diff options
Diffstat (limited to 'src/data/things')
| -rw-r--r-- | src/data/things/composite.js | 422 |
1 files changed, 198 insertions, 224 deletions
diff --git a/src/data/things/composite.js b/src/data/things/composite.js index 32a61033..3e766b2c 100644 --- a/src/data/things/composite.js +++ b/src/data/things/composite.js @@ -953,11 +953,10 @@ export function exposeConstant({ }; } -// Checks the availability of a dependency or the update value and provides -// the result to later steps under '#availability' (by default). This is -// mainly intended for use by the more specific utilities, which you should -// consider using instead. Customize {mode} to select one of these modes, -// or leave unset and default to 'null': +// Checks the availability of a dependency and provides the result to later +// steps under '#availability' (by default). This is mainly intended for use +// by the more specific utilities, which you should consider using instead. +// Customize {mode} to select one of these modes, or default to 'null': // // * 'null': Check that the value isn't null (and not undefined either). // * 'empty': Check that the value is neither null nor an empty array. @@ -966,274 +965,249 @@ export function exposeConstant({ // (nor an empty array). Keep in mind this will also be false // for values like zero and the empty string! // -export function withResultOfAvailabilityCheck({ - fromUpdateValue, - fromDependency, - modeDependency, - mode = 'null', - into = '#availability', -}) { - if (!['null', 'empty', 'falsy'].includes(mode)) { - throw new TypeError(`Expected mode to be null, empty, or falsy`); - } - if (fromUpdateValue && fromDependency) { - throw new TypeError(`Don't provide both fromUpdateValue and fromDependency`); - } +const availabilityCheckMode = { + validate: oneOf('null', 'empty', 'falsy'), + defaultValue: 'null', +}; - if (!fromUpdateValue && !fromDependency) { - throw new TypeError(`Missing dependency name (or fromUpdateValue)`); - } +export const withResultOfAvailabilityCheck = templateCompositeFrom({ + annotation: `withResultOfAvailabilityCheck`, - const checkAvailability = (value, mode) => { - switch (mode) { - case 'null': return value !== null && value !== undefined; - case 'empty': return !empty(value); - case 'falsy': return !!value && (!Array.isArray(value) || !empty(value)); - default: return false; - } - }; + inputs: { + from: input(), + mode: input(availabilityCheckMode), + }, - if (fromDependency) { - return { - annotation: `withResultOfAvailabilityCheck.fromDependency`, - flags: {expose: true, compose: true}, - expose: { - mapDependencies: {from: fromDependency}, - mapContinuation: {into}, - options: {mode}, - compute: ({from, '#options': {mode}}, continuation) => - continuation({into: checkAvailability(from, mode)}), - }, - }; - } else { - return { - annotation: `withResultOfAvailabilityCheck.fromUpdateValue`, - flags: {expose: true, compose: true}, - expose: { - mapContinuation: {into}, - options: {mode}, - transform: (value, {'#options': {mode}}, continuation) => - continuation(value, {into: checkAvailability(value, mode)}), - }, - }; - } -} + outputs: { + into: '#availability', + }, -// Exposes a dependency as it is, or continues if it's unavailable. -// See withResultOfAvailabilityCheck for {mode} options! -export const exposeDependencyOrContinue = - templateCompositeFrom({ - annotation: `exposeDependencyOrContinue`, + steps: [ + { + dependencies: [input('from'), input('mode')], - inputs: { - dependency: input(), - mode: input.default('null'), - }, + compute: (continuation, { + [input('from')]: dependency, + [input('mode')]: mode, + }) => { + let availability; - steps: () => [ - withResultOfAvailabilityCheck({ - from: input('dependency'), - mode: input('mode'), - }), - - { - dependencies: ['#availability'], - compute: (continuation, { - ['#availability']: availability, - }) => - (availability - ? continuation() - : continuation.raise()), - }, + switch (mode) { + case 'null': + availability = value !== null && value !== undefined; + break; + + case 'empty': + availability = !empty(value); + break; + + case 'falsy': + availability = !!value && (!Array.isArray(value) || !empty(value)); + break; + } - { - dependencies: [input('#dependency')], - compute: (continuation, { - [input('#dependency')]: dependency, - }) => - continuation.exit(dependency), + return continuation({into: availability}); }, - ], - }); + }, + ], +}); -// Exposes the update value of an {update: true} property as it is, -// or continues if it's unavailable. See withResultOfAvailabilityCheck -// for {mode} options! -export function exposeUpdateValueOrContinue({ - mode = 'null', -} = {}) { - return compositeFrom(`exposeUpdateValueOrContinue`, [ +// Exposes a dependency as it is, or continues if it's unavailable. +// See withResultOfAvailabilityCheck for {mode} options! +export const exposeDependencyOrContinue = templateCompositeFrom({ + annotation: `exposeDependencyOrContinue`, + + inputs: { + dependency: input(), + mode: input(availabilityCheckMode), + }, + + steps: () => [ withResultOfAvailabilityCheck({ - fromUpdateValue: true, - mode, + from: input('dependency'), + mode: input('mode'), }), { - dependencies: ['#availability'], - compute: ({'#availability': availability}, continuation) => + dependencies: ['#availability', input('dependency')], + compute: (continuation, { + ['#availability']: availability, + [input('dependency')]: dependency, + }) => (availability - ? continuation() - : continuation.raise()), + ? continuation.exit(dependency) + : continuation()), }, + ], +}); - { - transform: (value, continuation) => - continuation.exit(value), - }, - ]); -} +// Exposes the update value of an {update: true} property as it is, +// or continues if it's unavailable. See withResultOfAvailabilityCheck +// for {mode} options! +export const exposeUpdateValueOrContinue = templateCompositeFrom({ + annotation: `exposeUpdateValueOrContinue`, -// Early exits if an availability check has failed. -// This is for internal use only - use `exitWithoutDependency` or -// `exitWithoutUpdateValue` instead. -export function exitIfAvailabilityCheckFailed({ - availability = '#availability', - value = null, -} = {}) { - return compositeFrom(`exitIfAvailabilityCheckFailed`, [ - { - mapDependencies: {availability}, - compute: ({availability}, continuation) => - (availability - ? continuation.raise() - : continuation()), - }, + inputs: { + mode: input(availabilityCheckMode), + }, - { - options: {value}, - compute: ({'#options': {value}}, continuation) => - continuation.exit(value), - }, - ]); -} + steps: () => [ + exposeDependencyOrContinue({ + dependency: input.updateValue(), + mode: input('mode'), + }), + ], +}); // Early exits if a dependency isn't available. // See withResultOfAvailabilityCheck for {mode} options! -export function exitWithoutDependency({ - dependency, - mode = 'null', - value = null, -}) { - return compositeFrom(`exitWithoutDependency`, [ - withResultOfAvailabilityCheck({fromDependency: dependency, mode}), - exitIfAvailabilityCheckFailed({value}), - ]); -} +export const exitWithoutDependency = templateCompositeFrom({ + annotation: `exitWithoutDependency`, -// Early exits if this property's update value isn't available. -// See withResultOfAvailabilityCheck for {mode} options! -export function exitWithoutUpdateValue({ - mode = 'null', - value = null, -} = {}) { - return compositeFrom(`exitWithoutUpdateValue`, [ - withResultOfAvailabilityCheck({fromUpdateValue: true, mode}), - exitIfAvailabilityCheckFailed({value}), - ]); -} + inputs: { + dependency: input.required(), + mode: input(availabilityCheckMode), + value: input({defaultValue: null}), + }, -// Raises if a dependency isn't available. -// See withResultOfAvailabilityCheck for {mode} options! -export function raiseWithoutDependency({ - dependency, - mode = 'null', - map = {}, - raise = {}, -}) { - return compositeFrom(`raiseWithoutDependency`, [ - withResultOfAvailabilityCheck({fromDependency: dependency, mode}), + steps: [ + withResultOfAvailabilityCheck({ + from: input('dependency'), + mode: input('mode'), + }), { - dependencies: ['#availability'], - compute: ({'#availability': availability}, continuation) => + dependencies: ['#availability', input('value')], + continuation: (continuation, { + ['#availability']: availability, + [input('value')]: value, + }) => (availability - ? continuation.raise() - : continuation()), + ? continuation() + : continuation.exit(value)), }, + ], +}); - { - options: {raise}, - mapContinuation: map, - compute: ({'#options': {raise}}, continuation) => - continuation.raiseAbove(raise), - }, - ]); -} +// Early exits if this property's update value isn't available. +// See withResultOfAvailabilityCheck for {mode} options! +export const exitWithoutUpdateValue = templateCompositeFrom({ + annotation: `exitWithoutUpdateValue`, + + inputs: { + mode: input(availabilityCheckMode), + value: input({defaultValue: null}), + }, + + steps: [ + exitWithoutDependency({ + dependency: input.updateValue(), + mode: input('mode'), + }), + ], +}); -// Raises if this property's update value isn't available. +// Raises if a dependency isn't available. // See withResultOfAvailabilityCheck for {mode} options! -export function raiseWithoutUpdateValue({ - mode = 'null', - map = {}, - raise = {}, -} = {}) { - return compositeFrom(`raiseWithoutUpdateValue`, [ - withResultOfAvailabilityCheck({fromUpdateValue: true, mode}), +export const raiseOutputWithoutDependency = templateCompositeFrom({ + annotation: `raiseOutputWithoutDependency`, + + inputs: { + dependency: input.required(), + mode: input(availabilityCheckMode), + output: input({defaultValue: {}}), + }, + + steps: [ + withResultOfAvailabilityCheck({ + from: input('dependency'), + mode: input('mode'), + }), { - dependencies: ['#availability'], - compute: ({'#availability': availability}, continuation) => + dependencies: ['#availability', input('output')], + compute: (continuation, { + ['#availability']: availability, + [input('output')]: output, + }) => (availability - ? continuation.raise() - : continuation()), + ? continuation() + : continuation.raiseOutputAbove(output)), }, + ], +}); - { - options: {raise}, - mapContinuation: map, - compute: ({'#options': {raise}}, continuation) => - continuation.raiseAbove(raise), - }, - ]); -} +// Raises if this property's update value isn't available. +// See withResultOfAvailabilityCheck for {mode} options! +export const raiseOutputWithoutUpdateValue = templateCompositeFrom({ + annotation: `raiseOutputWithoutUpdateValue`, -// Turns an updating property's update value into a dependency, so it can be -// conveniently passed to other functions. -export function withUpdateValueAsDependency({ - into = '#updateValue', -} = {}) { - return { - annotation: `withUpdateValueAsDependency`, - flags: {expose: true, compose: true}, + inputs: { + mode: input(availabilityCheckMode), + output: input({defaultValue: {}}), + }, - expose: { - mapContinuation: {into}, - transform: (value, continuation) => - continuation(value, {into: value}), + steps: [ + withResultOfAvailabilityCheck({ + from: input.updateValue(), + mode: input('mode'), + }), + + { + dependencies: ['#availability', input('output')], + compute: (continuation, { + ['#availability']: availability, + [input('output')]: output, + }) => + (availability + ? continuation() + : continuation.raiseOutputAbove(output)), }, - }; -} + ], +}); // Gets a property of some object (in a dependency) and provides that value. // If the object itself is null, or the object doesn't have the listed property, // the provided dependency will also be null. -export function withPropertyFromObject({ - object, - property, - into = null, -}) { - into ??= - (object.startsWith('#') - ? `${object}.${property}` - : `#${object}.${property}`); +export const withPropertyFromObject = templateCompositeFrom({ + annotation: `withPropertyFromObject`, - return { - annotation: `withPropertyFromObject`, - flags: {expose: true, compose: true}, + inputs: { + object: input({type: 'object', null: true}), + property: input.required({type: 'string'}), + } - expose: { - mapDependencies: {object}, - mapContinuation: {into}, - options: {property}, + outputs: { + into: { + dependencies: [ + input.staticDependency('object'), + input.staticValue('property'), + ], + + default: ({ + [input.staticDependency('object')]: object, + [input.staticValue('property')]: property, + }) => + (object.startsWith('#') + ? `${object}.${property}` + : `#${object}.${property}`), + }, + }, - compute: ({object, '#options': {property}}, continuation) => - (object === null || object === undefined + steps: [ + { + dependencies: [input('object'), input('property')], + compute: (continuation, { + [input('object')]: object, + [input('property')]: property, + }) => + (object === null ? continuation({into: null}) : continuation({into: object[property] ?? null})), }, - }; -} + ], +}); // Gets the listed properties from some object, providing each property's value // as a dependency prefixed with the same name as the object (by default). |