Add support to declare multiple css/js per module with loading condition:

A css/js can be declared to only load if the module in question is the
page module being rendered, or to always be loaded even if the module
is just a dependency. The second case is useful for plugin type
modules. See one of the config.json files updated in this commit on
how to specify css/js to load. true = always load, false = only if page
module.

2 files changed, 45 insertions, 8 deletions

diff --git a/inc/module.inc.php b/inc/module.inc.php
index 597cfb57..52646983 100644
--- a/inc/module.inc.php
+++ b/inc/module.inc.php
@@ -142,13 +142,23 @@ class Module
 	private $activated = false;
 	private $dependencies = array();
 	private $name;
+	/**
+	 * @var array assoc list of 'filename.css' => true|false (true = always load, false = only if module is main module)
+	 */
+	private $css = array();
+	/**
+	 * @var array assoc list of 'filename.js' => true|false (true = always load, false = only if module is main module)
+	 */
+	private $scripts = array();
 
 	private function __construct($name)
 	{
 		$file = 'modules/' . $name . '/config.json';
 		$json = @json_decode(@file_get_contents($file), true);
-		if (isset($json['dependencies']) && is_array($json['dependencies'])) {
-			$this->dependencies = $json['dependencies'];
+		foreach (['dependencies', 'css', 'scripts'] as $key) {
+			if (isset($json[$key]) && is_array($json[$key])) {
+				$this->$key = $json[$key];
+			}
 		}
 		if (isset($json['category']) && is_string($json['category'])) {
 			$this->category = $json['category'];
@@ -251,4 +261,29 @@ class Module
 		return 'modules/' . $this->name;
 	}
 
+	public function getScripts($externalOnly)
+	{
+		error_log($this->getIdentifier() . ' = ' . ($externalOnly ? 'true' : 'false'));
+		if (!$externalOnly) {
+			if (!isset($this->scripts['clientscript.js']) && file_exists($this->getDir() . '/clientscript.js')) {
+				$this->scripts['clientscript.js'] = false;
+			}
+			return array_keys($this->scripts);
+		}
+		error_log('Pre: ' . implode(', ', array_keys($this->scripts)));
+		error_log('Post: ' . implode(', ', array_keys(array_filter($this->scripts))));
+		return array_keys(array_filter($this->scripts));
+	}
+
+	public function getCss($externalOnly)
+	{
+		if (!$externalOnly) {
+			if (!isset($this->css['style.css']) && file_exists($this->getDir() . '/style.css')) {
+				$this->css['style.css'] = false;
+			}
+			return array_keys($this->css);
+		}
+		return array_keys(array_filter($this->css));
+	}
+
 }
diff --git a/inc/render.inc.php b/inc/render.inc.php
index 72993ab5..53e2f314 100644
--- a/inc/render.inc.php
+++ b/inc/render.inc.php
@@ -51,7 +51,9 @@ class Render
 	public static function output()
 	{
 		Header('Content-Type: text/html; charset=utf-8');
+		/* @var $modules Module[] */
 		$modules = array_reverse(Module::getActivated());
+		$pageModule = Page::getModule();
 		$title = Property::get('page-title-prefix', '');
 		$bgcolor = Property::get('logo-background', '');
 		if (!empty($bgcolor) || !empty($title)) {
@@ -79,9 +81,9 @@ class Render
 	';
 		// Include any module specific styles
 		foreach ($modules as $module) {
-			$file = $module->getDir() . '/style.css';
-			if (file_exists($file)) {
-				echo '<link href="', $file, '" rel="stylesheet" media="screen">';
+			$files = $module->getCss($module != $pageModule);
+			foreach ($files as $file) {
+				echo '<link href="', $module->getDir(), '/', $file, '" rel="stylesheet" media="screen">';
 			}
 		}
 		echo '	
@@ -109,9 +111,9 @@ class Render
 		<script src="script/collapse.js"></script>
 	';
 		foreach ($modules as $module) {
-			$file = $module->getDir() . '/clientscript.js';
-			if (file_exists($file)) {
-				echo '<script src="', $file, '"></script>';
+			$files = $module->getScripts($module != $pageModule);
+			foreach ($files as $file) {
+				echo '<script src="', $module->getDir(), '/', $file, '"></script>';
 			}
 		}
 		echo