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const decoder = new TextDecoder("utf-8");
export class Jae {  /**   * A property to hold the base path to the template(s).   */  public views_path = "";
  //////////////////////////////////////////////////////////////////////////////  // FILE MARKER - CONSTRUCTOR /////////////////////////////////////////////////  //////////////////////////////////////////////////////////////////////////////
  /**   * Construct an object of this class.   *   * @param viewsPath - The base path to the template(s).   */
  constructor(viewsPath: string) {    this.views_path = viewsPath;  }
  //////////////////////////////////////////////////////////////////////////////  // FILE MARKER - METHODS - PUBLIC ////////////////////////////////////////////  //////////////////////////////////////////////////////////////////////////////
  /**   * Render a template file and replace all template variables with the   * specified data.   *   * @param template - The template to render.   * @param data - The data that should be rendered with the template.   *   * @remarks   * For example, the data could be...   *     ```json   *     {   *       name: "John"   *     }   *     ```   * and the template would render "John" in <% name %>.   * This data can be anything and everything. It contains the data that the   * template engine will use for template variable replacement.   * @returns The html to be rendered   */  public render(template: string, data: unknown): string {    let code = "with(obj) { var r=[];\n";    let cursor = 0;    let match;    let filepath = this.views_path;    if (this.views_path.endsWith("/") && template.startsWith("/")) {      filepath += template.slice(1);    } else if (!this.views_path.endsWith("/") && !template.startsWith("/")) {      filepath += `/${template}`;    } else {      filepath += template;    }
    let html: string = decoder.decode(      Deno.readFileSync(filepath),    );
    // Check if the template extends another template    const extended = html.match(/<% extends.* %>/g);    if (extended) {      extended.forEach((m: string) => {        html = html.replace(m, "");        let template = m.replace('<% extends("', "").replace('") %>', "");        template = decoder.decode(          Deno.readFileSync(this.views_path + template),        );        html = template.replace("<% yield %>", html);      });    }
    // Check for partials    let partials;    while ((partials = html.match(/<% include_partial.* %>/g))) {      partials.forEach((m: string) => {        let template = m          .replace('<% include_partial("', "")          .replace('") %>', "");        template = decoder.decode(          Deno.readFileSync(this.views_path + template),        );        html = html.replace(m, template);      });    }
    // The following code was taken from (and modified):    // https://krasimirtsonev.com/blog/article/Javascript-template-engine-in-just-20-line    // Thanks, Krasimir!    const re = /<%(.+?)\%>/g;    const reExp = /(^( )?(var|if|for|else|switch|case|break|{|}|;))(.*)?/g;    let result;    function add(line: string, js: unknown | null = null) {      js        ? (code += line.match(reExp) ? line + "\n" : "r.push(" + line + ");\n")        : (code += line != ""          ? 'r.push("' + line.replace(/"/g, '\\"') + '");\n'          : "");      return add;    }
    while ((match = re.exec(html))) {      add(html.slice(cursor, match.index));      add(match[1], true);      cursor = match.index + match[0].length;    }
    add(html.substr(cursor, html.length - cursor));    code = (code + 'return r.join(""); }').replace(/[\r\t\n]/g, " ");
    try {      if (!data) {        data = {};      }      result = new Function("obj", code).apply(data, [data]);    } catch (err) {      console.error("'" + err.message + "'", " in \n\nCode:\n", code, "\n");    }
    return result;  }}