Add example template for processor

example_template

@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+readonly dependency=("username/base16-package")
+readonly app="qutebrowser"
+
+path="$1"
+package="$2"
+theme="$3"
+permanent="$4"
+
+## Main Entrypoint
+#
+#  Finds the right theme template file and starts theme
+#  switching and, if necessary, permanent setting processes.
+main() {
+  dbg_msg $app "Starting Processor"
+  tfile="$path/$package/themes/default/base16-$theme.config.py"
+
+  if ! file_exists "$tfile"; then
+    dbg_msg $app "error" "Theme template $theme not found in package $package"
+    exit 1
+  fi
+
+  if [[ "$permanent" == "true" ]]; then save; fi
+  theme
+
+  dbg_msg $app "Processor Done"
+}
+
+## Theme switcher
+#
+#  Makes sure that if any application instance is
+#  currently running, it switches to new theme.
+theme() {
+  dbg_msg $app "Switching theme"
+  # switcheroo
+  dbg_msg $app "Successfully switched theme"
+}
+
+## Theme setter
+#
+#  Takes care of permanently writing the desired
+#  base16 theme into application settings.
+save() {
+  dbg_msg $app "Saving theme"
+  # saveroo
+  dbg_msg $app "Sucessfully Saved theme"
+}
+
+## Theme includer
+#
+#  Makes sure that theme is actually included in
+#  default application startup routine.
+#  This is the most invasive step of theming since it
+#  rewrites within existing configuration files.
+include() {
+  dbg_msg $app "Including theme in configuration"
+  # includeroo
+  dbg_msg $app "Sucessfully included theme"
+}
+
+## Dependency Checker
+#
+#  Makes sure the processor is called for the correct
+#  base16 package, or refuses to run if it is not.
+if printf '%s\n' "${dependency[@]}" | grep -q -P "^$package$"; then
+  # Safe sourcing: https://stackoverflow.com/a/12694189
+  DIR="${BASH_SOURCE%/*}"
+  if [[ ! -d "$DIR" ]]; then DIR="$PWD"; fi
+  # shellcheck source=utilities.sh
+  . "$DIR/utilities.sh"
+
+  theme_qutebrowser
+else
+  dbg_msg $app "error" "Processor does not work for package $package"
+fi