package spam

import (
	"errors"
	"strings"
)

// SpamWebsites to third-party video hosting apps: we already have our own chat room, and third-party links shared in
// public places can pose a risk to user privacy/safety.
var SpamWebsites = []string{
	"join.skype.com",
	"zoom.us",
	"whereby.com",
	"meet.jit.si",
	"https://t.me",
}

// DetectSpamMessage searches a message (such as a comment, forum post, etc.) for spammy contents such as Skype invite links
// and returns an error if found.
func DetectSpamMessage(message string) error {
	for _, link := range SpamWebsites {
		if strings.Contains(message, link) {
			return errors.New(
				"Your message could not be posted because it contains a link to a third-party video chat website. " +
					"In the interest of protecting our community, we do not allow linking to third-party video conferencing apps where user " +
					"privacy and security may not hold up to our standards, or where the content may run against our terms of service.",
			)
		}
	}

	return nil
}