add invoice pdf

lib/helpers/api_helper.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ -5,9 +6,11 @@ import 'package:device_info/device_info.dart';
 import 'package:dio/dio.dart';
 import 'package:fcs/domain/vo/status.dart';
 import 'package:logging/logging.dart';
+import 'package:path_provider/path_provider.dart';
 
 import '../config.dart';
 import 'dev_info.dart';
+import 'firebase_helper.dart';
 
 final log = Logger('requestAPI');
 
@@ -146,3 +149,92 @@ Future<dynamic> requestDownloadPDFAPI(String path, method,
     throw e;
   }
 }
+
+typedef OnDownloadDone(File file);
+// request makes http request
+// if token is null
+Future<dynamic> requestDownload(String path, method,
+    {dynamic payload,
+    String token,
+    String url,
+    String filePath,
+    OnDownloadDone onDownloadDone}) async {
+  DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
+  AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
+  String deviceName = "${androidInfo.model}(${androidInfo.id})";
+  log.info("device:${androidInfo.androidId},deviceName:$deviceName");
+
+  var bytes = utf8.encode(payload);
+  var base64Str = base64.encode(bytes);
+  String escapePayload = HtmlEscape().convert(base64Str);
+
+  try {
+    String baseUrl = url == null ? Config.instance.apiURL : url;
+    log.info("Path:$baseUrl$path");
+    HttpClient client = new HttpClient();
+    // var _downloadData = StringBuffer();
+    var request = await client.postUrl(Uri.parse("$baseUrl$path"));
+    request.headers.set("Project-ID", Config.instance.reportProjectID);
+    if (token != null) {
+      request.headers.set("Token", token);
+    }
+    if (androidInfo.androidId != null) {
+      request.headers.set("Device", androidInfo.androidId + ":" + deviceName);
+    }
+    request.headers
+        .set(HttpHeaders.contentTypeHeader, 'application/json; charset=utf-8');
+    request.headers.set("payload", escapePayload);
+    request.write(payload);
+    // request.write(escapePayload);
+    var response = await request.close();
+    print("headers:${response.headers}");
+    var _downloadData = List<int>();
+    var cd = response.headers.value("content-disposition");
+    String fileName = "download.csv";
+    if (cd != null && cd.contains("filename=")) {
+      fileName = cd.substring(cd.indexOf("=") + 1);
+    }
+
+    var file = filePath + "/" + fileName;
+    var fileSave = new File(filePath + "/" + fileName);
+    response.listen((d) => _downloadData.addAll(d), onDone: () async {
+      await fileSave.writeAsBytes(_downloadData);
+      if (onDownloadDone != null) {
+        onDownloadDone(fileSave);
+      }
+
+      // final message = await OpenFile.open(file);
+      // log.info("Open file result:${message.message}");
+      // if (message.message != "done") {
+      //   throw Exception(message.message);
+      // }
+      // await Share.file(fileName, fileName, _downloadData,
+      //     downloadType == DownloadType.CSV ? "text/csv" : "application/pdf");
+    });
+  } catch (e) {
+    e.toString();
+    log.warning("path:$path, api:$e");
+    throw e;
+  }
+}
+
+Future<File> downloadPDF(
+    String templateName, Map<String, dynamic> values) async {
+  final completer = Completer<File>();
+
+  final directory = await getApplicationSupportDirectory();
+  String path = ('${directory.path}');
+  log.info("download file path:$path");
+
+  var data = {"template_name": templateName, "data": values};
+  print("payload:$data");
+
+  await requestDownload("/api/pdf", "POST",
+      filePath: path,
+      url: Config.instance.reportURL,
+      token: await getToken(),
+      payload: jsonEncode(data), onDownloadDone: (f) async {
+    completer.complete(f);
+  });
+  return completer.future;
+}

lib/helpers/cache_mgr.dart

@@ -0,0 +1,12 @@
+import 'package:flutter_cache_manager/flutter_cache_manager.dart';
+
+class PdfCacheMgr {
+  static const key = 'pdfs';
+  static CacheManager pdfs = CacheManager(
+    Config(
+      key,
+      stalePeriod: const Duration(days: 7),
+      maxNrOfCacheObjects: 20,
+    ),
+  );
+}