implement random wallpaper download from Wallhaven API with topic selection

change-wallpaper.sh

@@ -1,26 +1,73 @@
 #!/usr/bin/env bash
 
-IMG="$1"
+# Wallhaven API configuration
+WALLHAVEN_API="https://wallhaven.cc/api/v1"
+WALLPAPER_DIR="$HOME/Pictures/wallpapers"
+TOPICS=(
+    "konosuba"
+    "bunny girl senpai"
+    "oshi no ko"
+    "kill la kill"
+    "lofi"
+    "eminence in shadow"
+    "mobuseka"
+)
 
-if [[ -f "$IMG" ]]; then
-	echo "Changing wallpaper to $IMG"
-	echo "$IMG" > "$HOME/.wallpaper"
-	hyprctl hyprpaper reload ,"$IMG"
-	notify-send -i hyprpaper -u normal "change-wallpaper.sh" "Wallpaper changed to ${IMG##*/variety/}"
-	exit 0
+# Create wallpaper directory if it doesn't exist
+mkdir -p "$WALLPAPER_DIR"
+
+# Function to download a random wallpaper from Wallhaven
+download_random_wallpaper() {
+    # Select a random topic
+    local random_topic="${TOPICS[$RANDOM % ${#TOPICS[@]}]}"
+    local query=$(echo "$random_topic" | sed 's/ /+/g')
+    
+    echo "Searching for wallpapers related to: $random_topic" >&2
+    
+    # Get wallpapers from Wallhaven API
+    local response=$(curl -s "$WALLHAVEN_API/search?q=$query&purity=100&categories=110&sorting=random")
+    
+    # Get a random image URL from the response
+    local url=$(echo "$response" | jq -r '.data[0].path')
+    
+    if [ -n "$url" ] && [ "$url" != "null" ]; then
+        local filename=$(basename "$url")
+        echo "Downloading: $filename" >&2
+        curl -s "$url" -o "$WALLPAPER_DIR/$filename"
+        if [ $? -eq 0 ]; then
+            echo "$WALLPAPER_DIR/$filename"
+            echo "$random_topic" > "$WALLPAPER_DIR/.last_topic"
+            return 0
+        fi
+    fi
+    
+    echo "No wallpapers found for topic: $random_topic" >&2
+    return 1
+}
+
+# Handle direct image file input
+if [[ -f "$1" ]]; then
+    echo "Changing wallpaper to $1"
+    echo "$1" > "$HOME/.wallpaper"
+    hyprctl hyprpaper reload ,"$1"
+    notify-send -i hyprpaper -u normal "change-wallpaper.sh" "Wallpaper changed to ${1##*/}"
+    exit 0
 fi
 
-WALLPAPER_DIR="$HOME/Pictures/variety/"
-CURRENT_WALL=$(hyprctl hyprpaper listloaded)
+# Download a new random wallpaper
+new_wallpaper=$(download_random_wallpaper)
 
-# Get a random wallpaper that is not the current one
-WALLPAPER=$(find "$WALLPAPER_DIR" -type f ! -name "$(basename "$CURRENT_WALL")" ! -name "*.json" | shuf -n 1)
-# remove double slashes that's there for some reason
-WALLPAPER=$(printf "%s" "$WALLPAPER" | tr -s '/')
+if [ -n "$new_wallpaper" ] && [ -f "$new_wallpaper" ]; then
+    echo "Changing wallpaper to $new_wallpaper"
+    echo "$new_wallpaper" > "$HOME/.wallpaper"
     
-echo "Changing wallpaper to $WALLPAPER"
-echo "$WALLPAPER" > "$HOME/.wallpaper"
+    # Get the topic used for this wallpaper
+    topic=$(cat "$WALLPAPER_DIR/.last_topic")
     
-# Apply the selected wallpaper
-hyprctl hyprpaper reload ,"$WALLPAPER"
-notify-send -i hyprpaper -u normal "change-wallpaper.sh" "Wallpaper changed to ${WALLPAPER##*/variety/}"
+    # Apply the selected wallpaper
+    hyprctl hyprpaper reload ,"$new_wallpaper"
+    notify-send -i hyprpaper -u normal "change-wallpaper.sh" "Wallpaper changed to ${new_wallpaper##*/wallpapers/} ($topic)"
+else
+    notify-send -i hyprpaper -u critical "change-wallpaper.sh" "Failed to download new wallpaper"
+    exit 1
+fi