import { isBool, isNil, isStr } from "./lang.mjs"; import { Elem } from "./nodes.mjs"; export class StrRenderer { render(node) { return encodeNode(node); } } function encodeAnyNode(node) { return !node ? null : isStr(node) ? encodeTextNode(node) : encodeNode(node); } function encodeTextNode(node) { return String(node); } function encodeNode(node) { const encodedChildren = isNil(node.children) ? undefined : node.children.map(encodeAnyNode); return node instanceof Elem ? encodeHtmlElement(node.tagName, node.attrs, encodedChildren) : encodeHtmlFragment(encodedChildren); } function encodeHtmlFragment(children) { return concat(children ?? []); } function encodeHtmlElement(tagName, attrs, children) { const open = `<${join(" ", [tagName, encodeAttrs(attrs)])}>`; if (isNil(children)) return open; return `${open}${concat(children)}`; } function encodeAttrs(attrs) { if (!attrs) return null; return join(" ", Object.entries(attrs).map(([key, value]) => encodeAttr(key, value))); } function encodeAttr(key, value) { if (isNil(value)) return null; if (isBool(value)) return value ? key : null; return `${key}="${value}"`; } function concat(arr) { return join("", arr); } function join(sep, arr) { return arr.filter(Boolean).join(sep); }