115 lines
2.8 KiB
JavaScript
115 lines
2.8 KiB
JavaScript
/**
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* 图片处理模块
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* 负责图片选择、上传、删除等操作
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*/
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import oss from '../../../utils/oss.js';
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/**
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* 选择图片
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* @param {Number} maxCount - 最大数量
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* @param {Number} currentCount - 当前数量
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* @returns {Promise} 选择的图片路径数组
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*/
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export function chooseImage(maxCount = 6, currentCount = 0) {
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const remainCount = maxCount - currentCount;
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if (remainCount <= 0) {
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wx.showToast({
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title: `最多只能上传${maxCount}张图片`,
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icon: 'none'
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});
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return Promise.resolve([]);
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}
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return new Promise((resolve, reject) => {
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wx.chooseMedia({
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count: remainCount,
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mediaType: ['image'],
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sizeType: ['compressed'],
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sourceType: ['album', 'camera'],
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success: function(res) {
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const newImages = res.tempFiles.map(function(file) {
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return file.tempFilePath;
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});
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resolve(newImages);
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},
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fail: function(err) {
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reject(err);
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}
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});
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});
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}
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/**
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* 上传图片到 OSS
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* @param {String} tempFilePath - 临时文件路径
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* @param {String} taskId - 任务ID
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* @param {String} subDir - 子目录（如 'subjective', 'essay'）
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* @returns {Promise} 上传后的图片URL
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*/
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export function uploadImage(tempFilePath, taskId, subDir = 'subjective') {
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return new Promise(function(resolve, reject) {
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(async function(){
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try {
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var cfg = await oss.getOssConfig('camp');
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if (!cfg) return reject(new Error('无法获取上传凭证'));
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var ext = 'jpg';
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if (/(\.png)$/i.test(tempFilePath)) ext = 'png';
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else if (/(\.jpeg)$/i.test(tempFilePath)) ext = 'jpeg';
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else if (/(\.webp)$/i.test(tempFilePath)) ext = 'webp';
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var key = oss.buildOssKey({
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baseDir: cfg.dir || 'camp',
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subDir: subDir,
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userId: wx.getStorageSync('wxuserid') || 'anonymous',
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taskId: taskId || 'unknown',
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ext: ext
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});
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wx.uploadFile({
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url: cfg.host,
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filePath: tempFilePath,
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name: 'file',
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formData: {
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key: key,
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policy: cfg.policy,
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'x-oss-signature': cfg.signature,
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'x-oss-signature-version': cfg.signatureVersion,
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'x-oss-credential': cfg.credential,
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'x-oss-date': cfg.date,
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'x-oss-security-token': cfg.securityToken,
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success_action_status: '200'
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},
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success: function(res){
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if (res.statusCode === 204 || res.statusCode === 200) {
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var url = cfg.host.replace(/\/$/, '') + '/' + key;
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resolve(url);
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} else {
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reject(new Error('oss_upload_failed'));
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}
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},
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fail: function(err){ reject(err); }
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});
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} catch (e) { reject(e); }
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})();
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});
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}
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/**
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* 预览图片
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* @param {String} current - 当前图片URL
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* @param {Array} urls - 所有图片URL数组
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*/
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export function previewImage(current, urls) {
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if (!current || !urls || urls.length === 0) {
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return;
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}
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wx.previewImage({
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current: current,
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urls: urls
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});
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}
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