38 lines
1 KiB
JavaScript
38 lines
1 KiB
JavaScript
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import { TextNode } from "./node.mjs";
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import { isBool, isNil } from "./lang.mjs";
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export class StrRenderer {
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async render(node) {
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return encodeNode(node);
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}
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}
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function encodeAnyNode(node) {
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return node instanceof TextNode ? encodeTextNode(node) : encodeNode(node);
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}
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function encodeTextNode(node) {
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return node.text;
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}
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function encodeNode(node) {
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return encodeHtml(node.tagName, node.attrs, node.children?.map(encodeAnyNode));
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}
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function encodeHtml(tagName, attrs, children) {
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const open = `<${tagName} ${encodeAttrs(attrs)}>`;
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if (isNil(children))
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return open;
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return `${open}${children.join("")}</${tagName}>`;
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}
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function encodeAttrs(attrs) {
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if (!attrs)
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return "";
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return Object.entries(attrs)
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.map(([key, value]) => encodeAttr(key, value))
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.filter(Boolean)
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.join(" ");
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}
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function encodeAttr(key, value) {
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if (isNil(value))
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return null;
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if (isBool(value))
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return value ? key : null;
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return `${key}="${value}"`;
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}
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