add convenience functinos to nu

Proxied wrappers around messengers and a nifty function to write pngs
from the clipboard to a file with a single terminal command.

nushell/config.nu

@@ -20,6 +20,47 @@ def lt [] { ls | sort-by type name -i | grid -c | str trim }
 alias j = joshuto
 alias e = hx .
 alias code = cd ~/dev/
+alias naive = naiveproxy .config/naiveproxy.json
+
+def discord [] {
+    if $env.http_proxy? != null {
+        webcord --proxy-server=($env.http_proxy)
+    } else {
+        webcord
+    }
+}
+
+def element [] {
+    if $env.http_proxy? != null {
+        element-desktop --proxy-server=($env.http_proxy)
+    } else {
+        element-desktop
+    }
+}
+
+# Save an image from the clipboard to `file` or `clipboard.png` if no parameter is given
+def save_png [file: string = "clipboard"] {
+    # -----
+    # Check for a png image available in the X clipboard
+    # ----v
+    let targets = xclip -selection clipboard -t TARGETS -o   # Line separated list of available Atoms
+    let num_png = $targets | find image/png | length         # Count the number of image/png occurences
+    if $num_png < 1 {
+        print "There is no valid png image in the clipboard" 
+        return null                                          # Abort
+    }
+
+    # NOTE: Another application may have jumped in here and cleared the clipboard
+    #       selection. This is unlikely but begs for admonition here.
+
+    # ----
+    # Save the png in the clipboard to the file requested
+    # ---v
+    let file = $"($file).png"                                # Append png to the target file name
+    xclip -selection clipboard -t image/png -o | save $file  # Get clipboard png contents and write them to `file`
+
+    print $"Clipboard saved to `($file)`"
+}
 
 # Go to the repository with the name and start a nix development shell there.
 # If no argument is given a nix development shell will be started in the current dir.