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import type { Data } from "../file.ts";
/** * Get the value of a page data * For example, if the value is "=title", it returns the value of the page data "title" * If the value is "$.title", it will return the value of the element with the selector ".title" */export function getDataValue(data: Partial<Data>, value?: unknown) {  // Get the value from the page data  if (typeof value === "string") {    if (value.startsWith("=")) {      const key = value.slice(1);
      if (!key.includes(".")) {        return data[key];      }
      const keys = key.split(".");      let val = data;      for (const key of keys) {        val = val?.[key];      }      return val;    }
    if (value.startsWith("$")) {      return queryCss(value, data.page?.document);    }  }
  if (typeof value === "function") {    return value(data);  }
  return value;}
function queryCss(value: string, document?: Document) {  // https://regexr.com/7qnot  const checkForAttrPattern = /^\$(.+)\s+(?:attr\(([\w\-]+)\))$/;  const checkResult = value.match(checkForAttrPattern);
  const hasAttr = checkResult?.[0];  if (hasAttr) {    const [_, query, name] = checkResult;    return document?.querySelector(query)?.getAttribute(name);  }
  const query = value.slice(1);  return document?.querySelector(query)?.innerHTML;}