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60 lines
2.1 KiB
TypeScript
60 lines
2.1 KiB
TypeScript
// gomuks - A Matrix client written in Go.
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// Copyright (C) 2024 Tulir Asokan
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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const minSizeForSet = 10
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export function listDiff<T>(newArr: T[], oldArr: T[]): [added: T[], removed: T[]] {
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if (oldArr.length < minSizeForSet && newArr.length < minSizeForSet) {
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return [
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newArr.filter(item => !oldArr.includes(item)),
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oldArr.filter(item => !newArr.includes(item)),
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]
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}
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const oldSet = new Set(oldArr)
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const newSet = new Set(newArr)
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return [
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newArr.filter(item => !oldSet.has(item)),
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oldArr.filter(item => !newSet.has(item)),
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]
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}
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export function objectDiff<T>(
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newObj: Record<string, T>,
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oldObj: Record<string, T>,
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defaultValue: T,
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prevDefaultValue?: T,
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): Map<string, { old: T, new: T }>
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export function objectDiff<T>(
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newObj: Record<string, T>,
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oldObj: Record<string, T>,
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): Map<string, { old?: T, new?: T }>
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export function objectDiff<T>(
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newObj: Record<string, T>,
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oldObj: Record<string, T>,
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defaultValue?: T,
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prevDefaultValue?: T,
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): Map<string, { old?: T, new?: T }> {
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const keys = new Set(Object.keys(oldObj).concat(Object.keys(newObj)))
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const diff = new Map<string, { old?: T, new?: T }>()
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for (const key of keys) {
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const oldVal = Object.prototype.hasOwnProperty.call(oldObj, key) ? oldObj[key] :
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(prevDefaultValue ?? defaultValue)
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const newVal = Object.prototype.hasOwnProperty.call(newObj, key) ? newObj[key] : defaultValue
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if (oldVal !== newVal) {
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diff.set(key, { old: oldVal, new: newVal })
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}
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}
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return diff
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}
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