src/Form.ts

   1 import { Line } from './Line';
   2 import { InconsistencyError, NotFoundError } from './Errors';
   3
   4 export default abstract class Form {
   5   private _lines: Line<any>[] = [];
   6
   7   abstract get name(): string;
   8
   9   constructor() {
  10     this.getLines().map(this.addLine.bind(this));
  11   }
  12
  13   protected abstract getLines(): Line<any>[];
  14
  15   get allowMultipleCopies(): boolean {
  16     return false;
  17   }
  18
  19   private addLine(line: Line<any>) {
  20     try {
  21       this.getLine(line.id);
  22     } catch {
  23       this._lines.push(line);
  24       return;
  25     }
  26     throw new InconsistencyError('Cannot add a line with a duplicate identifier');
  27   }
  28
  29   getLine(id: string): Line<any> {
  30     const lines = this._lines.filter(l => l.id === id);
  31     if (lines.length == 0) {
  32       throw new NotFoundError(id);
  33     }
  34     return lines[0];
  35   }
  36 };