NotificationHandler.sh

#!/usr/bin/env bash

DEFAULT_ICON="bell"

notify_user() {
    local icon="$DEFAULT_ICON"
    local urgency="low"
    local app=""
    local title=""
    local message=""

    while [[ $# -gt 0 ]]; do
        case "$1" in
        --icon|--i|-i)
            icon="$2"
            shift 2
            ;;
        --urgency|--u|-u)
            urgency="$2"
            shift 2
            ;;
        --app|--a|-a)
            app="$2"
            shift 2
            ;;
        --title|--t|-t)
            title="$2"
            shift 2
            ;;
        --message|--m|-m)
            message="$2"
            shift 2
            ;;
        *)
            echo "notify_user: unknown option: $1" >&2
            return 1
            ;;
        esac
    done

    # ---- Mandatory argument checks ----
    [[ -z "$title" ]] && {
        echo "notify_user: --title is required" >&2
        return 1
    }

    [[ -z "$message" ]] && {
        echo "notify_user: --message is required" >&2
        return 1
    }

    # ---- Default app to title if missing ----
    [[ -z "$app" ]] && app="$title"

    # ---- Icon validation ----
    if [[ "$icon" != "$DEFAULT_ICON" ]]; then
        if [[ -f "$icon" && "$icon" =~ \.(png|svg)$ ]]; then
            :
        elif [[ ! "$icon" =~ / ]]; then
            :
        else
            icon="$DEFAULT_ICON"
        fi
    fi

    notify-send -u "$urgency" -i "$icon" -a "$app" "$title" "$message"
}