Improve Windows converter downloading

autodl_files/converter_windows

@@ -0,0 +1,7 @@
+https://uupdump.net/misc/7zr.exe
+  out=7zr.exe
+  checksum=sha-256=108ab5f1e36f2068e368fe97cd763c639e403cac8f511c6681eaf19fc585d814
+
+https://uupdump.net/misc/uup-converter-wimlib.7z
+  out=uup-converter-wimlib.7z
+  checksum=sha-256=7f07dfc0fa041820746c55c2704fd18f8930b984ca472d2ac397a1c69f15f3af

autodl_files/depends_win.ps1

@@ -1,91 +0,0 @@
-<#
-This was made because I refuse to continue taking part in the unwritten
-PowerShell/Batch obfuscation contest.
-#>
-
-param (
-    [Parameter()]
-    [Switch]$ForDownload
-)
-
-<#
-There are myths that some Windows versions do not work without this.
-
-Since I can't be arsed to verify this, I'm just adding this to lower the number
-of reports to which I would normally respond with "works on my machine".
-#>
-try {
-    [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
-} catch {
-    Write-Error "Outdated operating systems are not supported."
-    Exit 1
-}
-
-$filesDownload = @('aria2c.exe')
-$filesConvert = @('aria2c.exe', '7zr.exe', 'uup-converter-wimlib.7z')
-
-$urls = @{
-    'aria2c.exe' = 'https://uupdump.net/misc/aria2c.exe';
-    '7zr.exe' = 'https://uupdump.net/misc/7zr.exe';
-    'uup-converter-wimlib.7z' = 'https://uupdump.net/misc/uup-converter-wimlib.7z';
-}
-
-$hashes = @{
-    'aria2c.exe' = '0ae98794b3523634b0af362d6f8c04a9bbd32aeda959b72ca0e7fc24e84d2a66';
-    '7zr.exe' = '108ab5f1e36f2068e368fe97cd763c639e403cac8f511c6681eaf19fc585d814';
-    'uup-converter-wimlib.7z' = '7f07dfc0fa041820746c55c2704fd18f8930b984ca472d2ac397a1c69f15f3af';
-}
-
-function Retrieve-File {
-    param (
-        [String]$File,
-        [String]$Url
-    )
-
-    Write-Host -BackgroundColor Black -ForegroundColor Yellow "Downloading ${File}..."
-    Invoke-WebRequest -UseBasicParsing -Uri $Url -OutFile "files\$File" -ErrorAction Stop
-}
-
-function Test-Hash {
-    param (
-        [String]$File,
-        [String]$Hash
-    )
-
-    Write-Host -BackgroundColor Black -ForegroundColor Cyan "Verifying ${File}..."
-
-    $fileHash = (Get-FileHash -Path "files\$File" -Algorithm SHA256 -ErrorAction Stop).Hash
-    return ($fileHash.ToLower() -eq $Hash)
-}
-
-if($ForDownload.IsPresent) {
-    $files = $filesDownload
-} else {
-    $files = $filesConvert
-}
-
-if(-not (Test-Path -PathType Container -Path "files")) {
-    $null = New-Item -Path "files" -ItemType Directory
-}
-
-foreach($file in $files) {
-    try {
-        Retrieve-File -File $file -Url $urls[$file]
-    } catch {
-        Write-Host "Failed to download $file"
-        Write-Host $_
-        Exit 1
-    }
-}
-
-Write-Host ""
-
-foreach($file in $files) {
-    if(-not (Test-Hash -File $file -Hash $hashes[$file])) {
-        Write-Error "$file appears to be tampered with"
-        Exit 1
-    }
-}
-
-Write-Host ""
-Write-Host -BackgroundColor Black -ForegroundColor Green "It appears all the dependencies are ready."

autodl_files/get_aria2.ps1

@@ -0,0 +1,64 @@
+try {
+    [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+} catch {
+    Write-Error "Outdated operating systems are not supported."
+    Exit 1
+}
+
+$file = 'aria2c.exe'
+$url = 'https://uupdump.net/misc/aria2c.exe';
+$hash = '0ae98794b3523634b0af362d6f8c04a9bbd32aeda959b72ca0e7fc24e84d2a66';
+
+function Test-Existece {
+    param (
+        [String]$File
+    )
+
+    return Test-Path -PathType Leaf -Path "files\$File"
+}
+
+function Retrieve-File {
+    param (
+        [String]$File,
+        [String]$Url
+    )
+
+    Write-Host -BackgroundColor Black -ForegroundColor Yellow "Downloading ${File}..."
+    Invoke-WebRequest -UseBasicParsing -Uri $Url -OutFile "files\$File" -ErrorAction Stop
+}
+
+function Test-Hash {
+    param (
+        [String]$File,
+        [String]$Hash
+    )
+
+    Write-Host -BackgroundColor Black -ForegroundColor Cyan "Verifying ${File}..."
+
+    $fileHash = (Get-FileHash -Path "files\$File" -Algorithm SHA256 -ErrorAction Stop).Hash
+    return ($fileHash.ToLower() -eq $Hash)
+}
+
+if((Test-Existece -File $file) -and (Test-Hash -File $file -Hash $hash)) {
+    Write-Host -BackgroundColor Black -ForegroundColor Green "Ready."
+    Exit 0
+}
+
+if(-not (Test-Path -PathType Container -Path "files")) {
+    $null = New-Item -Path "files" -ItemType Directory
+}
+
+try {
+    Retrieve-File -File $file -Url $url
+} catch {
+    Write-Host "Failed to download $file"
+    Write-Host $_
+    Exit 1
+}
+
+if(-not (Test-Hash -File $file -Hash $hash)) {
+    Write-Error "$file appears to be tampered with"
+    Exit 1
+}
+
+Write-Host -BackgroundColor Black -ForegroundColor Green "Ready."