52 lines
1.1 KiB
TypeScript
52 lines
1.1 KiB
TypeScript
export interface ListHistory {
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id: number;
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}
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export function getHistory(): ListHistory[] {
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const savedHistory = localStorage.getItem('listHistory')
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if (savedHistory === null) {
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return []
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}
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return JSON.parse(savedHistory)
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}
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function saveHistory(history: ListHistory[]) {
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if (history.length === 0) {
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localStorage.removeItem('listHistory')
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return
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}
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localStorage.setItem('listHistory', JSON.stringify(history))
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}
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export function saveListToHistory(list: ListHistory) {
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const history: ListHistory[] = getHistory()
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// Remove the element if it already exists in history, preventing duplicates and essentially moving it to the beginning
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history.forEach((l, i) => {
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if (l.id === list.id) {
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history.splice(i, 1)
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}
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})
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// Add the new list to the beginning of the list
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history.unshift(list)
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if (history.length > 5) {
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history.pop()
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}
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saveHistory(history)
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}
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export function removeListFromHistory(list: ListHistory) {
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const history: ListHistory[] = getHistory()
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history.forEach((l, i) => {
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if (l.id === list.id) {
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history.splice(i, 1)
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}
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})
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saveHistory(history)
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}
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