89 lines
3.1 KiB
TypeScript
89 lines
3.1 KiB
TypeScript
import * as MediaLibrary from 'expo-media-library';
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import { ExtendedAsset } from './types'; // Assuming ExtendedAsset is defined in types.ts
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// Helper to fetch assets with pagination and EXIF info
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const fetchAssetsWithExif = async (
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mediaType: MediaLibrary.MediaType[],
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createdAfter?: number,
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createdBefore?: number,
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descending: boolean = true // Default to descending
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): Promise<ExtendedAsset[]> => {
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let allAssets: MediaLibrary.Asset[] = [];
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let hasNextPage = true;
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let after: string | undefined = undefined;
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while (hasNextPage) {
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const media = await MediaLibrary.getAssetsAsync({
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mediaType,
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first: 500, // Fetch in batches of 500
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sortBy: [MediaLibrary.SortBy.creationTime],
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createdAfter,
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createdBefore,
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after,
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descending,
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});
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allAssets = allAssets.concat(media.assets);
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hasNextPage = media.hasNextPage;
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after = media.endCursor;
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}
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// For each asset, get full EXIF information
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const assetsWithExif = await Promise.all(
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allAssets.map(async (asset) => {
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try {
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const assetInfo = await MediaLibrary.getAssetInfoAsync(asset.id);
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return {
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...asset,
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exif: assetInfo.exif || null,
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location: assetInfo.location || null
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};
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} catch (error) {
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console.warn(`Failed to get EXIF for asset ${asset.id}:`, error);
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return asset;
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}
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})
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);
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return assetsWithExif;
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};
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// 获取指定时间范围内的媒体文件（包含 EXIF 信息），并按日期倒序
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export const getMediaByDateRange = async (startDate: Date, endDate: Date): Promise<ExtendedAsset[]> => {
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try {
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const { status } = await MediaLibrary.requestPermissionsAsync();
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if (status !== 'granted') {
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console.warn('Media library permission not granted');
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return [];
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}
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return await fetchAssetsWithExif(
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['photo', 'video'],
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startDate.getTime(),
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endDate.getTime(),
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true // Always descending for this function
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);
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} catch (error) {
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console.error('Error in getMediaByDateRange:', error);
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return [];
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}
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};
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// 获取所有需要上传的媒体文件（从某个时间点之后，按日期倒序，包含 EXIF 信息）
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export const getMediaForUpload = async (lastUploadTimestamp?: number): Promise<ExtendedAsset[]> => {
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try {
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const { status } = await MediaLibrary.requestPermissionsAsync();
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if (status !== 'granted') {
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console.warn('Media library permission not granted');
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return [];
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}
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return await fetchAssetsWithExif(
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['photo', 'video'],
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lastUploadTimestamp, // Only fetch assets created after this timestamp
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undefined, // No end date
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true // Always descending
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);
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} catch (error) {
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console.error('Error in getMediaForUpload:', error);
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return [];
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}
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}; |