feat(fun/uggc): create a rot13 url handler r/968

Example usage:
$ /nix/store/9kgpv4n62vhxs971jkvwvvl3msm4wpm8-uggc/bin/uggc 'uggcf://gjvggre.pbz/alnabgrpu/fgnghf/1272363652679524352'

Change-Id: I8fd5f77416116ce1a6ab7f96d3f2c726ef663677
Reviewed-on: https://cl.tvl.fyi/c/depot/+/386
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: eta <eta@theta.eu.org>

4 files changed, 82 insertions, 0 deletions

diff --git a/fun/uggc/default.nix b/fun/uggc/default.nix
new file mode 100644
index 0000000000..398e7b6ffe
--- /dev/null
+++ b/fun/uggc/default.nix
@@ -0,0 +1,14 @@
+{ depot, ... }@args:
+
+let
+  gopkgs = depot.third_party.gopkgs;
+in
+depot.nix.buildGo.program {
+  name = "uggc";
+  srcs = [
+    ./main.go
+  ];
+  deps = [
+    gopkgs."github.com".pkg.browser.gopkg
+  ];
+}
diff --git a/fun/uggc/main.go b/fun/uggc/main.go
new file mode 100644
index 0000000000..94f8cf0925
--- /dev/null
+++ b/fun/uggc/main.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/pkg/browser"
+)
+
+func rot13(r rune) rune {
+	if 'a' <= r && r <= 'm' {
+		return r + ('n' - 'a')
+	} else if 'n' <= r && r <= 'z' {
+		return r - ('n' - 'a')
+	}
+	if 'A' <= r && r <= 'M' {
+		return r + ('N' - 'A')
+	} else if 'N' <= r && r <= 'Z' {
+		return r - ('N' - 'A')
+	}
+	return r
+}
+
+func main() {
+	if len(os.Args) == 0 {
+		fmt.Println("usage: uggc [rot13-encoded URL]")
+		return
+	}
+	urlText := strings.Join(os.Args[1:], " ")
+	corrected := strings.Map(rot13, urlText)
+
+	err := browser.OpenURL(corrected)
+
+	if err != nil {
+		fmt.Println("could not launch browser:", err)
+	}
+}
diff --git a/fun/uggc/uggc.desktop b/fun/uggc/uggc.desktop
new file mode 100644
index 0000000000..5203277f4a
--- /dev/null
+++ b/fun/uggc/uggc.desktop
@@ -0,0 +1,7 @@
+[Desktop Entry]
+Type=Application
+Name=Rot13 URL Handler
+Exec=uggc %u
+StartupNotify=false
+MimeType=x-scheme-handler/uggc;
+MimeType=x-scheme-handler/uggcf;
diff --git a/fun/uggc/uggc.reg b/fun/uggc/uggc.reg
new file mode 100644
index 0000000000..bfb8e1952f
--- /dev/null
+++ b/fun/uggc/uggc.reg
@@ -0,0 +1,23 @@
+Windows Registry Editor Version 5.00
+
+[HKEY_CLASSES_ROOT\uggc]
+"URL Protocol"=""
+@="URL:Rot13 HTTP URL Protocol"
+
+[HKEY_CLASSES_ROOT\uggcf]
+"URL Protocol"=""
+@="URL:Rot13 HTTPS URL Protocol"
+
+[HKEY_CLASSES_ROOT\uggc\shell]
+
+[HKEY_CLASSES_ROOT\uggcf\shell]
+
+[HKEY_CLASSES_ROOT\uggc\shell\open]
+
+[HKEY_CLASSES_ROOT\uggcf\shell\open]
+
+[HKEY_CLASSES_ROOT\uggc\shell\open\command]
+@="\"C:\\Program Files\\uggc\\uggc.exe\" \"%1\""
+
+[HKEY_CLASSES_ROOT\uggcf\shell\open\command]
+@="\"C:\\Program Files\\uggc\\uggc.exe\" \"%1\""