better structure

scripts/change-wallpaper

@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+
+# Select image file if none is provided
+if [ -z "$1" ]; then
+    image=$(zenity --file-selection --title="Open File" --file-filter="*.jpg *.jpeg *.png *.webp *.bmp *.jfif *.tiff *.avif *.heic *.heif")
+else
+    image="$1"
+fi
+
+[ -z "$image" ] && exit 1
+[ ! -f "$image" ] && exit 1
+
+
+# $HOME/.config/wallpaper-chooser/config.json:
+# ```json
+# "sort": {
+#    "type": "date",
+#    "reverse": true
+# }
+# ```
+# So in order to let the most recently used wallpapers appear first:
+touch "$image"
+
+
+# Copy image to local wallpaper directory
+
+ext=${image##*.}
+random_name=$(tr -dc 'a-zA-Z0-9' </dev/urandom | head -c 16)
+current_dir="$HOME/.local/share/wallpaper/current"
+image_copied="$current_dir/wallpaper-${random_name}.${ext}"
+
+mkdir -p "$current_dir" || (
+    echo "Could not create directory $current_dir"
+    exit 1
+)
+
+temp_img=$(mktemp --suffix=."$ext") || exit 1
+trap 'rm -f "$temp_img"' EXIT
+cp "$image" "$temp_img" || exit 1
+rm -f "${current_dir:?}"/wallpaper-*
+cp -f "$temp_img" "$image_copied" || (
+    echo "Could not copy image to $current_dir"
+    exit 1
+)
+
+# Generate blurred wallpaper
+
+blur_dir="$HOME/.local/share/wallpaper/blurred"
+mkdir -p "$blur_dir" || (
+    echo "Could not create cache directory"
+    exit 1
+)
+rm -f "${blur_dir:?}"/blurred-*
+blurred_image="$blur_dir/blurred-${random_name}.$ext"
+
+## Time consuming task (magick -blur) in background
+(
+    # notify-send -a "change-wallpaper" "Generating Blurred Wallpaper" "This may take a few seconds..."
+
+    sigma=$(magick identify -format "%w %h" "$image_copied" | awk -v f=0.01 '{
+        m=($1>$2)?$1:$2;
+        s=m*f;
+        if(s<2) s=2;
+        if(s>200) s=200;
+        printf "%.2f", s
+    }')
+
+    ### use a temporary file to avoid incomplete file being used
+    temp_blurred=$(mktemp --suffix=."$ext") || exit 1
+    trap 'rm -f "${temp_blurred}"' EXIT
+    magick "$image_copied" -blur 0x"$sigma" "$temp_blurred" || (
+        echo "Could not create blurred image"
+        exit 1
+    )
+    mv -f "$temp_blurred" "$blurred_image" || (
+        echo "Could not move blurred image to cache directory"
+        exit 1
+    )
+
+    if [ "$XDG_CURRENT_DESKTOP" = "niri" ]; then
+        swww img -n backdrop "$blurred_image" --transition-type fade --transition-duration 2 > /dev/null 2> /dev/null
+    fi
+
+    notify-send -a "change-wallpaper" "Blurred Wallpaper Generated" "$blurred_image" -i "$blurred_image"
+) &
+
+# Apply wallpaper
+
+if [ "$XDG_CURRENT_DESKTOP" = "Hyprland" ]; then
+    swww img -n background "$image_copied" --transition-type fade --transition-duration 2 > /dev/null 2> /dev/null
+
+    notify-send -a "change-wallpaper" "Wallpaper Changed" "$image" -i "$image_copied"
+
+    change-colortheme -i "$image_copied" || exit 1
+elif [ "$XDG_CURRENT_DESKTOP" = "niri" ]; then
+    swww img -n background "$image_copied" --transition-type fade --transition-duration 2 > /dev/null 2> /dev/null
+
+    notify-send -a "change-wallpaper" "Wallpaper Changed" "$image" -i "$image_copied"
+
+    change-colortheme -i "$image_copied" || exit 1
+else
+    echo "Unsupported desktop environment: $XDG_CURRENT_DESKTOP"
+    exit 1
+fi