QuitNow!'s e-mail suggester
People don't write e-mail addresses without misspelling from time to time. @gmial.con addresses are too common... And we need to put a stop to it!
QuitNow!'s server is doing the usual e-mail validaton during user creation time. We're doing it like everyone does: sending an e-mail to the user, and waiting for the user to click a link. The only validation we do is to check the e-mail with usual regex... but we need to go a little beyond that. Looking for .con and suggesting .com is something that would make the world a better place!
By the way, we recently learnt a lot about TDD (Test-Driven Development) at some Karumi masterclasses, so we decided to go on with TDD. The only way to master something is by doing. Incidentally, it will be useful if we improve our e-mail validation (and, hopefully, yours).
If you want to see what suggestions and validations are being done, check the actual tests. It's an easy way for us to document the behaviour, and it's the tried-and-true list for you to know what's exactly happening here.
// Hello! Let me show the magic of this library: the email suggester
EmailSuggester suggester = new EmailSuggester();
// It is a little thing that has an algorithm to fix human typos.
// Let's say your user mistyped his email address:
String badEmail = "roc@gmial.com";
String goodEmail = suggester.getSuggestedEmail(badEmail);
// goodEmail will contain the fixed email address. WOW!
// And there are tons of email fixes. They're listed at https://goo.gl/IF52EV
// In addition, it will never suggest a bad domain. All the suggestions are written one by one,
// based on the QuitNow! users and their e-mail bounces. If it doesn't know nothing
// better than the input, it will return the same email.// Well! Something else? Yes: this library hosts some more email related things
EmailValidator validator = new EmailValidator();
validator.hasGoodSyntax(goodEmail); //Does it match the email regex?
validator.hasValidTld(goodEmail); //Has it a valid TLD?
validator.isAlias(goodEmail); //Is it an alias?
validator.isDisposable(goodEmail); //Is it listed as a disposable domain?
// To finish up: if you work with Android, you'll find roc@fewlaps.com:WhatEVER emails
// If you want to clean them, here it goes:
AndroidAccountEmailCleaner cleaner = new AndroidAccountEmailCleaner();
String androidAccountEmail = "roc@fewlaps.com:WhatEVER";
String cleanedEmail = cleaner.cleanEmail(androidAccountEmail);
// cleanedEmail will contain roc@fewlaps.com- .hasValidTld() is getting data from this public repo: https://github.com/publicsuffix/list
- .isDisposable() is checking the domain against this another one: https://github.com/ivolo/disposable-email-domains
The files needs to be attached to the project cause they're parsed locally.
So, before starting, initalise git submodules:
git submodule update --init --recursive
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Get the latest .jar
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Grab via Gradle:
repositories { jcenter() }
compile 'com.fewlaps.quitnowemailsuggester:quitnow-email-suggester:2.0.0'- Grab via Maven:
<repository>
<id>jcenter</id>
<url>http://jcenter.bintray.com</url>
</repository>
<dependency>
<groupId>com.fewlaps.quitnowemailsuggester</groupId>
<artifactId>quitnow-email-suggester</artifactId>
<version>2.0.0</version>
</dependency>The MIT License (MIT)
Copyright (c) 2015 Fewlaps
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