Add eta support

lib/api/task.dart

@@ -78,8 +78,8 @@ class TaskDownloadSingleProgress {
   final DateTime started;
   final int downloaded;
   final double speed;
-  @JsonKey(name: 'last_updated')
-  final int lastUpdated;
+  @JsonKey(name: 'last_updated', fromJson: _fromJson, toJson: _toJson)
+  final DateTime lastUpdated;
   static DateTime _fromJson(int d) =>
       DateTime.fromMillisecondsSinceEpoch(d, isUtc: true);
   static int _toJson(DateTime d) => d.millisecondsSinceEpoch;

lib/components/task.dart

@@ -94,6 +94,7 @@ class _TaskView extends State<TaskView> {
                 onTap: () {
                   context.push("/dialog/task/${widget.task.base.id}");
                 },
+                behavior: HitTestBehavior.opaque,
                 child: Column(children: [
                   _buildText(context),
                   LinearPercentIndicator(

lib/dialog/task_page.dart

@@ -4,6 +4,7 @@ import 'package:go_router/go_router.dart';
 import 'package:percent_indicator/linear_percent_indicator.dart';
 import '../api/task.dart';
 import '../globals.dart';
+import '../utils/duration.dart';
 import '../utils/filesize.dart';
 
 class _KeyValue extends StatelessWidget {
@@ -151,7 +152,8 @@ class _TaskPage extends State<TaskPage> {
         _KeyValue(i18n.totalPages, p.totalPage.toString(), fontSize: 16),
         _KeyValue(i18n.downloadedSize2, getFileSize(p.downloadedBytes),
             fontSize: 16),
-        _KeyValue(i18n.speed, "${getFileSize((speed * 1000).toInt())}/s", fontSize: 16),
+        _KeyValue(i18n.speed, "${getFileSize((speed * 1000).toInt())}/s",
+            fontSize: 16),
       ]);
     }
     int now = 0;
@@ -199,12 +201,21 @@ class _TaskPage extends State<TaskPage> {
     }
     final p = task.progress as TaskDownloadProgess;
     if (p.details.isEmpty) return SliverToBoxAdapter(child: Container());
+    final i18n = AppLocalizations.of(context)!;
     return SliverList.builder(
       itemCount: p.details.length,
       itemBuilder: (context, index) {
         final d = p.details[index];
         final percent = d.total == 0 ? 0.0 : d.downloaded / d.total;
         final percentText = "${(percent * 100).toStringAsFixed(2)}%";
+        final avgSpeed = d.started.millisecondsSinceEpoch == 0
+            ? 0.0
+            : d.downloaded /
+                (d.lastUpdated.millisecondsSinceEpoch -
+                    d.started.millisecondsSinceEpoch);
+        final eta = d.total == 0
+            ? double.infinity
+            : (d.total - d.downloaded) / avgSpeed;
         return Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
           SelectableText("${d.name}(${d.width}x${d.height})"),
           LinearPercentIndicator(
@@ -223,7 +234,8 @@ class _TaskPage extends State<TaskPage> {
             Expanded(
                 child: Text(
                     "${getFileSize(d.downloaded)}/${getFileSize(d.total)}")),
-            Text("${getFileSize((d.speed * 1000).toInt())}/s"),
+            Text(
+                "${getFileSize((d.speed * 1000).toInt())}/s${i18n.comma}${fmtDuration(context, eta)}"),
           ]),
         ]);
       },

lib/l10n/app_en.arb

@@ -181,5 +181,13 @@
     },
     "comma": ", ",
     "downloadedSize2": "Downloaded size",
-    "speed": "Speed"
+    "speed": "Speed",
+    "days": "{num} days",
+    "@days": {
+        "placeholders": {
+            "num": {
+                "type": "int"
+            }
+        }
+    }
 }

lib/l10n/app_zh.arb

@@ -181,5 +181,13 @@
     },
     "comma": "，",
     "downloadedSize2": "已下载大小",
-    "speed": "速度"
+    "speed": "速度",
+    "days": "{num} 天",
+    "@days": {
+        "placeholders": {
+            "num": {
+                "type": "int"
+            }
+        }
+    }
 }

lib/utils/duration.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+
+String fmtDuration(BuildContext context, double ms) {
+  if (ms.isInfinite) {
+    return "∞";
+  }
+  final dur = ms.toInt() ~/ 1000;
+  String re = "";
+  if (dur >= 86400) {
+    final i18n = AppLocalizations.of(context)!;
+    re += "${i18n.days(dur ~/ 86400)} ";
+  }
+  if (dur >= 3600) {
+    re += "${(dur ~/ 3600).toString().padLeft(2, '0')}:";
+  }
+  final min = (dur ~/ 60).toString().padLeft(2, '0');
+  final secs = (dur % 60).toString().padLeft(2, '0');
+  re += "$min:$secs";
+  return re;
+}