1 files changed, 158 insertions, 0 deletions
diff --git a/src/zenserver/frontend/html/util/component.js b/src/zenserver/frontend/html/util/component.js
new file mode 100644
index 000000000..39a9f2fe6
--- /dev/null
+++ b/src/zenserver/frontend/html/util/component.js
@@ -0,0 +1,158 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+"use strict";
+
+////////////////////////////////////////////////////////////////////////////////
+class ComponentBase
+{
+	constructor(element)
+	{
+		if (element instanceof ComponentBase)
+			element = element._element;
+
+		this._element = element;
+	}
+
+	inner()
+	{
+		return this._element;
+	}
+
+	parent()
+	{
+		return this.new_component(this._element.parentElement);
+	}
+
+	first_child()
+	{
+		return this.new_component(this._element.firstElementChild);
+	}
+
+	next_sibling()
+	{
+		return this.new_component(this._element.nextElementSibling);
+	}
+
+	destroy()
+	{
+		this._element.parentNode.removeChild(this._element);
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////
+class ComponentDom extends ComponentBase
+{
+	is(tag)
+	{
+		return this._element.tagName == tag.toUpperCase();
+	}
+
+	tag(tag="div")
+	{
+		var element = document.createElement(tag);
+		this._element.appendChild(element);
+		return this.new_component(element);
+	}
+
+	retag(new_tag)
+	{
+		if (this._element.tagName == new_tag.toUpperCase())
+			return this;
+
+		var element = document.createElement(new_tag);
+		element.innerHTML = this._element.innerHTML;
+		this._element.parentNode.replaceChild(element, this._element);
+		this._element = element;
+		return this;
+	}
+
+	text(value)
+	{
+		value = (value == undefined) ? "undefined" : value.toString();
+		this._element.innerHTML = (value != "") ? value : "";
+		return this;
+	}
+
+	id(value)
+	{
+		this._element.id = value;
+		return this;
+	}
+
+	classify(value)
+	{
+		this._element.classList.add(value);
+		return this;
+	}
+
+	style(key, value)
+	{
+		this._element.style[key] = value;
+		return this;
+	}
+
+	attr(key, value=undefined)
+	{
+		if (value === undefined)
+			return this._element.getAttribute(key);
+		else if (value === null)
+			this._element.removeAttribute(key);
+		else
+			this._element.setAttribute(key, value);
+		return this;
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////
+class ComponentInteract extends ComponentDom
+{
+	link(resource=undefined, query_params={})
+	{
+		if (resource != undefined)
+		{
+			var href = resource;
+			var sep = "?";
+			for (const key in query_params)
+			{
+				href += sep + key + "=" + query_params[key];
+				sep = "&";
+			}
+		}
+		else
+			href = "javascript:void(0);";
+
+		var text = this._element.innerHTML;
+		this._element.innerHTML = "";
+		this.tag("a").text(text).attr("href", href);
+		return this;
+	}
+
+	on(what, func, ...args)
+	{
+		const thunk = (src) => {
+			if (src.target != this._element)
+				return;
+
+			func(...args);
+			src.stopPropagation();
+		};
+
+		this._element.addEventListener(what, thunk);
+		return this;
+	}
+
+	on_click(func, ...args)
+	{
+		this.classify("zen_action");
+		return this.on("click", func, ...args);
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////
+export class Component extends ComponentInteract
+{
+	new_component(...args)
+	{
+		return new Component(...args);
+	}
+}