src/Form.ts

   1 import TaxReturn from './TaxReturn';
   2 import { Line } from './Line';
   3 import { InconsistencyError, NotFoundError } from './Errors';
   4
   5 export default abstract class Form<L extends { [key: string]: Line<any> },
   6                                    I = unknown> {
   7   abstract readonly name: string;
   8
   9   protected abstract readonly _lines: L;
  10
  11   readonly supportsMultipleCopies: boolean = false;
  12
  13   private readonly _input?: I;
  14
  15   constructor(input?: I) {
  16     this._input = input;
  17   }
  18
  19   init() {
  20     for (const id in this._lines) {
  21       let l = this._lines[id];
  22       l._id = id;
  23       l.form = this;
  24     }
  25   }
  26
  27   getLine<K extends keyof L>(id: K): L[K] {
  28     if (!(id in this._lines))
  29       throw new NotFoundError(`Form ${this.name} does not have line ${id}`);
  30     return this._lines[id];
  31   }
  32
  33   getValue<K extends keyof L>(tr: TaxReturn, id: K): ReturnType<L[K]['value']> {
  34     const line: L[K] = this.getLine(id);
  35     return line.value(tr);
  36   }
  37
  38   getInput<K extends keyof I>(name: K): I[K] {
  39     if (!(name in this._input)) {
  40       throw new NotFoundError(`No input with key ${name} on form ${this.name}`);
  41     }
  42     return this._input[name];
  43   }
  44 };