first commit

lib/downloadTask.js

@@ -0,0 +1,77 @@
+import { NativeModules } from 'react-native';
+const { RNBackgroundDownload } = NativeModules;
+
+export default class DownloadTask {
+    state = 'PENDING';
+    percent = 0;
+    bytesWritten = 0;
+    totalBytes = 0;
+
+    constructor(taskInfo) {
+        if (typeof taskInfo === 'string') {
+            this.id = taskInfo;
+        } else {
+            this.id = taskInfo.id;
+            this.percent = taskInfo.percent;
+            this.bytesWritten = taskInfo.bytesWritten;
+            this.totalBytes = taskInfo.totalBytes;
+        }
+    }
+
+    begin(handler) {
+        this._beginHandler = handler;
+        return this;
+    }
+
+    progress(handler) {
+        this._progressHandler = handler;
+        return this;
+    }
+
+    done(handler) {
+        this._doneHandler = handler;
+        return this;
+    }
+
+    error(handler) {
+        this._errorHandler = handler;
+        return this;
+    }
+
+    _onBegin(expectedBytes) {
+        this.state = 'DOWNLOADING';
+        this._beginHandler && this._beginHandler(expectedBytes);
+    }
+
+    _onProgress(percent, bytesWritten, totalBytes) {
+        this.percent = percent;
+        this.bytesWritten = bytesWritten;
+        this.totalBytes = totalBytes;
+        this._progressHandler && this._progressHandler(percent, bytesWritten, totalBytes);
+    }
+
+    _onDone() {
+        this.state = 'DONE';
+        this._doneHandler && this._doneHandler();
+    }
+
+    _onError(error) {
+        this.state = 'FAILED';
+        this._errorHandler && this._errorHandler(error);
+    }
+
+    pause() {
+        this.state = 'PAUSED';
+        RNBackgroundDownload.puaseTask(this.id);
+    }
+
+    resume() {
+        this.state = 'DOWNLOADING';
+        RNBackgroundDownload.resumeTask(this.id);
+    }
+
+    stop() {
+        this.state = 'STOPPED';
+        RNBackgroundDownload.stopTask(this.id);
+    }
+}