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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| import { describe, expect, it } from 'vitest' | ||
| import { createArray } from 'zeed' | ||
| import { useLazyData } from './lazy-data' | ||
|
|
||
| describe('useLazyData', () => { | ||
| async function onFetch(offset: number, length: number) { | ||
| return createArray(length).map((_, i) => offset + i) | ||
| } | ||
|
|
||
| it('should generate fake data', async () => { | ||
| const result = await onFetch(5, 5) | ||
| expect(result).toMatchInlineSnapshot(` | ||
| [ | ||
| 5, | ||
| 6, | ||
| 7, | ||
| 8, | ||
| 9, | ||
| ] | ||
| `) | ||
| }) | ||
|
|
||
| it('should initialize with size 0', () => { | ||
| const { getSize } = useLazyData({ onFetch }) | ||
| expect(getSize()).toBe(0) | ||
| }) | ||
|
|
||
| it('should set size correctly', () => { | ||
| const { setSize, getSize, data } = useLazyData({ onFetch }) | ||
| setSize(5) | ||
| expect(getSize()).toBe(5) | ||
| expect(data.length).toBe(5) | ||
| expect(data).toMatchInlineSnapshot(` | ||
| [ | ||
| undefined, | ||
| undefined, | ||
| undefined, | ||
| undefined, | ||
| undefined, | ||
| ] | ||
| `) | ||
| }) | ||
|
|
||
| it('should reload data correctly', () => { | ||
| const { setSize, reload, data } = useLazyData({ onFetch }) | ||
| setSize(3) | ||
| reload() | ||
| // Assuming the data is reactive and we can access it directly for testing purposes | ||
| expect(data.length).toBe(3) | ||
| expect(data.every(item => item == null)).toBe(true) | ||
| }) | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| import type { LoggerInterface } from 'zeed' | ||
| import { reactive } from 'vue' | ||
| import { arrayEmptyInPlace, createArray, Logger } from 'zeed' | ||
|
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| const log: LoggerInterface = Logger('lazy-data') | ||
|
|
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| interface Config<T> { | ||
| onFetch: (from: number, length: number) => Promise<T[]> | ||
| chunkSize?: number | ||
| margin?: number | ||
| size?: number | ||
| } | ||
|
|
||
| enum ChunkStatus { | ||
| Loading = 1, | ||
| Loaded, | ||
| Error, | ||
| } | ||
|
|
||
| export function useLazyData<T>(opt: Config<T>) { | ||
| const { chunkSize = 10, margin = 5, onFetch, size = 0 } = opt | ||
|
|
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| let iteration = 0 | ||
| let dataSize = 0 | ||
| const data = reactive<(T | null)[]>([]) | ||
| const chunks: Record<number, ChunkStatus | undefined> = {} | ||
|
|
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| function reload() { | ||
| iteration++ | ||
| arrayEmptyInPlace(data) | ||
| const newData = createArray(dataSize) as (T | null)[] | ||
| data.push(...newData as any) | ||
| } | ||
|
|
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| function setSize(size: number) { | ||
| dataSize = size | ||
| reload() | ||
| } | ||
|
|
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| if (size > 0) | ||
| setSize(size) | ||
|
|
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| function setVisible(fromPos: number, toPos: number) { | ||
| log.assert(fromPos <= toPos, 'fromPos must be less than or equal to toPos') | ||
| const fromChunk = Math.floor(Math.max(0, fromPos - margin) / chunkSize) | ||
| const toChunk = Math.floor((toPos + margin) / chunkSize) * chunkSize | ||
| const iterationNow = iteration | ||
| onFetch(fromChunk * chunkSize, ((toChunk - fromChunk) * chunkSize) + chunkSize).then((result) => { | ||
| if (iterationNow !== iteration) | ||
| return | ||
| for (let i = fromChunk; i <= toChunk; i++) | ||
| chunks[i] = ChunkStatus.Loaded | ||
|
|
||
| // arraySetArrayInPlace(data, result, fromChunk * chunkSize) | ||
| }) | ||
| } | ||
|
|
||
| return { | ||
| setSize, | ||
| getSize: () => dataSize, | ||
| setVisible, | ||
| reload, | ||
| data, | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,7 +1,7 @@ | ||
| { | ||
| "name": "oui-kit", | ||
| "type": "module", | ||
| "version": "0.23.11", | ||
| "version": "0.23.12", | ||
| "author": { | ||
| "email": "[email protected]", | ||
| "name": "Dirk Holtwick", | ||
|
|
@@ -85,7 +85,6 @@ | |
| "@vitejs/plugin-vue": "^5.1.4", | ||
| "@vitest/browser": "^2.1.1", | ||
| "eslint": "^9", | ||
| "lightningcss": "^1.27.0", | ||
| "stylus": "^0.63.0", | ||
| "tsup": "^8.3.0", | ||
| "typescript": "^5.6", | ||
|
|
||
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