add input-remapper-switcher script and readme

system/input-remapper-switcher/README.md

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+# input-remapper-switcher
+
+Automatically switches [input-remapper](https://github.com/sezanzeb/input-remapper) presets on a per-game (or per-app) basis when used with the **Hyprland** window manager.
+
+## How It Works
+
+1. Connects to the Hyprland socket (`.socket2.sock`) and listens for `activewindowv2` events.
+2. On each window change, it grabs the focused window's **class** and **title** via `hyprctl activewindow -j | jq`.
+3. If either value matches a configured entry in the `PROFILES` associative array, it activates the corresponding input-remapper preset on your device.
+4. When an unknown window is focused, it deactivates the last active preset.
+
+> Uses `input-remapper-control` under the hood to start/stop presets.
+
+## Adding a Game Profile
+
+1. Find the window class or title of your game:
+   - Run `hyprctl clients` and locate the game in the output (class and title are listed for each window)
+2. Get the exact name of your input device:
+   - `sudo input-remapper-control --list-devices`
+3. Edit `input-remapper-switcher.sh` and add an entry to the `PROFILES` array (line 6):
+
+```bash
+declare -A PROFILES=(
+    ["Grand Theft Auto V"]="GTA"
+    ["steam_app_1151340"]="Fallout"
+    ["steam_app_1203620"]="Enshrouded"
+    # Add yours here:
+    ["Your Window Class or Title"]="Your Preset Name"
+)
+```
+
+4. If your device is different, update `DEVICE_NAME` on line 13:
+```bash
+DEVICE_NAME="Your Device Name"
+```
+
+## Usage
+
+Run the script manually or launch it at Hyprland startup (e.g., in `hyprland.conf`):
+
+```conf
+exec-once = ~/.config/hypr/scripts/input-remapper-switcher.sh
+```
+
+The script runs in the foreground listening for events — it does not daemonize on its own.

system/input-remapper-switcher/input-remapper-switcher.sh

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+#!/usr/bin/env bash
+# ~/.config/hypr/scripts/input-remapper-switcher.sh
+
+# Define your mappings: "Window Class" -> "Preset Name"
+# Use 'hyprctl clients' to find the 'class' of your windows.
+declare -A PROFILES=(
+    ["Grand Theft Auto V"]="GTA"
+    ["steam_app_1151340"]="Fallout"
+    ["steam_app_1203620"]="Enshrouded"
+)
+
+# Get exact name via: sudo input-remapper-control --list-devices
+DEVICE_NAME="Logitech G502 LIGHTSPEED Wireless Gaming Mouse" 
+
+last_class=""
+last_title=""
+
+class(){
+    local target_preset_class="${PROFILES[$active_class]}"
+
+    echo "Activating preset '$target_preset_class' for class '$active_class'"
+    input-remapper-control --command start --device "$DEVICE_NAME" --preset "$target_preset_class" > /dev/null 2>&1
+
+    last_class="${target_preset_class}"
+}
+
+title(){
+    local target_preset_title="${PROFILES[$active_title]}"
+
+    echo "Activating preset '$target_preset_title' for title '$active_title'"
+    input-remapper-control --command start --device "$DEVICE_NAME" --preset "$target_preset_title" > /dev/null 2>&1
+
+    last_title="${target_preset_title}"
+}
+
+none(){
+    
+    if [[ -n $last_class ]]; then
+        echo "Deactivating preset for '${last_class}'"
+        input-remapper-control --command stop --device "$DEVICE_NAME" --preset "${active_class}" > /dev/null 2>&1
+        last_class=""
+    elif [[ -n $last_title ]]; then
+        echo "Deactivating preset for '${last_title}'"
+        input-remapper-control --command stop --device "$DEVICE_NAME" --preset "${active_title}" > /dev/null 2>&1
+        last_title=""
+    fi
+}
+
+doit(){
+    # local active_class
+    active_class=$(hyprctl activewindow -j | jq -r '.class')
+    # local active_title
+    active_title=$(hyprctl activewindow -j | jq -r '.title')
+
+    if [[ -v PROFILES["$active_class"] ]]; then
+        # echo "found class ${active_class}"
+        class
+    elif [[ -v PROFILES["$active_title"] ]]; then
+        # echo "found title ${active_title}"
+        title
+    else
+        none
+    fi
+}
+
+cleanup() {
+    echo ""
+    echo "Performing cleanup on exit..."
+    # Cleanup logic here
+}
+
+# Trap EXIT covers normal exit, errors, SIGINT, and SIGTERM
+trap cleanup EXIT
+
+# Listen to the Hyprland socket for active window changes
+# 'activewindowv2' sends events when the active window changes
+socat - "UNIX-CONNECT:$XDG_RUNTIME_DIR/hypr/$HYPRLAND_INSTANCE_SIGNATURE/.socket2.sock" | \
+while read -r line; do
+    if [[ "$line" =~ ^activewindowv2 ]]; then
+        doit
+    fi
+done