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import { DataFactory, RDF } from "../rdf.ts";import { sparql, type SparqlValue } from "./sparql_tag.ts";
type Wrap = (keyword: string, value: string) => string;export const braces: Wrap = (keyword: string, value: string) =>  `${keyword} {\n${value}\n}\n`;export const parentheses: Wrap = (keyword: string, value: string) =>  `${keyword} (${value})\n`;const none: Wrap = (keyword: string, value: string) => `${keyword} ${value}\n`;
export abstract class SparqlBuilder {  protected value = "";  protected dataFactory = new DataFactory();
  public build() {    return this.value;  }
  private sparql(    strings: TemplateStringsArray,    ...values: SparqlValue[]  ) {    return !values || values.length < 1      ? sparql(strings)      : sparql(strings, ...values);  }
  protected template(    strings: TemplateStringsArray,    values: SparqlValue[],    keyword: string,    wrap: Wrap = none,  ) {    const inputSparql = this.sparql(strings, ...values);    this.value += wrap(keyword, inputSparql);    return this;  }
  protected namedNode(    stringOrNamedNode: string | RDF.NamedNode<string>,    keyword: string,    wrap: Wrap = none,  ) {    const namedNode = typeof stringOrNamedNode === "string"      ? this.dataFactory.namedNode(stringOrNamedNode)      : stringOrNamedNode;    const inputSparql = this.sparql`${namedNode}`;    this.value += wrap(keyword, inputSparql);    return this;  }
  protected number(    number: number,    keyword: string,    wrap: Wrap = none,  ) {    this.value += wrap(keyword, number.toString());    return this;  }}