import { View } from "@nativescript/core/ui/core/view";

// class for css, it can be useful for animations
export class CSS {
    /**
     * Check if the view has passed class
     * @param v view object
     * @param currClass className
     */
    public static HasClass(v: View, currClass: string) {
        return new RegExp("([ ]{1,}|$)" + currClass + "([ ]{1,}|$)").test(
            v.className
        );
    }
    /**
     * Add the passed class to class list of object
     * @param v view object
     * @param currClass class name
     */
    public static AddClass(v: View, currClass: string) {
        const classRegex = new RegExp(
            "([ ]{1,}|$)" + currClass + "([ ]{1,}|$)"
        );
        if (!classRegex.test(v.className)) v.className += " " + currClass;
    }
    /**
     * Remove the passed class from class list of object
     * @param v view object
     * @param currClass class name
     */
    public static RemoveClass(v: View, currClass: string) {
        if (CSS.HasClass(v, currClass)) {
            const classRegex = new RegExp(
                "([ ]{1,}|$)" + currClass + "([ ]{1,}|$)"
            );
            v.className = v.className.replace(classRegex, " ");
        }
    }
    /**
     * Execute a swap between two classes or add the first if none extists
     * @param v view object
     * @param currClass1 class name 1
     * @param currClass2 class name 2
     */
    public static SwapClass(v: View, currClass1: string, currClass2: string) {
        if (CSS.HasClass(v, currClass1)) {
            CSS.RemoveClass(v, currClass1);
            CSS.AddClass(v, currClass2);
        } else {
            if (CSS.HasClass(v, currClass2)) {
                CSS.RemoveClass(v, currClass2);
                CSS.AddClass(v, currClass1);
            } else CSS.AddClass(v, currClass1);
        }
    }
}