| 1 | /**
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| 2 | * Dependencies
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| 3 | */
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| 4 |
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| 5 | import Promise from 'bluebird';
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| 6 |
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| 7 | /**
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| 8 | * Private
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| 9 | */
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| 10 |
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| 11 | function noop() {
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| 12 | // No operation performed.
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| 13 | }
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| 14 |
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| 15 | /**
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| 16 | * Interface
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| 17 | */
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| 18 |
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| 19 | export default class Step {
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| 20 | constructor(pattern, fn, args = []) {
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| 21 | this.pattern = pattern;
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| 22 | this.fn = fn;
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| 23 | this.args = args;
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| 24 | }
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| 25 |
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| 26 | match(line) {
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| 27 | return line.match(this.pattern);
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| 28 | }
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| 29 |
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| 30 | runWith(context, line, cb = noop) {
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| 31 | const args = (!!line) ? this.match(line).slice(1) : this.args;
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| 32 | return Promise.try(() => (
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| 33 | this.fn.apply(context, args)
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| 34 | )).asCallback(cb);
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| 35 | }
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| 36 | }
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