Break API calls in work towards moving all blocking io to ractors, dropped BackgroundWorker class

Gemfile.lock

@@ -1,13 +1,13 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    async (2.35.2)
+    async (2.36.0)
       console (~> 1.29)
       fiber-annotation
       io-event (~> 1.11)
       metrics (~> 0.12)
       traces (~> 0.18)
-    async-http (0.94.0)
+    async-http (0.94.2)
       async (>= 2.10.2)
       async-pool (~> 0.11)
       io-endpoint (~> 0.14)
@@ -30,7 +30,7 @@ GEM
       fiber-annotation
       fiber-local (~> 1.1)
       json
-    cyberarm_engine (0.25.0)
+    cyberarm_engine (0.25.1)
       gosu (~> 1.1)
     digest-crc (0.7.0)
       rake (>= 12.0.0, < 14.0.0)
@@ -43,7 +43,7 @@ GEM
     fiber-storage (1.0.1)
     fiddle (1.1.8)
     gosu (1.4.6)
-    io-endpoint (0.16.0)
+    io-endpoint (0.17.1)
     io-event (1.14.2)
     io-stream (0.11.1)
     ircparser (1.0.0)
@@ -52,8 +52,8 @@ GEM
       fiddle
     metrics (0.15.0)
     protocol-hpack (1.5.1)
-    protocol-http (0.58.0)
+    protocol-http (0.58.1)
-    protocol-http1 (0.36.0)
+    protocol-http1 (0.37.0)
       protocol-http (~> 0.58)
     protocol-http2 (0.24.0)
       protocol-hpack (~> 1.4)

docs/README.md

@@ -0,0 +1,35 @@
+# Documentation
+
+## File Formats
+
+Documentation and examples of file formats.
+
+### [Legacy Manifest](file_formats/LEGACY_MANIFEST.md)
+
+Blue Hell Productions `manifest.xml`. Still in use by W3D Hub.
+
+### [Megafest](file_formats/MEGAFEST.md)
+
+Prototype new thing `megafest.json`
+
+### [MIX](file_formats/MIX.md)
+
+Westwood archive format `<name>.mix`, `<name>.dat` and `<name>.pkg`
+
+### [W3D Hub Patch](file_formats/W3D_HUB_PATCH.md)
+
+Describes how to update a MIX archive from a package patch
+
+## Protocols
+
+### [LAN Discovery](protocols/LAN_DISCOVERY.md)
+
+How launchers and other applications discovery each other.
+
+### [Launcher Remote](protocols/LAUNCHER_REMOTE.md)
+
+Remotely control and get progress reports from the launcher
+
+### [LAN Package Share](protocols/LAN_PACKAGE_SHARE.md)
+
+Enable launchers on the same network to discover each other and share packages over LAN.

docs/file_formats/LEGACY_MANIFEST.md

@@ -0,0 +1,73 @@
+# Legacy Manifest
+
+In use since Blue Hell Productions
+
+> [!IMPORTANT]
+> References to packages exclude `.zip`
+
+Example `Full` manifest:
+
+```xml
+
+<BHP_Game_Manifest game="apb" version="0.9935.1.0" type="Full">
+    <Dependency name="msvc-2015.zip"/>
+    <Dependency name="directx-43.zip"/>
+    <File name="game.exe" checksum="C7AE972A2B9CF6EFCADE7919323F048F5CFAF2D40BD5A67D5A91F8D8A3759CA4" package="binaries"/>
+    <File name="MemoryManager.dll" checksum="B60A2B3F6A07D729EE5C2902CB9A6BEDAF55EEDB13F8514BAC0AD6F5D51DD0C2" package="binaries"/>
+    <File name="scripts.dll" checksum="76CAAEBF21E4D6A34C3ABDD474D59580DD1EAB097C9585A1FFC0E28FF0FCAF56" package="binaries"/>
+    <File name="Scripts2.dll" checksum="A0439B3BFE6CB497F402291548A312A9F43C0D38BDAF26C83E21DBD3F4D55702" package="binaries"/>
+    <File name="shared.dll" checksum="17A8797EC5F4C34E241681F4AF76EEA93856D6A1854EC9838B263AEC89CDF036" package="binaries"/>
+    <File name="ttle.dll" checksum="C005EB50D77675CE712B30A4402AB0D152D3993EB509E35AEDCB834CED54FADF" package="binaries"/>
+    <File name="ttversion.txt" checksum="17A9E627A03E20AC33849330468BF8A80B48449C9D473DF45F1052A160083167" package="misc"/>
+    <File name="Data/always.dat" checksum="D4D09149C7B5368AB3947AEC7B6E7781208F592FCA4390261F04A8E9C1887EB3" package="always"/>
+    <File name="Data/RA_Volcano.mix" checksum="4F3CB80BCF200659B3B4B167CCB64ECB36A3BA917681F4AB8027568EC187B88D" package="RA_Volcano"/>
+    <File name="Data/Movies/ea_ww.bik" checksum="065B8B0894CF9C1C09A940D26069C54A771EBB3092143BA37E97F8CA85B8CCAD" package="movies"/>
+    <File name="Data/Movies/R_Intro.BIK" checksum="0D9A2B2ABFD9680DF1C8D0F876DA4B60F015CA5C56EC6C0593528A3F88E2A58F" package="movies"/>
+</BHP_Game_Manifest>
+```
+
+Example `Patch` manifest:
+
+```xml
+
+<BHP_Game_Manifest game="apb" version="3.6.4.1" type="Patch" baseVersion="3.6.4.0">
+    <Dependency name="msvc-2022.zip"/>
+    <Dependency name="msvc-2015.zip" removedsince="3.6.4.1"/>
+    <File name="data/Always.dat" checksum="7B27D547E5A50401C9CA2851ACD4AC3F3CDA104F34650E1C32EB63A4120E3C90">
+        <Patch from="3.6.4.0" package="Always.patch.3.6.4.0"/>
+    </File>
+    <File name="data/Always_Emitters.dat" checksum="5C3EA8E5C4D7278F5EF1AF3CE1FC4F698C5A7D1FE7116DA0376A709E7CD3B2AE">
+        <Patch from="3.6.3.0" package="Always_Emitters.patch.3.6.3.0"/>
+    </File>
+    <File name="data/Always_Vehicles.dat" checksum="C6D4F6B3412C26065DE9B9F739BEC041B49FD613DB2686D8F231C2F692B263C5">
+        <Patch from="3.6.4.0" package="Always_Vehicles.patch.3.6.4.0"/>
+    </File>
+    <File name="data/RA_TestUnits.mix" removedsince="3.6.4.1"/>
+    <File name="data/RA_RidgeWar.mix" checksum="C3438C532C27F535CD958BEA9702160E952BC6CE58F9B43778F91DA23C6AE9FE" package="RA_RidgeWar"/>
+    <File name="data/RA_SwampOfIllusions.mix" checksum="A0787979664E5977A1949587382A3A84B9F1526F81934EBB7A3AC9334F9D4059">
+        <Patch from="3.6.4.0" package="RA_SwampOfIllusions.patch.3.6.4.0"/>
+    </File>
+</BHP_Game_Manifest>
+```
+
+## SPECIFICATION
+### BHP_GAME_MANIFEST (Root Element)
+* **GAME** - Unique Application ID
+* **VERSION** - Application Unique Version for Build
+* **TYPE** - Type of Build
+  * **Full** - Full Build
+  * **Patch** - Patch Build
+* **BASEVERSION** - *OPTIONAL* Version this build was based upon 
+
+### DEPENDENCY
+* **NAME** - Package name of dependency sans file extension
+* **REMOVEDSINCE** - _OPTIONAL_ No data. Not used anymore?
+
+### FILE
+* **NAME** - Name of file
+* **CHECKSUM** - _OPTIONAL_ SHA256 hash of file
+* **PACKAGE** - _OPTIONAL_ Package that contains this file. Not present on removed files or files that have been patched.
+* **REMOVEDSINCE** - _OPTIONAL_ Version this package was removed in. If present, only _NAME_ and _REMOVEDSINCE_ will be present.
+  * **PATCH**
+    * **FROM** - Version that the file last changed
+    * **PACKAGE** - Name of package that contains this file.

docs/file_formats/MEGAFEST.md

@@ -0,0 +1,319 @@
+> [!NOTE]
+> DRAFT
+
+# Megafest
+
+The fat manifest for W3D Hub Packager and Launcher(s), represented as a JSON hash.
+
+This **MEGAFEST** is intended to simplify patch generation and distribution by ensuring that
+all the data the Packager and Launcher(s) need can be found in a **single** manifest file.
+
+Speed up application packaging by only needing to scan and checksum the new builds files instead of needing
+to maintain a pristine copy of the previous version to be diffed against.
+
+Reduce the number of requests that the launcher(s) need to make to sort out how to download and
+patch the application.
+
+## Glossary
+
+### File
+
+An individual file on disk.
+
+An individual file as part of a MIX archive.
+
+### Package
+
+A collection of one or more files in a compressed archive for efficiently distributing the application.
+
+> [!NOTE]
+> Packages _MAY_ be compressed using ZSTANDARD (.zst) in the future. Do not assume all packages are zip files.
+>
+> Package names in the megafest include the file extension for this reason. 
+
+## Example `megafest.json` File
+
+```json
+{
+  "spec": 0,
+  "application": {
+    "id": "apb",
+    "version": "3.7.0.1",
+    "user_level": "public",
+    "previous_versions": [
+      "3.7.0.0"
+    ]
+  },
+  "dependencies": [
+    "msvc-2022"
+  ],
+  "packages": [
+    {
+      "name": "binaries.zip",
+      "version": "3.7.0.0",
+      "checksum": "SHA256-HASH",
+      "size": 4096,
+      "chunk_size": 4194304,
+      "chunk_checksums": [
+        "SHA256-HASH-A",
+        "SHA256-HASH-B"
+      ],
+      "files": [
+        {
+          "name": "game2.exe",
+          "checksum": "SHA256-HASH",
+          "size": 8691743
+        }
+      ]
+    },
+    {
+      "name": "data/Always.dat.zip",
+      "version": "3.7.0.0",
+      "checksum": "SHA256-HASH",
+      "size": 1355917483,
+      "chunk_size": 4194304,
+      "chunk_checksums": [
+        "SHA256-HASH-A",
+        "SHA256-HASH-B"
+      ],
+      "files": [
+        {
+          "name": "mp_wep_gdi.w3d",
+          "checksum": "CRC32-HASH",
+          "offset": 0,
+          "size": 8691743
+        }
+      ]
+    },
+    {
+      "name": "data/Always.patch.3.7.0.0.zst",
+      "version": "3.7.0.1",
+      "checksum": "SHA256-HASH",
+      "size": 1355919483,
+      "chunk_size": 4194304,
+      "chunk_checksums": [
+        "SHA256-HASH-A",
+        "SHA256-HASH-B"
+      ],
+      "from_version": "3.7.0.0",
+      "files": [
+        {
+          "name": "data/Always.patch",
+          "checksum": "SHA256-HASH",
+          "size": 8691743
+        }
+      ]
+    },
+    {
+      "name": "binaries.zip",
+      "version": "3.7.0.1",
+      "checksum": "SHA256-HASH",
+      "size": 4096,
+      "chunk_size": 4194304,
+      "chunk_checksums": [
+        "SHA256-HASH-A",
+        "SHA256-HASH-B"
+      ],
+      "files": [
+        {
+          "name": "game.exe",
+          "checksum": "SHA256-HASH",
+          "size": 8691743
+        }
+      ]
+    }
+  ],
+  "changes": [
+    {
+      "name": "game.exe",
+      "type": "added",
+      "package": "binaries"
+    },
+    {
+      "name": "game2.exe",
+      "type": "removed"
+    },
+    {
+      "name": "data/Always.dat",
+      "type": "updated",
+      "package": "Always.dat"
+    }
+  ],
+  "index": [
+    {
+      "name": "game.exe",
+      "checksum": "SHA256-HASH",
+      "size": 8691743
+    },
+    {
+      "name": "data/Always.dat",
+      "checksum": "SHA256-HASH",
+      "size": 1355917483
+    }
+  ]
+}
+```
+
+## SPECIFICATION
+
+### Application
+
+List of application details:
+
+* **ID** - Unique Application ID
+* **VERSION** - Application Unique Version
+* **USER_LEVEL** - User access level for this version
+* **PREVIOUS_VERSIONS** - Complete list of previous versions. Full builds only include _the_ previous version
+
+Example:
+
+```json
+{
+  "id": "apb",
+  "version": "3.7.0.1",
+  "user_level": "public",
+  "previous_versions": [
+    "3.7.0.0"
+  ]
+}
+```
+
+### Dependencies
+
+List of application's dependencies
+
+Example:
+
+```json
+[
+  "msvc-2022"
+]
+```
+
+### Packages
+
+Complete list of application's version tree of packages.
+
+That is, every package from the last full build to present for this version series.
+
+* **NAME** - Name of package
+* **VERSION** - Application version this package belongs to
+* **CHECKSUM** - SHA256 checksum of package
+* **SIZE** - File size of package in bytes
+* CHUNK **SIZE** - Size _CHUNK_CHECKSUMS_ represent in bytes
+* **CHUNK_CHECKSUMS** - Array of file chunk checksums
+* **FROM_VERSION** - *OPTIONAL* Version this file was last changed. Only present for MIX patches.
+* **FILES** - Array of files
+    * **NAME**
+    * **CHECKSUM** - SHA256 checksum of file.
+    * **SIZE** - File size in bytes
+
+Example:
+
+```json
+[
+  {
+    "name": "binaries",
+    "version": "3.7.0.0",
+    "checksum": "SHA256-HASH",
+    "size": 4096,
+    "chunk_size": 4194304,
+    "chunk_checksums": [
+      "SHA256-HASH-A",
+      "SHA256-HASH-B"
+    ],
+    "files": [
+      {
+        "name": "game.exe",
+        "checksum": "SHA256-HASH",
+        "size": 8691743
+      }
+    ]
+  },
+  {
+    "name": "data/Always.patch.3.7.0.0",
+    "version": "3.7.0.1",
+    "checksum": "SHA256-HASH",
+    "size": 2436543,
+    "chunk_size": 4194304,
+    "chunk_checksums": [
+      "SHA256-HASH-A",
+      "SHA256-HASH-B"
+    ],
+    "from_version": "3.7.0.0",
+    "files": [
+      {
+        "name": "data/Always.patch",
+        "checksum": "SHA256-HASH",
+        "size": 3636749
+      }
+    ]
+  }
+]
+```
+
+### Changes
+
+List of file changes in this build.
+
+* **NAME** - Name of file
+* **TYPE** - Type of change
+    * **ADDED** - New file has been added
+    * **UPDATED** - File has been changed
+    * **REMOVED** - File has been deleted
+* **PACKAGE** - _OPTIONAL_ Name of package, for this build version, the file can be found in
+
+```json
+[
+  {
+    "name": "game.exe",
+    "type": "updated",
+    "package": "binaries.zip"
+  },
+  {
+    "name": "game2.exe",
+    "type": "removed"
+  },
+  {
+    "name": "data/Always.dat",
+    "type": "added",
+    "package": "Always.dat.zip"
+  }
+]
+```
+
+### Index
+
+Complete list of files for this build with: filename, checksum, file size, and list of files for MIX archives.
+
+* **NAME** - File name
+* **CHECKSUM** - SHA256 hash of file
+* **SIZE** - File size
+* **FILES** - _OPTIONAL_ List of files inside of MIX archives
+  * **NAME** - File name
+  * **CHECKSUM** - CRC32 hash of file data
+  * **OFFSET** - Offset of file in MIX archive
+  * **SIZE** - Size of file data
+
+```json
+[
+  {
+    "name": "game.exe",
+    "checksum": "SHA256-HASH",
+    "size": 8691743
+  },
+  {
+    "name": "data/Always.dat",
+    "checksum": "SHA256-HASH",
+    "size": 570961432,
+    "files": [
+      {
+        "name": "mp_wep_gdi.w3d",
+        "checksum": "CRC32_HASH",
+        "offset": 0,
+        "size": 3524
+      }
+    ]
+  }
+]
+```

docs/file_formats/MIX.md

@@ -0,0 +1,132 @@
+# Westwood Renegade MIX Archive
+
+with W3D Hub / Tiberian Technologies alterations
+
+The .MIX archive file format is used by Renegade as _yes_.
+
+> [!IMPORTANT]
+> The MIX format has no notion about directories.
+>
+> Each file name **MUST** be unique.
+>
+> e.g. `data/map.dds` and `data/RA_Under/MAP.dds` have the same base file name
+> and therefore **MUST** raise an error when writing.
+
+> [!NOTE]
+> `io_pos` is the current position on the seek head of the open file
+
+## Reading
+
+* Read [Header](#header)
+    * validate MIME type (`MIX1` or `MIX2`)
+* Jump to io_pos `file_data_offset`
+* Read `file_count`
+* Read array of [`file_data`](#file-data-array)
+* Jump to io_pos `file_names_offset`
+* Read `file_count`
+* Read array of [`file_names`](#file-names-array)
+* Read file blobs
+    * For each file's [`file_data`](#file-data-array)
+        * Jump io_pos to `file_content_offset`
+        * Read `file_content_length`
+* Done.
+
+## Writing
+
+* Write MIME type (`MIX1` or `MIX2`)
+* Jump to io_pos `16`
+* Write file blobs
+    * **IMPORTANT:** Add `-io_pos & 7` padding to io_pos **AFTER** each file blob is written
+    * Save io_pos as `file_data_offset`
+* Write `file_count`
+    * Write array of [`file_data`](#file-data-array)
+    * Save io_pos as `file_names_offset`
+* Write `file_count`
+    * Write array of [`file_names`](#file-names-array)
+        * **IMPORTANT:** Ensure file names are null terminated and DO NOT exceed 254 (+ null byte) characters in length.
+* Jump to io_pos `4`
+    * Write [`file_data_offset`](#header)
+    * Write [`file_names_offset`](#header)
+    * Write [`reserved`](#header)
+* Done.
+
+## Pseudo Example:
+
+```yml
+header:
+  mime: MIX1 or MIX2
+  file_data_offset: 0x1024EAEA
+  file_names_offset: 0x8192EAEA
+  reserved: 0
+
+files:
+  array:
+    - file_blob
+
+file_data:
+  file_count: 0x000021
+  array:
+    file_name_crc32: 0xEFEFEFEF
+    file_content_offset: 0x3217DEAD
+    file_content_length: 0x0018BEEF
+
+file_names:
+  file_count: 0x000021
+  array:
+    file_name_length: 0xff
+    file_name: "mp_wep_gdi.w3d"
+```
+
+## MIME Types
+
+### MIX1 `0x3158494D`
+
+Westwood Farm Fresh Organic.
+
+### MIX2 `0x3258494D`
+
+Same as `MIX1`. `MIX2` hints to the engine's file reader to decrypt files before use.
+
+## Data Structures
+
+### Header
+
+| Name              | Offset | Type    | Description                                                         |
+|-------------------|--------|---------|---------------------------------------------------------------------|
+| MIME              | 0      | int32_t | 4 bytes representing `MIX1` (`0x3158494D)` or `MIX2` (`0x3258494D`) |
+| File Data Offset  | 4      | int32_t | Offset in MIX archive that [`file_data`](#file-data) data starts    |
+| File Names Offset | 8      | int32_t | Offset in MIX archive that [`file_name`](#file-names) data starts   |
+| RESERVED          | 12     | int32_t | Unused reserved int. Write as `0`                                   |
+
+### File
+
+| Name      | Offset  | Type                        | Description   |
+|-----------|---------|-----------------------------|---------------|
+| File Blob | complex | char[`file_content_length`] | File contents |
+
+### File Data
+
+| Name       | Offset             | Type    | Description                    |
+|------------|--------------------|---------|--------------------------------|
+| File Count | `file_data_offset` | int32_t | Number of files in MIX archive |
+
+### File Data Array
+
+| Name                | Offset                                     | Type     | Description                                            |
+|---------------------|--------------------------------------------|----------|--------------------------------------------------------|
+| File Name CRC32     | `file_data_offset` + 4 * (index * sizeof)  | uint32_t | CRC32 of **UPPERCASE** file name in network byte order |
+| File Content Offset | `file_data_offset` + 8 * (index * sizeof)  | uint32_t | File content offset                                    |
+| File Content Length | `file_data_offset` + 12 * (index * sizeof) | uint32_t | File content length                                    |
+
+### File Names
+
+| Name       | Offset              | Type    | Description                    |
+|------------|---------------------|---------|--------------------------------|
+| File Count | `file_names_offset` | int32_t | Number of files in MIX archive |
+
+### File Names Array
+
+| Name             | Offset  | Type                     | Description                                     |
+|------------------|---------|--------------------------|-------------------------------------------------|
+| File Name Length | complex | uint8_t                  | Length of string in bytes, including null byte. |
+| File Name        | complex | char[`file_name_length`] | null terminated string                          |

docs/file_formats/W3D_HUB_PATCH.md

@@ -0,0 +1,19 @@
+# W3D Hub Patch
+A W3D Hub Patch
+
+A `.w3dhub.patch` is included in MIX Patch files.
+It contains instructions for updating the target MIX.
+
+JSON file with a static CRC32 of `E6FE46B8`
+
+## Example:
+```json
+{
+  "removedFiles": [
+    "sov_v_mad.gif"
+  ],
+  "updatedFiles": [
+    "sov_v_mad.w3d"
+  ]
+}
+```

docs/protocols/LAN_DISCOVERY.md

@@ -0,0 +1,36 @@
+> [!NOTE]
+> DRAFT
+
+# LAN Discovery
+
+Doing things
+
+Broadcast port: 4898
+
+| Name              | Type     | Description                                                              |
+|-------------------|----------|--------------------------------------------------------------------------|
+| Version           | int32_t  | Version of protocol this application supports                            |
+| Owner             | string   | Nickname of application's active user                                    |
+| Hostname          | string   | Name of device                                                           |
+| UUID              | string   | Unique identifier for this application                                   |
+| Application       | string   | Name of application                                                      |
+| Features          | array    | Array of strings naming features the application supports                |
+| Service Port      | uint16_t | Dynamically assigned TCP port that interested parties should connect too |
+
+> [!NOTE]
+> Max packet size for UDP broadcast may need to be limited to 512 bytes
+
+```json
+{
+  "version": 0,
+  "owner": "cyberarm",
+  "hostname": "PC-1692",
+  "uuid": "019bcf1e-a22e-7fe0-a3db-3a9d37bfc6fa",
+  "application": "W3D Hub Linux Launcher",
+  "features": [
+    "launcher_remote:3",
+    "package_share:1"
+  ],
+  "service_port": 56802
+}
+```

docs/protocols/LAN_PACKAGE_SHARE.md

@@ -0,0 +1,9 @@
+> [!NOTE]
+> DRAFT
+
+# LAN Package Share
+
+Authentication is not required, only user opt-in to enable package sharing from their application.
+
+* List available packages
+* upload or download verified packages between other applications on LAN network

docs/protocols/LAUNCHER_REMOTE.md

@@ -0,0 +1,9 @@
+> [!NOTE]
+> DRAFT
+
+# Launcher Remote
+
+* Get list of available, installed, and in progress applications
+* Trigger download or update of application
+* Delete application
+* Join server

lib/api.rb

@@ -16,6 +16,7 @@ class W3DHub
     ].freeze
 
     def self.on_thread(method, *args, &callback)
+      raise "Renew."
       BackgroundWorker.foreground_job(-> { Api.send(method, *args) }, callback)
     end
 
@@ -60,15 +61,15 @@ class W3DHub
       end
 
       # Handle arbitrary urls that may come through
-      url = nil
       if path.start_with?("http")
         uri = URI(path)
+
         endpoint = uri.origin
         path = uri.request_uri
-      else
-        url = "#{endpoint}#{path}"
       end
 
+      url = "#{endpoint}#{path}"
+
       logger.debug(LOG_TAG) { "Fetching #{method.to_s.upcase} \"#{url}\"..." }
 
       # Inject Authorization header if account data is populated

lib/api/server_list_server.rb

@@ -20,8 +20,12 @@ class W3DHub
 
         @status  = Status.new(@data[:status])
 
-        @ping_interval = 30_000
+        # if we're on unix and using the PingManager then check every second since
+        # we're not _actually_ pinging the server.
+        @ping_interval = W3DHub.unix? ? 1_000 : 60_000
         @last_pinged = Gosu.milliseconds + @ping_interval + 1_000
+
+        Store.ping_manager.add_address(@address)
       end
 
       def update(hash)
@@ -49,6 +53,16 @@ class W3DHub
         if force_ping || Gosu.milliseconds - @last_pinged >= @ping_interval
           @last_pinged = Gosu.milliseconds
 
+          if W3DHub.unix?
+            average_ping = Store.ping_manager.ping_for(@address)
+
+            @ping = average_ping.negative? ? NO_OR_BAD_PING : average_ping
+
+            States::Interface.instance&.update_server_ping(self)
+          end
+
+          return unless W3DHub.windows?
+
           W3DHub::BackgroundWorker.foreground_parallel_job(
             lambda do
               W3DHub.command("ping #{@address} #{W3DHub.windows? ? '-n 3' : '-c 3'}") do |line|

lib/application_manager.rb

@@ -5,6 +5,7 @@ class W3DHub
 
     def initialize
       @tasks = [] # :installer, :importer, :repairer, :uninstaller
+      @running_applications = {}
     end
 
     def install(app_id, channel)
@@ -22,9 +23,7 @@ class W3DHub
       # unpack packages
       # install dependencies (e.g. visual C runtime)
 
-      installer = Installer.new(app_id, channel)
+      @tasks.push(Installer.new(context: task_context(app_id, channel, "version")))
-
-      @tasks.push(installer)
     end
 
     def update(app_id, channel)
@@ -32,7 +31,7 @@ class W3DHub
 
       return false unless installed?(app_id, channel)
 
-      updater = Updater.new(app_id, channel)
+      updater = Updater.new(Installer.new(context: task_context(app_id, channel, "version")))
 
       @tasks.push(updater)
     end
@@ -97,6 +96,18 @@ class W3DHub
       Process.spawn(exe)
     end
 
+    def task_context(app_id, channel, version)
+      Task::Context.new(
+        SecureRandom.hex,
+        "games",
+        app_id,
+        channel,
+        version,
+        "",
+        ""
+      )
+    end
+
     def repair(app_id, channel)
       logger.info(LOG_TAG) { "Repair Installation Request: #{app_id}-#{channel}" }
 
@@ -109,7 +120,7 @@ class W3DHub
       # unpack packages
       # install dependencies (e.g. visual C runtime) if appropriate
 
-      @tasks.push(Repairer.new(app_id, channel))
+      @tasks.push(Repairer.new(context: task_context(app_id, channel, "version")))
     end
 
     def uninstall(app_id, channel)
@@ -124,7 +135,7 @@ class W3DHub
         title: "Uninstall #{game.name}?",
         message: "Are you sure you want to uninstall #{game.name} (#{channel})?",
         accept_callback: proc {
-          @tasks.push(Uninstaller.new(app_id, channel))
+          @tasks.push(Uninstaller.new(context: task_context(app_id, channel, "version")))
         }
       )
     end
@@ -169,11 +180,17 @@ class W3DHub
     def wine_command(app_id, channel)
       return "" if W3DHub.windows?
 
-      if !Store.settings[:wine_prefix].to_s.empty?
+      "\"#{Store.settings[:wine_command]}\" "
-        "WINEPREFIX=\"#{Store.settings[:wine_prefix]}\" \"#{Store.settings[:wine_command]}\" "
-      else
-        "#{Store.settings[:wine_command]} "
     end
+
+    def wine_enviroment_variables(app_id, channel)
+      vars = {}
+      return vars if W3DHub.windows?
+
+      vars["WINEPREFIX"] = Store.settings[:wine_prefix] unless Store.settings[:wine_prefix].to_s.empty?
+      # vars["WINEDEBUG"] = "-all" if true # TODO make this an option. wine debug interferences with pid returned from Process.spawn
+
+      vars
     end
 
     def mangohud_command(app_id, channel)
@@ -188,6 +205,13 @@ class W3DHub
       end
     end
 
+    def mangohud_enviroment_variables(app_id, channel)
+      vars = {}
+      return vars if W3DHub.windows?
+
+      vars
+    end
+
     def dxvk_command(app_id, channel)
       return "" if W3DHub.windows?
 
@@ -201,6 +225,13 @@ class W3DHub
       end
     end
 
+    def dxvk_enviroment_variables(app_id, channel)
+      vars = {}
+      return vars if W3DHub.windows?
+
+      vars
+    end
+
     def start_command(path, exe)
       if W3DHub.windows?
         "start /D \"#{path}\" /B #{exe}"
@@ -212,17 +243,33 @@ class W3DHub
     def run(app_id, channel, *args)
       if (app_data = installed?(app_id, channel))
         install_directory = app_data[:install_directory]
-        exe_path = app_id == "ecw" ? "#{install_directory}/game500.exe" : "#{install_directory}/game.exe"
+        exe_path = app_id == "ecw" ? "#{install_directory}/game500.exe" : app_data[:install_path]
         exe_path.gsub!("/", "\\") if W3DHub.windows?
         exe_path.gsub!("\\", "/") if W3DHub.unix?
 
         exe = File.basename(exe_path)
         path = File.dirname(exe_path)
 
+        env = {}
+        if W3DHub.unix?
+          env.merge!(
+            dxvk_enviroment_variables(app_id, channel),
+            mangohud_enviroment_variables(app_id, channel),
+            wine_enviroment_variables(app_id, channel)
+          )
+        end
         attempted = false
         begin
-          pid = Process.spawn("#{dxvk_command(app_id, channel)}#{mangohud_command(app_id, channel)}#{wine_command(app_id, channel)}#{attempted ? start_command(path, exe) : "\"#{exe_path}\""} -launcher #{args.join(' ')}")
+          pid = Process.spawn(
+            env,
+            "#{dxvk_command(app_id, channel)}"\
+            "#{mangohud_command(app_id, channel)}"\
+            "#{wine_command(app_id, channel)}"\
+            "#{attempted ? start_command(path, exe) : "\"#{exe_path}\""} "\
+            "-launcher #{args.join(' ')}"
+          )
           Process.detach(pid)
+          BackgroundWorker.foreground_parallel_job(-> { monitor_process(app_id, channel, pid) }, ->(result) { handle_process_result(app_id, channel, result) })
         rescue Errno::EINVAL => e
           retryable = !attempted
           attempted = true
@@ -235,14 +282,53 @@ class W3DHub
       end
     end
 
+    def monitor_process(app_id, channel, pid)
+      key = "#{app_id}-#{channel}"
+      @running_applications[key] = pid
+
+      status = Process::Status.wait(pid)
+      pp [pid, status]
+
+      @running_applications.delete(key)
+
+      status
+    end
+
+    def handle_process_result(app_id, channel, status)
+      pp [app_id, channel, status]
+
+      # Everything's fine
+      return if status.pid >= 0 && status.success?
+
+      # Everything's not fine
+      reason = status.pid.positive? ? "Crashed" : "Failed to Launch"
+      game = Store.applications.games.find { |g| g.id == app_id }
+      title = "#{reason}: #{game.name}" if game
+      title = "Application #{reason}" unless game
+
+      message = if status.pid.negative?
+                  "Command Not Found."
+                else
+                  "Application crashed."
+                end
+
+      push_state(
+        States::MessageDialog,
+        title: title,
+        message: message,
+        accept_callback: proc {
+        }
+      )
+    end
+
     def join_server(app_id, channel, server, username = Store.settings[:server_list_username], password = nil, multi = false)
-      if installed?(app_id, channel) && username.to_s.length.positive?
+      return unless installed?(app_id, channel) && username.to_s.length.positive?
+
       run(
         app_id, channel,
         "+connect #{server.address}:#{server.port} +netplayername #{username}#{password ? " +password \"#{password}\"" : ""}#{multi ? " +multi" : ""}"
       )
     end
-    end
 
     def play_now_server(app_id, channel)
       app_data = installed?(app_id, channel)
@@ -255,13 +341,18 @@ class W3DHub
           !server.status.password &&
           server.status.player_count < server.status.max_players
       end
+      # sort by player count HIGH to LOW
+      # and by ping LOW to HIGH
+      server_options.sort! do |a, b|
+        [b.status.player_count, a.ping] <=> [a.status.player_count, b.ping]
+      end
 
       # try to find server with lowest ping and matching version
       found_server = server_options.find { |server| server.version == app_data[:installed_version] }
       # try to find server with lowest ping and undefined version
       found_server ||= server_options.find { |server| server.version == Api::ServerListServer::NO_OR_DEFAULT_VERSION }
 
-      found_server ? found_server : nil
+      found_server
     end
 
     def play_now(app_id, channel)
@@ -464,7 +555,7 @@ class W3DHub
     end
 
     def installing?(app_id, channel)
-      @tasks.find { |t| t.is_a?(Installer) && t.app_id == app_id && t.release_channel == channel }
+      @tasks.find { |t| t.is_a?(Installer) && t.context.app_id == app_id && t.context.channel_id == channel }
     end
 
     def updateable?(app_id, channel)
@@ -517,6 +608,54 @@ class W3DHub
       app.channels.detect { |g| g.id.to_s == channel_id.to_s }
     end
 
+    def handle_task_event(event)
+      # ONLY CALL on MAIN Ractor
+      raise "Something has gone horribly wrong!" unless Ractor.main?
+
+      pp event
+      task = @tasks.find { |t| t.context.task_id == event.task_id }
+      return unless task # FIXME: This is probably a fatal error
+
+      case event.type
+      when Task::EVENT_FAILURE
+        Store.main_thread_queue << proc do
+          window.push_state(
+            W3DHub::States::MessageDialog,
+            type: event.data[:type],
+            title: event.data[:title],
+            message: event.data[:message]
+          )
+        end
+        # FIXME: Send event to Games page to trigger refresh
+
+        States::Interface.instance&.hide_application_taskbar
+        @tasks.delete(task)
+
+      when Task::EVENT_START
+        States::Interface.instance&.show_application_taskbar
+
+      when Task::EVENT_SUCCESS
+        States::Interface.instance&.hide_application_taskbar
+        @tasks.delete(task)
+        # FIXME: Send event to Games page to trigger refresh
+      when Task::EVENT_STATUS
+        task.status = event.data
+        States::Interface.instance&.update_interface_task_status(task)
+
+      when Task::EVENT_STATUS_OPERATION
+        hash = event.data
+        operation = task.status.operations[operation[:id]]
+
+        if operation
+          operation.label = hash[:label]
+          operation.value = hash[:value]
+          operation.progress = hash[:progress]
+
+          States::Interface.instance&.update_interface_task_status(task)
+        end
+      end
+    end
+
     # No application tasks are being done
     def idle?
       !busy?
@@ -537,14 +676,36 @@ class W3DHub
       @tasks.delete_if { |t| t.state == :complete || t.state == :halted || t.state == :failed }
 
       task = @tasks.find { |t| t.state == :not_started }
-      task&.start
+
+      return unless task
+
+      # mark MAIN ractor's task as started before handing off to background ractor
+      # so that we don't start up multiple tasks at once.
+      task.start
+      on_ractor(task)
+    end
+
+    def on_ractor(task)
+      raise "Something has gone horribly wrong!!!" unless Ractor.main?
+
+      ractor = Ractor.new(task) do |t|
+        t.start
+      end
+
+      Thread.new do
+        while (message_event = ractor.take)
+          break unless message_event.is_a?(Task::MessageEvent)
+
+          Store.application_manager.handle_task_event(message_event)
+        end
+      end
     end
 
     def task?(type, app_id, channel)
       @tasks.find do |t|
         t.type == type &&
-        t.app_id == app_id &&
+          t.context.app_id == app_id &&
-        t.release_channel == channel &&
+          t.context.channel_id == channel &&
           [ :not_started, :running, :paused ].include?(t.state)
       end
     end

lib/application_manager/status.rb

@@ -1,10 +1,10 @@
 class W3DHub
   class ApplicationManager
     class Status
-      attr_reader :application, :channel, :step, :operations, :data
+      attr_reader :application, :channel, :operations, :data
-      attr_accessor :label, :value, :progress
+      attr_accessor :label, :value, :progress, :step
 
-      def initialize(application:, channel:, label: "", value: "", progress: 0.0, step: :pending, operations: {}, &callback)
+      def initialize(application:, channel:, label: "", value: "", progress: 0.0, step: :pending, operations: {})
         @application = application
         @channel = channel
 
@@ -15,17 +15,10 @@ class W3DHub
         @step = step
         @operations = operations
 
-        @callback = callback
 
         @data = {}
       end
 
-      def step=(sym)
-        @step = sym
-        @callback&.call(self)
-        @step
-      end
-
       class Operation
         attr_accessor :label, :value, :progress
 

lib/application_manager/tasks/installer.rb

@@ -8,9 +8,7 @@ class W3DHub
       end
 
       def execute_task
-        show_application_taskbar
+        fail_fast!
-
-        fail_fast
         return false if failed?
 
         fetch_manifests
@@ -46,9 +44,6 @@ class W3DHub
         mark_application_installed
         return false if failed?
 
-        sleep 1
-        hide_application_taskbar
-
         true
       end
     end

lib/background_worker.rb

@@ -1,166 +0,0 @@
-class W3DHub
-  class BackgroundWorker
-    LOG_TAG = "W3DHub::BackgroundWorker"
-    @@instance = nil
-    @@alive = false
-
-    def self.create
-      raise "BackgroundWorker instance already exists!" if @@instance
-      logger.info(LOG_TAG) { "Starting background job worker..." }
-
-
-      @@thread = Thread.current
-      @@alive = true
-      @@run = true
-      @@instance = self.new
-
-      @@instance.handle_jobs
-    end
-
-    def self.instance
-      @@instance
-    end
-
-    def self.run?
-      @@run
-    end
-
-    def self.alive?
-      @@alive
-    end
-
-    def self.busy?
-      instance&.busy?
-    end
-
-    def self.shutdown!
-      @@run = false
-    end
-
-    def self.kill!
-      @@thread.kill
-
-      @@instance.kill!
-    end
-
-    def self.job(job, callback, error_handler = nil, data = nil)
-      @@instance.add_job(Job.new(job: job, callback: callback, error_handler: error_handler, data: data))
-    end
-
-    def self.parallel_job(job, callback, error_handler = nil, data = nil)
-      @@instance.add_parallel_job(Job.new(job: job, callback: callback, error_handler: error_handler, data: data))
-    end
-
-    def self.foreground_job(job, callback, error_handler = nil, data = nil)
-      @@instance.add_job(Job.new(job: job, callback: callback, error_handler: error_handler, deliver_to_queue: true, data: data))
-    end
-
-    def self.foreground_parallel_job(job, callback, error_handler = nil, data = nil)
-      @@instance.add_parallel_job(Job.new(job: job, callback: callback, error_handler: error_handler, deliver_to_queue: true, data: data))
-    end
-
-    def initialize
-      @busy = false
-      @jobs = []
-
-      # Jobs which are order independent
-      @parallel_busy = false
-      @thread_pool = []
-      @parallel_jobs = []
-    end
-
-    def kill!
-      @thread_pool.each(&:kill)
-
-      logger.info(LOG_TAG) { "Forcefully killed background job worker." }
-      @@alive = false
-    end
-
-    def handle_jobs
-      8.times do |i|
-        Thread.new do
-          @thread_pool << Thread.current
-
-          while BackgroundWorker.run?
-            job = @parallel_jobs.shift
-
-            @parallel_busy = true
-
-            begin
-              job&.do
-            rescue => e
-              job&.raise_error(e)
-            end
-
-            @parallel_busy = !@parallel_jobs.empty?
-
-            sleep 0.1
-          end
-        end
-      end
-
-      Thread.new do
-        @thread_pool << Thread.current
-
-        while BackgroundWorker.run?
-          job = @jobs.shift
-
-          @busy = true
-
-          begin
-            job&.do
-          rescue => e
-            job&.raise_error(e)
-          end
-
-          @busy = !@jobs.empty?
-
-          sleep 0.1
-        end
-
-        logger.info(LOG_TAG) { "Stopped background job worker." }
-        @@alive = false
-      end
-    end
-
-    def add_job(job)
-      @jobs << job
-    end
-
-    def add_parallel_job(job)
-      @parallel_jobs << job
-    end
-
-    def busy?
-      @busy || @parallel_busy
-    end
-
-    class Job
-      def initialize(job:, callback:, error_handler: nil, deliver_to_queue: false, data: nil)
-        @job = job
-        @callback = callback
-        @error_handler = error_handler
-        @deliver_to_queue = deliver_to_queue
-        @data = data
-      end
-
-      def do
-        result = @data ? @job.call(@data) : @job.call
-        deliver(result)
-      end
-
-      def deliver(result)
-        if @deliver_to_queue
-          Store.main_thread_queue << -> { @callback.call(result) }
-        else
-          @callback.call(result)
-        end
-      end
-
-      def raise_error(error)
-        logger.error error
-        @error_handler&.call(error)
-      end
-    end
-  end
-end

lib/cache.rb

@@ -90,8 +90,6 @@ class W3DHub
           result = true
         end
 
-        binding.irb unless response
-
         if response&.status == 200 || response&.status == 206
           result = true
         else

lib/common.rb

@@ -1,4 +1,8 @@
 class W3DHub
+  PLATFORM_WINDOWS = RbConfig::CONFIG["host_os"] =~ /(mingw|mswin|windows)/i
+  PLATFORM_DARWIN = RbConfig::CONFIG["host_os"] =~ /(darwin|mac os)/i
+  PLATFORM_LINUX = RbConfig::CONFIG["host_os"] =~ /(linux|bsd|aix|solaris)/i
+
   def self.format_size(bytes)
     case bytes
     when 0..1023 # Bytes
@@ -17,15 +21,15 @@ class W3DHub
   end
 
   def self.windows?
-    RbConfig::CONFIG["host_os"] =~ /(mingw|mswin|windows)/i
+    PLATFORM_WINDOWS
   end
 
   def self.mac?
-    RbConfig::CONFIG["host_os"] =~ /(darwin|mac os)/i
+    PLATFORM_DARWIN
   end
 
   def self.linux?
-    RbConfig::CONFIG["host_os"] =~ /(linux|bsd|aix|solaris)/i
+    PLATFORM_LINUX
   end
 
   def self.unix?

lib/network_manager.rb

@@ -0,0 +1,96 @@
+class W3DHub
+  # all http(s) requests for API calls and downloading images run through here
+  class NetworkManager
+    NetworkEvent = Data.define(:context, :result)
+    Request = Struct.new(:context, :callback)
+    Context = Data.define(
+      :request_id,
+      :url,
+      :headers,
+      :body,
+      :bearer_token
+    )
+
+    def initialize
+      @requests = {}
+
+      @ractor = Ractor.new do
+        raise "Something has gone quite wrong!" if Ractor.main?
+
+        queue = []
+        api_client = ApiClient.new
+
+        # Ractor has no concept of non-blocking send/receive... :cry:
+        Thread.new do
+          while (context = Ractor.receive) # blocking
+            # we cannot (easily) ensure we always are receive expected data
+            next unless context.is_a?(Context)
+
+            queue << context
+          end
+        end
+
+        Async do
+          loop do
+            context = queue.shift
+
+            # goto sleep for an instant if there is no work to be doing
+            unless context
+              sleep 0.1
+              next
+            end
+
+            Sync do
+              result = api_client.handle(context)
+
+              Ractor.yield(NetworkEvent.new(context, result))
+            end
+          end
+        end
+      end
+
+      monitor
+    end
+
+    def add_request(url, headers, body, bearer_token, &block)
+      request_id = SecureRandom.hex
+
+      @requests << Request.new(
+        Context.new(
+          request_id,
+          url,
+          headers,
+          body,
+          bearer_token
+        ),
+        block
+      )
+
+      @ractor.send(context)
+
+      request_id
+    end
+
+    def monitor
+      raise "Something has gone quite wrong!!!" unless Ractor.main?
+
+      # Thread that spends its days sleeping **yawn**
+      Thread.new do
+        while (event = @ractor.take)
+          pp event
+
+          next unless event.is_a?(NetworkEvent)
+
+          request = @request.find { |r| r.context.request_id == event.context.request_id }
+
+          next if request
+
+          @requests.delete(request)
+          result = event.result
+
+          Store.main_thread_queue << ->(result) { request.callback(result) }
+        end
+      end
+    end
+  end
+end

lib/network_manager/api_client.rb

@@ -0,0 +1,9 @@
+class W3DHub
+  class NetworkManager
+    # Api reimplemented in a Ractor friendly manner
+    class ApiClient
+      def initialize
+      end
+    end
+  end
+end

lib/pages/server_browser.rb

@@ -196,13 +196,13 @@ class W3DHub
 
       def ping_icon(server)
         case server.ping
-        when 0..150
+        when 0..50
           @ping_icons[:good]
-        when 151..200
+        when 51..150
           @ping_icons[:fair]
-        when 201..1_000
+        when 151..200
           @ping_icons[:poor]
-        when 1_001..5_000
+        when 201..1_000
           @ping_icons[:bad]
         else
           @ping_icons[:unknown]

lib/ping.rb

@@ -0,0 +1,166 @@
+require "async"
+require "socket"
+require "securerandom"
+
+class W3DHub
+  class Ping
+    ICMPHeader = Data.define(:type, :code, :checksum, :_ping_id, :_sequence_id, :data)
+    EchoRequest = Struct.new(:ping_id, :sequence_id, :data, :time, :timed_out)
+
+    ICMP_ECHOREPLY = 0
+    ICMP_ECHO      = 8
+    ICMP_SUBCODE   = 0
+
+    BIT_PACKER = "C2 n3 A*".freeze
+    MINIMUM_INTERVAL = 250 # ms # intervals below 200ms are considered rude and may be dropped due to flooding.
+    ECHO_REQUEST_HISTORY = 30 # 100 # keep the last n requests
+
+    attr_reader :address
+
+    def initialize(address:, count: 10, ttl: 120, interval: 1_000, data: nil)
+      @address = address
+      @count = count
+      @ttl = ttl
+      @interval = interval.to_i < MINIMUM_INTERVAL ? MINIMUM_INTERVAL : interval # ms
+      @data = data
+
+      # circular buffer
+      @echo_requests = Array.new(ECHO_REQUEST_HISTORY) { EchoRequest.new(-1, -1, "", nil, false) }
+      @echo_requests_index = 0
+
+      # NOTE: The PING_ID _might_ be overruled by the kernel and should not be used
+      #       to check that any received echo replies are ours.
+      #
+      #       Sequence ID and Data appear to be unmodified.
+      @ping_id = SecureRandom.hex.to_i(16) & 0xffff
+      @sequence_id = SecureRandom.hex.to_i(16) & 0xffff
+
+      addresses = Addrinfo.getaddrinfo(@address, nil, Socket::AF_INET, :DGRAM)
+      raise "NO ADDRESSES!" if addresses.empty?
+
+      @socket_address = addresses.sample.to_sockaddr
+
+      @socket = Socket.new(Socket::AF_INET, Socket::SOCK_DGRAM, Socket::IPPROTO_ICMP)
+      @socket.setsockopt(Socket::SOL_SOCKET, Socket::IP_TTL, @ttl)
+    end
+
+    # Perform a checksum on the message.  This is the sum of all the short
+    # words and it folds the high order bits into the low order bits.
+    def message_checksum(message)
+      length    = message.length
+      num_short = length / 2
+      check     = 0
+
+      message.unpack("n#{num_short}").each do |short|
+        check += short
+      end
+
+      check += message[length - 1, 1].unpack1("C") << 8 if (length % 2).positive?
+
+      check = (check >> 16) + (check & 0xffff)
+      ~((check >> 16) + check) & 0xffff
+    end
+
+    def random_data
+      SecureRandom.hex
+    end
+
+    def monotonic_time
+      Process.clock_gettime(:CLOCK_MONOTONIC, :millisecond)
+    end
+
+    def verified?(message)
+      data = message.unpack(BIT_PACKER)
+      checksum = data[2]
+
+      # set checksum in message to 0
+      data[2] = 0
+
+      checksum == message_checksum(data.pack(BIT_PACKER))
+    end
+
+    def request_complete?(request)
+      request.timed_out || !request.time.nil?
+    end
+
+    def packet_loss
+      completed_requests = @echo_requests.select { |r| request_complete?(r) }
+      failed_requests = completed_requests.select(&:timed_out)
+
+      # 0% packet loss 😎
+      return 0.0 if failed_requests.empty?
+
+      # 100% packet loss
+      return 1.0 if failed_requests.size == completed_requests.size
+
+      failed_requests.size / completed_requests.size.to_f
+    end
+
+    def average_ping
+      times = @echo_requests.select { |r| request_complete?(r) && !r.timed_out }.map(&:time)
+
+      return -1 unless times.size.positive?
+
+      times.sum.to_f / times.size
+    end
+
+    # returns true if any echo requests have completed (reply received or timed out) and packet loss is less than 30%
+    def okay?
+      completed_requests = @echo_requests.select { |r| request_complete?(r) }.size
+
+      completed_requests.positive? && packet_loss < 0.3
+    end
+
+    def ping(count = @count)
+      return if count <= 0
+
+      Async do |task|
+        @count.times do
+          task.Async do |subtask|
+            @sequence_id = (@sequence_id + 1) % 0xffff
+            data = @data || random_data
+
+            checksum = 0
+            message = [ICMP_ECHO, ICMP_SUBCODE, checksum, @ping_id, @sequence_id, data].pack(BIT_PACKER)
+            checksum = message_checksum(message)
+            message = [ICMP_ECHO, ICMP_SUBCODE, checksum, @ping_id, @sequence_id, data].pack(BIT_PACKER)
+
+            @socket.send(message, 0, @socket_address)
+
+            s = monotonic_time
+            request = @echo_requests[@echo_requests_index]
+            request.ping_id = @ping_id
+            request.sequence_id = @sequence_id
+            request.data = data
+            request.time = nil
+            request.timed_out = false
+            @echo_requests_index = (@echo_requests_index + 1) % ECHO_REQUEST_HISTORY
+
+            subtask.with_timeout(2) do
+              loop do
+                data, _addrinfo = @socket.recvfrom(1500)
+
+                # ignore corruption
+                next unless verified?(data)
+
+                header = ICMPHeader.new(*data.unpack(BIT_PACKER))
+
+                if header.type == ICMP_ECHOREPLY && header._sequence_id == request.sequence_id && header.data == request.data
+                  duration = monotonic_time - s
+                  request.time = duration
+
+                  break
+                end
+              end
+            rescue Async::TimeoutError
+              request.timed_out = true
+            end
+          end
+
+          # Don't send out pings in a flood, it's considered rude.
+          sleep @interval / 1000.0
+        end
+      end
+    end
+  end
+end

lib/ping_manager.rb

@@ -0,0 +1,54 @@
+class W3DHub
+  class PingManager
+    Container = Struct.new(:pinger, :last_ping_time_ms)
+    PING_INTERVAL = 60_000
+
+    def initialize
+      @containers = {}
+      @addresses = []
+    end
+
+    def monitor(task)
+      task.async do |subtask|
+        while BackgroundWorker.alive?
+          # activate new addresses
+          @addresses.each do |address|
+            @containers[address] ||= Container.new(Ping.new(address: address), -PING_INTERVAL * 2)
+          end
+
+          # cleanup old addresses
+          @containers.each_key do |key|
+            @containers.delete(key) unless @addresses.find { |a| a == key }
+          end
+
+          # ping the pingers
+          @containers.each_value do |container|
+            next unless Gosu.milliseconds - container.last_ping_time_ms >= PING_INTERVAL
+
+            container.last_ping_time_ms = Gosu.milliseconds
+
+            subtask.async do
+              container.pinger.ping
+              # pp [container.pinger.address, container.pinger.average_ping]
+            end
+          end
+
+          sleep 0.001
+        end
+      end
+    end
+
+    def add_address(address)
+      @addresses << address
+      @addresses.uniq!
+    end
+
+    def ping_for(address)
+      @containers[address]&.pinger&.average_ping&.round || -1
+    end
+
+    def remove_address(address)
+      @addresses.delete(address)
+    end
+  end
+end

lib/window.rb

@@ -6,7 +6,12 @@ class W3DHub
 
       Store[:server_list] = []
       Store[:settings] = Settings.new
+      Store[:network_manager] = NetworkManager.new
       Store[:application_manager] = ApplicationManager.new
+      Store[:ping_manager] = PingManager.new
+
+      # FIXME
+      # BackgroundWorker.parallel_job(-> { Async { |task| Store.ping_manager.monitor(task) } }, nil)
 
       Store[:main_thread_queue] = []
 
@@ -31,9 +36,6 @@ class W3DHub
       while (block = Store.main_thread_queue.shift)
         block&.call
       end
-
-      # Manually sleep main thread so that the BackgroundWorker thread can be scheduled
-      sleep(update_interval / 1000.0) if W3DHub::BackgroundWorker.busy? || Store.application_manager.busy?
     end
 
     def needs_redraw?

w3d_hub_linux_launcher.rb

@@ -106,11 +106,14 @@ require_relative "lib/cache"
 require_relative "lib/settings"
 require_relative "lib/ww_mix"
 require_relative "lib/ico"
+require_relative "lib/ping"
+require_relative "lib/ping_manager"
 require_relative "lib/broadcast_server"
 require_relative "lib/hardware_survey"
 require_relative "lib/game_settings"
 require_relative "lib/websocket_client"
-require_relative "lib/background_worker"
+require_relative "lib/network_manager"
+require_relative "lib/network_manager/api_client"
 require_relative "lib/application_manager"
 require_relative "lib/application_manager/manifest"
 require_relative "lib/application_manager/status"
@@ -176,27 +179,18 @@ end
 
 logger.info(W3DHub::LOG_TAG) { "W3D Hub Linux Launcher v#{W3DHub::VERSION}" }
 
-Thread.new do
-  W3DHub::BackgroundWorker.create
-end
-
-until W3DHub::BackgroundWorker.alive?
-  sleep 0.1
-end
-
 logger.info(W3DHub::LOG_TAG) { "Launching window..." }
 # W3DHub::Window.new(width: 980, height: 720, borderless: false, resizable: true).show unless defined?(Ocra)
 W3DHub::Window.new(width: 1280, height: 800, borderless: false, resizable: true).show unless defined?(Ocra)
 # W3DHub::Window.new(width: 1920, height: 1080, borderless: false, resizable: true).show unless defined?(Ocra)
-W3DHub::BackgroundWorker.shutdown!
 
-worker_soft_halt = Gosu.milliseconds
+# worker_soft_halt = Gosu.milliseconds
 
-# Wait for BackgroundWorker to return
+# # Wait for BackgroundWorker to return
-while W3DHub::BackgroundWorker.alive?
+# while W3DHub::BackgroundWorker.alive?
-  W3DHub::BackgroundWorker.kill! if Gosu.milliseconds - worker_soft_halt >= 1_000
+#   W3DHub::BackgroundWorker.kill! if Gosu.milliseconds - worker_soft_halt >= 1_000
 
-  sleep 0.1
+#   sleep 0.1
-end
+# end
 
 W3DHub::LOGGER&.close