提取文件上传service

service/index.ts

+export * from "./upload"
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service/upload.ts

@@ -7,3 +7,63 @@ export async function uploadFile(file: File, uploading?: (p: number) => void) {
     });
     });
     return `${sdk.global.baseUrl}${url}`;
     return `${sdk.global.baseUrl}${url}`;
 }
 }
+
+export const enum UploadType {
+    Default,
+    Image,
+    Camera
+}
+
+/**
+ * x
+ * @param type UploadType 默认值 UploadType.Default
+ * @param size 可不传 单位M
+ * @returns 
+ */
+export function chooseFileAndUpload(type = UploadType.Default, size?: number) {
+    return chooseFile(type).then(r => {
+        const sdk = Chat.getSdk();
+        return sdk.uploadFileV2(r)
+    })
+}
+
+/**
+ * 
+ * @param type UploadType
+ * @param size 可不传 单位M
+ * @returns 
+ */
+export function chooseFile(type = UploadType.Default, size?: number) {
+    return new Promise<File>((resolve, reject) => {
+        const target = document.createElement('input');
+        target.setAttribute('type', 'file');
+        // 添加这个属性，就可以唤起相机的功能
+        (type === UploadType.Camera) && target.setAttribute('capture', 'camera');
+        // 这里如果不加属性 accept 是 "image/*" 或者 "video/*"，就默认打开摄像头，既可以拍照也可以录像
+        (type === UploadType.Image) && target.setAttribute('accept', 'image/*');
+        target.setAttribute('style', 'display:none');
+        // 监听改变事件
+        target.addEventListener('change', (e: Event) => {
+            // 拿到文件对象
+            if (e && e.target) {
+                const t = e.target as HTMLInputElement;
+                const { files } = t;
+                if (files) {
+                    // 返回的是一个文件对象
+                    if (size && files[0].size >= size * 1024 * 1024) {
+                        reject(`上传的${type === UploadType.Default ? "文件" : "图片"}太大了~`);
+                        return;
+                    }
+                    resolve(files[0]);
+                    setTimeout(() => target.remove(), 200);
+                    return;
+                }
+            }
+            reject(new Error('系统不支持'));
+            setTimeout(() => target.remove(), 200);
+        });
+        document.body.appendChild(target);
+        // 这里是模拟点击了input控件
+        target.click();
+    });
+}
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