, $type, $args, $ext) = $matches;
+
+	try {
+		include("../lib/drawers/$type.php");
+		draw($pie_id, $base_name, $ext, $args);
+	} catch (Exception $e) {
+		header("Content-type: text/plain;");
+		echo "Failed to generate picture: " . $e->getMessage();
+	}
+?>
diff --git a/configs/nginx.conf.devenv b/configs/nginx.conf.devenv
@@ -55,5 +55,15 @@ ${NGINX_CONF_MODS}
 			proxy_buffering off;
 			proxy_read_timeout 3600;
 		}
+
+		location /banner/ {
+			root ${SRC_ROOT}/static;
+			try_files $uri @refresher;
+		}
+
+		location @refresher {
+			rewrite ^/banner/(.*)$                 /app/refresher.php/?q=$1 last;
+			proxy_pass http://127.0.0.1:${HTTPD_PORT};
+		}
 	}
 }
diff --git a/lib/drawers/progress1.php b/lib/drawers/progress1.php
@@ -0,0 +1,111 @@
+<?php
+
+$svg_template = dirname(__FILE__).'/progress1.svg';
+$output_dir = dirname(__FILE__) . '/../../static/banner/';
+$bg_schemes = array(
+	'low' => array('621a1a', 'c43636'),
+	'middle' => array('774600', 'd17b00'),
+	'high' => array('00221a', '006e5a'));
+
+
+function draw($pie_id, $base_name, $ext, $args) {
+	if (!in_array($ext, array('png', 'svg')))
+		throw new Exception("Selected banner type does not support output extension '$ext'");
+
+	// Firstly draw svg. We need it either way
+	$svg_output = draw_svg($pie_id, $base_name, $args);
+
+	if ($ext == 'svg') {
+		header("Content-type: image/svg+xml;");
+		readfile($svg_output);
+		exit;
+	}
+
+	if ($ext == 'png') {
+		$png_output = convert_to_png($svg_output, $base_name);
+		header("Content-type: image/png;");
+		readfile($png_output);
+		exit;
+	}
+}
+
+function draw_svg($pie_id, $base_name, $args) {
+	global $output_dir;
+	global $svg_template;
+	global $bg_schemes;
+
+	$bar_start = 59.4;
+	$bar_end = 383.9;
+	$bar_len = $bar_end - $bar_start;
+
+	$svg_output = $output_dir . $base_name . '.svg';
+	if (file_exists($svg_output))
+		return $svg_output;
+
+	// Parse
+	$xdoc = new DomDocument;
+	$xdoc->Load($svg_template);
+	$xp = new DomXPath($xdoc);
+
+    // Get progress from DB
+    $result = pg_query("SELECT state FROM pieces WHERE pie = " . $pie_id);
+    $states = pg_fetch_all_columns($result, 0);
+    $progress = array(0,0,0,0,0,0,0,0,0,0);
+    $full_sum = 9 * count($states);
+    $current_sum = 0;
+    foreach ($states as $st) {
+        $progress[$st] ++;
+        $current_sum += $st;
+    }
+
+    // Calculate bars positions and widths
+    $offset = $bar_start;
+    $step = $bar_len / count($states);
+    for ($i = 0 ; $i <= 9; $i++ ) {
+		$elem = find_by_id($xp, 'bar_' . $i);
+		$elem->setAttribute('x', $offset);
+		$elem->setAttribute('width', $step * $progress[$i]);
+		$offset += $step * $progress[$i];
+    }
+
+	// Set percent
+    $percent = round($current_sum / $full_sum * 100);
+	find_by_id($xp, 'percent-fg')->nodeValue = $percent . '%';
+
+	// Set BG color gradient;
+	$current_bg_scheme = $bg_schemes['middle'];
+	if ($progress[9] / count($states) > 0.6) {
+		$current_bg_scheme = $bg_schemes['high'];
+	} else if ($progress[0] / count($states) > 0.6) {
+		$current_bg_scheme = $bg_schemes['low'];
+	}
+
+	find_by_id($xp, 'bg-grd-start')->setAttribute('style', 'stop-color:#' . $current_bg_scheme[0] . ';stop-opacity:1');
+	find_by_id($xp, 'bg-grd-stop')->setAttribute('style', 'stop-color:#' . $current_bg_scheme[1] . ';stop-opacity:1');
+
+	// Save it to file
+	if (($fd = fopen($svg_output, 'w')) === false)
+		throw new Exception("Cant open SVG file for saving");
+	fwrite($fd, $xdoc->saveXML());
+	fclose($fd);
+
+	return $svg_output;
+}
+
+function convert_to_png($svg_input, $base_name) {
+	global $output_dir;
+
+	$png_output = $output_dir . $base_name . '.png';
+	exec("convert $svg_input $png_output");
+
+	return $png_output;
+}
+
+function find_by_id($xp, $id) {
+	$item = $xp->query("//*[@id = '$id']")->item(0);
+	if (empty($item))
+		throw new Exception("Cant find element with ID = $id");
+	return $item;
+}
+
+?>