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import { isObject } from '@shared/lib/utils'; |
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|
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const leafPaths = (value, prefix) => { |
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// An empty object, or PHP's [] for one, would purge the whole branch. |
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if (Array.isArray(value) && value.length === 0) return []; |
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if (!isObject(value)) return [prefix]; |
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|
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const entries = Object.entries(value); |
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if (entries.length === 0) return []; |
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|
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return entries.flatMap(([key, child]) => leafPaths(child, [...prefix, key])); |
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}; |
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|
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export const collectOwnedPaths = ({ payloads, section, roots, exclude }) => { |
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const paths = new Map(); |
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|
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for (const payload of Object.values(payloads ?? {})) { |
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const source = payload?.[section]; |
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if (!isObject(source)) continue; |
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|
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for (const key of roots) { |
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if (!(key in source)) continue; |
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|
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for (const path of leafPaths(source[key], [key])) { |
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if (exclude?.(section, path)) continue; |
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paths.set(path.join('.'), path); |
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} |
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} |
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} |
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|
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return [...paths.values()]; |
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}; |
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|
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const valueAtPath = (source, path) => |
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path.reduce( |
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(value, key) => (isObject(value) ? value[key] : undefined), |
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source, |
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); |
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|
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const withoutPath = (source, [key, ...rest]) => { |
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if (!isObject(source) || !(key in source)) return source; |
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|
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const updated = { ...source }; |
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|
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if (rest.length === 0) { |
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delete updated[key]; |
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return updated; |
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} |
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|
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const child = withoutPath(updated[key], rest); |
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|
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if (isObject(child) && Object.keys(child).length === 0) { |
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delete updated[key]; |
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} else { |
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updated[key] = child; |
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} |
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|
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return updated; |
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}; |
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|
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const withPath = (source, [key, ...rest], value) => { |
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const updated = isObject(source) ? { ...source } : {}; |
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updated[key] = |
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rest.length === 0 ? value : withPath(updated[key], rest, value); |
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return updated; |
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}; |
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|
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export const purgeOwnedPaths = (section, ownedPaths) => |
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ownedPaths.reduce((current, path) => withoutPath(current, path), section); |
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|
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// Purging first is what stops the outgoing payload's leaves surviving a switch. |
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export const applyOwnedSection = (current, incoming, ownedPaths) => { |
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const purged = purgeOwnedPaths(current, ownedPaths); |
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|
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if (!isObject(incoming)) return purged; |
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|
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return ownedPaths.reduce((section, path) => { |
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const value = valueAtPath(incoming, path); |
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return value === undefined ? section : withPath(section, path, value); |
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}, purged); |
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}; |
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|
