Added game pre-downloading feature

- decreased splash window size
- added `Game.getLatestData()` result caching, so basically every
  `Game` and `Voice` method and field now caches most of the data
- Made `Game.predownloadUpdate()` method
- Made `Game.isUpdatePredownloaded()` method
- Made `Voice.predownloadUpdate()` method
- Made `Voice.isUpdatePredownloaded()` method
- fixed `Cache.get()` method work
- now launcher window hides when you launch the game
- added `pre_download_game` API field type definition
- added game pre-downloading button

README.md

@@ -168,7 +168,7 @@ This is our current roadmap goals. You can find older ones [here](ROADMAP.md)
 * <s>Debugger</s>
 * <s>Splash screen</s>
 * <s>Theming system</s>
-* Game pre-installation
+* <s>Game pre-installation</s>
 * Launcher auto-updates
 * Statistics window
 * Chengelog window

src/index.svelte

@@ -5,9 +5,6 @@
 <script lang="ts">
     import { onMount } from 'svelte';
 
-    import Gear from '/src/assets/images/gear.png';
-    import GearActive from '/src/assets/images/gear-active.png';
-
     import Window from './ts/neutralino/Window';
 
     import Launcher from './ts/Launcher';
@@ -15,11 +12,15 @@
     import Game from './ts/Game';
     import Background from './ts/launcher/Background';
 
+    import Gear from './assets/images/gear.png';
+    import GearActive from './assets/images/gear-active.png';
+    import Download from './assets/images/cloud-download.png';
+
     Neutralino.events.on('ready', () => {
         Window.open('splash', {
             title: 'Splash',
-            width: 400,
-            height: 500,
+            width: 300,
+            height: 400,
             borderless: true,
             exitProcessOnClose: false
         });
@@ -82,5 +83,9 @@
         <img src={GearActive} class="active" alt="Settings">
     </div>
     
+    <button class="button hint--left hint--small" aria-label="Pre-download the game" id="predownload">
+        <img src={Download} alt="Download" />
+    </button>
+
     <button class="button" id="launch">Launch</button>
 </main>

src/sass/index.sass

@@ -35,16 +35,32 @@
     background-color: #7284b6
 
 #launch
+    position: absolute
+
     width: 238px
     height: 64px
-    
-    font-size: 22px
-
-    position: absolute
 
     right: 128px
     bottom: 64px
 
+    font-size: 22px
+
+#predownload
+    position: absolute
+    display: none
+
+    width: 52px
+    height: 52px
+
+    right: 386px
+    bottom: 70px
+
+    border-radius: 32px
+
+    img
+        width: 60%
+        margin: auto
+
 #settings
     width: 76px
     height: 76px

src/sass/splash.sass

@@ -7,11 +7,13 @@
         background-color: map.get($theme-map, "background")
 
         div
-            width: 60%
-            margin: 56px auto 0 auto
+            width: 80%
+            margin: 42px auto 0
 
             img
-                width: 100%
+                width: 80%
+                display: block
+                margin: 0 auto 16px auto
                 image-rendering: optimizeQuality
 
             h2, p

src/ts/Game.ts

@@ -11,6 +11,8 @@ import AbstractInstaller from './core/AbstractInstaller';
 import Domain from './core/Domain';
 import promisify from './core/promisify';
 import Debug, { DebugThread } from './core/Debug';
+import Downloader, { Stream as DownloadingStream } from './core/Downloader';
+import Cache from './core/Cache';
 
 declare const Neutralino;
 
@@ -67,12 +69,24 @@ export default class Game
 
             if (response.ok)
             {
-                const json: ServerResponse = JSON.parse(await response.body());
+                const cache = await Cache.get('Game.getLatestData.ServerResponse');
 
-                if (json.message == 'OK')
-                    resolve(json.data);
+                if (cache && !cache.expired)
+                    resolve(cache.value as Data);
 
-                else reject(new Error(`${constants.placeholders.uppercase.company}'s versions server responds with an error: [${json.retcode}] ${json.message}`));
+                else
+                {
+                    const json: ServerResponse = JSON.parse(await response.body());
+
+                    if (json.message == 'OK')
+                    {
+                        Cache.set('Game.getLatestData.ServerResponse', json.data, 24 * 3600);
+
+                        resolve(json.data);
+                    }
+
+                    else reject(new Error(`${constants.placeholders.uppercase.company}'s versions server responds with an error: [${json.retcode}] ${json.message}`));
+                }
             }
 
             else reject(new Error(`${constants.placeholders.uppercase.company}'s versions server is unreachable`));
@@ -141,16 +155,19 @@ export default class Game
     /**
      * Get the game installation stream
      * 
+     * @param version current game version to download difference from
+     * 
      * @returns null if the version can't be found
      * @returns Error if company's servers are unreachable or they responded with an error
      */
     public static update(version: string|null = null): Promise<Stream|null>
     {
-        Debug.log(
-            version !== null ?
-            `Updating the game from the ${version} version` :
-            'Installing the game'
-        );
+        Debug.log({
+            function: 'Game.update',
+            message: version !== null ?
+                `Updating the game from the ${version} version` :
+                'Installing the game'
+        });
 
         return new Promise((resolve, reject) => {
             (version === null ? this.latest : this.getDiff(version))
@@ -159,6 +176,60 @@ export default class Game
         });
     }
 
+    /**
+     * Pre-download the game update
+     * 
+     * @param version current game version to download difference from
+     * 
+     * @returns null if the game pre-downloading is not available. Otherwise - downloading stream
+     * @returns Error if company's servers are unreachable or they responded with an error
+     */
+    public static predownloadUpdate(version: string|null = null): Promise<DownloadingStream|null>
+    {
+        const debugThread = new DebugThread('Game.predownloadUpdate', 'Predownloading game data...')
+
+        return new Promise((resolve) => {
+            this.getLatestData()
+                .then((data) => {
+                    if (data.pre_download_game)
+                    {
+                        let path = data.pre_download_game.latest.path;
+
+                        if (version !== null)
+                            for (const diff of data.pre_download_game.diffs)
+                                if (diff.version == version)
+                                {
+                                    path = diff.path;
+
+                                    break;
+                                }
+
+                        debugThread.log(`Downloading update from the path: ${path}`);
+
+                        constants.paths.launcherDir.then((dir) => {
+                            Downloader.download(path, `${dir}/game-predownloaded.zip`)
+                                .then((stream) => resolve(stream));
+                        });
+                    }
+
+                    else resolve(null);
+                })
+                .catch((error) => resolve(error));
+        });
+    }
+
+    /**
+     * Checks whether the update was downloaded or not
+     */
+    public static isUpdatePredownloaded(): Promise<boolean>
+    {
+        return new Promise(async (resolve) => {
+            Neutralino.filesystem.getStats(`${await constants.paths.launcherDir}/game-predownloaded.zip`)
+                .then(() => resolve(true))
+                .catch(() => resolve(false));
+        });
+    }
+
     /**
      * Check if the telemetry servers are disabled
      */

src/ts/Voice.ts

@@ -5,7 +5,8 @@ import constants from './Constants';
 import Game from './Game';
 import AbstractInstaller from './core/AbstractInstaller';
 import Configs from './Configs';
-import Debug from './core/Debug';
+import Debug, { DebugThread } from './core/Debug';
+import Downloader, { Stream as DownloadingStream } from './core/Downloader';
 
 declare const Neutralino;
 
@@ -118,13 +119,14 @@ export default class Voice
      * @returns null if the language or the version can't be found
      * @returns rejects Error object if company's servers are unreachable or they responded with an error
      */
-    public static update(lang: string|null = null, version: string|null = null): Promise<Stream|null>
+    public static update(lang: string, version: string|null = null): Promise<Stream|null>
     {
-        Debug.log(
-            version !== null ?
-            `Updating the voice package from the ${version} version` :
-            'Installing the voice package'
-        );
+        Debug.log({
+            function: 'Voice.update',
+            message: version !== null ?
+                `Updating the voice package from the ${version} version` :
+                'Installing the voice package'
+        });
 
         return new Promise((resolve, reject) => {
             (version === null ? this.latest : this.getDiff(version))
@@ -142,6 +144,65 @@ export default class Voice
                 .catch((error) => reject(error));
         });
     }
+
+    /**
+     * Pre-download the game's voice update
+     * 
+     * @param version current game version to download difference from
+     * 
+     * @returns null if the game pre-downloading is not available or the language wasn't found. Otherwise - downloading stream
+     * @returns Error if company's servers are unreachable or they responded with an error
+     */
+    public static predownloadUpdate(lang: string, version: string|null = null): Promise<DownloadingStream|null>
+    {
+        const debugThread = new DebugThread('Voice.predownloadUpdate', 'Predownloading game voice data...')
+
+        return new Promise((resolve) => {
+            Game.getLatestData()
+                .then((data) => {
+                    if (data.pre_download_game)
+                    {
+                        let voicePack = data.pre_download_game.latest.voice_packs.filter(voice => voice.language === lang);
+
+                        if (version !== null)
+                            for (const diff of data.pre_download_game.diffs)
+                                if (diff.version == version)
+                                {
+                                    voicePack = diff.voice_packs.filter(voice => voice.language === lang);
+
+                                    break;
+                                }
+
+                        if (voicePack.length === 1)
+                        {
+                            debugThread.log(`Downloading update from the path: ${voicePack[0].path}`);
+
+                            constants.paths.launcherDir.then((dir) => {
+                                Downloader.download(voicePack[0].path, `${dir}/voice-${lang}-predownloaded.zip`)
+                                    .then((stream) => resolve(stream));
+                            });
+                        }
+
+                        else resolve(null);
+                    }
+
+                    else resolve(null);
+                })
+                .catch((error) => resolve(error));
+        });
+    }
+
+    /**
+     * Checks whether the update was downloaded or not
+     */
+    public static isUpdatePredownloaded(lang: string): Promise<boolean>
+    {
+        return new Promise(async (resolve) => {
+            Neutralino.filesystem.getStats(`${await constants.paths.launcherDir}/voice-${lang}-predownloaded.zip`)
+                .then(() => resolve(true))
+                .catch(() => resolve(false));
+        });
+    }
 }
 
 export { Stream };

src/ts/core/Cache.ts

@@ -1,4 +1,5 @@
 import constants from '../Constants';
+import Debug from './Debug';
 
 type Record = {
     expired: boolean;
@@ -9,6 +10,10 @@ declare const Neutralino;
 
 export default class Cache
 {
+    // Locally stored cache to not to access
+    // cache.json file every time we want to find something
+    protected static cache: object|null = null;
+
     /**
      * Get cached value
      * 
@@ -17,19 +22,44 @@ export default class Cache
     public static get(name: string): Promise<Record|null>
     {
         return new Promise(async (resolve) => {
-            Neutralino.filesystem.readFile(await constants.paths.cache)
-                .then((cache) => {
-                    cache = JSON.parse(cache);
+            if (this.cache !== null && this.cache[name] !== undefined)
+            {
+                Debug.log({
+                    function: 'Cache.get',
+                    message: [
+                        `Resolved ${this.cache[name].expired ? 'expired' : 'unexpired'} hot cache record`,
+                        `[name] ${name}`,
+                        `[value]: ${this.cache[name].value}`
+                    ]
+                });
 
-                    if (cache[name] === undefined)
+                resolve(this.cache[name]);
+            }
+            
+            else Neutralino.filesystem.readFile(await constants.paths.cache)
+                .then((cache) => {
+                    this.cache = JSON.parse(cache);
+
+                    if (this.cache![name] === undefined)
                         resolve(null);
 
                     else
                     {
-                        resolve({
-                            expired: cache[name].ttl !== null ? Date.now() > cache[name].ttl * 1000 : false,
-                            value: JSON.parse(atob(cache[name].value))
+                        const output = {
+                            expired: this.cache![name].ttl !== null ? Date.now() > this.cache![name].ttl * 1000 : false,
+                            value: this.cache![name].value
+                        };
+
+                        Debug.log({
+                            function: 'Cache.get',
+                            message: [
+                                `Resolved ${output.expired ? 'expired' : 'unexpired'} cache`,
+                                `[name] ${name}`,
+                                `[value]: ${JSON.stringify(output.value)}`
+                            ]
                         });
+
+                        resolve(output);
                     }
                 })
                 .catch(() => resolve(null));
@@ -49,19 +79,40 @@ export default class Cache
     {
         return new Promise((resolve) => {
             constants.paths.cache.then((cacheFile) => {
-                let cache = {};
+                if (this.cache === null)
+                {
+                    Neutralino.filesystem.readFile(cacheFile)
+                        .then((cacheRaw) => 
+                        {
+                            this.cache = JSON.parse(cacheRaw);
 
-                Neutralino.filesystem.readFile(cacheFile)
-                    .then((cacheRaw) => cache = JSON.parse(cacheRaw))
-                    .catch(() => {});
+                            writeCache();
+                        })
+                        .catch(() => {
+                            this.cache = {};
 
-                cache[name] = {
-                    ttl: ttl !== null ? Math.round(Date.now() / 1000) + ttl : null,
-                    value: btoa(JSON.stringify(value))
+                            writeCache();
+                        });
+                }
+
+                const writeCache = () => {
+                    Debug.log({
+                        function: 'Cache.set',
+                        message: [
+                            'Caching data:',
+                            `[ttl] ${ttl}`,
+                            `[value] ${JSON.stringify(value)}`
+                        ]
+                    });
+    
+                    this.cache![name] = {
+                        ttl: ttl !== null ? Math.round(Date.now() / 1000) + ttl : null,
+                        value: value
+                    };
+    
+                    Neutralino.filesystem.writeFile(cacheFile, JSON.stringify(this.cache))
+                        .then(() => resolve());
                 };
-
-                Neutralino.filesystem.writeFile(cacheFile, JSON.stringify(cache))
-                    .then(() => resolve());
             });
         });
     }

src/ts/launcher/State.ts

@@ -14,6 +14,7 @@ export default class State
     public launcher: Launcher;
 
     public launchButton: HTMLElement;
+    public predownloadButton: HTMLElement;
 
     protected _state: LauncherState = 'game-launch-available';
 
@@ -34,6 +35,7 @@ export default class State
         this.launcher = launcher;
 
         this.launchButton = <HTMLElement>document.getElementById('launch');
+        this.predownloadButton = <HTMLElement>document.getElementById('predownload');
 
         this.launchButton.onclick = () => {
             if (this.events[this._state])
@@ -42,14 +44,30 @@ export default class State
 
                 this.events[this._state].then((event) => {
                     event.default(this.launcher).then(() => {
-                        this.launchButton.style['display'] = 'block';
-
-                        this.update();
+                        this.update().then(() => {
+                            this.launchButton.style['display'] = 'block';
+                        });
                     });
                 });
             }
         };
 
+        this.predownloadButton.onclick = () => {
+            this.launchButton.style['display'] = 'none';
+            this.predownloadButton.style['display'] = 'none';
+
+            const module = this._state === 'game-pre-installation-available' ?
+                'Predownload' : 'PredownloadVoice';
+
+            import(`./states/${module}`).then((module) => {
+                module.default(this.launcher).then(() => {
+                    this.update().then(() => {
+                        this.launchButton.style['display'] = 'block';
+                    });
+                });
+            });
+        };
+
         this.update().then(() => {
             Neutralino.storage.setData('launcherLoaded', 'aboba');
 
@@ -73,6 +91,7 @@ export default class State
         this._state = state;
 
         this.launcher.progressBar!.hide();
+        this.predownloadButton.style['display'] = 'none';
 
         switch(state)
         {
@@ -81,6 +100,14 @@ export default class State
 
                 break;
 
+            case 'game-pre-installation-available':
+            case 'game-voice-pre-installation-available':
+                this.launchButton.textContent = 'Launch';
+
+                this.predownloadButton.style['display'] = 'block';
+
+                break;
+
             case 'game-installation-available':
                 this.launchButton.textContent = 'Install';
 
@@ -125,14 +152,14 @@ export default class State
             let state: LauncherState;
 
             const gameCurrent = await Game.current;
-            const gameLatest = (await Game.latest).version;
+            const gameLatest = await Game.getLatestData();
             const patch = await Patch.latest;
             const voiceData = await Voice.current;
 
             if (gameCurrent === null)
                 state = 'game-installation-available';
             
-            else if (gameCurrent != gameLatest)
+            else if (gameCurrent != gameLatest.game.latest.version)
                 state = 'game-update-available';
 
             // TODO: update this thing if the user selected another voice language
@@ -146,6 +173,12 @@ export default class State
                     'test-patch-available' : 'patch-available');
             }
 
+            else if (gameLatest.pre_download_game && !await Game.isUpdatePredownloaded())
+                state = 'game-pre-installation-available';
+
+            else if (gameLatest.pre_download_game && !await Voice.isUpdatePredownloaded(await Voice.selected))
+                state = 'game-voice-pre-installation-available';
+
             else state = 'game-launch-available';
 
             this.set(state);

src/ts/launcher/states/Launch.ts

@@ -5,6 +5,7 @@ import Notifications from '../../core/Notifications';
 import Runners from '../../core/Runners';
 import Game from '../../Game';
 import Process from '../../neutralino/Process';
+import Window from '../../neutralino/Window';
 
 declare const Neutralino;
 
@@ -32,6 +33,8 @@ export default (): Promise<void> => {
         // Otherwise run the game
         else
         {
+            Window.current.hide();
+
             /**
              * Selecting wine executable
              */
@@ -139,6 +142,8 @@ export default (): Promise<void> => {
             process.finish(() => {
                 const stopTime = Date.now();
 
+                Window.current.show();
+
                 // todo
 
                 resolve();

src/ts/launcher/states/Predownload.ts

@@ -0,0 +1,44 @@
+import type Launcher from '../../Launcher';
+
+import Game from '../../Game';
+import Prefix from '../../core/Prefix';
+
+export default (launcher: Launcher): Promise<void> => {
+    return new Promise(async (resolve) => {
+        Prefix.exists().then((exists) => {
+            if (!exists)
+            {
+                import('./CreatePrefix').then((module) => {
+                    module.default(launcher).then(() => updateGame());
+                });
+            }
+        });
+
+        const updateGame = async () => {
+            const prevGameVersion = await Game.current;
+
+            Game.predownloadUpdate(prevGameVersion).then((stream) => {
+                launcher.progressBar?.init({
+                    label: 'Downloading game...',
+                    showSpeed: true,
+                    showEta: true,
+                    showPercents: true,
+                    showTotals: true
+                });
+
+                stream?.start(() => launcher.progressBar?.show());
+    
+                stream?.progress((current: number, total: number, difference: number) => {
+                    launcher.progressBar?.update(current, total, difference);
+                });
+    
+                stream?.finish(() => {
+                    // Predownload voice package when the game itself has been downloaded
+                    import('./PredownloadVoice').then((module) => {
+                        module.default(launcher, prevGameVersion).then(() => resolve());
+                    });
+                });
+            });
+        };
+    });
+};

src/ts/launcher/states/PredownloadVoice.ts

@@ -0,0 +1,29 @@
+import type Launcher from '../../Launcher';
+
+import Voice from '../../Voice';
+
+export default (launcher: Launcher, prevGameVersion: string|null = null): Promise<void> => {
+    return new Promise(async (resolve) => {
+        Voice.predownloadUpdate(await Voice.selected, prevGameVersion).then((stream) => {
+            launcher.progressBar?.init({
+                label: 'Downloading voice package...',
+                showSpeed: true,
+                showEta: true,
+                showPercents: true,
+                showTotals: true
+            });
+
+            stream?.start(() => launcher.progressBar?.show());
+
+            stream?.progress((current: number, total: number, difference: number) => {
+                launcher.progressBar?.update(current, total, difference);
+            });
+
+            stream?.finish(() => {
+                launcher.progressBar?.hide();
+
+                resolve();
+            });
+        });
+    });
+};

src/ts/types/GameData.d.ts

@@ -52,12 +52,17 @@ type DeprecatedPackage = {
     md5: string;
 }
 
+type PreDownloadGame = {
+    latest: Latest;
+    diffs: Diff[];
+};
+
 type Data = {
     game: Game;
     plugin: Plugin;
     web_url: string;
     force_update?: any;
-    pre_download_game?: any;
+    pre_download_game?: PreDownloadGame;
     deprecated_packages: DeprecatedPackage[];
     sdk?: any;
 }

src/ts/types/Launcher.ts

@@ -19,6 +19,8 @@ type LauncherState =
     | 'game-installation-available'
     | 'game-update-available'
     | 'game-voice-update-required'
+    | 'game-pre-installation-available'
+    | 'game-voice-pre-installation-available'
     | 'game-launch-available';
 
 export type { LauncherState };