diff options
author | (quasar) nebula <qznebula@protonmail.com> | 2023-10-26 19:30:40 -0300 |
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committer | (quasar) nebula <qznebula@protonmail.com> | 2023-10-26 19:37:14 -0300 |
commit | 855dcdbc17831809cfb3c800d378c62186702740 (patch) | |
tree | 1063567c4d6a8c1bef286ad255be4d52a061193b /src/data/composite/things/flash | |
parent | bb646f28853399a43d52a056c86d04f6a4343932 (diff) |
data: Flash.withFlashAct
Diffstat (limited to 'src/data/composite/things/flash')
-rw-r--r-- | src/data/composite/things/flash/index.js | 1 | ||||
-rw-r--r-- | src/data/composite/things/flash/withFlashAct.js | 108 |
2 files changed, 109 insertions, 0 deletions
diff --git a/src/data/composite/things/flash/index.js b/src/data/composite/things/flash/index.js new file mode 100644 index 00000000..63ac13da --- /dev/null +++ b/src/data/composite/things/flash/index.js @@ -0,0 +1 @@ +export {default as withFlashAct} from './withFlashAct.js'; diff --git a/src/data/composite/things/flash/withFlashAct.js b/src/data/composite/things/flash/withFlashAct.js new file mode 100644 index 00000000..ada2dcfe --- /dev/null +++ b/src/data/composite/things/flash/withFlashAct.js @@ -0,0 +1,108 @@ +// Gets the flash's act. This will early exit if flashActData is missing. +// By default, if there's no flash whose list of flashes includes this flash, +// the output dependency will be null; set {notFoundMode: 'exit'} to early +// exit instead. +// +// This step models with Flash.withAlbum. + +import {input, templateCompositeFrom} from '#composite'; +import {is} from '#validators'; + +import {exitWithoutDependency, withResultOfAvailabilityCheck} + from '#composite/control-flow'; +import {withPropertyFromList} from '#composite/data'; + +export default templateCompositeFrom({ + annotation: `withFlashAct`, + + inputs: { + notFoundMode: input({ + validate: is('exit', 'null'), + defaultValue: 'null', + }), + }, + + outputs: ['#flashAct'], + + steps: () => [ + // null flashActData is always an early exit. + + exitWithoutDependency({ + dependency: 'flashActData', + mode: input.value('null'), + }), + + // empty flashActData conditionally exits early or outputs null. + + withResultOfAvailabilityCheck({ + from: 'flashActData', + mode: input.value('empty'), + }).outputs({ + '#availability': '#flashActDataAvailability', + }), + + { + dependencies: [input('notFoundMode'), '#flashActDataAvailability'], + compute(continuation, { + [input('notFoundMode')]: notFoundMode, + ['#flashActDataAvailability']: flashActDataIsAvailable, + }) { + if (flashActDataIsAvailable) return continuation(); + switch (notFoundMode) { + case 'exit': return continuation.exit(null); + case 'null': return continuation.raiseOutput({'#flashAct': null}); + } + }, + }, + + withPropertyFromList({ + list: 'flashActData', + property: input.value('flashes'), + }), + + { + dependencies: [input.myself(), '#flashActData.flashes'], + compute: (continuation, { + [input.myself()]: track, + ['#flashActData.flashes']: flashLists, + }) => continuation({ + ['#flashActIndex']: + flashLists.findIndex(flashes => flashes.includes(track)), + }), + }, + + // album not found conditionally exits or outputs null. + + withResultOfAvailabilityCheck({ + from: '#flashActIndex', + mode: input.value('index'), + }).outputs({ + '#availability': '#flashActAvailability', + }), + + { + dependencies: [input('notFoundMode'), '#flashActAvailability'], + compute(continuation, { + [input('notFoundMode')]: notFoundMode, + ['#flashActAvailability']: flashActIsAvailable, + }) { + if (flashActIsAvailable) return continuation(); + switch (notFoundMode) { + case 'exit': return continuation.exit(null); + case 'null': return continuation.raiseOutput({'#flashAct': null}); + } + }, + }, + + { + dependencies: ['flashActData', '#flashActIndex'], + compute: (continuation, { + ['flashActData']: flashActData, + ['#flashActIndex']: flashActIndex, + }) => continuation.raiseOutput({ + ['#flashAct']: + flashActData[flashActIndex], + }), + }, + ], +}); |