var detectOs = {
    getUserAgent: () => {
        return navigator.userAgent;
    },
    getPlatform: () => {
        return navigator.platform;
    },
    isIos: () => {
        return /iPhone|iPad|iPod/.test(detectOs.getPlatform());
    },
    isAndroid: () => {
        return /Android/.test(detectOs.getUserAgent());
    },
    isBlackBerry: () => {
        return /BlackBerry/.test(detectOs.getPlatform());
    },
    isMac: () => {
        return /Mac/.test(detectOs.getPlatform());
    },
    isWindows: () => {
        return /Win/.test(detectOs.getPlatform());
    },
    isLinux: () => {
        return /Linux/.test(detectOs.getPlatform()) && !detectOs.isAndroid();
    },
    get: () => {
        if (detectOs.isIos()) return 'iOS';
        if (detectOs.isAndroid()) return 'Android';
        if (detectOs.isBlackBerry()) return 'BlackBerry';
        if (detectOs.isMac()) return 'Mac';
        if (detectOs.isWindows()) return 'Windows';
        if (detectOs.isLinux()) return 'Linux';
        return 'Unknown';
    }
}

var detectFBPageName = {
    getName: (pageUrl) => {
        try{
            var url = new URL(pageUrl);
            return url.pathname.split("/").pop()
        } catch(ex){
            console.log(ex);
            return false;
        }   
        return false;
    }
}

jQuery(document).ready(function(){
    jQuery(".fab.fa-facebook-f").closest("a").each(function(){

        var pageID = detectFBPageName.getName(jQuery(this).attr("href"));
        
        if(!pageID){
            return;
        } 

        if(detectOs.isAndroid()){
            jQuery(this).attr("href", "fb://page/" + pageID);
        } else if (detectOs.isIos()){
            jQuery(this).attr("href", "fb://profile/" + pageID);
        }
    })
});