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Foster Hangdaan 2024-05-29 21:12:40 -04:00
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# EditorConfig helps maintain consistent coding styles for multiple developers
# working on the same project across various editors and IDEs.
#
# https://editorconfig.org
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dist/* filter=lfs diff=lfs merge=lfs -text

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# Common
.DS_Store
.idea
*.log
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.env.local
.env.*.local
# Compilation and build artifacts
dist/
target/
# Emacs
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# GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc.
<https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
## Preamble
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### 7. Additional Terms.
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### 8. Termination.
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However, if you cease all violation of this License, then your license
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Moreover, your license from a particular copyright holder is
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### 9. Acceptance Not Required for Having Copies.
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### 10. Automatic Licensing of Downstream Recipients.
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### 11. Patents.
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If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients. "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within the
scope of its coverage, prohibits the exercise of, or is conditioned on
the non-exercise of one or more of the rights that are specifically
granted under this License. You may not convey a covered work if you
are a party to an arrangement with a third party that is in the
business of distributing software, under which you make payment to the
third party based on the extent of your activity of conveying the
work, and under which the third party grants, to any of the parties
who would receive the covered work from you, a discriminatory patent
license (a) in connection with copies of the covered work conveyed by
you (or copies made from those copies), or (b) primarily for and in
connection with specific products or compilations that contain the
covered work, unless you entered into that arrangement, or that patent
license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
### 12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under
this License and any other pertinent obligations, then as a
consequence you may not convey it at all. For example, if you agree to
terms that obligate you to collect a royalty for further conveying
from those to whom you convey the Program, the only way you could
satisfy both those terms and this License would be to refrain entirely
from conveying the Program.
### 13. Remote Network Interaction; Use with the GNU General Public License.
Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your
version supports such interaction) an opportunity to receive the
Corresponding Source of your version by providing access to the
Corresponding Source from a network server at no charge, through some
standard or customary means of facilitating copying of software. This
Corresponding Source shall include the Corresponding Source for any
work covered by version 3 of the GNU General Public License that is
incorporated pursuant to the following paragraph.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the work with which it is combined will remain governed by version
3 of the GNU General Public License.
### 14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions
of the GNU Affero General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies that a certain numbered version of the GNU Affero General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU Affero General Public License, you may choose any version ever
published by the Free Software Foundation.
If the Program specifies that a proxy can decide which future versions
of the GNU Affero General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
### 15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
### 16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
### 17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
## How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.
To do so, attach the following notices to the program. It is safest to
attach them to the start of each source file to most effectively state
the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper
mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for
the specific requirements.
You should also get your employer (if you work as a programmer) or
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. For more information on this, and how to apply and follow
the GNU AGPL, see <https://www.gnu.org/licenses/>.

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#+title: Vimm DL
#+author: Foster Hangdaan
#+email: foster@hangdaan.email
* About
[[https://code.fosterhangdaan.com/foster/vimm-dl][Vimm DL]] is a secure command-line tool for automating game downloads from [[https://vimm.net/vault][Vimm's Vault]].
* Documentation
Refer to the [[https://code.fosterhangdaan.com/foster/vimm-dl/wiki][wiki]] for instructions and documentation.
* Core Maintainers
An up-to-date list of maintainers and their contact information is available in the [[https://code.fosterhangdaan.com/foster/vimm-dl/wiki/maintainers][Maintainers]] page of the wiki.
* License
#+attr_html: :width 200px
[[https://static.fosterhangdaan.com/images/agplv3-logo.svg]]
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
* Copyright
Copyright \copy 2024 Foster Hangdaan

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{
"name": "vimm-dl",
"version": "0.1.0",
"imports": {
"/": "./",
"./": "./",
"cliffy/": "https://deno.land/x/cliffy@v1.0.0-rc.4/"
},
"tasks": {
"check": "deno fmt --check && deno lint && deno check **/*.ts",
"compile": "deno task compile:x86_64-linux && deno task compile:x86_64-apple && deno task compile:aarch64-linux && deno task compile:aarch64-apple && deno task compile:windows",
"compile:aarch64-apple": "deno compile --allow-net=vimm.net,download2.vimm.net,download3.vimm.net --target aarch64-apple-darwin --output target/aarch64-apple-darwin/vimm-dl main.ts",
"compile:aarch64-linux": "deno compile --allow-net=vimm.net,download2.vimm.net,download3.vimm.net --target aarch64-unknown-linux-gnu --output target/aarch64-unknown-linux-gnu/vimm-dl main.ts",
"compile:x86_64-apple": "deno compile --allow-net=vimm.net,download2.vimm.net,download3.vimm.net --target x86_64-apple-darwin --output target/x86_64-apple-darwin/vimm-dl main.ts",
"compile:x86_64-linux": "deno compile --allow-net=vimm.net,download2.vimm.net,download3.vimm.net --target x86_64-unknown-linux-gnu --output target/x86_64-unknown-linux-gnu/vimm-dl main.ts",
"compile:windows": "deno compile --allow-net=vimm.net,download2.vimm.net,download3.vimm.net --target x86_64-pc-windows-msvc --output target/x86_64-pc-windows-msvc/vimm-dl main.ts"
},
"fmt": {
"exclude": [
"LICENSE.md"
]
}
}

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/**
* @file Program entry point.
* @author Foster Hangdaan <foster@hangdaan.email>
* @copyright 2024 Foster Hangdaan
* @license AGPL-3.0-or-later
*
* Vimm DL - Automated game downloader for https://vimm.net/vault.
* Copyright (C) 2024 Foster Hangdaan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { ValidationError } from "cliffy/command/mod.ts";
import command from "/src/command.ts";
try {
await command.parse(Deno.args);
} catch (error) {
if (error instanceof ValidationError) {
error.cmd?.showHelp();
Deno.exit(error.exitCode);
} else {
console.error("%s", error);
Deno.exit(1);
}
}

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{
"amp": "&",
"lpar": "(",
"rpar": ")"
}

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/**
* @file Defines the main command.
* @author Foster Hangdaan <foster@hangdaan.email>
* @copyright 2024 Foster Hangdaan
* @license AGPL-3.0-or-later
*
* Vimm DL - Automated game downloader for https://vimm.net/vault.
* Copyright (C) 2024 Foster Hangdaan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { Confirm } from "cliffy/prompt/mod.ts";
import Game from "/src/game.ts";
import VaultPage from "/src/vault-page.ts";
import { bytesToString, dedup, parseBytes } from "/src/utils.ts";
import { tty } from "cliffy/ansi/tty.ts";
import { colors } from "cliffy/ansi/colors.ts";
import denoConfig from "/deno.json" with { type: "json" };
import {
downloadListTable,
downloadTotalsTable,
errorsTable,
} from "/src/tables.ts";
import {
Command,
CompletionsCommand,
ValidationError,
} from "cliffy/command/mod.ts";
const command = new Command()
.name(denoConfig.name)
.version(denoConfig.version)
.description(
"A secure command-line tool for automating game downloads from Vimm's Vault <https://vimm.net/vault>.",
)
.meta("License", "GNU Affero General Public License (version 3 or later)")
.meta("Repository", "https://code.fosterhangdaan.com/foster/vimm-dl")
.meta("Documentation", "https://code.fosterhangdaan.com/foster/vimm-dl/wiki")
.meta("Bug Reports", "https://code.fosterhangdaan.com/foster/vimm-dl/issues")
.example(
"Supply URLs on the command-line",
`${
colors.magenta(
denoConfig.name +
" https://vimm.net/vault/5953 https://vimm.net/vault/5359 --destination ~/Downloads",
)
}\nDownloads two games to ~/Downloads.`,
)
.example(
"Supply URLs from a file",
`${
colors.magenta(
denoConfig.name + " --file=./urls.txt --destination ~/Downloads",
)
}\nReads from a text file containing a newline-separated list of URLs.\nAny URLs supplied on the command-line will be ignored.`,
)
.arguments("[urls...]")
.option(
"-d, --destination <path:file>",
"The directory where the downloads will be saved.",
{
required: true,
},
)
.option(
"-f, --file <path:file>",
`The path to a text file containing a newline-separated list of URLs. If provided, ${
colors.magenta(denoConfig.name)
} will read the URLs from this file instead of the ones on the command line.`,
)
.option(
"-y, --yes",
"Assume 'yes' to all prompts not related to permissions.",
{
default: false,
},
)
.action(async (options, ...args) => {
// Ask for write permission to destination directory.
const allowWriteToDestination = await Deno.permissions.request({
name: "write",
path: options.destination,
});
if (allowWriteToDestination.state !== "granted") {
Deno.exit(1);
}
let vaultPages: VaultPage[];
if (options.file) {
// Ask for read permission to input file.
const allowReadFile = await Deno.permissions.request({
name: "read",
path: options.file,
});
if (allowReadFile.state !== "granted") {
Deno.exit(1);
}
const decoder = new TextDecoder("utf-8");
const data = await Deno.readFile(options.file);
const dataDecoded = decoder.decode(data);
vaultPages = dedup(dataDecoded.split("\n"))
.filter((u) => !!u)
.map((u) => new VaultPage(u));
} else {
vaultPages = dedup(args).map((u) => new VaultPage(u));
}
if (vaultPages.length <= 0) {
throw new ValidationError("Provide at least one URL.");
}
console.log("Fetching game information...");
const games: Game[] = await Promise.all(vaultPages.map((page) => {
return page.fetchGame();
}));
const gamesSortedByTitle = games.sort((a, b) => {
if (a.title < b.title) {
return -1;
} else if (a.title > b.title) {
return 1;
} else {
return 0;
}
});
const totalDownloadSizeInBytes = gamesSortedByTitle.reduce((acc, val) => {
const bytes = parseBytes(val.downloadSize) || 0;
return acc + bytes;
}, 0);
// Render the downloads list table.
console.log("");
downloadListTable.body(gamesSortedByTitle.map((g) => [
g.title,
g.vaultID,
g.platform,
g.regions.join(","),
g.downloadSize,
])).render();
// Render the download totals table.
console.log("");
downloadTotalsTable[0][1] = gamesSortedByTitle.length;
downloadTotalsTable[1][1] = bytesToString(totalDownloadSizeInBytes, 2);
downloadTotalsTable.render();
console.log("");
// Ask for confirmaton before proceeding if the `--yes` option was not provided.
if (!options.yes) {
const proceed = await Confirm.prompt("Proceed with download?");
if (!proceed) {
Deno.exit(1);
}
}
for (const game of gamesSortedByTitle) {
try {
console.log("");
await game.download(options.destination, (filename, fileSize) => {
let bytesDownloaded = 0;
let currentProgress = 0;
return new TransformStream({
transform(chunk, controller) {
bytesDownloaded += chunk.byteLength;
const progress = Math.floor((bytesDownloaded / fileSize) * 100);
// Only update the progress if it has changed.
if (currentProgress !== progress) {
currentProgress = progress;
tty.eraseLine();
tty
.cursorTo(0)
.text(currentProgress + "%")
.cursorTo(6)
.text(filename);
}
controller.enqueue(chunk);
},
});
});
} catch (err) {
tty.eraseLine();
tty.cursorTo(0).text(
colors.red(
`An error has occured while downloading ${game.title}. Download aborted.`,
),
);
errorsTable.push([game.title, err.message]);
}
}
if (errorsTable.length > 0) {
console.log("\n");
console.log(colors.red("Errors occured during download:\n"));
errorsTable.render();
Deno.exit(1);
}
})
.command("completions", new CompletionsCommand());
export default command;

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/**
* @file Houses the `Game` class.
* @author Foster Hangdaan <foster@hangdaan.email>
* @copyright 2024 Foster Hangdaan
* @license AGPL-3.0-or-later
*
* Vimm DL - Automated game downloader for https://vimm.net/vault.
* Copyright (C) 2024 Foster Hangdaan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/** Class for working with game data obtained from a Vault Page. */
export default class Game {
constructor(
public title: string,
public platform: string,
public regions: string[],
public mediaID: string,
public filename: string,
public downloadSize: string,
public downloadURL: URL,
public vaultURL: URL,
public vaultID: string,
) {}
/**
* Starts downloading the game to disk.
*
* @param ts A callback function to provide a custom TransformStream before the stream is written to disk. Can be used to display download progress or convert the data.
*/
public async download(
destinationDir: string,
ts?: (fileName: string, fileSize: number) => TransformStream<Uint8Array>,
): Promise<void> {
const searchParams = new URLSearchParams({
mediaId: this.mediaID,
});
const requestURL = new URL(
"?" + searchParams.toString(),
this.downloadURL,
);
const fileResponse = await fetch(requestURL, {
headers: {
// Pretend to be a browser
"User-Agent":
"Mozilla/5.0 (X11; Linux x86_64; rv:124.0) Gecko/20100101 Firefox/124.0",
// A referer is needed to pass the bot check. The value of the Vault ID doesn't seem to matter.
Referer: `https://vimm.net/vault/${this.vaultID}`,
Cookie: "counted=1",
},
});
if (!fileResponse.ok) {
throw new Error(
`Response from ${requestURL.toString()} returned a ${fileResponse.status}`,
);
} else if (!fileResponse.body) {
throw new Error("Missing response body.");
}
const contentLength = fileResponse.headers.get("content-length");
if (!contentLength) {
throw new Error("Unable to get content-length.");
}
const fileSizeInBytes = parseInt(contentLength);
if (isNaN(fileSizeInBytes)) {
throw new Error("Unable to determine file size.");
}
const contentDisposition = fileResponse.headers.get("Content-Disposition");
if (!contentDisposition) {
throw new Error(
"Content-Disposition header was not provided. Unable to determine filename and type. Exiting...",
);
}
const match = contentDisposition.match(/filename="(?<filename>.*)"/);
const filename = match?.groups?.filename || this.vaultID;
let rs: ReadableStream<Uint8Array>;
if (ts) {
rs = fileResponse.body.pipeThrough(ts(filename, fileSizeInBytes));
} else {
rs = fileResponse.body;
}
using destinationFile = await Deno.open(
`${destinationDir}/${filename}`,
{
write: true,
create: true,
},
);
await rs.pipeTo(destinationFile.writable);
}
}

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/**
* @file Collection of ready-made `Table` instances.
* @author Foster Hangdaan <foster@hangdaan.email>
* @copyright 2024 Foster Hangdaan
* @license AGPL-3.0-or-later
*
* Vimm DL - Automated game downloader for https://vimm.net/vault.
* Copyright (C) 2024 Foster Hangdaan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { Column, Table } from "cliffy/table/mod.ts";
export const downloadListTable = new Table()
.header([
"Title",
"ID",
"Platform",
"Regions",
"Download Size",
])
.column(4, (new Column()).align("right"))
.padding(2);
export const downloadTotalsTable = new Table()
.padding(2)
.body([
["Total downloads:", "0"],
["Total download size:", "0"],
]);
export const errorsTable = new Table()
.header(["Game", "Error Message"])
.padding(2);

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/**
* @file Helper and utility functions.
* @author Foster Hangdaan <foster@hangdaan.email>
* @copyright 2024 Foster Hangdaan
* @license AGPL-3.0-or-later
*
* Vimm DL - Automated game downloader for https://vimm.net/vault.
* Copyright (C) 2024 Foster Hangdaan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import htmlEntitiesMap from "/resources/html-entities-map.json" with {
type: "json",
};
// Recast the imported htmlEntitiesMap.
const entitiesMap: { [k: string]: string } = htmlEntitiesMap;
const byteMultipliers: { [a: string]: number } = {
KB: Math.pow(10, 3),
MB: Math.pow(10, 6),
GB: Math.pow(10, 9),
TB: Math.pow(10, 12),
PB: Math.pow(10, 15),
EB: Math.pow(10, 18),
ZB: Math.pow(10, 21),
};
/**
* Removes duplicates in a string array.
*
* @example
* ```typescript
* dedup(["a", "a", "b"]); // ["a", "b"]
* ```
*/
export function dedup(a: string[]): string[] {
const seen: string[] = [];
return a.filter((item) => seen.includes(item) ? false : seen.push(item));
}
/**
* Replaces all HTML character entities in `arg` with their equivalent character.
*
* @example
* ```typescript
* decodeEntities("Wayne&#039;s World"); // Wayne's World
* decodeEntities("Rick &amp; Morty"); // Rick & Morty
* ```
*/
export function decodeEntities(arg: string): string {
return arg.replaceAll(/&#?([0-9a-z]{1,});/g, (match, numStr) => {
const numericEntity = parseInt(numStr);
if (isNaN(numericEntity) && typeof numStr === "string") {
return entitiesMap[numStr] || match;
} else {
return String.fromCharCode(numericEntity);
}
});
}
/**
* Parses a string and returns its amount in bytes.
*
* @example
* ```typescript
* parseBytes("3.4 MB"); // 3400000
* ```
*
* @return The number of bytes or `null`. `null` is returned if `arg` does not match the format or if the value is negative (ie. "-6.4 KB").
*/
export function parseBytes(arg: string): number | null {
const match = arg.match(
/(?<quantity>([0-9]*[.])?[0-9]+)\s?(?<unit>[T|G|M|K]?B)/,
);
if (!match || !match.groups) {
return null;
}
const quantity = parseFloat(match.groups.quantity);
const unit = match.groups.unit;
const multiplier = byteMultipliers[unit];
return multiplier ? quantity * multiplier : quantity;
}
/**
* Converts bytes to a human-readable string.
*
* @example
* ```typescript
* bytesToString(3400000); // "3.4 MB"
* bytesToString(5000); // "5.0 KB"
* bytesToString(5000, 0); // "5 KB"
* ```
*/
export function bytesToString(bytes: number, dp = 1): string {
const thresh = 1000;
if (Math.abs(bytes) < thresh) {
return bytes + " B";
}
const units = Object.keys(byteMultipliers);
let u = -1;
const r = 10 ** dp;
do {
bytes /= thresh;
++u;
} while (
Math.round(Math.abs(bytes) * r) / r >= thresh && u < units.length - 1
);
return bytes.toFixed(dp) + " " + units[u];
}

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/**
* @file File housing the `VaultPage` class.
* @author Foster Hangdaan <foster@hangdaan.email>
* @copyright 2024 Foster Hangdaan
* @license AGPL-3.0-or-later
*
* Vimm DL - Automated game downloader for https://vimm.net/vault.
* Copyright (C) 2024 Foster Hangdaan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { ValidationError } from "cliffy/command/mod.ts";
import Game from "/src/game.ts";
import { decodeEntities } from "/src/utils.ts";
/**
* For working with and parsing a Vimm Vault page.
*/
export default class VaultPage {
public id: string;
public url: URL;
constructor(url: string) {
const match = url.match(/^https:\/\/vimm.net\/vault\/(?<id>\d+?)$/m);
if (!match || !match?.groups?.id || !URL.canParse(url)) {
throw new ValidationError(`Invalid Vimm Vault URL: ${url}`);
}
this.url = new URL(url);
this.id = match.groups.id;
}
/**
* Fetches game metadata.
*
* @returns An instance of `Game` with all fields populated.
*/
public async fetchGame(): Promise<Game> {
const pageResponse = await fetch(this.url);
if (!pageResponse.ok) {
throw new Error(`Error fetching page: ${this.url.toString()}`);
}
const contentType = pageResponse.headers.get("content-type");
if (!contentType || !contentType.includes("text/html")) {
throw new Error(`Invalid page content type: ${contentType}`);
}
const bodyText = await pageResponse.text();
// Get the media ID
const inputMatch = bodyText.match(
/<input type="hidden" name="mediaId" value="(?<mediaId>\d*?)">/m,
);
// Get the download link
const actionMatch = bodyText.match(
/action="\/\/(?<downloadLink>download\d*.vimm.net\/download\/)"/m,
);
// Get title
const metaMatch = bodyText.match(
/<meta property="og:title" content="(?<title>.*?)">/m,
);
// Get platform
const platformMatch = bodyText.match(
/<div class="sectionTitle">(?<platform>.*?)<\/div>/m,
);
// Get filename
const filenameMatch = bodyText.match(
/<span id="data-good-title">(?<filename>.*?)<\/span>/,
);
// Get the download size
const downloadSizeMatch = bodyText.match(
/<td.*?id="download_size".*?>(?<size>.*?)<\/td>/,
);
// Get region
const regions = [...bodyText.matchAll(
/<img.*?class="flag".*?title="(?<region>[A-Za-z]{2,15})">/g,
)].map((r) => r.groups?.region || "N/A");
if (
inputMatch && inputMatch.groups &&
actionMatch && actionMatch.groups &&
metaMatch && metaMatch.groups &&
platformMatch && platformMatch.groups &&
filenameMatch && filenameMatch.groups &&
regions.length > 0
) {
return new Game(
decodeEntities(metaMatch.groups.title),
platformMatch.groups.platform,
regions,
inputMatch.groups.mediaId,
decodeEntities(filenameMatch.groups.filename),
downloadSizeMatch?.groups?.size || "N/A",
new URL(`https://${actionMatch.groups.downloadLink}`),
this.url,
this.id,
);
} else {
let message = `Unable to fetch game data for ${this.url.toString()}.`;
if (!inputMatch) {
message += " Media ID not found.";
} else if (!actionMatch) {
message += " Download link not found.";
} else if (!metaMatch) {
message += " Title not found.";
} else if (!platformMatch) {
message += " Platform not found.";
} else if (!downloadSizeMatch) {
message += " Download size not found.";
} else if (regions.length === 0) {
message += " Region not found.";
}
throw new Error(message);
}
}
}