Add resuming downloads

public/locales/de.json

@@ -2,6 +2,7 @@
     "Install": "Installieren",
     "Update": "Updaten",
     "Launch": "Starten",
+    "ResumeDownload": "Download Fortsetzen",
     "Runners": "Runners",
     "Language": "Sprache",
     "Voice": "Sprachpaket",

public/locales/en-us.json

@@ -2,6 +2,7 @@
     "Install": "Install",
     "Update": "Update",
     "Launch": "Launch",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "Language",
     "Voice": "Voice Pack",

public/locales/en.json

@@ -2,6 +2,7 @@
     "Install": "Install",
     "Update": "Update",
     "Launch": "Launch",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "Language",
     "Voice": "Voice Pack",

public/locales/es.json

@@ -2,6 +2,7 @@
     "Install": "Install",
     "Update": "Update",
     "Launch": "Launch",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "Language",
     "Voice": "Voice Pack",

public/locales/fr.json

@@ -2,6 +2,7 @@
     "Install": "Install",
     "Update": "Update",
     "Launch": "Launch",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "Language",
     "Voice": "Voice Pack",

public/locales/id.json

@@ -2,6 +2,7 @@
     "Install": "Pasang",
     "Update": "Perbarui",
     "Launch": "Luncurkan",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "Bahasa",
     "Voice": "Paket Suara",

public/locales/ja.json

@@ -2,6 +2,7 @@
     "Install": "インストール",
     "Update": "アップデート",
     "Launch": "打ち上げ",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "言語",
     "Voice": "ボイスパック",

public/locales/ko.json

@@ -2,6 +2,7 @@
     "Install": "설치",
     "Update": "업데이트",
     "Launch": "발사",
+    "ResumeDownload": "Resume Download",
     "Runners": "주자",
     "Language": "언어",
     "Voice": "음성 팩",

public/locales/pt.json

@@ -2,6 +2,7 @@
     "Install": "Install",
     "Update": "Update",
     "Launch": "Launch",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "Language",
     "Voice": "Voice Pack",

public/locales/ru.json

@@ -2,6 +2,7 @@
     "Install": "Установить",
     "Update": "Обновить",
     "Launch": "Запустить",
+    "ResumeDownload": "Resume Download",
     "Runners": "Версии Wine",
     "Language": "Язык",
     "Voice": "Озвучка",

public/locales/th.json

@@ -2,6 +2,7 @@
     "Install": "Install",
     "Update": "Update",
     "Launch": "Launch",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "Language",
     "Voice": "Voice Pack",

public/locales/vi.json

@@ -2,6 +2,7 @@
     "Install": "Install",
     "Update": "Update",
     "Launch": "Launch",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "Language",
     "Voice": "Voice Pack",

public/locales/zh-cn.json

@@ -2,6 +2,7 @@
     "Install": "安装",
     "Update": "更新",
     "Launch": "发射",
+    "ResumeDownload": "Resume Download",
     "Runners": "Runners",
     "Language": "语言",
     "Voice": "语音包",

public/locales/zh-tw.json

@@ -2,6 +2,7 @@
     "Install": "安裝",
     "Update": "更新",
     "Launch": "啟動遊戲",
+    "ResumeDownload": "Resume Download",
     "Runners": "執行器",
     "Language": "界面語言",
     "Voice": "語音包",

src/ts/lib/LauncherUI.ts

@@ -1,6 +1,8 @@
 const { ipcRenderer } = require('electron');
 
 import $ from 'cash-dom';
+import path from 'path';
+import fs from 'fs';
 
 import constants from './constants';
 import LauncherLib from './LauncherLib';
@@ -15,6 +17,7 @@ type LauncherState =
     'game-update-available' |
     'game-installation-available' |
     'game-voice-update-required' |
+    'download-resumable' |
     'game-launch-available';
 
 type Theme = 'light' | 'dark';
@@ -99,6 +102,8 @@ export default class LauncherUI
                 $('#launch').text(this.i18n.translate('Launch'));
 
                 break;
+            case 'download-resumable':
+                $('#launch').text(this.i18n.translate('ResumeDownload'));
         }
 
         this._launcherState = state;
@@ -110,8 +115,11 @@ export default class LauncherUI
         const patchInfo = await LauncherLib.getPatchInfo();
 
         // Update available
-        if (LauncherLib.version != gameData.game.latest.version)
+        if (LauncherLib.version != gameData.game.latest.version) {
+            if(!fs.existsSync(path.join(constants.launcherDir, `latest-${gameData.game.latest.version}.zip`))) 
                 this.setState(LauncherLib.version === null ? 'game-installation-available' : 'game-update-available');
+            else this.setState('download-resumable');
+        }
 
         // Voice pack update required
         else if (LauncherLib.getConfig('lang.voice.active') != LauncherLib.getConfig('lang.voice.installed'))

src/ts/lib/Tools.ts

@@ -126,9 +126,20 @@ export default class Tools
     public static async downloadFile (uri: string, savePath: string, progress: null|((current: number, total: number, difference: number) => void) = null): Promise<void|Error>
     {
         return new Promise((resolve, reject) => {
-            https.get(uri, (response: any) => {
+            let rangeStart = 0;
-                let length = parseInt(response.headers['content-length'], 10),
+
-                    total  = 0;
+            if(fs.existsSync(savePath)) {
+                // Part of the file was already downloaded, resume the download
+                rangeStart = fs.statSync(savePath).size;
+            }
+            
+            https.get(uri, {
+                headers: {
+                    Range: `bytes=${rangeStart}-`
+                }
+            }, (response: any) => {
+                let length = parseInt(response.headers['content-length'], 10) + rangeStart,
+                    total  = rangeStart;
 
                 response.on('data', (chunk: any) => {
                     total += chunk.length;