Create basic framework

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

extension.json

@@ -6,5 +6,27 @@
 	"version": "0.0.1",
 	"license-name": "MIT",
 	"type": "media",
-	"manifest_version": 2
+	"manifest_version": 2,
+    "AutoloadClasses": {
+		"GlModelViewer": "includes/GlModelViewer.php"
+	},
+    "Hooks": {
+		"MimeMagicInit": "GlModelViewer::onMimeMagicInit",
+        "MimeMagicImproveFromExtension": "GlModelViewer::onMimeMagicImproveFromExtension",
+        "BeforePageDisplay": "GlModelViewer::onBeforePageDisplay"
+	},
+    "ResourceFileModulePaths": {
+      "localBasePath": "modules",
+      "remoteExtPath": "GlModelViewer/modules"
+    },
+    "ResourceModules": {
+        "ext.glmv": {
+            "styles": [
+                "glmv.css"
+            ],
+            "packageFiles": [
+                "glmv.js"
+            ]
+        }
+    }
 }

includes/GlModelViewer.php

@@ -0,0 +1,24 @@
+<?php
+
+class GlModelViewer extends ImageHandler {
+  public static function onMimeMagicInit(MimeAnalyzer $mime) {
+    $mime->addExtraTypes('application/gltf glb gltf');
+    $mime->addExtraInfo('application/gltf [DRAWING]');
+  }
+
+  public static function onMimeMagicImproveFromExtension( MimeAnalyzer $mimeAnalyzer, $ext, &$mime ) {
+	  if ( $mime !== 'application/gltf' && in_array( $ext, ['glb', 'gltf'] ) ) {
+		  $mime = 'application/gltf';
+	  }
+  }
+
+  function doTransform($image, $dstPath, $dstUrl, $params, $flags = 0) {
+  }
+
+  public static function onBeforePageDisplay(OutputPage $out) {
+    if (strpos($out->getHTML(), 'class="glmv-viewer') !== false) {
+      $out->addModules('ext.glmv');
+    }
+  }
+
+}

modules/glmv.css

@@ -0,0 +1,3 @@
+.glmv-viewer {
+    width: 100%;
+}

modules/glmv.js

@@ -0,0 +1 @@
+console.log('GLMV JS loaded!')