poc-igeom/src/app/core/parser/file-parser.js

import * as ObjectClass from "./../enums/elements-class-enum";

const TYPE    =  0; // identifica se Ponto, Texto, Reta...
const ID      =  1; // identificador unico do objeto
const DEFINITION =  2; // parametros dos quais o objeto depende (exemplo Reta depende de Ponto e Ponto => "2:IDPONTO1 IDPONTO2")
const LIST     =  3; // lista de identificadores de objetos dependentes do atual
const LABEL    =  4; // definicao do rotulo (valor/nome e se escondido ou nao)
const DEFINED  =  6; // 0 ou 1 (???)
const COLOR       =  5; // cor usando valor inteiro
const HIDDEN =  7; // 0 (visivel) ou 1 (escondido)
const PIXEL     =  8; // LeScript usa (coordenada X e Y - inteiros)
const FONT     =  9; // 'Arial' T Tam: T = FONT.PLAIN, FONT.BOLD, FONT.ITALIC; Tam = 8, 9,...
                    // PROIBIDO: "Arial" T Tam, pois em caso contrario nao sera lido como parametro
                    //           usa  MARCAFNT = "\'" nao pode ser "\"" <[28/09/2006] agora vazio "">
const LABEL_COLOR = 10; // cor de rotulo (tambem um inteiro) - inserido apos iGeom versao >= 2.9.9.31

const OBJECT_LINE_REGEX = /^\{\w*(?:(?:\d+:@\|[^@]+@\|)|(?:\d+:[^,@|]+))\w*(?:,\w*(?:(?:\d+:@\|[^@]+@\|)|(?:\d+:[^,@\|]+)))+\w*\}!?$/.compile();

export class FileParser {

  /**
   * 
   * @param {string} content 
   */
  constructor(content) {
    this.content = content;
  }

  parse () {
    const objects_list = []
    this.content.split('\n')
      .filter(str => !str.match(/^[#\[]/))
      .map(str => {
        if(!OBJECT_LINE_REGEX.test(str.trim())) {
          console.error("Malformed object string in igeom file: ",str);
        } else {
          const object = this.parseObjectLine(str.trim());
          objects_list.push(object);
        }
      });
    return objects_list;
  }

  /**
   * 
   * @param {string} object_line 
   */
  parseObjectLine (object_line) {
    let current_char = '';
    let current_pos = 0;
    const map = new Map();
    while(1==1) {
      current_char = object_line[current_pos];
      if(current_char == '}') {
        current_pos += 1;
        if(current_pos == object_line.length)
          break;
        current_char = object_line[current_pos]
        current_pos += 1;
        if(current_char != '!') {
          console.warn("Malformed object string: ",object_line);
        }
        break;
      }

      if(current_char == TYPE) {
        current_pos += 2;
        let type = '';
        while(object_line[current_pos] != ',') {
          type += object_line[current_pos];
          current_pos += 1;
        }
        map.set("type", ObjectClass.fromCodeToClass(parseInt(type)));
      } else if(current_char == ID) {
        current_pos += 2;
        let id = '';
        while(object_line[current_pos] != ',') {
          id += object_line[current_pos];
          current_pos += 1;
        }
        map.set("id", parseInt(id));
      } else if(current_char == DEFINITION) {
        current_pos += 2;
        const param_list = [];
        let word = '';
        while(object_line[current_pos] != ',') {
          if(object_line[current_pos] == ' ') {
            param_list.push(Number(word));
            word = '';
          } else if(object_line[current_pos] == '@') {
            current_pos += 2
            while(1==1) {
              const char = object_line[current_pos];
              if(char == '@' && bject_line[current_pos + 1] == '|') {
                current_pos += 1;
                break;
              } else {
                word += object_line[current_pos];
              }
              current_pos += 1;
            }
          } else {
            word += object_line[current_pos];
          }
          current_pos += 1;
        }
        param_list.push(word);
        map.set("param", param_list);
      }
      if(current_char == '{' || current_char == ' ') {
        current_pos += 1;
        continue;
      } else {
        console.warn("Malformed object string: ",object_line);
        break;
      }
    }

    if(current_pos != object_line.length) {
      console.warn("Object string ",object_line, " parsing did not match its size: Processed: ",current_pos," Length: ", object_line.length);
    }
    return map;
  }

}