1 files changed, 105 insertions, 0 deletions
diff --git a/src/server/template/vdom.ts b/src/server/template/vdom.ts
new file mode 100644
index 0000000..899565b
--- /dev/null
+++ b/src/server/template/vdom.ts
@@ -0,0 +1,105 @@
+export type component<
+	T extends Attribute = Attribute,
+	U extends node[] = node[],
+	R extends node = node
+> = ((attr: T, ...content: U) => R)
+
+export interface Attribute {
+	[key: string]: unknown,
+}
+
+export interface element<T extends string = string> {
+	name: T,
+	attr: Attribute,
+	content: node[],
+}
+
+export function iselement<T extends string = string>(e: unknown): e is element<T> {
+	return typeof e === "object" && e !== null && "name" in e;
+}
+
+export interface typed_data<T extends string = string> {
+	content: string,
+	type: T
+}
+
+export function istyped<T extends string = string>(e: unknown): e is typed_data<T> {
+	return typeof e === "object" && e !== null && "type" in e;
+}
+
+export type node = element | typed_data | node[] | string
+
+export function c<
+	T extends Attribute = Attribute,
+	U extends node[] = node[],
+	R extends node = node
+>(name: component<T, U, R>, attr: T, ...content: U): R {
+	return name(attr, ...content)
+}
+
+export default function t<T extends string = string>(name: T, attr?: Attribute, ...content: node[]): element<T> {
+	return {
+		name,
+		attr: attr ?? ({} as Attribute),
+		content
+	}
+}
+
+export function frag<T extends node[] = node[]>(_attr: Attribute, ...content: T) {
+	return content
+}
+
+export function join({sep = ""}: Attribute & {sep?: string}, ...content: string[]) {
+	return content.join(sep)
+}
+
+export function prenderdata<T extends string = string>(type: T) {
+	return function (content: string): typed_data<T> {
+		return {
+			content,
+			type
+		}
+	}
+}
+
+export function render<T extends string = string>(type: T, rendFunc: (node: element, content: string) => string) {
+	const data = prenderdata(type)
+	return function rend(Node: node): typed_data<T> {
+		if (Array.isArray(Node)) {
+			return data(Node.map(element => rend(element).content ?? "").join(""))
+		}
+
+		if (typeof Node == "string") {
+			return data(Node)
+		}
+
+		if (iselement(Node)) {
+			return data(rendFunc(Node, rend(Node.content).content))
+		}
+
+		if (istyped<T>(Node)) {
+			if (Node.type == type) {
+				return Node
+			} else {
+				throw new Error(Node.type + "is not valid. The type must be:" + type)
+			}
+		}
+		throw new TypeError("" + Node)
+	}
+}
+
+export function getText(node: node): string {
+	if (Array.isArray(node)) {
+		return node.map(element => getText(element) ?? "").join("")
+	}
+
+	if (typeof node == "string") {
+		return node
+	}
+
+	if (iselement(node)) {
+		return getText(node.content)
+	}
+
+	throw new TypeError("" + node)
+}