function isUrl(str) {
 	var pattern = new RegExp("\\b(((ht|f)tp(s?)\\:\\/\\/|~\\/|\\/)|www.)" +
    	"(\\w+:\\w+@)?(([-\\w]+\\.)+(com|org|net|gov" +
    	"|mil|biz|info|mobi|name|aero|jobs|museum" +
    	"|travel|[a-z]{2}))(:[\\d]{1,5})?" +
		"(((\\/([-\\w~!$+|.,=]|%[a-f\\d]{2})+)+|\\/)+|\\?|#)?" +
		"((\\?([-\\w~!$+|.,*:]|%[a-f\\d{2}])+=?" +
		"([-\\w~!$+|.,*:=]|%[a-f\\d]{2})*)" +
		"(&(?:[-\\w~!$+|.,*:]|%[a-f\\d{2}])+=?" +
		"([-\\w~!$+|.,*:=]|%[a-f\\d]{2})*)*)*" +
		"(#([-\\w~!$+|.,*:=]|%[a-f\\d]{2})*)?\\b");
  	if(!pattern.test(str)) {
    	return false;
  	} else {
    	return true;
  	}
}

function thumbnail(msg, coll, guid, offline, socket) {
    if(msg.thumbnail != undefined && msg.channel && msg.channel != undefined && isUrl(msg.thumbnail)){
        if(typeof(msg.channel) != "string" || typeof(msg.thumbnail) != "string")
             {
                var result = {
                    channel: {
                        expected: "string",
                        got: msg.hasOwnProperty("channel") ? typeof(msg.channel) : undefined,
                    },
                    pass: {
                        expected: "string",
                        got: msg.hasOwnProperty("pass") ? typeof(msg.pass) : undefined,
                    },
                    thumbnail: {
                        expected: "string",
                        got: msg.hasOwnProperty("thumbnail") ? typeof(msg.thumbnail) : undefined,
                    },
                    adminpass: {
                        expected: "string",
                        got: msg.hasOwnProperty("adminpass") ? typeof(msg.adminpass) : undefined,
                    },
                };
                socket.emit("update_required", result);
                return;
            }
            coll = coll.replace(/ /g,'');
        Functions.getSessionAdminUser(Functions.getSession(socket), coll, function(userpass, adminpass) {
            if(userpass != "" || msg.userpass == undefined) {
                msg.userpass = userpass;
            }
            if(adminpass != "" || msg.adminpass == undefined) {
                msg.adminpass = adminpass;
            }
            if(msg.thumbnail != "") {
                msg.thumbnail = msg.thumbnail.replace(/^https?\:\/\//i, "");
                if(msg.thumbnail.substring(0,2) != "//") msg.thumbnail = "//" + msg.thumbnail;
            }
            var channel = msg.channel.toLowerCase();
            var hash = Functions.hash_pass(Functions.hash_pass(Functions.decrypt_string(msg.adminpass),true));
            db.collection(channel + "_settings").find({id: "config"}, function(err, docs){
                if(docs.length > 0 && (docs[0].userpass == undefined || docs[0].userpass == "" || (msg.hasOwnProperty('pass') && docs[0].userpass == crypto.createHash('sha256').update(Functions.decrypt_string(msg.pass)).digest("base64")))) {
                    if(docs !== null && docs.length !== 0 && docs[0].adminpass !== "" && docs[0].adminpass == hash){
                        db.collection("suggested_thumbnails").update({channel: channel}, {$set:{thumbnail: msg.thumbnail}}, {upsert:true}, function(err, docs){
                            Notifications.requested_change("thumbnail", msg.thumbnail, channel);
                            socket.emit("toast", "suggested_thumbnail");
                        });
                    }
                } else {
                    socket.emit("auth_required");
                }
            });
        });
    } else {
        socket.emit("toast", "thumbnail_denied");
    }
}

function description(msg, coll, guid, offline, socket) {
    if(msg.description && msg.channel && msg.description.length < 100){
        if(typeof(msg.channel) != "string" || typeof(msg.description) != "string") {
                var result = {
                    channel: {
                        expected: "string",
                        got: msg.hasOwnProperty("channel") ? typeof(msg.channel) : undefined,
                    },
                    pass: {
                        expected: "string",
                        got: msg.hasOwnProperty("pass") ? typeof(msg.pass) : undefined,
                    },
                    description: {
                        expected: "string",
                        got: msg.hasOwnProperty("description") ? typeof(msg.description) : undefined,
                    },
                    adminpass: {
                        expected: "string",
                        got: msg.hasOwnProperty("adminpass") ? typeof(msg.adminpass) : undefined,
                    },
                };
                socket.emit("update_required", result);
                return;
            }
            coll = coll.replace(/ /g,'');
        Functions.getSessionAdminUser(Functions.getSession(socket), coll, function(userpass, adminpass, gotten) {
            if(userpass != "" || msg.userpass == undefined) {
                msg.userpass = userpass;
            }
            if(adminpass != "" || msg.adminpass == undefined) {
                msg.adminpass = adminpass;
            }
            var channel = msg.channel.toLowerCase();
            var hash = Functions.hash_pass(Functions.hash_pass(Functions.decrypt_string(msg.adminpass), true));
            db.collection(channel + "_settings").find({id: "config"}, function(err, docs){
                if(docs.length > 0 && (docs[0].userpass == undefined || docs[0].userpass == "" || (msg.hasOwnProperty('pass') && docs[0].userpass == crypto.createHash('sha256').update(Functions.decrypt_string(msg.pass)).digest("base64")))) {
                    if(docs !== null && docs.length !== 0 && docs[0].adminpass !== "" && docs[0].adminpass == hash){
                        db.collection("suggested_descriptions").update({channel: channel}, {$set:{description: msg.description}}, {upsert:true}, function(err, docs){
                            Notifications.requested_change("description", msg.description, channel);
                            socket.emit("toast", "suggested_description");
                        });
                    }
                } else {
                    socket.emit("auth_required");
                }
            });
        });
    } else {
        socket.emit("toast", "description_denied");
    }
}

module.exports.thumbnail = thumbnail;
module.exports.description = description;