« get me outta code hell

raiseOutputWithoutDependency.js « control-flow « composite « data « src - hsmusic-wiki - HSMusic - static wiki software cataloguing collaborative creation
about summary refs log tree commit diff
path: root/src/data/composite/control-flow/raiseOutputWithoutDependency.js
blob: 03d8036a967b92b4fc1c113a73b6b25f359dcd5c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
// Raises if a dependency isn't available.
// See withResultOfAvailabilityCheck for {mode} options.

import {input, templateCompositeFrom} from '#composite';

import inputAvailabilityCheckMode from './inputAvailabilityCheckMode.js';
import withResultOfAvailabilityCheck from './withResultOfAvailabilityCheck.js';

export default templateCompositeFrom({
  annotation: `raiseOutputWithoutDependency`,

  inputs: {
    dependency: input({acceptsNull: true}),
    mode: inputAvailabilityCheckMode(),
    output: input.staticValue({defaultValue: {}}),
  },

  outputs: ({
    [input.staticValue('output')]: output,
  }) => Object.keys(output),

  steps: () => [
    withResultOfAvailabilityCheck({
      from: input('dependency'),
      mode: input('mode'),
    }),

    {
      dependencies: ['#availability', input('output')],
      compute: (continuation, {
        ['#availability']: availability,
        [input('output')]: output,
      }) =>
        (availability
          ? continuation()
          : continuation.raiseOutputAbove(output)),
    },
  ],
});