move all viewer scripts to javascript

res/include/script/file_viewer/viewer_scripts/FileViewer.js

@@ -0,0 +1,35 @@
+class FileViewer {
+	viewer = null;
+	file   = null;
+
+	container = null;
+	icon      = null;
+
+	constructor(viewer, file, next) {let v = this;
+		v.viewer = viewer;
+		v.file   = file;
+		v.next   = next;
+
+		v.container = document.createElement("div");
+		v.container.classList = "image-container";
+		v.container.appendChild(document.createElement("br"));
+
+		v.icon = document.createElement("img");
+		v.icon.src = apiEndpoint+"/"+file.thumbnail_href;
+		v.container.appendChild(v.icon);
+
+		v.container.appendChild(document.createElement("br"));
+		v.container.appendChild(document.createTextNode(file.name));
+		v.container.appendChild(document.createElement("br"));
+		v.container.appendChild(document.createTextNode("Type: "+file.mime_type));
+		v.container.appendChild(document.createElement("br"));
+		v.container.appendChild(document.createElement("br"));
+		v.container.appendChild(document.createTextNode(
+			"Press the 'Download' button in the menu to download this file"
+		));
+	}
+
+	render(parent) {let v = this;
+		parent.appendChild(v.container);
+	}
+}