1 | import { valid, nullish } from '@typen/nullish';
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2 |
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3 | class Chore {
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4 | fn;
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5 | #n;
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6 | #arg;
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7 | ctx;
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8 |
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9 | constructor(fn, mode) {
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10 | this.fn = fn;
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11 | this.mode = valid(mode) ? mode : fn.length;
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12 | }
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13 |
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14 | static build(fn, arg, ctx, mode) {
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15 | const method = new Chore(fn, mode);
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16 | if (valid(arg)) method.arg = arg;
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17 | if (valid(ctx)) method.ctx = ctx;
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18 | return method;
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19 | }
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20 |
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21 | static create({
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22 | fn,
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23 | arg,
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24 | ctx,
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25 | mode
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26 | }) {
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27 | return Chore.build(fn, arg, ctx, mode);
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28 | }
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29 |
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30 | get mode() {
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31 | return this.#n;
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32 | }
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33 |
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34 | set mode(n) {
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35 | this.#n = n; // const prevN = this.#n
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36 |
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37 | if (n === 0) return this.#arg = null, n; // if (n === 1) return this.#arg = arg
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38 |
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39 | const arg = this.#arg;
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40 | if (valid(arg) && n >= 2 && !Array.isArray(arg)) this.#arg = [arg];
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41 | return n;
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42 | }
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43 |
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44 | get arg() {
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45 | return this.#arg;
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46 | }
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47 |
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48 | set arg(val) {
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49 | const n = this.#n;
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50 | if (n === 0) return this.#arg = val;
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51 | if (n === 1) return this.#arg = val;
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52 | if (n >= 2) return this.#arg = Array.isArray(val) ? val : [val];
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53 | }
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54 |
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55 | get caller() {
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56 | const {
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57 | mode,
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58 | fn,
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59 | ctx,
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60 | arg
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61 | } = this;
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62 | return valid(ctx) ? nullish(arg) ? fn.bind(ctx)
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63 | : mode === 1 || !Array.isArray(arg) ? fn.bind(ctx, arg) : fn.bind(ctx, ...arg) : nullish(arg) ? fn
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64 | : mode === 1 || !Array.isArray(arg) ? () => fn(arg) : () => fn(...arg);
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65 | }
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66 |
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67 | set caller(fn) {
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68 | this.fn = fn;
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69 | if (nullish(this.mode)) this.mode = this.fn.length;
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70 | }
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71 |
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72 | get context() {
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73 | return this.ctx;
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74 | }
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75 |
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76 | set context(ctx) {
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77 | return this.ctx = ctx;
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78 | }
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79 |
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80 | invoke(arg) {
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81 | arg = arg ?? this.arg;
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82 | const {
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83 | mode,
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84 | ctx,
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85 | fn
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86 | } = this;
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87 | return valid(ctx) ? nullish(arg) ? fn.call(ctx)
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88 | : mode === 1 || !Array.isArray(arg) ? fn.call(ctx, arg) : fn.apply(ctx, arg) : nullish(arg) ? fn()
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89 | : mode === 1 || !Array.isArray(arg) ? fn(arg) : fn(...arg);
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90 | }
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91 |
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92 | }
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93 |
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94 | export { Chore };
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